hi im after some advice the half moon seals were weaping quite baddly on my cossie so i fitted a cometic rocker gasket and new half moons, now the half moons are leaking even worse can anyone reckomend a good sealant i can use?

 

I've always used Hylomar blue sealant!

 

its not so much the sealant but where you put it. when u put the gasket down make sure its is a nice fit into the corners of the front cam bearing housings, then apply a blob of sealant to the corners and then put the half moon seals in place.
tighten down the cam cover evenly and watch the half moon seals compress. dont over tighten the cover as the gasket will spread. a good nip when they are tight will do.

if its still leaking it is possible that the oil could be comming from under the corner of the cam housings themselves, if they were off at any stage it is possible that there was no sealant placed under their base and unless its was done oil will seep out big time. it important that this is done.its specified in the workshop manual, and it did my head in (as in brain) a good while back

 

thanks will look in that some more

 

join the game, i did mine a few time for leaking oil, and it still leaks now!

 

No reason for any leaks here, as said the underside of front caps is a fave place, as are the cam seals themselves, VITON is best here, for sealant use Loctite 5900 or 5910, masses better than hylomar, but a LOT costlier.
tabetha

 

Sorted

 

hi mate put sealer where mentioned above but dont use the sealer they have said! use, 3 bond part no. is 1216e. this is the only stuff that has worked on mine! i bought my escos off guzzler and he put it on there and its the only cossie that ive ever seen that doesnt leak at this point. i atempted 4 times on my old saph to stop the leak and never could..

 

As velocity said... ensure the front cam caps themselves have sealant on the head mating faces too. I've heard of a few people going mad on replacing the half moons when it was the caps that didn't have any sealant!