Re: IML: B/RB Valve Covers-leaks ?

["A. Foster" <monkeypuzzle1@xxxxxxx>]

Hi;
  I wouldn't say that they have a poor record of leakage on the B/RB engines
but with cork gaskets they do leak when they get old. I think that Mike
Becker is right in that it does have something to do with the heat from the
exhaust manifolds cooking the cork, that's why silicone is an improvement in
that it is more heat resistant. However, back when my Newport was built, and
most of the Imperials on this list, silicone was unheard of so the oil drip
did happen at some point.
  Lets face it, the valve covers are stamped steel, hardly the ideal surface
for sealing since they distort very easily from bolt tightening. I have
noticed that one of the common upgrades on these engines is to go with cast
aluminum covers, perhaps they are better to go with if you need to remove
and install them to adjust valve lash and the like. It is probably for that
purpose that the silicone gasket are on the market otherwise just a tube of
RTV would suffice.
Best Regards
Arran Foster
1954 Imperial Newport
Needs all gaskets replaced on rebuild and a left side tailight bezel.
1975 Chrysler Newport
Needs the right side valve cover gasket replaced along with the valve guide
seals.
----- Original Message ----- 
From: <staffel@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Friday, December 16, 2005 10:02 PM
Subject: IML: B/RB Valve Covers-leaks ?


Just to report I have NO valve cover leaks from my 413, and I've put 1,978
miles on the Imperial this year, much in 300-700 mile one day trips. I also
have no leaks from the valve covers on my 440 in the Jensen Interceptor. On
the Jensen, I do have a slight weep from the valley pan seal up front with
brisk braking, but only in the hot summer temps. I've never heard that the
R/RB engines have a 'history' of poor valve cover seals with proper
installation. I would recommend using RTV top & bottom if the seals are not
upgraded silicon.

Sherman Taffel
COlumbia MD


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