I seem to have a lot of pressure under my valve cover (filler cap & cover gasket seeping oil). I was wondering if that could be a clogged EGR valve. Thanks, Bill. Sorry, its an 85 300d turbo, 170K miles.

EGR is an emission device connecting the exhaust to the intake and would have nothing to do with exsessive crankcase pressure. Maybe its just time for a new oil cap and valve cover gasket?

__________________
'83 300D 198,000mi Howard
'03 Saturn Vue CVT 75,000mi(wifeys)

Check the CCV (Crank case ventilation) lines running from the valve cover to the air filter housing.

__________________
"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

Current
Monika '74 450 SL
BrownHilda '79 280SL
FoxyCleopatra '99 Chevy Suburban
Scarlett 2014 Jeep Cherokee
Krystal 2004 Volvo S60
Gone
'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf ‘86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'92 Subaru
'96 Impala SS
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad

Replace the oil cap and valve cover gaskets.

or, see my recent post:

Oil Vapor Getting Past Filler Cap

__________________
327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...