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  #1  
Old 01-29-2018, 10:50 AM
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Oil filler cap 1982 380sl

My oil filler cap (on valve cover) won’t budge when I try to remove it. I don’t want to blindly force it with slip-joint pliers, unless I know it won’t damage anything. Is there maybe a push and turn, adult-proof trick? Please advise.
Thank you.


Last edited by exsailor66; 01-29-2018 at 11:30 AM.
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  #2  
Old 01-29-2018, 11:56 AM
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no tricks. i've a few of these i work on that require channel locks to loosen. good luck, chuck.
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Old 01-29-2018, 12:38 PM
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The oil cap on my 300SE can be very hard to remove, occasionally I have to use a tool to loosen it.
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Old 01-30-2018, 01:37 AM
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Thanks...Iílll use my channel-locks on it. I just didnít want to break anything.
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Old 01-30-2018, 03:52 AM
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exsailor66, recommend placing a rag over the filler cap instead of having the slip-joint pliers contact the filler cap directly, or wrap duct tape around the slip-joint plier jaws; otherwise you are going to gouge the surface. I position a 3/4" square dowel about 30" long on the right side of the filler cap flat and give it a rap with the heel of my hand to loosen it.
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Old 01-31-2018, 01:58 AM
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Dunno if it's compatible with the old V8 but...

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Old 01-31-2018, 09:12 AM
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The modern "high profile" caps used on the newer cars still fits the old cars. I think Mercedes has only ever used 1 oil fill cap design. I have the new one on both the SL and the SDL. The higher handle makes it a lot easier to get off and it doesn't leak.
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Old 01-31-2018, 12:25 PM
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VW/Audi caps are yet another option. Easy to grab and turn and seal well.

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  #9  
Old 01-31-2018, 05:39 PM
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When removing the cap with tools, apply steady even pressure and let the rubber seal slide along the filler neck. ( this also goes for stuck oil filters ) The seal will only move so fast and pushing very hard just leads to something breaking / slipping off.
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  #10  
Old 02-11-2018, 03:03 AM
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Thanks all.
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  #11  
Old 02-11-2018, 08:34 AM
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Try a strap wrench - it won't leave any tooth marks.

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