Between the late 90's GM engines and the later Navistar based engines? What about connecting rods?
Between the late 90's GM engines and the later Navistar based engines? What about connecting rods?
1987 Jeep Grand Wagoneer...new 6.5 in process...diamond block, 18:1's, other goodies...
Pretty good discussion of the AMG blocks in the sticky: http://www.thedieselpageforums.com/t...ad.php?t=31362
'94 GMC 6.5TD K1500 4L80E 2-Door Yukon SLE 221K
'93 Chevrolet 6.5TD K2500HD NV4500 Std. Cab Longbed 187K
'85 Toyota 22R RN60 4x4 Std. Cab Shortbed 178K (Currently retired for rebuild)
Diesel Page Member #2423
I'm talking Navistar 509 block, not the P400.
1987 Jeep Grand Wagoneer...new 6.5 in process...diamond block, 18:1's, other goodies...
The Navistar 506 blocks are the AMG blocks.
I think you’re getting the 599 (earlier GM, not Navistar) blocks mixed up with the 506 blocks - only the 506 blocks with a date code after 2000 were made by Navistar.
AMG/GEP 506 Navistar Longblock ID: http://www.thedieselpageforums.com/t...ad.php?t=30041
'94 GMC 6.5TD K1500 4L80E 2-Door Yukon SLE 221K
'93 Chevrolet 6.5TD K2500HD NV4500 Std. Cab Longbed 187K
'85 Toyota 22R RN60 4x4 Std. Cab Shortbed 178K (Currently retired for rebuild)
Diesel Page Member #2423
They will interchange.
They use the same bearings
Even the Forged crank from AMG will drop right in.
The Scat cranks fit as well.
The rods are all the same too
The changes were in the metallurgy and some internal dimensions of the block, but the basics of the crank are the same.
The old GM cranks should in my opinion be considered sketchy at best.
If you are building a fresh engine with a good solid AMG block I would not stick in an old GM crank.
Unless it was a new old stock it's going to have a lot of time on it and even if it shows good with a magnaflux test, it's a cast iron piece and could be at the end of it's life.
If the budget will handle it, get a fresh forged crank.
Just sayin.
I used a Scat crank in the last build I did.
(1) 1995 Suburban 2500 4x4
(1) 1997 Astro
(1) 2005 Suburban (Papa Smurf)
THIS IS BOW TIE COUNTRY