This article is from the Chrysler-Plymouth-Dodge FAQ, by Dr. David Zatz with numerous contributions by others.
** 2.2 and 2.5 liter engines only **
Lemon-Aid Used Car Guide: "1989-93... cylinder head and oil pan gaskets are
prone to leaking." ... "1990-91 - Owners can get a new cylinder head gasket
cover on models with 2.2L and 2.5L engines." (Jim Hoare)
firstname.lastname@example.org wrote of p/n 4773193, a new valve cover (1994?) which
forms a superior seal on 2.5 engines, maybe 2.2s too. If anyone actually
gets Chrysler to buy them one, let me know. Chances are you're on your own.
Bob Meyer <email@example.com> says: The valve covers on
emission-controlled cars are vented through the inlet hose from the air
cleaner to the valve cover and the PCV valve from the valve cover to the
throttle body/intake manifold. If you are having a problem with valve
cover oil leaks, then you should check whether these hoses, or the small
crankcase air filters in the air cleaner, are blocked first before you
reseal the valve cover.
Around 1987, Chrysler switched from using a gasket to using RTV.
In 1994, they switched to a 1 piece valve cover from a 3 piece cover.
Mike Manning informs us that recall #467, issued in 1990, covers the valve
cover gasket; he says that the gasket was replaced with blue goo. Once this
stuff has set up, the cover needs to be re-tightened. We don't think the
dealers usually do it correctly. Mike finally replaced his with a cork
This is a known problem but reps deny it; the situation calls for
assertiveness. Keep checking your engine, especially around the spark plug
area, for seeping oil. Ask that your engine be cleaned every time the
dealer fixes the seepage. If your car is out of warranty, try to have the
seepage fixed anyway. (New advice: on second thought, just do it yourself,
which is easier).
Paul F. Schikora : Went to NAPA and got a gasket set and a bottle of gasket
goo (orange colored stuff). Took my time cleaning the surfaces completely
and applied the gasket & goo per instructions. No more leak. However, I'm
sorry I didn't take the time to reseal the PCV connection cover. It's
always bled quite a bit of oil into the valve and air filter. (Note: this
was for 1987 model, which had a gasket).
JoDee McKenney says: I'd use the gaskets and the high temp silicone on each
of the metal surfaces. This allows a way to seal the parts together and
still get them apart later.
Daniel Stern warns: DO NOT DO THIS on an engine with mechanical lifters
(i.e G/RG engines and early V8s) because there will be hell to pay when it
comes time to adjust the tappet clearance.
Duane P Mantick provides TSB 09-17-89 which advises replacing the original
cover with one using RTV. The "cylinder head cover kit" is PN 5241066 and
contains the cover, five screws, 2 end seals, four studs, but not RTV
sealer PN 6500435. This TSB applies to "1989-1990 all domestic vehicles
with 2.2L or 2.5L EFI engines"
Michael J. Challis <firstname.lastname@example.org>, a Chrysler Master Tech, wrote that
Mopar RTV silicon works well: "The trick to this stuff is to have a clean
surface. Use brake parts cleaner to remove oil so you have a dry surface
for the RTV to bond to."