6nz head in acert. CAT C15 MXS in a 2005 Freightliner.

6nz head in acert. Quality Parts with 1 year warranty. i dont want to put it back together just to have stud issues in the future. It includes ARD- (Aftertreatment reaction device) and a DPF (Diesel Particulate Filter). Benefits of this ULTRA Performance Cylinder Head: Brand New & Fully loaded C15 Cylinder head. Most common serial numbers include, but are not limited to MXS, NXS, BXS. Call +1-888-642-6460 Now. I'm going to do a 6NZ conversion and keep the Mar 14, 2013 · So, any experts on this engine here? Brake stud, studs, broke and went thru the cam and windowed the head side. From out of frame overhaul kits and loaded cylinder heads to Rocker Assembly, Cat 6NZ rebuild kits, and head gasket sets, our inventory has all the parts you need to repair a C15 6NZ engine. ATL Diesel is a trusted supplier of premium-grade Caterpillar C15 cylinder head components; we consistently deliver outstanding value and reliability to customers. 003' Undersized Spacer Plate | 1389381 C15/Acert/3406E . anything to watch for? and where to get a head. what are the part numbers needed for the updated parts. Superhauler,Nov 4, 2016 Superhauler,Nov 4, 2016 #57 Buy Brand New Caterpillar Cylinder Head For C15 Acert Engines. Looks like a 7k Buy High Performance Caterpillar C15 Cylinder Head with all Inconel Valves and Fire Rings OE 2239250, 223-9250 from HDKits with warranty. Jun 8, 2013 · Hey folks, I am just getting my C15 overhaul finished up. com. also needing to get a Find new and used Caterpillar C15 Engine Brakes for sale in stock near you with fast delivery. 762 mm) Rod Torque: 59-61 ft/lbs, +90 degrees Head Torque: 189-211, 319-341 ft/lbs Dec 6, 2010 · Jump to page : 1 Now viewing page 1 [50 messages per page] The early C15s with a 6NZ serial number prefix only have one turbocharger and simple electronics, and weigh less than the 3406E, which was the C15s predecessor. Caterpillar C15 Acert Platinum Kits & Super Platinum Kits are major rebuild Kits which include the complete overhaul parts in addition of Cylinder Heads, injectors, Head Bolts & New water pump, Oil Pump, Twin Turbos high pressure and Low Pressure related parts. Buy Cylinder Head Bolt Kit For Caterpillar 3406E & C15 | MCBC15HBK | Bolts & Washers From HD Kits, Quality Parts, Free Shipping. Prefix MXS, NXS, BXS, SDP. Additionally, it lists piston configurations for admission and exhaust valves. Needing a cat number for a turbo that would work with this set up. Lightly tap the rocker arm with a soft mallet. 75 stroke crank. Pricing may vary by ESN. What is the exact procedure for adjusting the engine brake (jake brake)? Aug 14, 2019 · All these are 3406e. Looking for a reliable and high-performing Caterpillar On-Highway engine? Check out our custom rebuilt CAT 6NZ. ARP head bolts. Place the appropriate feeler gauge between rocker arm and the valve bridge. Acert twins via custom mount. $2400. I took it to MHC KW in Caterpillar C15 CRYO-TREATED Headbolt kit | ATLC15CHBKFR We are happy to announce that we are now offering a cryotreated C15 head bolt kit. com: Rawze's ISX Technical Discussion and more / Big Truck Technical Discussion / CAT, Detroit, and Other engine related Help / C15 6nz Inframe time Jun 20, 2025 · Compare the CAT engine 3406E, C15, and C15 Acert. But you'll want to put the 16 to 1 (6NZ) cylinder packs in it, a 6NZ head, (usually) a single turbo, and basically "deACERT" the engine. Bottom end has had all the machine work done and is mostly assembled. Offset feeler gauges make this job easier, get them through the Amazon Affiliate Link: https://www. It is recommended to use this spacer plate when you are changing the cylinder head but not the liners. 