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Permatex Red RTV silicone gasket sealer?

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Ericcb750

Permatex Red RTV silicone gasket sealer?

Hey guys, I'm replacing the head gasket on a 78 CB750K and I'm having quite a time scraping and cleaning off the original gasket and what looks like red hard sealer. I was given advice to use the permatex red RTV silicone gasket maker in a very thin layer on both gasket sides when I re-assemble. Does anyone have any experience with this one, I've read there are some other types that are better but i wanted to check with you guys as this is the first time i'm doing this. Any advice would be appreciated, Thank you.

Eric - CT - 1978 CB750 K

TOOLS1

Re: Permatex Red RTV silicone gasket sealer?

Administrator

NEVER USE GASKET SEALER ON A HEAD GASKET!!!!!!!! And never use silicone on an engine!!!!! Also the best thing I have found for cleaning off old gaskets is a scotchbrite disc on a high speed drill.
TOOLS

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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
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motogrady

Re: Permatex Red RTV silicone gasket sealer?

Administrator

I knew that was comin"

Tools is right, the stuff squishes inside the motor, pieces break off, gets in the oil stream....bad news.
Clean the surfaces good, fresh, clean gasket, proper torque on the bolts, go riding.

TheLastJoker

Re: Permatex Red RTV silicone gasket sealer?

I was just reading either on this forum or over at sohc4.net that someone's camshaft literally broken apart because it wasn't getting oil to the carrier. Cause- sealant clogging the oil passage way. For other applications it may be ok, but steer clear of it in this area.

1978 CB750F Super Sport

Ericcb750

Re: Permatex Red RTV silicone gasket sealer?

In reply to this post by TOOLS1

Wow....Um There's my answer right there. I definitely don't need that happening. I'm glad I asked before I went ahead with this. I have used a little finishing buffer attachment on my Dremel to clean up the surfaces of the head/cylinder so they're nice and clean/shiny. So it's probably best not to use any type of Gasket Sealer at all then ??? Thanks for the advice, I really appreciate and i'm glad I asked.

Eric - CT - 1978 CB750 K

Lucky 1

Re: Permatex Red RTV silicone gasket sealer?

In reply to this post by Ericcb750

Never use blue or red silicone on a Honda engine.

USe Gaskacinch or its copy cat, Honda bond or another copy cat Yamabond.

Made for these engines.

When I see RTV on a Honda engine I cringe
because I know a real amateur has been working on it.

On a Roadstar Adventure.