Re: MF35 tractor with Chevy 6.2 diesel and Olds D

Posted by Bob on November 02, 2006 at 14:01:35 from (69.178.229.154):

In Reply to: Re: MF35 tractor with Chevy 6.2 diesel and Olds D posted by 135 Fan on November 02, 2006 at 13:16:35:

The early Hummers are reputed to have just as bad of a block as the GM pickups. GM turned the manufacture of the engines over to GEP (General Engine Products) after the REALLY crack-prone 6.5 blocks equipped with piston cooling nozzles that were produced in the late 90's. They took a block that was ALREADY prone to cracking, and drilled oil galleries, and installed piston cooling nozzles to allow the engine's HP to be kicked up to try to keep up with FORD. The drillings only served to cause MORE cracking.

Lacking a foundry, GEP "farmed out" the casting of the blocks to NAVISTAR. After a certain date, 6.5 blocks used in HUMMERS, as well as NEW replacent 6.5 blocks bear the "NAVISTAR Diamond" logo as a casting mark in the central valley of the engine. The blocks has some added webbing for more strength, and are reputed to have a higher nickle content than the GM-produced 6.5's. True story.

Replies:

• IH can't use their own name jdemaris 18:34:13 11/02/06 (0)

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