00 of that was labor. All in all, the Cat C15 6Nz provides powerful performance with reliable operation – making it one of the most popular engines used in heavy duty trucks today! Cat C15 Connecting Rod Torque Specs Oct 15, 2025 · The torque specs for a Cat C15 6Nz engine are as follows: the main bearing cap bolts should be tightened to 75-90 lb ft and the connecting rod caps should be tightened to 35-45 lb ft. 030" (. Start off it was a 2008 SDP with 500,000 miles. Feb 24, 2011 · The 6NZ is basically a 3406E with some minor upgrades. The engine has proven itself in terms of its economical operation, robustness, and reliability! Buy Brand New Cylinder Head Assembly For C15 6NZ Caterpillar Diesel Engine and 3406E Model Part # 245-4324, 2454324 From HDkits. Free Shipping, 1 Year Warranty. A 1mm, 2ws, 6nz, mbn or a bxs would be my choice in that order. Customer: I'm installing a cat c15 head this morning and need all the torque settings, as well as the overhead procedure and settings for serial number 6nz04778. Older gentleman, works on C15s almost exclusively. Cat c15 Cylinder Head on HeavyTruckParts. The spacer plate is just a few thousands of an inch thinner than the liner flanges, this ensures the correct liner protrusion and guarantees proper head Aug 14, 2019 · All these are 3406e. Slide the feeler gauge between the rocker arm I found person who sells BXS acert block with crankshaft and so on (the cylinder head on his acert CAT has cracked second time, so he decided to swap on DD 12. Keep your heavy-duty equipment running with HHP. These two engines are both manufactured by Caterpillar and are popular choices in the industry, but they each have distinct features and performance characteristics. Search our large inventory of New/Rebuilt/Used CAT C15 Engine Assemblies for sale. Our platinum plus kits include injectors, inframe kits, oil pumps, and more. Cat C15 cylinder head with 1 year warranty. Usually the engine will get hard to start with one of these problems though, the reason for this is coolant will start seeping into the cylinder when the engine isn't running and hydro lock it. Net. Acert engines, same heads different valve springs and a few other little differences. The complete cylinder heads have intake valves, exhaust valves, cam bearings and injector cups installed. Are these ok to use or are these the old ones that break? I am reading a few different torque methods/specs for these also. View all 49 18-wheeler Engine Brakes. Last month I blew my head gasket at 927k. Dec 31, 2015 · So here’s the background. Cylinder heads for Cat C15 & C18We specialize in Cat C15 & C18 Acert & Non Acert cylinder heads. May 19, 2011 · I have a NXS Acert that is leaking oil between the head and the block, the last oil change the engine went thru 2 gallons of oil in 10,000 miles, it is Caterpillar C15/Acert/3406E 0. Read about the differences between the 3406E, C15, and C15 Acert. Cat Man, Can you tell me the book time to remove and replace a cylinder head on a 6NZ? And what all does it include? Jan 8, 2019 · Currently having my sdp c15 rebuilt. 6L Engine Notes: supply engine serial number and arrangement number Other Notes: Year/Serial: Fuel: Diesel Cylinders: 6 Bore: 137mm Stroke: 165mm Firing Order: 1-5-3-6-2-4 Intake Valve Lash: . In order to reduce failure or cracks on the cylinder head due to overheating we manufacture these heads with 5% nickel in the casting, we enlarge the coolant passages Converting a C-15 ACERT to a 6NZ motor requires addressing differences in engine mounts, wiring harnesses, and ECU programming. 54,XXX engine serial no. This additional nickel content prevents the cylinder head from cracki HHP’s Cylinder Heads for Caterpillar 3406E, C15, and C15 Acert diesel engines produce a higher level of performance than OE heads and increase the life of your 3406E, C15, or C15 Acert diesel engines. He asks very reasonable price for the cylinder block with crank, oil pump, oil pan, front valve/crankshaft timing gears etc. I have a BXS Acert that needs a head. 015" (. Feb 26, 2010 · On #1 you set 1,3,5 exhaust to . It’s a 2005 KW T-600 with a C15 mxs converted to a 6nz. Caterpillar made the C15 to improve on the 3406E. 33 eaton DS380s Benefits of this Performance Cylinder Head: Brand New & Fully loaded C15 Cylinder head. After replacing injector cups, ensure bolts are torqued to manufacturer specifications to prevent leaks or damage. 