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Tractor Talk Discussion Forum

'95 6.5TD GM revisited

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JCSinGA

09-08-2006 12:17:59




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I'd like to thank everyone that posted to my prior question, it was all good info. My block is bad, it has spun the front cam bearing beyond any hope of re-use, unless I spend $700 for a big automotive machine shop in Atlanta to sleeve and line bore the hole. My question is there any difference block wise between a turbo version and non-turbo, I've found a non turbo engine that I will build myself if I can use all my turbo stuff in it. I know fuel system and mabye heads different, anything else? Thanks

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jdemaris

09-09-2006 04:45:33




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 Re: '95 6.5TD GM revisited in reply to JCSinGA, 09-08-2006 12:17:59  
Besides what was already mentioned, the pistons are different also. The naturally aspirated 6.5 has a different mechanical compression ratio (it's higher) than the turbo version. From most of the testing I've read about, putting the turbo onto an engine that was origianlly non-turbo is fine as long as you don't exceed 10 PSI boost.



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Bob

09-08-2006 16:56:39




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 Re: '95 6.5TD GM revisited in reply to JCSinGA, 09-08-2006 12:17:59  
In that time-frame, the blocks would be the same, and even the heads between the turbo and non turbo.

The indentifying block casting number will be at the upper left rear of the block, behind the LH cylinder head. You can compare numbers, and see if they match.

About 1997, or so, they drilled more oil passages in the block, and installed piston cooling nozzles, and for a couple of years in that time-frame, the blocks were MORE prone to cracking, because the extra oil passages weakened them. Think twice before buying a block of that era.

WHATEVER block you buy, have it Magnafluxed before purchase, or have it in writing that you can get your money back, if it turns out to be cracked, or otherwise unusable.

The current production replacement engines, made after that series, are a higher nickel contact cast iron, and have been made heavier in critical areas.

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