Hi,

I have a 1987 300E and lately (last I month) I have started to notice a clicking noise from the engine, I coincides with the engine speed, if I step on the gas the noise gets faster. Its not a severe noise and I mostly here it in the garage where the noise echos back to me. I do use premium gas at all times and about 3 months ago ran some Techron cleaner in there as well. Any suggestions would be greatly appreciated.

Well it has something to do with moving parts...It could be one of the pulleys, belt tensioner, fan clutch, poly-v belt...your best bet is to open the hood, and pin point the sound exactly.

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you might have a worn camshaft or rocker arms.

I just had that work done on my 76 450sl but my car was know for camshafts wearing out.
If it is a camshaft you can hear which side it's from by opening the hood and listening carefully.
then again, it could be any of the minor things mentioned by the previous post.

how many miles on your car?

Thanks for the replies. The car has approx. 160,000 miles.

this could be loose rocker assembly bolt[s] that have pulled the aluminum threads.this can be fixed.take off valve cover and have a look.remember with aluminum threads it's not a case of if the threads will break BUT WHEN! david poole european performance dallas tx.

Also it is possibly a worn tensioner shock. You can eliminate this by holding the top of the shock down with a long screw driver while the car idles.

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I am a mechanical novice could someone tell me or show me a pic of where the tensioner shock is located.