Carb insulator question

MikeG

MikeG

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Are gaskets required on both side of manifold to head insulator?
 
The Andover drawing shows no gaskets (1 & 1A are 1/16" & 1'8" thick respectively):
Carb insulator question
 
I use a paper gasket on either side of the phenolic spacer along with Yamabond. Phenolic is not a gasket. If you apply yamabond on the phenolic and the head the intake will suck all the gasket goo and there will be an air leak. That makes an airtight seal. for the carb to manifold I rely on the o-ring.
 
That might depend on the insulator surface.
I got a Bakelite insulator off M,M and I Engineering which got a light coat of WellSeal to all four surfaces and left to tack off.

Carb insulator question Carb insulator question

Heat might still soak through to the manifolds via the fasteners at rest with a hot engine.
 
MikeG said:
Are gaskets required on both side of manifold to head insulator?
Click to expand...
Lots of disagreements on this!

I say: Amal specified them, Norton, Triumph, BSA, et. Al. used them. None of them specified gaskets or sealers as far as I know. I certainly do not. If they are not in good condition, I change them.
 
Another application where spray Copper Coat comes to the rescue.

Carb insulator question
 
Last edited:
Question.

Would the fitting of a thicker insulator (eg. 06.2700 - 1/8") require any changes to the carb set-up (single Amal in my case)?
 
Time Warp said:
That might depend on the insulator surface.
I got a Bakelite insulator off M,M and I Engineering which got a light coat of WellSeal to all four surfaces and left to tack off.

View attachment 113097 View attachment 113098

Heat might still soak through to the manifolds via the fasteners at rest with a hot engine.
Click to expand...
Nice phenolic. When you remove the manifolds see if there is any wellseal left
 
Bonzo said:
Question.

Would the fitting of a thicker insulator (eg. 06.2700 - 1/8") require any changes to the carb set-up (single Amal in my case)?
Click to expand...
No, I use them on all manifolds that are 32mm at the head end. The are not suitable, IMHO, for manifolds that are 30mm (1-1/8") at the head end.
 
phippsy said:
I used paper both sides and a bit of blue hylomer and mine are rubber mounted , cooler carbs .
Click to expand...
What bits are you using to do this? Is it the Mk2 adapter + ???
I've been thinking about rubber mounting my carbs, but have not really found any suitable bits
 
I use Hylomar M or Advanced which I get from here:

www.fagengine.com

HYLOMAR

The world's #1 non setting sealant. Countless racing teams and mechanics rely on forming an instant, leak free seal with Hylomar, and nothing compares to these unique sealants.
www.fagengine.com www.fagengine.com
 
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