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Old 07-11-2002, 09:40 PM
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Join Date: Feb 2002
Posts: 6
Unhappy 300ce noisy lifters

My 1991 300ce with 35k miles has a clattering sound from the top of the engine. It sounds like the lifters are loose. The car runs good. I change the oil ever 3k miles. The noise is fairly loud when the car is first started and seems to stay until the car is driven for a few minutes. This happens when the engine is cold or when it is hot.

Any help would be very much appreciated.

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Old 07-11-2002, 11:12 PM
WRM WRM is offline
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Join Date: Jun 2002
Location: BURBANK CA
Posts: 151
it is very difficult to determine with lifter it might be if that is what the problem is. you would need to remove both camshafts. so you should just replace them all.
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Old 07-12-2002, 12:17 AM
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Join Date: Feb 2002
Location: Seattle
Posts: 596
I have intermittent noisy lifters in my 92 300TE which I believe is SOHC like yours (not two cams). Noise on mine at startup cold only. I have 105k. I will probably need physical work done, but have made the problem go away for months and many miles at a time with 2 of the following three things: 1) Race it. I took mine for a day on the track of performance driving school. Noise went away for about 7 months. Using Shell Rotella at the time. 2) Changed to Mobil1 no change in noise. Engine leaked a bit more at first and then oil consumption decreased to about a quart every 2-3k. 3) At next change used Lubro Moly Engine clean for about 125 miles and then changed oil to Lubro Moly HydroCrack oil. Engine is quieter, idles more smoothly and noise is rarely there.
1986 300E Anthracite + ECodes + MB Mileage Award
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Old 07-12-2002, 01:40 AM
WRM WRM is offline
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91 300 ce came with the 104 engine that had 2 overhead cams.
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Old 07-12-2002, 02:07 PM
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Join Date: Sep 2000
Location: Sherman Oaks, CA
Posts: 4,748
the lifters are hydraulic if I am not mistaken.

Mine does the same thing for a couple of seconds at first cold start. My mech and I have discussed it, and it appears when it has been sitting, they stick for a second until oil pressure builds up.

Not sure if this is the same issue you are having, but I am not too worried about it on mine as the sound goes away after a few seconds once my oil pressure is up.

'92 300CE - Sold
2004 C240 - C7 Wheels - Android Radio
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.
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