Cork or rubber?
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Cork or rubber?
I fitted new heads a couple of years ago, and naturally new gaskets. Used rubber ones for the rocker covers - with the steel inserts for the screws. Think they came from Rimmer.
One of them is leaking badly. The screws are still tight. Now cork gaskets didn't last forever, but definitely longer than this one has.
The engine is a bit worn and has some blowby - but still goes very well indeed and is quiet, so I'd like to put off the inevitable re-build for as long as possible.
One of them is leaking badly. The screws are still tight. Now cork gaskets didn't last forever, but definitely longer than this one has.
The engine is a bit worn and has some blowby - but still goes very well indeed and is quiet, so I'd like to put off the inevitable re-build for as long as possible.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: Cork or rubber?
I used one set of cork gaskets from 2006 to 2014. As you know my engines came apart almost monthly while I was racing. The trick is to make sure the rocker cover mating face is oil free and dry. Also make sure you give the cork gaskets a clean with thinners etc to make sure they are clean and dry. Then apply a thin layer of Evo Stick to the rocker cover mating face as well as one side of the gasket. Make sure that you apply enough Evo Stick to cover all of the mating faces.DaveEFI wrote:I fitted new heads a couple of years ago, and naturally new gaskets. Used rubber ones for the rocker covers - with the steel inserts for the screws. Think they came from Rimmer.
One of them is leaking badly. The screws are still tight. Now cork gaskets didn't last forever, but definitely longer than this one has.
The engine is a bit worn and has some blowby - but still goes very well indeed and is quiet, so I'd like to put off the inevitable re-build for as long as possible.
Then set the cork gaskets in place on the rocker covers and set the rocker covers down on a flat surface and stick a weight on top. I normally use a couple of bricks. Leave the gaskets to set for 24 hours in the house.
This will see the gaskets firmly bonded to the rocker covers so they wont move when tightened. Then make sure that the mating face on the head is oil free.
This is where you have a few options!!
You can fit the rocker covers dry OR fit the rocker covers with Blue Hylomar smeared on the gaskets OR use an RTV sealant on the gaskets.
The idea is to have the gaskets stuck like poo to a blanket on the rocker covers but also to have a breakable seal between gaskets and heads
Perry
Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
I tried rubber once and didnt like it.
So Cork rules for me
So Cork rules for me
Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
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