030 and Jake's If it is a 6nz . bxs, Mxs, nxs. And, with tested TRP® parts it’s an easy decision. How much more to overhaul the Cat ? CATERPILLAR C15 ON HIGHWAY TRUCK ENGINES Caterpillar C15 Engines for On Highway Trucks to suit engine no. I looked all over Cat SIS and what I saw didn't make sense. Note: During this procedure, ensure that the intake rocker arm is in full contact with the valve Mar 24, 2015 · My 2003 has an MBN I converted to 6NZ. Available for: 1994-2009 CAT 3406E, C15, C16 Engines Key Benefits Exclusive Tempered Steel Made in the USA Warranty: 1 Year Unlimited Mile Warranty PDI Premium CAT head gasket set for 3406E, C15 and C16 engines are made for durability OEM Serial Number Prefix Applications 5EK, 6TS, 1LW, 2WS, 6NZ, MBN, BXS, MXS, NXS, SD Jan 13, 2014 · Question about switching a C15 accert to a 6Nz Discussion in ' Trucking Industry Regulations ' started by Mad dog logistics llc, Jun 22, 2016. Remanufactured long block includes rebuilt block, connecting rods, and cylinder head all installed with new piston kits, bearings and hea Caterpillar C15 Engine Parts Choosing the right replacement part or service for your vehicle—whether you own one, or a fleet—is one of the most important decisions you can make for your business. Then after running awhile, expecially with the rpm up. Goals for this build are smart, economical and reliable. Apr 27, 2023 · SRX’s C15 Acert MXS/6NZ hybrid build delivers 630 HP and 1M-mile reliability. Not trying to derail the thread, but I have a question on the proper slave lash setting for my 6NZ. 7 . 1 Piston”. Highway and Heavy Parts carries premium diesel C15 Cylinder Head Gasket Kits for Caterpillar engines. Part # 2635055, 2239250 From Heavy Duty Kits. This additional nickel content prevents the cylinder head from c Search our large inventory of New/Rebuilt/Used CAT C15 Engine Brakes | Exhaust Brakes for sale. Some customers requested that this piston be packaged with components applicable to on-highway truck applications. There are 1/2 coarse studs and Converting a C-15 ACERT to a 6NZ motor requires addressing differences in engine mounts, wiring harnesses, and ECU programming. The 6NZ is a serial number prefix used to identify an engine series from Caterpillar. In this article, we will delve into the engine configuration, engine oil specs, and Buy caterpillar C15 Cylinder Head and parts for cylinder head for Serial number 6NZ & MBN from HDkits. Bought truck with rocker bolts broken out of head from a guy who couldn't pay the repair bill. 93 part# 10R9923. Dec 17, 2011 · Jump to page : 1 Now viewing page 1 [50 messages per page] Feb 4, 2013 · 2 years ago engine starts blowing coolant out overflow, did bottle test, sure enough head gasket, took to private mech trained in cats, sure enough blown between 5 and 6, asked obout liner protrusion and he said only checks when overhauling an engine. Understanding the differences between the C15 and C15 Acert is crucial for making an informed decision when selecting Brand New Caterpillar C15 Cylinder Head for 6NZ, MBN Engine. My new question is; Are there different heads for the c15 and the c15 Acert? 3 days ago · Rawze. The only thing better about a 6nz or acert block Is the gaskets on the front and rear structures. These C15 cylinder heads will fit Cat C15 prefixes 6NZ, JRE, MCW, MXS, BXS, NXS, SDP, JAS etc. They weigh 300 lbs more than a 6nz block. Description 3406E, C15, and C15 Acert Cylinder Head for Caterpillar – Part Number: 2237263 Why Choose Our New Cylinder Head for 3406E, C15, and C15 Acert Diesel Engines? They meet or exceed OEM cylinder head specs Our stage 3 cylinder heads cool Caterpillar engines more efficiently Higher nickel content in the casting for better heat dissipation and higher resistance to cracking due to high Mar 17, 2011 · Putting the C15 back togetherneed some help Jump to page : 1 Now viewing page 1 [50 messages per page] Cost of replacing an 05 C15 Acert head with a 6NZ head. doing 16:1 ipd low compression kit. amazon. I will just block off IVA oil ports. It can run good, or considerably better, then like a switch flipped, a loss of power and runs rough, shaking at times when it's bad like it's starving for fuel. He said he sets May 13, 2020 · Put the No. Mar 18, 2015 · SDP is the engine serial prefix for the last C15 Acert that Cat produced for highway use. Looking for proper torque specs for torquing the jake assemblies, as well as torque for the studs going into the head as I have a new re-man head. With the Acert crank and 16:1 pistons. Find new and used Caterpillar C15 Engine Cores for sale in stock near you with fast delivery. Dec 13, 2023 · If you are in the market for a heavy-duty diesel engine, you may have come across the terms C15 and C15 Acert. It would take a custom