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There may still be a few P400s out there somewhere for sale, but gosh I would hate to see the price. GEP is working on new vehicle concepts so maybe they will restart P400 production someday.
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Thanks Arlen. Mark Bendler found a good '91 NP241 with the mechanical speedometer to rebuild so I am good to go. I had rather have the mechanical speedometer anyway, because my goal for the entire project has been to eliminate as many electronics as possible. That is why I went with a built 700R4 instead of a 4L80E - no electronics. Also why all my gauges will be mechanical, not electric.Awesome build man.
I used a P400/4L80e/NP205 set up. It does suck for all that. It could be easier, so consider this. Programable electronic speedometer makes proper speedometer gear irrelevant. In case you run into issues with your aforementioned route.
No, that is a standard 6.5 GEP longblock, not a P400.Hello,
Is this the same motor like the one you bought?
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No, that is a standard 6.5 GEP longblock, not a P400.
Just found this last night, thought some of you might like to know. Rock Auto seems to be selling blocks.
1998 CHEVROLET K1500 PICKUP 6.5L V8 DIESEL Turbocharged Long Block | Shop Now at RockAuto
Engine Parts and More for Your 1998 CHEVROLET K1500 PICKUP at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.www.rockauto.com
Not P400 but 506 and 599 according to the description. The block pictured is a 506 that carries the Navistar diamonds though...
In my opinion, no it is not close to the P400. The ad indicates that it is a remanufactured engine, probably assembled by Jasper or one of the other outfits out there from used parts. In contrast, the P400 engines were developed by GEP to power the new upfit HMMWV which weighs over 15,000 pounds due to the addition of body armor. All P400 engines were designed, engineered, and assembled with brand new parts to power the heavier vehicle. Unfortunately GEP lost the U.S.Government contract for the future HMMWV. It is my understanding that a quantity of P400 engines, which were crated and in GEP’s inventory, were released to the public after they lost the contract. I consider myself extremely lucky to have acquired one of these engines. My only regret is not buying more than one.Is it close to the P400? Seems like SOB to get that might as well just get a LBZ hehe.
In my opinion, no it is not close to the P400. The ad indicates that it is a remanufactured engine, probably assembled by Jasper or one of the other outfits out there from used parts. In contrast, the P400 engines were developed by GEP to power the new upfit HMMWV which weighs over 15,000 pounds due to the addition of body armor. All P400 engines were designed, engineered, and assembled with brand new parts to power the heavier vehicle. Unfortunately GEP lost the U.S.Government contract for the future HMMWV. It is my understanding that a quantity of P400 engines, which were crated and in GEP’s inventory, were released to the public after they lost the contract. I consider myself extremely lucky to have acquired one of these engines. My only regret is not buying more than one.
The historic weakness of 6.2/6.5 engines has been in the bottom end around the main bearings and associated castings. The design of the P400 solved this inherent weakness by the addition of a cast iron girdle between the block and oil pan with newly designed main bearing caps integral to this girdle, which is massive in itself and 3 inches tall. Additional strength was achieved by utilizing a forged crankshaft, forged connecting rods with cracked-joint technology, forged pistons with ceramic coated top surfaces, hardened valve guides and seats, and improved cooling and lubrication passages.
There is no way to obtain these features in a remanufactured engine assembled with used parts.
I hope this helps in understanding exactly what a P400 is.
Good luck! I don't think many were made and not sure any made it into HMMWV's. If you happened to find a new one, I had seen prices of $12,000. This is the ultimate 6.5 series engine but sadly they stopped producing almost as fast as they started.I did not know that! Now I must get one! Are they easy to spot? I guess the likey hood of finding one in the junkyard would be zero to none. How much you want for yours =]. Maybe I could source one from a wrecked HMMWV
To my knowledge, there are no new P400 engines available. In the past 4 years I have seen only 1 used P400 on ebay, and it looked like it had been run hard. Mine is not for sale. You may want to reach out to Leroy Linza in Houston. A couple years ago he purchased the last P400 long blocks GEP made available. He may have one left or might know where one is. His number is 713-408-0423. info@leroydiesel.com .I did not know that! Now I must get one! Are they easy to spot? I guess the likey hood of finding one in the junkyard would be zero to none. How much you want for yours =]. Maybe I could source one from a wrecked HMMWV
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