SOHC.co.uk Forums > CB500/550
Liquid gasket on top of everything else?
K2-K6:
--- Quote from: alexdecker on March 22, 2022, 06:55:11 AM ---Several people says they use blue Hylomar for the crank case halves as well. It is readily available in my region. Can I use that instead?
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Hylomar blue is the right product for a joint like this but obviously Honda chose their product to match their expectations (don't think Hylomar was available at the time of development) but it does split opinion on here as to which product to use.
Whatever, and as Bryan says above, you have to use ABSOLUTELY the minimum coating on these surfaces to avoid the risk of having stray/excess floating around inside the engine.
Think about how a self sealing envelope sticky coating is thickness wise.
The surfaces are an "engineered" tolerance design that has to squeeze ALL excess sealant out as you tighten to give accurate location of the crankshaft bearings and how the clearance then works. Only the smallest amount of sealing remains in the surface imperfections to avoid them leaking, the remainder is touching metal to metal.
MrDavo:
Sorry to bring agricultural products into this, but both Hondas I've rebuilt in recent years had the crankcase joints done with a thin coat of Harley-Davidson High-Performance Sealant, left over from rebuilding my blown up Sportster.
https://www.harleydavidsondirect.co.uk/products/h-d-high-performance-sealant-gray?currency=GBP
Lobo:
Um, appreciate the application has to be thin; but how to get that? Smear it with a finger, trowel the bulk off with a plastic blade….. ???
McCabe-Thiele (Ted):
--- Quote from: Lobo on March 22, 2022, 11:02:47 AM ---Um, appreciate the application has to be thin; but how to get that? Smear it with a finger, trowel the bulk off with a plastic blade….. ???
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Oddly enough the thin film is easiest to obtain by squeezing some onto a suitable rubber gloved finger then smear it onto the casing - reload your finger when one it's depleted.
If you put it on the casing first then spread with a gloved finger it ends up thicker for some reason! (Tip from Nurse Julie)
Laverdaroo:
--- Quote from: Sesman on March 22, 2022, 06:19:24 AM ---I use Hondabond HT, the Red one. No doubt it’s the wrong one🤔
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If your engine doesnt leak it's probably the right one ;D
I'll order some of that Phil(thunmbs up emoji) ;D ;D
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