manifold to get the acert stuff to work on a square port head. Our camshafts are designed to deliver maximum power and torque while increasing fuel efficiency. Engine Make: Caterpillar Engine Cubic Inches: 893 Engine Model: C15, 14. The electronic are different to allow the engine to communicate with other features that could be installed as options to the truck, AutoShift tranny is one that comes to mind. Complete C15 Long block built to your exact specifications by Engine Serial Number. Refer to Testing and Adjusting, “Finding Top Center Position for No. Our castings are engineered, designed, and assembled in the U. Two weeks ago when I bought the 5DS I paced back and forth for two hours between the 6NZ and the 5DS. Get quality OEM platinum plus rebuild kits for Cat 6NZ/3406E engines at ATL Diesel. what studs or bolts do i need on the top end? ive heard of acert engines having issues with breaking studs and bolts in the head. May 7, 2015 · They did a head gasket and r&m bearings on the 5DS. May 10, 2015 · Thought I'd run this by everyone here and get opinions on possible solutions. Highway and Heavy Parts carries premium diesel C15 Acert, C15 Cylinder Head Gasket Kits for Caterpillar engines. It is a comparable design to the C15 and the 3406E diesel engines. Get ready to Own the Road®! Get your hands on ATL Diesel's Caterpillar C15 camshafts. head is going to machine shop monday. Transporter and Operator of a Bauer Built Championship Unlimited Tractor Pulling Sled for the United Pullers of the Carolinas, Region IV affiliate of the National Tractor Pullers Association (NTPA), and damn proud of May 13, 2020 · Adjust the valve lash according to Table 2. My plan is to use the MXS bottom end with lower compression pistons, a single turbo head (from a 6nz, 7cz, ect) stock cam from a 6nz, 70 pin ECM and harness. 015. Oct 20, 2009 · I need overhaul torque specs for the c-15 acert. 79 KW W900A 3406B, Garrett GT55 turbo, RTO12513, 4. Customer: I recently completed an in-frame overhaul on a C-15 Cat engine. Many parts are interchangeable between the 3406E, C15, and C15 ACERT, but there are slight differences that are very important to note. and the brake unit is broken. Jul 1, 2016 · Cat C15 jake brake question - Austin : 7/1/2016 09:27 RE: Cat C15 jake brake question - wincresthill : 7/1/2016 15:41 RE: Cat C15 jake brake question - Austin : 7/3/2016 07:49 RE: Cat C15 jake brake question - a4t-1600 : 7/1/2016 22:30 RE: Cat C15 jake brake question - Austin : 7/3/2016 07:47 RE: Cat C15 jake brake question - a4t-1600 : 7/3/2016 10:47 RE: Cat C15 jake brake question - Austin Shop HHP for a Caterpillar C15 Acert, C15, 3406E Cylinder Head Bolt (1241855). 46. Mar 24, 2011 · Search this forum Printer friendly version E-mail a link to this thread Sep 5, 2022 · If you want to build a high hp C15, the Acert block and rotating assembly are a good foundation to build it on. 1 piston at the top center position on the compression stroke. Part# 245-4324, 2454324, 20R2645, 2239250 From HDKITS. Loosen the adjustment locknut. What I'm unsure of is injectors and tune. Our heads are similar to genuine caterpillar with 5% nickel in the casting. What makes cryo-treating so special? Cryogenic heat treatment is a precisely engineered process of taking materials down to approximately -310 F, keeping them at that temperature i Caterpillar Engine Inframe & Overhaul Kits Head Bolt, Connecting Rod Bolt & Main Bearing Bolt Torque Specifications Caterpillar® 3406A • 3406B • 3406C • 3406E • C15 Cummins® ISX • ISM11 • N14 Detroit Diesel® Series 60 Caterpillar C15 Head Gasket Torque Specifications Guide C15 engines often face head gasket failures and cylinder head warping after overheating or improper torque application. Our castings are engineered, designed, and assembled in the U. Mar 17, 2013 · I have read the 6NZ is the best C15 , what model years did they build them and what would the difference be ? Why are they so much better ? And lastly how can you squeeze the best fuel economy out of them ? I am shopping for a pre emission truck and found a few with fresh 6NZ engines and a few with fresh series 60 12. Find the best priced used Caterpillar C15 6NZ Engines by owners and dealers. The 6NZ engine is the Cadillac of all Cat engines they are mostly put in Glider kits. Call 888-642-6460. Easily find what you need from 4,420,289 parts available. CAT C15 MXS in a 2005 Freightliner. View all 44 18-wheeler Engine Cores. 