Re: Chevy 6.5 diesel

Posted by jdemaris on February 28, 2007 at 12:37:47 from (66.218.17.61):

In Reply to: Chevy 6.5 diesel posted by Jon Holt on February 28, 2007 at 09:27:21:

I have to agree, more-or-less with what Matt Weltz stated. I've got over 20 trucks with 6.2 and 6.5 diesels. My 87 diesel Suburban was used for 520,000 miles pulling a stock-trailer - mostly on flat highways though. At 520,000 the block and crankshaft went to pieces. My son put another engine in it and he's still driving it.
If I had to do some serious towing - e.g. 8000 lb.s trailer and up - and had some hills to climb- that's a different story. I use my Ford with the IH 7.3 turbo diesel - it is much better - for that purpose.
And, of course the 5.9 Cummins is better than all of them - it has to be - it a totally different class of engine. Cummins 5.9 is a MD engine, GM 6.2s, 6.5s, Ford IH 6.9s, 7.3s, and 6.0s are LD engines.
I can't say anything negative about the Cummins other than the trucks they are planted into (and the price).
6.5 had a heavy block first few years it was made - that was shared with 6.2. Then it got cheapened and lightened to the point where it had some cracking issues - with the heads, main-webs in the block and one rear cylinder wall. Also, it had some real bad reliablility issues with the 1994 - on DS2 electronic injection controls. By this point in time, the pump problems been ironed out (mostly).
Funny thing is - now - the same company making the Ford IH blocks is casting the new 6.5 GM blocks (mostly for military and marine use). The new company is Remy International - both having roots from the former Delco-Remy - and International Harverster. And, new heavy-duty 6.5 heads are being made in China.

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