Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: McCabe-Thiele (Ted) on October 06, 2020, 10:20:14 AM
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Im wondering what gasket adhesive (if any) members us when assembling stuff like clutch covers, engine halves, barrells etc - obviously not including head gaskets.
Back in the day on mini engines it was just clear grease or for the likes of my old Triumph 21 back in the 1960's Red Hematite (that never cured the oil leak for more than 10 days).
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Honda Bond ( the lightest, lightest smear) for the crank case halves but all gaskets either fit dry, or the lightest smear of grease, not head or base gaskets though.
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Hondabond at £20 and Hylomar at £5 I would be interested to hear who else uses Hylomar. Thanks for that Oddjob
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I gather genuine Honda gaskets need no goo.
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I'd certainly not argue about Hondabond, it is the original "fit" for crankcase joint etc, so it'll not be wrong.
But, Hylomar is easily a substitute for any metal to metal joints and any gasket you want to use it on. As already said you have to use it veeeeeeery sparingly so that effectively nill excess is expelled.
You just don't want ANY excess floating around or squeezing into oil ways as a prerequisite.
I've used Hylomar on gaskets but ideally from an aerosol spray so that it's an absolutely fine coating, it's particularly effective on 750 F2 head gaskets which are often "ahem" troublesome :)
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Wipe some on then wipe it off again.
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Agree with Oddjob, I have used blue Hylomar for many years in both engineering industry as well as bikes, used to be known as Rolls Royce jointing compound.
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When I regularly worked on engines Blue Hylomar was my favourite, but on Honda motors only on metal to metal as Julie has already said.
Cheers
Dennis
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Anybody use Wellseal? There seems to be fors and againsts compared to Hylomar on other bike and car forums. I'm sitting on the fence.
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Anybody use Wellseal? There seems to be fors and againsts compared to Hylomar on other bike and car forums. I'm sitting on the fence.
I used a sealant in the olden days that was a thin light brown coloured compound that was slow to dry out - the name Wellseal sounds distantly familiar.
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for the likes of my old Triumph 21 back in the 1960's Red Hermatite (that never cured the oil leak for more than 10 days).
That brings back horrific memories of old Brit bike engines, and my hands, plastered with the stuff. It was a beggar to get off, and made my hands look like a serial killer's. I still can remember the smell too, somewhere between fresh bread and Plasticine.
I eventually fell for the Rolls Royce hype and used Hylomar, but probably too much and trying to compensate for leaks caused by things like chain case screws that went into holes with stripped threads etc... I used to take great pride in having a T140V that didn't leak oil though (until it did).
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Wellseal NO it hardens, Hylomar people put on way to thick and it bungs up oil ways, Hermetite whatever colour dont swear on here please, silicone NO WAY NO HOW,
Hondabond, Yamabond, Threebond yes used VERY sparingly, a tiny tube will do more than one engine.
Paper gaskets you can use clean grease but nothing else and definitely NOWT on head gasket but if possible get a Honda one which is pre stickyed in the relevant places.
There is one point that Hondaman on the US site makes and that is that since asbestos has been removed gaskets are thicker so the theory is you need thicker O rings in the gasket to get the same seal
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for the likes of my old Triumph 21 back in the 1960's Red Hermatite (that never cured the oil leak for more than 10 days).
That brings back horrific memories of old Brit bike engines, and my hands, plastered with the stuff. It was a beggar to get off, and made my hands look like a serial killer's. I still can remember the smell too, somewhere between fresh bread and Plasticine.
I eventually fell for the Rolls Royce hype and used Hylomar, but probably too much and trying to compensate for leaks caused by things like chain case screws that went into holes with stripped threads etc... I used to take great pride in having a T140V that didn't leak oil though (until it did).
A T140 that didn't leak. That requires a divine miracle and a blessing with holy water from the Pope himself. Then you still need to get lucky. Beats me how a dry sump engine can leak oil overnight when there's hardly any oil in it.
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I thought a T140 that wasn’t leaking had no oil in it?
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You two are heathens, i was with a dealer selling new T140V from Meriden, sold dozens and non leaked plus only had 1 warrantee claim for a holed piston where the owner "adjusted" the points gap, thats when i found there were 2 different 750's with different bores, oopsie. That was also oil tight when i rebuilt it
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I rebuilt mine in 1982 and went to great trouble stopping leaks. I even scraped the joints with a surface plate and blue. All good gaskets, seals, etc and checked all the shafts with a magnifying glass for micro damage. All that stayed oil tight but still had a few drops of oil coming out. On close inspection it was coming out of the crankcase casting just above the scavenge pickup. A porous sand casting, the bloody thing was sweating oil, and I wasn't the only one with that trouble. I gave up after that and it was decades before I had another British bike.