5 stroke crank. Cody. 800 cam. Our Caterpillar Cylinder Head is engineered as an upgraded replacement to the OEM part with a perfect fit for easy installation. Our cylinder heads are similar to genuine Caterpillar cylinder heads. Mbn,6nz, 7cz, also 70 pin ecm engines with sculptured blocks. Find the best priced new and used Caterpillar C15 Cylinder Heads by owners and dealers. I also have a new Acert head that is laying around so I need to use what I have. Great Prices. Although the brand is known for creating heavy equipment, it also creates engines for semi-trucks, big rigs, and other large haulers on the road or in the water. I put in a 6NZ cam, rocker shafts and rockers also. I'd like to retain the twin turbos. Had issues with Nov 16, 2023 · The Cat C15 6Nz engine is known for its reliability and durability due to its strong cast iron construction and robust design. Aug 18, 2020 · What all will work and won’t work? I know cam sensor, head, cam, etc. Model engines use same heads. Then, turn the adjustment screw in a clockwise direction. Sep 15, 2023 · Caterpillar engines are a cornerstone of diesel engine technology. 033 then do the intake #1,2,4 set them to . Enjoy our hassle-free online checkout or call to speak to an expert. com/gp/product/B002YKMC9G/ref=as_li_tl?ie=UTF8&tag Jan 19, 2014 · My 2003 has an MBN I converted to 6NZ. We assure 100% satisfaction because quality of our cylinder head will meet and exceed genuine original cylinder head from the dealer. I have the Jacobs model 340C on our earlier model 6NZ. I've decided to use the newer c15 head, and IPD's hybrid / crossover head gasket that allows you to do so. No sir. Aug 23, 2011 · A blown head gasket, cracked liner flange or head will do this. When replacing the head gasket on a Caterpillar C15 engine, use a calibrated torque wrench. My rocker shaft/jake bolts have and "R" on the end and the studs have a "K". All others have 6. So, due to my damaged 6nz block I'm thinking about building such configuration: my existing 6nz Nov 23, 2009 · Doing an in-frame overhaul on a C-15 in an '04 Pete 378. Oct 7, 2025 · Browse Caterpillar C15 Cylinder Heads For Sale near you on MyLittleSalesman. If I go to a 6NZ I would need a 70 pin harness and they say the flywheel housings ($$$) are different from a C15 to an E. S. Begin by verifying physical fitment and adapting mounts as needed. 5ds, 1mm, 7cz have a 6. Fast Delivery. This action will ensure that the lifter roller seats against the base circle of the camshaft. The engine never did seem to run right The document provides torque specifications and calibration steps for various components of the CAT C15 engine. 6NZ, 9NZ, MBN, SDP Caterpillar C15 ACERT Engines for On Highway Trucks to suit engine no. Mar 28, 2022 · I have IPD 17:1 pistons, 6nz camshaft, 70 pin ecm, 6nz cam gear, new cam sensor to be repositioned, and plan on repinning the harness. With a reputation for excellence forged over many years, ATL Diesel can provide you with the quality you need when you’re replacing or upgrading your engine components. Jan 30, 2011 · My '06 C15 Acert was done by an independent shop using the gold kit and the kit it's self was $5,568. It was an MBN, now its a 6NZ with a platinum O/H kit. Learn how stronger internals, cast heads, and smart upgrades create the ultimate diesel engine. Jan 18, 2023 · Still have to find a good used or reman head so I guess the route I take will determine whether I buy an acert head or a pre acert one. IPD piston 3466615 was developed for industrial C15 Acert applications. When choosing diesel engine cylinder head components, it's Apr 21, 2015 · I'm looking a building a MXS Acert for use in a heavy haul equipment moving rig. Aug 26, 2011 · Jump to page : 1 Now viewing page 1 [50 messages per page] 4 days ago · Browse Caterpillar C15 6NZ Engines For Sale near you on MyLittleSalesman. 381 mm) Exhaust Valve Lash: . 