m103 Valve stem seals replacement

[lanny]

Hi guys.i just did my valve stem seals replacement thanks to" RON IN SC" on start up everything was fine until i drove the car. smoking like crazy and it was not before just using about 2 qts.oil every 500mls,i did notice the seals were all the same color (brown) so i installed them anyway.Is there anything i should have done during installation.thanks for your advice.

[lee polowczuk]

Originally Posted by lanny

Hi guys.i just did my valve stem seals replacement thanks to" RON IN SC" on start up everything was fine until i drove the car. smoking like crazy and it was not before just using about 2 qts.oil every 500mls,i did notice the seals were all the same color (brown) so i installed them anyway.Is there anything i should have done during installation.thanks for your advice.

there are seals for the intake and seals for the exhaust..they look like each other but are not identical.... i guess they could be all brown..but are different.. i would have to pull a spare set to see the difference.

[lanny]

Hi lee, i am awaiting your reply to this dilemma i"m facing.

[gschira]

The difference is in the hole. In the set I used, they all, at first glance appeared the same, all brown.
But half have bigger diameter holes for the bigger dia EX valve stems and half have the smaller diameter for the IN valve stems. You might have put some or quite possibly all the bigger dia. ones on the intake valves. They will leak, not being tight enough to seal......

[lanny]

thanks a lot GSCHIRA.thats probably what happened, will do the fix later this week.

[lanny]

Thanks gschira,today i decided to go for it and check all the valves.as you stated there were ex.seals on int. valves and vice-versa.I installed the seals as they are supposed to and she started and idled for a while.tomorrow i will go a test drive to see if she no longer blows smoke.Will let you know the outcome..

[lee polowczuk]

Originally Posted by lanny

Thanks gschira,today i decided to go for it and check all the valves.as you stated there were ex.seals on int. valves and vice-versa.I installed the seals as they are supposed to and she started and idled for a while.tomorrow i will go a test drive to see if she no longer blows smoke.Will let you know the outcome..

i just looked at my spare pack... flat for intake , cone for exhaust

https://www.**********.com/search/product.aspx?sid=luesmt45ao34h4yaafamyn2f&makeid=800016@Mercedes&modelid=1193600@300CE&year=1989&cid=valve@valve&gid=5504@Valve%20Stem%20Seal%20Set

[sptt]

Curious...how hard was it to replace the seals? Also...would you / did you have external leaks from the old seals or was it just burning through oil?

[JohnM.]

Originally Posted by sptt

did you have external leaks from the old seals or was it just burning through oil?

Same thing.

If the valve seals are leaking, that means oil is going into the combustion chamber.

[ps2cho]

Here is the difference vs removed:

[sptt]

ps2cho...I'm sure I need to do this. How hard is it and what tools did you use? Also, would these cause any type of leak at the headgasket if they are bad?

[lee polowczuk]

Originally Posted by sptt

ps2cho...I'm sure I need to do this. How hard is it and what tools did you use? Also, would these cause any type of leak at the headgasket if they are bad?

has nothing to do with the headgasket.


ideally you need an air compressor... an attachment that screws into the cylinder...and the correct spring compressor...

i never had the correct spring compressor....and never got a set of seals on the cylinder next to the firewall... the next time i do this.... it will be with the correct spring compressor.

do a search.... you should find the answers

oh..and some magnetic hands to catch some pieces on the spring....

there are pictures out there....

i am sure a pro could do it in two hours.... i do it painstakingly..and it took me about 5... and that was doing 10 or 11 seals...not all 12

[ps2cho]

This is the tool type I used and it allows you the ability to do the 6th cylinder.

[lee polowczuk]

Originally Posted by ps2cho

This is the tool type I used and it allows you the ability to do the 6th cylinder.

is that a rent a tool ....or do you own it.?

[dennish]

I used a cheap spring compressor from NAPA. No problem with clearance on #6 cylinder on 190E. I think on some other models of MB there's a problem with clearance using some cheap valve spring compressors on that cylinder.