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500 top end rebuild
Posted: Fri Jul 10, 2015 9:21 am
by pd110961
I'm expecting the cylinder head back soon after having a new exhaust valve seat inserted. I have a gasket set from our hosts, with the copper head gasket etc. I know the torque values too.. my main question is do you all recommend the use of a gasket sealant like blue hylomar or similar for the assembly?
500 top end rebuild
Posted: Fri Jul 10, 2015 7:28 pm
by wilf
I changed my head gasket recently, (first time attempting anything major). I used one of our hosts composite gaskets with a smear of blue hylomar for good measure. Done a good few miles since and all is well.
500 top end rebuild
Posted: Sat Jul 11, 2015 6:28 am
by Nettshubby
I used a copper gasket on a rebuild and got an oil weep from the pushrod side, reassembled with RTV silicone and all ok. Our hosts recommend sealant woth copper gaskests, but not with composite.
500 top end rebuild
Posted: Sat Jul 11, 2015 11:18 am
by PeteF
I like a smear of Wellseal
500 top end rebuild
Posted: Sat Jul 11, 2015 12:47 pm
by Nettshubby
I back that up, Pete, use Wellseal on every other joint, have done for years on all my bikes.
500 top end rebuild
Posted: Thu Jul 16, 2015 10:06 am
by pd110961
I had a great service from Mansfield Engine Centre.. they stipped the exhaust valve out, machined a new seat from blank material, ground in the valve etc, vacuum tested for a good seal for £66 all in!