Cold Parts

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I don't know why I just now thought of this, but there is a steel treatment process that might be worth looking into for your next gottahaveit. They take the steel down to -300 F with liquid nitrogen, and it makes wear parts last longer. Take a look at the report that I wrote on it last year at ccwf. cc. utexas. edu/~jwgary/cryo/index.html Some of the information is very technical, and goes into the microstructural changes, but there is a page that deals with other uses including automotive. Those of you who tow in the mountains and get a lot of wear and warpage on your brakes might want to look at this.

 

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I have brought this subject up as a result of a conversation with Lawrence Bolton of Diesel Dynamics. He has had significant contact with the folks involved with Nascar. They routinely use this process to treat the transmission and rear diff components to virtually eliminate failure. Shot peen stress relieving and cryogenic treatment can make your drivetrain bulletproof. This would be a significant improvement for the NV4500 which has has a problem with input shaft failure.

 

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Can DCT be used on used engine blocks? Also about how much to do a complete engine and trans? Would the engine and trans have to be dissmantled? Thanks.

 

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I would assume that you would have to dismantle the engine or transmission. If the parts are laid out, they can cool down better and with more control. I would also assume that the parts have to be dry. Oil doesn't behave very well at -300 F. I am not really sure how much this costs, but if you are building up a racing engine, it will help it to last longer. Try to contact some of the people listed in the references at the end of the report for price quotes.

Cast iron behaves a little differently, but DCT also helps it as well. The carbon content is higher in cast iron so the grain improvement should help considerably.

 

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I think our Cummins use some sort of cold treatment on the engine blocks, making the cylinder walls harder. According to my brother it's standard practice on diesels, at least that is what they told him in Engine Rebuilding class. Teacher drives a Powerstroke though #ad


Vaughn

 

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JW,

Cryogen treatment I believe it's called.

All of the big HP bike motors I build get this treatment on the crank/rods. The cost is relatively cheap, like $40 to do a 4 cylinder bike crankshaft.

It supposedly aligns the "grain" in the material, which helps strenghten it. Does it work??? In the big bore air/oil Suzuki motors, and Yamaha FZR1000's it has doubled the crankshaft life expectancy under extreme use. I highly recommend it for parts that may be overstressed... . it's cheap insurance.

Dave

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2001 2500 ISB,4X4,QC,SB,AUTO,3. 55's,BLACK,AGATE LEATHER,SLT,every option except heated leather/4whl anti