PeachParts Mercedes-Benz Forum - View Single Post - Valve Stem Seals on '95 S350

oldsouth · #4 04-28-2004, 10:23 PM

Great information gsxr! I am not getting any blue smoke, only blowby out of the pipe coming out of the valve cover. Oil comsumption has gone up from 2 quarts in 3500 miles to 2 quarts in 2500 miles. Car is idleing rough and I think it is the injectors but other than idle it runs great. I need to get back with the dealer but the mechanic said he don't think they have the tools to do the job and would probably take the head off and send it to a head shop. I don't like paying Mercedes prices for someone else to do the work. I know a good Mercedes mechanic than I can get to work on the car at my home if I can keep him off of crack long enough. He don't have any special tools though. I am not for sure if I even need valve seals. I am definately replacing the injectors though and will do a compression test. Wouldn't a leakdown test tell me about the valve seals? Exactly how does one do a leakdown test? After compression, see how long it takes to leak the pressure off? I see nothing in my Alldata service manual about leakdown tests.