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TC Tappet cover gasket
Posted: Wed Oct 17, 2001 8:01 pm
by Charles Hill
I got my '49 TC back together again after replacing the clutch.
Everything works fine. The clutch works better than it ever did
before. I now suspect it was bad when I bought the car. I don't have
any other TC driving experience to compare so I didn't know. It now has
a much lighter pedal and the whole "feel" is much better.
While everything was out, I decided to fix a few other things. I took
of the cast aftermarket valve and tappet covers and put on the original
stamped steel pieces. I have a question about installing the tappet
cover. The gasket I bought from MOSS is the same as the one that was on
the car. The gasket covers the whole area of the tappet galley with 4
vent holes. The only problem is that it seems like the gasket blocks
off the road vent tube. It seems to me that if the road vent tube is
restricted, crankcase pressure would be able to build up and agrivate
any existing oil leak problems. Should I cut the gasket to clear the
vent tube? I would appreciate any comments/suggestions.
Regards,
Charles Hill
Re: TC Tappet cover gasket
Posted: Wed Oct 17, 2001 8:25 pm
by Chip Old
On Wed, 17 Oct 2001, Charles Hill wrote:
> While everything was out, I decided to fix a few other things. I took
> of the cast aftermarket valve and tappet covers and put on the
> original stamped steel pieces. I have a question about installing the
> tappet cover. The gasket I bought from MOSS is the same as the one
> that was on the car. The gasket covers the whole area of the tappet
> galley with 4 vent holes. The only problem is that it seems like the
> gasket blocks off the road vent tube. It seems to me that if the road
> vent tube is restricted, crankcase pressure would be able to build up
> and agrivate any existing oil leak problems. Should I cut the gasket
> to clear the vent tube? I would appreciate any comments/suggestions.
Use the gasket as is. It acts as a baffle between the tappet chamber and
the breather. Without it you'll lose oil out the breather tube at a rapid
rate.
--
Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO CT3479E
fold@bcpl.net
Re: TC Tappet cover gasket
Posted: Thu Oct 18, 2001 5:27 am
by Robert Grunau
I agree with Chip. The four vent holes in the gasket allow the block to vent
to the outside of the gasket and therefore indirectly to the vent tube. A
small projection on inside end of the vent tube keeps the gasket from
plugging the opening. A direct hole in the gasket will encouage oil leaking
out the vent.
Bob
On Wed, 17 Oct 2001, Charles Hill wrote:
> While everything was out, I decided to fix a few other things. I took
> of the cast aftermarket valve and tappet covers and put on the
> original stamped steel pieces. I have a question about installing the
> tappet cover. The gasket I bought from MOSS is the same as the one
> that was on the car. The gasket covers the whole area of the tappet
> galley with 4 vent holes. The only problem is that it seems like the
> gasket blocks off the road vent tube. It seems to me that if the road
> vent tube is restricted, crankcase pressure would be able to build up
> and agrivate any existing oil leak problems. Should I cut the gasket
> to clear the vent tube? I would appreciate any comments/suggestions.
Use the gasket as is. It acts as a baffle between the tappet chamber and
the breather. Without it you'll lose oil out the breather tube at a rapid
rate.
--
Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO CT3479E
fold@bcpl.net
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