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#1
05-04-2004, 02:23 PM
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117 timing chain rails
I just replaced the 3 upper rails in the 560SL. It was a fairly
simple job that required a lot of stuff be moved and pushed out of the way, but not much heavy disassembly of parts. In order to make my tool kit mercedes capable, I added a full set of allen socket drivers (4mm to 17mm) for doing everything from removing little bolts to the drain plug in the rear diff. (including the oil pan and the steering wheel). The 1 1/16 inch socket is close enough to the 27 mm needed to turn the engine over with a breaker bar by the crank bolt. Other than that, the rest of the tools are straight forward. Get a torque wrench and learn how to use it. I also am very careful when starting a spark plug into the head. This is a job to be done by hand (either at the end of the 3/8 extention or in a length of fuel hose, never forced with a driver! There are some very poor choices of material that were made, but the overall approach and accessibility is good. No need to shy away from even this task for the DIY crowd. Spend $60 on the pin puller or small slide hammer. The job would have been easy if I had done that. It cost me about 3-4 hours to struggle with a home grown socket,washer and bolt puller. 
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#2
05-04-2004, 09:42 PM
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Where can one get this pin puller? Can you post a pic of your home made tool? BTW, if you own a 560, I believe it is an M119. I think the M117 is the 420's engine.
Thanks David EDIT: How many miles were on your car and what about chain stretch? Also, how long did it take you? Congratulations, feels good doesn't it?
__________________
_____________________________________________ 2000 Honda Accord V6 137k miles 1972 300SEL 4.5 98k miles _____________________________________________
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#5
05-05-2004, 12:01 PM
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details
I had 91,000 miles. Replaced the rails just because of age - 1988 vehicle. After the install including new tensioner, zero stretch.
It took me about 7 or 8 hours to do eveyrthing, but it was done a hour or two here and there over a week and a half. Did top 3 rails, cam oilers, all belts and resealed the rear cover of the p/s pump. Pin puller - just to a yahoo search on "mercedes pin puller" $65 - looks the best http://www.etoolcart.com/browseproducts/Mercedes-Benz-Rail-Pin-Puller-Guide-M0044.HTML $35 - It will work fine, but mught require you find a few sockets, large washers or pieces of pipe to make it work. http://www.etoolcart.com/index.asp?PageAction=VIEWPROD&ProdID=160 The real benifit to these tools is that they allow you to put a 14 or 15 mm wrench on the bis nuts to pull the pin out. I was using a 6mm x 45mm cap screw with a stack of large and small washers. Not fast or efficient. I would spend the $35 in a second if I had to do it again.
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