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Author Topic: Valve train noise  (Read 4405 times)

Bill dierker

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Valve train noise
« on: June 28, 2017, 13:36:13 »
 Excessive valvetrain noise
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Benz Dr.

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Re: Valve train noise
« Reply #1 on: June 28, 2017, 14:25:51 »
Excessive lack of info.
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1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

DaveB

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Re: Valve train noise
« Reply #2 on: June 28, 2017, 22:06:44 »
Quote from: Benz Dr. on June 28, 2017, 14:25:51
Excessive lack of info.
  :)

They are all pretty noisy, if you listen to some running motors on youtube you will get an idea of 'normal'. A valve adjustment may reduce the noise but I guess you already did that? You might also want to check the cam lobes & rocker faces for wear and check that the oil supply tube to the valvetrain is clear.
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DaveB
'65 US 230sl 4-speed, DB190

Iconic

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Re: Valve train noise
« Reply #3 on: June 29, 2017, 00:04:27 »
Quote from: Benz Dr. on June 28, 2017, 14:25:51
Excessive lack of info.
;D I lost it on this one Dan !!!
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1970 280 SL Automatic, USA version, Grey-Blue (906G/906G), Blue leather (245)
1968 SS396 Camaro Convertible (owned since 1977 -- my first car :D)
1984 Porsche Euro Carrera coupe, LSD, SlateBlueMet/Blue
1998 BMW M-Rdstr Estoril Blue
1970 280 SL Automatic, Anthracite Grey-173G, Red Interior-132 - sold

Rhinkel

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Re: Valve train noise
« Reply #4 on: June 29, 2017, 04:56:52 »
I had the issue too and I couldn't isolate it. Turned out I found a great mechanic , Steve Marx in Costa Mesa, Ca.  In 5 seconds he said- it the chain tensioner for the camshaft. Sure enough he was right. Sounds a world different since its replacement. Could be many things of course but someone that really knows these cars can isolate and resolve very quickly.
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ja17

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Re: Valve train noise
« Reply #5 on: June 29, 2017, 06:13:17 »
Yes all good previous answers, look at the rocker arms for wear, check to make sure that the valve cover hold-down straps are not rubbing against the cam.
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Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

waltklatt

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Re: Valve train noise
« Reply #6 on: June 29, 2017, 15:19:56 »
Timing chain tensioner?
Oil pump?
List goes on, till more info is added.

Bill, more info is needed.

Good one Dan!
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Cees Klumper

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Re: Valve train noise
« Reply #7 on: June 29, 2017, 17:48:27 »
I wonder whether TS will be back ...
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Cees Klumper
1969 Mercedes 280 SL automatic
1968 Ford Mustang 302 V8
1961 Alfa Romeo Giulietta Sprint Coupe 1600
1962 FIAT 1500S OSCA convertible
1972 Lancia Fulvia Coupe 1.3
1983 Porsche 944 2.5
1990 Ford Bronco II

Bill dierker

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Re: Valve train noise
« Reply #8 on: October 11, 2017, 15:38:56 »
inherited car from uncle who bought it new. warped head. didnt run. had cylinder head repaired and straightened. valve job done. torqued head according to manual. Same with lash adjustment. twice. Seems like it has a lot of valve train noise but I have never heard one of these cars run either. Might be normal idk.   Smokes when started in morning. Shouldnt with new guides and seals
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Cees Klumper

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Re: Valve train noise
« Reply #9 on: October 11, 2017, 16:17:47 »
Your timing chain may be worn. It can be replaced without taking the head off, not a big job.
Also the cam may be rubbing up against the valve cover 'posts' (that the cam cover bolts screw into - they are not very robust and can get bent out of shape when the bolts are torqued too tight).
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Cees Klumper
1969 Mercedes 280 SL automatic
1968 Ford Mustang 302 V8
1961 Alfa Romeo Giulietta Sprint Coupe 1600
1962 FIAT 1500S OSCA convertible
1972 Lancia Fulvia Coupe 1.3
1983 Porsche 944 2.5
1990 Ford Bronco II

Bill dierker

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Re: Valve train noise
« Reply #10 on: October 12, 2017, 16:56:44 »
Thanks I will follow up on those tips, I appreciate it!
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ja17

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Re: Valve train noise
« Reply #11 on: October 13, 2017, 07:32:28 »

As mentioned be sure to check the valve  cover hold-down straps.
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Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

ja17

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Re: Valve train noise
« Reply #12 on: October 13, 2017, 15:08:26 »
Bill, also read this long  thread about engine noise etc. especially page 3 on rocker arm noise.

https://www.sl113.org/forums/index.php?topic=21603.0
« Last Edit: October 13, 2017, 15:13:12 by ja17 »
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Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback
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