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Old 04-18-2001, 11:55 AM
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Hi Everyone,
Thanks in advance for reading my inquiry! My 77 450SL has a ticking noise when I first start it in the mornings. After several minutes, it goes away and then idles quiet. This also happens when it sits for a number of hours. Is there an adjustment on the valves that can be done? Have the manual, but it doesn't say anything about adjustments. Is this a serious problem, or do I just live with it? The car has 130,000 miles. Neatest car I've ever owned..Thanks again Ted
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Old 04-20-2001, 12:30 AM
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Join Date: Apr 2000
Posts: 412
I believe there is a valve adjustmenton the 450SL. I hang around my clients import repair shop that specializes in Mercedes Benz. He did a valve adjustment on a 450SL one day when I was there. I don't remember what year the SL was, I think it was a 75. The car had the cams replaced and a valve job. I remember what fun they had reinstalling the exhaust manifolds. It is something that is learned from experience. Bert said SL stands for SUPER LOUSY to work on.
1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T
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Old 05-08-2002, 05:01 PM
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I was searching through the archives and came across this post If you haven't fixed the problem yet. I also have a 77 450SL it has hydraulic(self adjusting)lifters. Take off the valve cover and check the rocker arms and camshaft lobes for wear. I had one of my rockers and camshaft replaced 30,000 miles ago which was 140,000 miles then. Sound like a coincidence?
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Old 05-08-2002, 06:52 PM
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Join Date: Oct 2001
Location: Vienna, WV
Posts: 121
Checking your cam shafts is a good idea. If they are good then there is a better than even chance that synthetic oil will reduce or eliminate the noise. That is if you aren't using synthetic now.
Tom Savage
Vienna, WV
1984 300D Euro
1995 S320
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Old 05-08-2002, 07:50 PM
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Join Date: Feb 2002
Location: Seattle WA
Posts: 39
ticking valves

Hello Ted.
I experience the same thing on my 190e. It only happens when I switch to 20w-50, and it's a cool morning. When I have 10w-30 or 10w-40, no problem, might be the viscosity. What weight are you using?
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