AQUAR
30-08-2015, 07:20 PM
In an earlier thread I mentioned my Magna TP was leaking a fair bit of oil at the half moon seal.
Today I pulled the rocker cover of the engine and found the half moon seal to be as hard as rock (not surprising therefore that it was leaking like a sift!).
The gasket was also hard and definitely not reusable.
http://i.imgur.com/3CuzBSY.jpg
What did surprise me was that the rocker cover had a silicon bead in the bottom of the gasket slot. It was a very neat bead but some of it lifted and broke away whilst cleaning the cover.
http://i.imgur.com/HP9tgmh.jpg
Could this silicon bead be an original factory seal for mating to the gasket?
Or is this a bodgie that was done to re-use an old gasket?
I asked the mechanic down the road and he believes I should not use any sealant except at the half moon seal (as per coldamus advice) and in the corners of the camshaft seals.
Since this silicon bead was damaged I had to removed it all from the slot anyway.
But the dilemma now is "should I create a new silicon bead or just use the gasket without this silicon bead".
Has anyone come across this silicon bead in the Astron II rocker cover gasket slot before?
Personally I can't see why the silicon bead is needed.
So - to bead or not to bead????
Today I pulled the rocker cover of the engine and found the half moon seal to be as hard as rock (not surprising therefore that it was leaking like a sift!).
The gasket was also hard and definitely not reusable.
http://i.imgur.com/3CuzBSY.jpg
What did surprise me was that the rocker cover had a silicon bead in the bottom of the gasket slot. It was a very neat bead but some of it lifted and broke away whilst cleaning the cover.
http://i.imgur.com/HP9tgmh.jpg
Could this silicon bead be an original factory seal for mating to the gasket?
Or is this a bodgie that was done to re-use an old gasket?
I asked the mechanic down the road and he believes I should not use any sealant except at the half moon seal (as per coldamus advice) and in the corners of the camshaft seals.
Since this silicon bead was damaged I had to removed it all from the slot anyway.
But the dilemma now is "should I create a new silicon bead or just use the gasket without this silicon bead".
Has anyone come across this silicon bead in the Astron II rocker cover gasket slot before?
Personally I can't see why the silicon bead is needed.
So - to bead or not to bead????