OK I'll stick it out there. I think this is the wrong product and type of product for this application.. Head surfaces need to be mated as well as can be. This putty may be ok for a water cooled system but it's just too darn hot for this gasket maker stuff.Dkt26 said:So does anyone have an opinion on yamabond for pushrods tunnels when using copper gasket? Can it handle the heat etc?????
Matt Spencer said:This rubbish works well as joint sealant . Not much luck as glue though .
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Saw a BSA A65 again , GUD splattered on the Oil Mist now . didnt hold 6 months .
Steam Pipe jointing paper for custom gaskets ( though a decale cutter should hack it these days )
had one real clean BSA centuries ago . Only fuel drop stains on top of the case from the concentrics.
The back road dust otherwise undampened over or under .
The PLIOBOND was the choice of universal motorcycles . and theyre still around . Even sold it AS sealant .
Matt Spencer said:This rubbish works well as joint sealant . Not much luck as glue though .
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Saw a BSA A65 again , GUD splattered on the Oil Mist now . didnt hold 6 months .
Steam Pipe jointing paper for custom gaskets ( though a decale cutter should hack it these days )
had one real clean BSA centuries ago . Only fuel drop stains on top of the case from the concentrics.
The back road dust otherwise undampened over or under .
The PLIOBOND was the choice of universal motorcycles . and theyre still around . Even sold it AS sealant .
pete.v said:OK I'll stick it out there. I think this is the wrong product and type of product for this application.. Head surfaces need to be mated as well as can be. This putty may be ok for a water cooled system but it's just too darn hot for this gasket maker stuff.Dkt26 said:So does anyone have an opinion on yamabond for pushrods tunnels when using copper gasket? Can it handle the heat etc?????
It my contention to get the surfaces flat, as in purely flat (lapped). Add a nice soft copper gasket sprayed on both sides with 2 coats of copper spray(don't glob it on there, nice coats) and follow torqueing procedures to the letter. This is what works for me. Do not assume, and do not take this procedure for granted. If you use due diligence, it will hold. If the surfaces are not perfect to begin with, nothing will work for very long.
Since nobody decided to chime in (pussies), I will now leave the door open for the critics.
Dkt26 said:[Cheers Pete. I had concerns bout heat as well but wasn't sure.
B+Bogus said:I've had a Wellseal failure on my 850 barrel flange due to the PCV connection coming off, so I tried getting some Yamabond.
Nearest stockist - USA!
Checking the internet it seems the consensus is Threebond 1104 is the same product, they supply quite a few OEMs, including Norton.
I've got some on order.
Dkt26 said:What about yamabond on pushrods tunnels when using copper head gaskets?
Dkt26 said:If you use copper wire both sides then that is an extra 10thou added to. A 21 thou copper gasket meaning at some locations on the gasket you would have 31thou and others 21thou. I understand that the copper wire will compress somewhat but isn't the key to using copper to have the surfaces absolutely straight, flat etcetera?
phil yates said:Dkt26 said:If you use copper wire both sides then that is an extra 10thou added to. A 21 thou copper gasket meaning at some locations on the gasket you would have 31thou and others 21thou. I understand that the copper wire will compress somewhat but isn't the key to using copper to have the surfaces absolutely straight, flat etcetera?
I don't think it would work for Dk's requirements but Loctite No 3 is doing a great job under my inner rocker spindle gasket which split a week ago. I tested it yesterday morning taking Mary from next door for high tea at Craigiburn. Going to 7000rpm in all gears but top we got there very quickly and not a spot of oil to be seen. Mary refused to be in the photo because she had left her teeth at home and was still in her pyjamas.
Phil
jseng1 said:Dkt26 said:What about yamabond on pushrods tunnels when using copper head gaskets?
No - won't work
Use only contact cement and .005" copper wire (also around oil return hole)
Fast Eddie said:Hi Jim, what exactly do you mean by 'contact cement'? Can you give me a brand name, so I can ensure I get the right stuff?