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-   -   103 valve stem seals - how difficult to do? (http://www.peachparts.com/shopforum/tech-help/221902-103-valve-stem-seals-how-difficult-do.html)

yambrovich 05-10-2008 05:21 PM

103 valve stem seals - how difficult to do?
 
I need to replace the valve stem seals on my '89 300E with 103 engine. Parts (Fastlane) less than $50. How difficult is this to do?
Can an owner with medium mechanical skills do this at home with hand tools?

Any help will be appreciated. THANKS

pmpski_1 05-10-2008 08:47 PM

I assisted my Father in Law with the valve stem seals about 6 years ago. I wouldn't have done it on my own then, but I would probably give it a shot now - I'd say I'm about medium skill level for a non professional.

He had a Mercedes valve spring compressor that made the job straight forward. I don't know if a regular valve spring compressor will work, but you will need one. It's at the top of this pic:

http://farm1.static.flickr.com/27/64...847fa0.jpg?v=0

Sorry, this is one of the only pics I have of it and I didn't take any pics with it in use. I don't know the part number either.

Also, I don't remember how we kept the valves from dropping into the cylinders when we did this, but we probably used an air compressor.

If you get the valve spring compressor, I'd say go for it. Just make sure you review the instructions, be patient, take it slow, and don't plan on needing the car for a few days in case you run into problems.

Hit Man X 05-11-2008 12:15 AM

Simple as can be. Go with OEM seals and get a new cover gasket. Also I'd replace any rubber and the temp/fan senders while it's apart. Good time for upper timing cover seal too as they usually leak.

I did mine in a few hours.

Texholdem 05-11-2008 10:52 AM

Check out the DIY

http://www.peachparts.com/Wikka/M103ValveSeals

gmercoleza 05-11-2008 08:48 PM

Very easy job. Do a search - there is a non-MBZ coil spring compressor that can be used with adequate results. I think it's made by Lisle and available at Pep Boys...


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