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Re: 6.5T smokes
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Posted by jdemaris on September 25, 2006 at 16:30:59 from (66.218.12.96):
In Reply to: Re: 6.5T smokes posted by MF294-4 on September 24, 2006 at 20:59:43:
It sounds like you just got some wear. I don't know how many miles it has on it, but I am wondering why it had a bad valve. That's rare for those diesels. I've got six, none with less then 150K, most over 200K, and one got to over 500K before the crank broke to pieces. That's a rarity though. Never had any valve trouble with any of my diesels - truck or tractor. Makes me wonder if it had the valve damaged by some sort of debris - that originated elsewhere.
Most 6.5s are pretty whipped at the 225K mark. Not all, but most. And, the 6.5s made after 1993 are thin castings and not as strong - in many ways - as the 6.2 blocks and first 6.5s made in 93. Now, International Harvester is making the replacement 6.5s and they are thick casings again. Pretty pricey too.
Your compression reading would mean more as compared to the rest -than the PSI reading. It's likely you've got some cylinders and/or pistons with some top damage - e.g. worn ring land, broken top rings, etc. It's highest wear area of the piston, and even though your engine has Keystone sytle rings - they still go eventually and still hammer out piston grooves. My point is - many diesels - with just about no top rings left -will run fine when hot - but will smoke until they are really warm. I ran an Allis Chalmers dozer all one summer with no top rings at all. Needed ether to start it - even in hot weather - but it ran pretty good.
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