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  #1  
Old 07-27-2004, 02:17 PM
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Question 1985 380SL- Do we need periodic valve adjustments?

Just curious...thanks in advance.
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'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac
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Old 07-27-2004, 03:46 PM
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AFAIK, NO ADJUSTMENTS ARE NEEDED.
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Old 07-27-2004, 05:49 PM
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No adjustment, but shimming sometimes

The valves have hydraulic "lifters" that have a specific amount of travel. Sometimes there is wear on a rocker arm or the "shim" gets cupped and the gap exceedes the travel of the "lifter". Then they make a tapping noise. In such a case the 'lifters" need to be re-shimmed to set a base position.
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1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si
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Old 07-28-2004, 11:55 AM
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Thanks Steve.

My car is making a tapping sound. I'm also due for an oil change. I'm hoping that fresh oil will quiet it a bit.
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'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac
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  #5  
Old 07-28-2004, 02:55 PM
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I was told that you can run 1 qt of ATF for a few hundred miles prior to the oil change and that might help. Personally, I would be afraid to do it. If it's tapping, oil change will probably not change anything. You need to have your lifter(s) shimmed. I am going to do this job within a couple of months.
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1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si
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Old 07-29-2004, 01:55 PM
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Steve, Could you document the procedure with pics? I'm sure many here would be thankful.
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Rick

'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac
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  #7  
Old 07-30-2004, 11:49 AM
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Okay, I will.

I always want to document but usually get into it and don't want to stop in the middle. This one, I will.
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1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si
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Old 07-30-2004, 11:49 AM
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