Topic: GASGACINCH and head gasket !

[POPS 911]

I read on this site a long list from a wrench spinner on a top end re-build on a  CB750 [ can't find that article NOW ]  about coating the head gasket twice with GASGACINCH an letting it dry before you install on the block.   I would like to copy his whole article to add to my fix it book.  Someone on this site must have read this fix and knows the spinners name.  All help would be needed as head is ported, shaved, cam ground, and valves seated ready for back in service.

POPS BK911  ST/ET NHRA

[MoMo]

Not sure of the thread you are referring to but if you put gasgacinch both sides in the google custom search you will get at least three results...Larry

[POPS 911]

MR. WEEKS :  I read many ways to install head gasket on the MATIC'S but I would follow your wise ways to make my CB750A  tight and sound for good service and long life.   Naked or coated What say you MR. HONDAMATIC MAN

POPS BK911 ST/ET NHRA

[chickenman_26]

That technique is suggested by Mike Nixon on his site - www.motorcycleproject.com.

Stu

[POPS 911]

THANK YOU : STU , found site about head gasket.

POPS BK911

[jweeks]

Pops,
     My big motor runs a copper head gasket. Yes, I coat both sides and run a copper o ring. It doesn't leak, but the surfaces were freshly machined. Copper head gaskets are much easier to remove when sealed on both sides than a fiber head gasket. I've tried other sealants with similar results. If your mating surfaces are good, you won't have much problems with oil leaks. It's when we take shortcuts with older/recycled parts that we ending up regretting it. A Cometic head gasket can be a challenge to remove if "glued" on both sides. I freshen my motor after two seasons. The rings wear and the pistons shrink a little.

                                                                                   Hondamatic

[lucky]

I would NOT use a copper head gasket on a aluminum engine. Very high corrosion potential.

I would use the OEM gaskets or good aftermarket gaskets.

There should be no GASKACINCH on a head gasket, only on the base cylinder gasket.
Read your Honda workshop manual.

[chickenman_26]

I would NOT use a copper head gasket on a aluminum engine. Very high corrosion potential.

I would use the OEM gaskets or good aftermarket gaskets.

There should be no GASKACINCH on a head gasket, only on the base cylinder gasket.
Read your Honda workshop manual.

You won't find any Honda workshop manual suggesting Gaskacinch (or any other sealer) on a base gasket. Personally, I'd be reluctant to apply sealer to either gasket, unless I were prepared to use a stick of dynamite next time the top end needed to come off.

Stu

[jweeks]

We're talking race motors here. My copper gasketed motor uses them because I couldn't find anything else available in that bore size. Does the Honda manual cover that?

                                                              Jon Weeks

[MCRider]

Dry, wet, or semi. I don't think you'll find a definitive answer.

There are those who swear by dry. Those that say head dry and a little on the othres.

There are those who say lather them all up.

And they all will swear by their results.

Just like with oil, you'll have to close your eyes and pick one.

I prefer to install head cheeze dry, a little on one side of all the others to help positon them.

Gasgacinch that is. No "K", Lucky.   

[Bill/BentON Racing]

MCRider,+1...and you spelled it correctly! Bill

[lucky]

One thing you can do is put Gaskacinch on one side of the case and the gasket and Vasaline on the other side then if you need to remove the clutch cover or alternator cover you can do so without destroying the gasket.
However if you READ the Gaskacinch can you will find out that Gaskacinch is made in such a way as to facilitate removing the gasket. The Vasoline on the outside case half insures that there will not be a problem.

On the base cylinder gasket I would not take chances. I would put Gaskacinch on both sides.
ALSO...When you apply Gaskacinch, put a thin layer on both sides of the gasket and on the both sides of the case and cover, let them dry, and then assemble them.

When you put the main cases together put one good coat on each case half and let dry- THEN assemble.

[chickenman_26]

We're talking race motors here. My copper gasketed motor uses them because I couldn't find anything else available in that bore size. Does the Honda manual cover that?

I wasn't responding to you, Weeks. But no, why in hell would any manufacturer address methods, in a factory workshop manual, of assembling an overbored race engine with non-standard parts ? Get real, That's a bogus argument in support of gluing OE gaskets in place on a stock motor.

Stu

                                                             

[jweeks]

Stu,
     Pops bracket races Hondamatics. He directed a question at me. I answered that question. Part of racing Hondamatics requires going through tech inspection. If you weep oil around gaskets, you're out. Drag strips don't allow oil to drop onto the track for safety reasons. What you do on the street isn't the answer that Pops is looking for. There is no correct answer for all applications. A 30+ year old manual isn't the answer for products that have come onto the market since then.(No I'm not referring to Gaskacinch)
     Ported heads, shaved for compression increase,  and a reground cam have nothing to do with a "stock" motor. (Pops first post, starting this topic) No where did I advocate using Gaskacinch on both sides of an OE gasket. I use copper gaskets that can be removed, annealed, and reused when coated with a sealant. (no tnt required) I currently don't use Gaskacinch - I follow the gasket supplier's recommended sealant. (Copper Gaskets Unlimited) Cometic head gaskets are available in bigger than stock bores using similar to stock materials. I specifically didn't recommend that both sides of a Cometic be glued due to the challenges in removing it. MLS head gaskets (Cycle X) have recently come onto the market that have different bore sizes and seal very well dry. Nothing bogus here, just real opinions given for questions asked.

                                                                               Jon Weeks

[chickenman_26]

Stu,
     Pops bracket races Hondamatics. <snip>What you do on the street isn't the answer that Pops is looking for.
                                                                               Jon Weeks

Had I known that, I wouldn't have entered the conversation. Sorry...

Stu