Chain replacement - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 08-24-2013, 12:02 PM Thread Starter
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Chain replacement

I am reading the manual and it says I need to put piston #1 at TDC on its compression stroke

I am ok with piston #1 and TDC but how can I know if its on the compression stroke?

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post #2 of 5 (permalink) Old 08-24-2013, 06:55 PM
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You can look into the oil filler hole on the valve cover and see if both #1 cam lobes are pointing up.

Or you could take the distributor cap off and see if the rotor is pointing at the notch in the rim of the distributor body.

1981 300TD--310k miles
1970 280sel--172k miles
1966 230--162k miles
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post #3 of 5 (permalink) Old 08-24-2013, 07:02 PM Thread Starter
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Well both #1 camshaft lobes can not be pointing up as one intake and the other exhaust
Which one should be pointed up if the piston is tdc up
Is it possible the lobe to be up and the cylinder not to be tdc?
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post #4 of 5 (permalink) Old 08-24-2013, 07:10 PM
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Both lobes won't be "vertical" as in "both pointing up", but the "V" that they form will be oriented like this \o/.

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post #5 of 5 (permalink) Old 08-26-2013, 07:40 AM
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PALOLO has it right . the other way on engines where you cant see the cam , is to remove num1 plug and put your finger in hole and feel for pressure when you rotate engine to find the compression stroke .
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