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Old 12-27-2001, 03:14 AM
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Question Mercedes 300SE - Ticking noise

Hi, could somebody help me, my merc 300SE,1989 model started to make ticking noise, when is on P or D or N. Seems like it's go faster while I accelerate. I couldn't here the ticking noise while I am driving. The ticking seems to be coming from the top of the head, is it the valve (that's what mechanic thinks, without even opening the rocket) or something simpler, means not so expensive? The oil pressure is ok, and besides ticking is running fine. Anybody has an idea??
Thanks Nina

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Old 12-27-2001, 08:39 AM
Mike Murrell's Avatar
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Join Date: Feb 2000
Posts: 2,580
Might be a faulty hydraulic lifter. How's the oil level? You might want to look through the search facility here.
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
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Old 12-27-2001, 08:46 AM
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Mercedes300SE Ticking noise

Oil level it's ok, tat's what i am going to check tommorow, hydraulic lifters and rocker arm. thanks
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Old 12-27-2001, 04:58 PM
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It could be a leaking exaust manifold gasket causing the noise. Is the noise worse when the engine is cold? I recall someone with a 560SEL posting about a similar noise only to find out that it was simply an exaust leak. Good luck.
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Old 12-27-2001, 08:14 PM
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if the ticking corresponds with the speed of the cam shaft(faster speed faster ticking) then it coukd just be your valve clearence.
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Old 12-27-2001, 08:48 PM
ymsin's Avatar
Driver, Mercedes-Benz
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
I agree with Mike on the possibility. It won't do much harm if it is so.
... Kerry

126 tailed by a 203, 129 leading the pack.
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Old 12-27-2001, 10:27 PM
J.HIDALGO's Avatar
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Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
I don't know about your car but...

my 300E had a similar noise. It was the engine shock!
'86 300E
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Old 12-28-2001, 09:28 AM
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Smile Mercedes300SE Ticking noise

Thanks very much for the advise, this site it's really great. The noise corresponds with cam shaft speed and my husband agrees with Mike and Kerry that's probably it is the valve clearance, (doesn't make any difference if engine it's cold or not). He is going to check over the weekend and I let you know. Thanks again. Nina
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Old 12-28-2001, 01:36 PM
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Join Date: Dec 2001
Posts: 577

Is he going to attempt to adjust valve clearance?

The 103 motor uses hydraulic lifters. In this situation, manual adjustment is not possible.

Mike Richards

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