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#1
08-08-1999, 08:02 PM
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How involved is replacing the timing chain/tensioner/etc. on a '81 300SD ?
I am comfortable with most light engine work. Is there a standard parts list ? Does it require proprietory MB tools ? I have no way of telling if this was ever done on the car, which has 190,000 miles on the clock. I do not see a sticker indicating date/mileage of replacement. Also, should I look into replacing the waterpump during this operation ? The engine runs and great in all regards and gets 27+ on the highway. Thanks |
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#2
08-08-1999, 09:26 PM
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If it isn't broken don't fix it. If you want to check its worthyness, just take off the valve cover and turn the engine by hand until the mark on the camshaft thrust washer lines up perfectly with the line on the cam stand. Take a flashlight and look at the degree marks on the crank balancer on the front and read the mark. If it is equal to ar less than 5 degrees you are OK. If not then think about replacement.
------------------ Benzmac: ASE CERTIFIED MASTER AUTO TECHNICIAN SERVICE MANAGER FOR 14 BAY FACILITY MERCEDES SPECIALIST 8 YRS PARTNER IN MERCEDESSHOP.COM |
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#4
08-08-1999, 11:22 PM
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The bolt on the crankshaft is a 27mm or you could use a 1 1/16". I personally would consider having the chain changed at that mileage as a preventative repair. Also replace the tensioner assembly. I would not consider a chain replacement "light engine work", so you might let a qualified tech do this repair.
Just my opinion. ------------------ MB Medic 14 year MB tech 7 year shop foreman @ independent MB/Volvo shop |
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#6
08-09-1999, 09:26 PM
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If the t-chain has wear the cam gear usually has the same.
------------------ Benzmac: ASE CERTIFIED MASTER AUTO TECHNICIAN SERVICE MANAGER FOR 14 BAY FACILITY MERCEDES SPECIALIST 8 YRS PARTNER IN MERCEDESSHOP.COM |
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