Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 06-28-2001, 02:57 PM
Registered User
Join Date: Jun 2001
Location: California
Posts: 327
I have a 1990 300E (160K miles) that is using about 1 quart of oil every 1,000 miles. There are no drips, so I know it's either valve stem seals or rings. The dry/wet compression test tells me it's bad seals. Also, the car passed the smog test marginally with the max allowable HC, so I know I need to get on top of this.

I have the mechanical abilities to change the seals myself, but I'm trying to get as prepared as possible before I dig in to it. I plan to modify an old spark plug to hook the air hose up and change seals one cylinder at a time (with the head on). I have the manual, but it does not do a very good job of illustrating the step-by-step process.

Do I need any special tools to compress the valve springs, or is a universal lever-type compressor adequate?

Can anyone provide some guidance and advice?


Reply With Quote
Old 06-28-2001, 08:52 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
You may use the old lever style, however, I have found that a screw type such as the Blue-Point works the best.

Be sure when you take off the bearing/caps, to catch the valve shims on top of the valve springs with a small magnet. Then put them in the correct order.

Also, before you hook up the air, you may want to rap on the top of the spring holder with a brass hammer to loosen it.
Donnie Drummonds
Reply With Quote
Old 06-28-2001, 08:58 PM
Registered User
Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
I don't know if you can get a spring compressor here at Parts Shop. You might ask. I know Performance Products sells one http://WWW.************************ , but it's a bit pricey. Depending on the universal you buy, it may or may not work. You may have to specify one that is compatible with overhead cam setups. The ones for pushrod setups usually don't work.
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.
Reply With Quote
Old 06-28-2001, 11:17 PM
Posts: n/a

No matter what I do, my car won't
down shift at 60 mph and above.
Is there a technique?Pls.advise.
Reply With Quote
Old 06-28-2001, 11:20 PM
Posts: n/a
Sorry pushed the wrong button.
Reply With Quote
Old 06-29-2001, 01:22 PM
Registered User
Join Date: Jun 2001
Location: California
Posts: 327
Thanks for the help guys. I'll start shopping for the spring removal tool. I don't think it will be too bad of a job, but I was just looking for a sanity check. If it turned out that a bunch of special tools were required, or if a bunch of horror stories came up, then I'd have to take a harder look at it.

Thanks again!
Reply With Quote
Old 06-29-2001, 06:26 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,441
Pep Boys (in CA) sells a compressor to spark plug hole adapter for something like $7.

91 300SE
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wagon rear suspension valve rebuild lrg Diesel Discussion 11 10-04-2006 07:02 AM
300E - Persistent camshaft seal leak - Opinions? Zeus Tech Help 17 09-14-2004 03:00 PM
Valve cover gasket replacement 95 E320. 71Rcode Tech Help 0 03-10-2004 09:44 PM
do I need a new idle control valve on 300E????? WANT '71 280SEL Tech Help 1 06-12-2003 10:45 AM
Heater Control Valve Mystery 190 E 2.6 JDUB Tech Help 1 08-27-2000 10:28 PM

All times are GMT -4. The time now is 12:10 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page