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Noisy valvetrain upon cold start?

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Old Dec 29, 2008 | 09:08 PM
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Noisy valvetrain upon cold start?
Do any of your M113 engines make a quick and brief tap, tap, tap when starting up cold? It only happens when the engine is cold and revs to 2k rpms upon startup.
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Old Dec 30, 2008 | 01:47 AM
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No, But I notice my steering wheel is firm at start up.
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Old Dec 30, 2008 | 09:52 AM
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Originally Posted by newton22
Do any of your M113 engines make a quick and brief tap, tap, tap when starting up cold? It only happens when the engine is cold and revs to 2k rpms upon startup.
not unusual. Sounds like you get a little bit of tensioner noise until they get decent oil pressure. If your car has higher miles, I wouldn't be concerned unless it still makes the noise when warm or for more than a few seconds.
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Old Dec 30, 2008 | 10:41 AM
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I hear some sounds but once it warms up in 2 or 3 minutes everything sounds brand new. I did hear a belt sound this morning.
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Old Dec 30, 2008 | 12:16 PM
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Originally Posted by newton22
Do any of your M113 engines make a quick and brief tap, tap, tap when starting up cold? It only happens when the engine is cold and revs to 2k rpms upon startup.
I get this too (tap, tap) but it seems to have subsided after my oil change. I went from 5w40 oil to 0w40. The car cranks much easier now in the cold than before too. My guess is the 0 weight oil gets to all the components much quicker so the tap is probably a very brief lack of lubrication during startup. This effect was probably amplified since the old oil was obviously old and the new oil was clean and had a thinner cold rating.

Belt noise on the other hand is always there in the cold but subsides when the engine fully warms up. I even started getting it on my R which MB has released a service bulletin for.
Last edited by ~CL500~; Dec 30, 2008 at 12:22 PM.
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Old Dec 30, 2008 | 02:41 PM
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My car has only 57k miles and I've been using 0W-40 since the beginning of time. The only time I won't have this tapping noise is when I change the oil and put fresh oil into it.
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Old Dec 30, 2008 | 02:48 PM
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Time for an oil and filter change. When I start hearing my lifters it is a good indication the oil has broken down. Usually around every 5k miles.
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Old Dec 30, 2008 | 02:52 PM
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Why did they change it from 3k miles to 5k Miles?
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Old Dec 30, 2008 | 03:16 PM
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Originally Posted by abhatti55
Time for an oil and filter change. When I start hearing my lifters it is a good indication the oil has broken down. Usually around every 5k miles.

I'm glad others concur. Mine started around 6K miles and I finally changed the oil at 7K miles. So all in all, I guess it's best practice to change when we hear the sound.
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Old Dec 30, 2008 | 06:59 PM
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LIFTER IS THE PROBLEM I DO THIS ALL THE TIME UNDER WARRNTY BUT IF YOUR OUT LIVE WITH IT
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Old Dec 31, 2008 | 03:26 PM
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Originally Posted by abhatti55
Time for an oil and filter change. When I start hearing my lifters it is a good indication the oil has broken down. Usually around every 5k miles.
It's only been 2500 since I last changed the oil. I'll get this noise 500 miles after an oil change.
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Old Jan 2, 2009 | 02:19 PM
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Originally Posted by newton22
It's only been 2500 since I last changed the oil. I'll get this noise 500 miles after an oil change.

If that's the case, it might be indicative of a greater problem. As blas0827 posted, you might have an issue with your lifters. Hopefully it's not too serious, but you should prob get a diagnosis anyway just to put the issue rest and know your options.
Last edited by ~CL500~; Jan 2, 2009 at 02:22 PM.
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Old Jan 2, 2009 | 06:02 PM
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I'm not sure about the m113 but alot of mercedes engines have a problem where the oil guides get clogged up causing a tapping noise.

There is a diy somewhere to explain it and the repair but I can't find the link. Ill post it if I find it.

http://www.k6jrf.com/MB_lifter.html

Is one link but not the one I'm thinking of , it references the m119
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Old Jan 2, 2009 | 06:44 PM
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no oil guides in the 112/113
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Old Jan 2, 2009 | 06:47 PM
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yeah that could happen if you dont do oil changes it looks like gunk
Originally Posted by illmeth0d
I'm not sure about the m113 but alot of mercedes engines have a problem where the oil guides get clogged up causing a tapping noise.

There is a diy somewhere to explain it and the repair but I can't find the link. Ill post it if I find it.

http://www.k6jrf.com/MB_lifter.html

Is one link but not the one I'm thinking of , it references the m119
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