AMG/GEP 506 Navistar Longblock ID

[More Power]

AM General assumed 6.5 engine production in mid 2000, and quickly handed block and cylinder head casting duties off to International Casting Corporation (Navistar) in 2001. International has been casting all of the 6.9L/7.3L/6.0L/6.4L diesel engines used in the Ford pickups since 1983.

The first Navistar/AMG 6.5 rolled off the General Engine Products assembly lines in November 2001. Those made since November 2001 are the very best 6.5 production engines - so far.

Navistar was tasked with solving the cracking problem GM experienced in both the cylinder blocks and the cylinder heads. Navistar accomplished this by increasing the moly content in the block and introducing a number of design changes. The cylinder heads saw an alloy change to include more chromium.



This photo shows an International/Navistar/AMG produced 6.5L diesel longblock, and was shown to us during the 2005 Rendezvous in Salt Lake City by Peninsular Diesel - who is an authorized retailer for AMG/GEP.

The numbers 1-7, as indicated in the above photo help to describe how to identify these blocks.

1- The Navistar symbol is cast into the engine valley.

2- The "506" casting number can be found in a few places on the block. The two #2's as identifed on the photo include the 506 number.

3- The casting date is also an indicator of when the block was actually cast by International. It should show a date of November 2001 or newer.

4- These blocks include two Oil Pressure Switch ports. The valley location was used by the 1996 or newer civilian model engines.

5- The OPS bellhousing flange location was used by the 1992-95 civilian model engines.

6- This pipe is used as a valley drain. Any liquid accumulating in the valley can drain through this line to a location above the oil filter.

7- This is the engine speed sensor used by the 4L80-E automatic. It is afixed atop the oil pump drive assembly.

Jim

[Kennedy]

THANK YOU!!!

Now we just need to see how much of this detail the China castings have. I'd guess they are the same except for maybe the fact that they use the same julian date for every unit

[TurboDiverArt]

I'd guess they are the same except for maybe the fact that they use the same julian date for every unit

That's pretty funny!

Do the older GM blocks also have a julian date in the same location?

Art.

[More Power]

I spoke to GEP recently about the imported blocks. I was told that aftermarket cylinder blocks cannot legally use identification marks such as GM, AMG, GEP, Navistar or even the 506 casting number. They are aware of the heads & blocks, and have evaluated them (cut them up to look at casting qualities and alloys). They wouldn't comment on them further.

By the way.... the forged-steel cranks are almost here....

Jim

[simon]

I spoke to GEP recently about the imported blocks. I was told that aftermarket cylinder blocks cannot legally use identification marks such as GM, AMG, GEP, Navistar or even the 506 casting number. They are aware of the heads & blocks, and have evaluated them (cut them up to look at casting qualities and alloys). They wouldn't comment on them further.

By the way.... the forged-steel cranks are almost here....

Jim

I do have metal chemical content done on a china block, i have the records.
does anyone have the same on a stockblock? I would like to compare data to see how the china blocks stack up against stock.

[john8662]

Please post items in this location that can help identify a Navistar Block, for questions about the block you have, post a new thread in the 6.5 Diesel forum.

For those following recent activity about a block, it's here:

http://www.thedieselpageforums.com/t...ad.php?t=34961

Thanks!