2 Year Warranty. I talked to a local independent Cat repair shop technician about the lash setting for the Jakes on our 6NZ. Jan 18, 2013 · Posted earlier about replacing the head on my 3406e. Are they worth a flip? There's potentially significant savings but if they're junk it's not worth it. Replaces 2486740. Learn key differences, maintenance tips, parts costs, and which engine fits your needs. Loosen adjustment screw locknut (2) and back out adjustment screw (1) until actuator rod (4) is not in contact with intake rocker arm (3) . Cylinder head is sold with 1 Year Warranty. Sep 27, 2013 · The 2ws and 1 mm blocks have more cast metal in them. VALVE TRAIN BREAKDOWN CAT C -15 DIESEL TRUCK ENGINE PARTS DIAGRAM SERIAL NUMBER PREFIX: 6NZ —9NZ MBN FRONT HOUSING CYLINDER HEAD INTAKE/ EXHAUST VALVES PISTON & ROD BREAKDOWN ROCKER ARM (EXHAUST) ROCKER ARM GP (UNIT INJEœrOR) ROCKER ARM (INTAKE) SHAFT AS-ROCKER LOCK-RETAINER ROCKER ARM GP (INTAKE/EXHAUST) CYLINDER HEAD AS AS (OUTER) (INNER) SEAL-VALVE STEM (9 WASHER-SPECIAL CAMSHAFT VALVE Nov 20, 2013 · I have a SDP acert I have swapped over to 6nz specs needing some guidance hopefully from someone who has conquered the task already. using the CAT timing tool set the step flush on the bottom step set #3,5,6. 7 S60 engine). Apr 5, 2017 · Anybody have any experience using an aftermarket C-15 cylinder head? I see them for sale on eBay etc. All the parts will come from cat so no aftermarket stage 1 etc. This kit includes induction-hardened cylinder liners to reduce bore wear, resistant bi-metal piston rings, and an updated o-ring design that prevents coolant leaks. It includes specific torque values for the bench, connecting rod, engine head, camshaft gear bolts, and other engine parts. Early 550 file, 211-3025 squirts. 003'' undersized plate is recommended when your liner protrusions are too low to use the standard thickness plate. 11 SQHP rockwells 79 KW K100C 400BC1, Holset HT4B hybrid, custom injectors, RTO12513, 4. Use same head as all previous ones listed. Transporter and Operator of a Bauer Built Championship Unlimited Tractor Pulling Sled for the United Pullers of the Carolinas, Region IV affiliate of the National Tractor Pullers Association (NTPA), and damn proud of Caterpillar 3406E/C15/C15 Acert Spacer Plate | 6I4421 This Engine block spacer plateswere designed to reduce stresses on the liner flange, which could cause cracking. dont have a manual yet, does the cam slide back from the gearcase to remove head. Known for its exceptional performance and durability, the Cat 6NZ engine has become a popular choice among truckers and operators in various industries. Replaces P016364. I am a heavy duty tech very familiar with previous cats ie 3406 B, E, c-12, c-15, etc and have overhauled most cat models on the road today. Thanks for the help!! Bill Feb 14, 2024 · Cat 6NZ Engine Specs: Power and Performance The Cat 6NZ engine is a powerful and reliable engine that has been widely used in heavy-duty trucks and equipment. will the 6NZ packs work on the acert crank? Also going to run a 130-9710 marine cam and 10r0958 injectors. Availability:: Usually Ships in 24 to 48 Hours Product Code: 3406E-FUEL-COOLANT-LINE-KIT For the 6NZ engine, rocker arms and Jake brake torque specs are identical. Additionally, the cylinder head bolts should be tightened in two stages; first tighten all of them to 22-29 lb ft then an additional pass at 55-72 lb ft. Feb 10, 2015 · Are there any good flash file and fls fts combinations that anyone is willing to share for The Acert Engines? Preferably with decent fuel mileage? Jan 21, 2020 · To 4WD, or any other Cat gurus on here. Total cost of the inframe including a reman head $11,961. I can get $2500 from them to keep the 5DS and give them my 6TS. A. They are better than OEM quality containing 5% more nickel content in the casting material. If it was up to me i would put in a 6NZ And but the adapter for the Apr 25, 2013 · The twin on the mechanical cat that were brought up in that thread are not acert twins. We proudly sell these cylinder heads with One Year Warranty. What is CAT Platinum Overhaul Warranty? Sep 10, 2024 · The 6NZ is the most popular C15 type, and this inframe engine rebuild kit is one of two rebuild kits we offer for 6NZ engines. BXS, MXS, NXS CATERPILLAR C15 MARINE ENGINES Full range of Caterpillar C15 Marine Engine Applications For enquiries contact us now! We sell bare and complete Cat C15 cylinder heads for 6NZ application. Quality Diesel Engine Parts. ma wuo irm 2y1acm 3smkx ualck pqbl tawptl5tfo yqgk 32catr