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Valve Cover Stuck

6K views 28 replies 6 participants last post by  Woolly 
#1 ·
Replacing the valve cover gasket on SLK 320. Have all of the bolt removed, even removed the plug wires to see if that would give me enough room to wiggle the cover out. No such luck. Do not want to keep banging the cover on the engine parts, that is not a good solution.

What is this (circled in blue)? Can it be removed? If so what issues will it cause? If not, how do you get the valve cover off? Thanks for the help
 

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#8 ·
Ok, that seems to be the fuel distributor line. You need to disconnect the battery!!!!!! Follow the line it's attached to and there should be a plastic cap on the end (towards the front of the engine). There's a tire-like valve inside, used to release the pressure from the system! There might be a little bit of fuel so use some container. Some PDFs are compiling.
 
#9 ·
Ok, here's the information I was able to pull out from the Workshop manual.
If you take your pictures along the way we'll highly appreciate it!!! and then create a DIY thread?! :tu:
 

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#13 ·
Great news. You guys have been wonderful. Problem now is that I cannot get the breather cover off. While it is leaking like a sieve, it will not come loose. No wiggle, no give, no nothing. I tried dental floss. I can get it in the places where the leaks are but no go everywhere else.
 
#14 ·
Breather Cover will not budge. Help

I have removed all of the breather cover screws and the Valve Cover Bolts. My breather cover is leaking a vast amount of oil but I cannot get it to budge so that I can re-do the seal. You are not supposed to hit the cover with an object to get it free and you are not supposed to use sharp objects to pry it apart. I have used a razor blade to very carefully remove the excess seal that squeezed out from the last time it was sealed and I have tried dental floss. No luck with either. They are solid like they are still screwed together.

Anyone else have this issue? Any help on how to get this separated from valve cover?
 
#21 ·
To update you guys on the latest...Found two silicone gasket dissolvers on-line. Neither of which get over 2 stars. Great for removing everything but the RTV silicone gasket.

1)I called local MB mechanic, he says "We just wiggle them until they come off". Will that is not going to happen because there is no play in the cover at all. It is like it is cemented on.
2)Called MB Dealership to find the Solvent. Parts guy could not find anything in the system. So he spoke to the shop guys. They said they just use brake cleaner and not to use anything abrasive because it will damage the cover. Did some research online, does not seem like there is anything in brake cleaner that would dissolve the silicone. Anyone else have any luck using brake cleaner to remove the old gasket? I am hesitant to use the brake cleaner since I know there are a few places where I have been able to get the old gasket out so I do not want to risk getting brake cleaner inside the cover then not be able to remove the cover to clean out the foreign cleaner.
3)Called AutohausAZ to see if they have the entire cover for sale to see how much it would cost to replace the whole cover. They do not carry the cover. Asked the guy from Autohaus if they had a product to dissolve the silicone. He said no. It is meant to be permanent and to withstand heat and all sorts of chemicals, so there is not anything out there that will dissolve them.

So short of some miracle cure that is really elusive, I have two choices. One is replace the entire cover or it was suggested to me to seal around the entire outside of the breather cover.

Anyone else try sealing around the outside of the cover before?:confused:
 
#22 ·
Sounds like someone did a very "good" job sealing the valve cover...
Maybe try this product?

http://www.victorreinz.com/EN/Products/Sealing-compounds/RE-MOVE.aspx
http://www.industryarea.com/Liquid-sealing-compounds-Y2440-S7-catalogue.html

If it says it removes their sealant "REINZOSILis a solvent-free, permanently elastic, fast-hardening silicon sealing compound"
http://www.victorreinz.com/EN/Products/Sealing-compounds/REINZOSIL-and-REINZOPLAST.aspx
then perhaps you should give it a try? ;)
http://www.victorreinz.com/EN/Products/Sealing-compounds/REINZOSIL-and-REINZOPLAST.aspx
 
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