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Wayne
12-27-2003 23:22:23
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Re: Detroit Diesel Engine in reply to E. Borchardt, 12-27-2003 10:23:13
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Like one of the posts says there are 8 different ways an inline 53 or 71 series Detroit can be set up, but there is still only a Left and Right handed rotation. All the "technical" stuff has to do with which side the cam, blower, starter, and exhaust are on. The cam will always be on the opposite side from the exhaust for refference purposes. Depending on which one of the 4 RH rotation versions your changing from/to and which of the 4 LH rotation versions your going from/to you may have to tear the engine down a pretty good ways. I say this because in some of the changes you have to change the position of the idler gear which means drilling out the plug in an oil passage and plugging the one in the oposite side, changing which end the thrust washers on the cam and balance shaft are on, getting the timing reset for the opposite rotation, changing the oil, fuel and water pump for the different rotation etc, etc etc. I just got done building a RH rotation 4-71 for a customer who had wanted me to take another engine he had that was a LH rotation and make it RH rotation to replace it. By the time I would have taken both engines apart, done all the necssary parts and plugging changes, and put that engine back together rotating the right way I would have had more labor in it than I was gonna have simply rebuilding the RH rotation engine from the ground up. In case you get that far a total rebuild, including machine shop charges, parts and labor, here in NC, is running anywhere from $1200-$1500 per cylinder as long as you aren't having to replace any major components like the block, head, or crank. You can check out E-bay, there are always Detroit service manuals for just ablout any model you may have listed at pretty good prices. I have built a good many of the two stroke Detroits over the years, so if you want to do a rotation swap and need any help, feel free to email me and I'll be glad to help out all I can. There is alot to the old two strokes but when you get right down to it they are one of the most simple engines I've ever worked on. Wayne
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