Carb gasket order

[Mac2Night]

So quick question. I have my stock M/C 2100 carb off and two gaskets (the thick one and the thin one). Which order do I put them back on (I have forgotten and I have a leak)? Is it:

1) Intake, thick gasket, spacer, thin gasket, carb OR
2) Intake, thin gasket, spacer, thick gasket, carb?

Thanks!
Mac

 

[Slowleak]

#2. Thick insulating gasket goes on top of the spacer.

 

[jckkys]

As I said in your earlier thread titled Vacuum Leak, the thick insulating gasket goes between the carburetor and and the aluminum spacer.

 

[Mac2Night]

Thanks JCKKYS! I had it backwards so that must be why I have the leak. I can't wait to get home and check it out. Thanks again!

As I said in your earlier thread titled Vacuum Leak, the thick insulating gasket goes between the carburetor and and the aluminum spacer.

 

[661buster1963]

For the rookie in the room, why does #1 not work?

 

[jckkys]

Both would likely "work", but the carburetor is the part your trying to keep cool. The carburetor is also the part most likely bend (warp) if over tightened and the thick gasket will seal a slightly bent carb base.

 

[Justafordguy]

For the rookie in the room, why does #1 not work?

Because with the thin gasket against the carb you will very likely have a vacuum leak. ;D

 

[Mac2Night]

So, I finally got the gaskets all in order and in place and STILL have a very slight leak at the manifold/spacer base about the thickness of a human hair. Ughhhh..... With that slight leak, the carb still stumbles after the plate starts opening, but not near as bad as it did before. But, when I hit the throttle, the carb just stumbles more and then dies.

I am wondering if I stack (2) thin gaskets there will it possibly help fill that slight gap and eliminate the leak. Thoughts?

 

[DJs74]

So, I finally got the gaskets all in order and in place and STILL have a very slight leak at the manifold/spacer base about the thickness of a human hair. Ughhhh..... With that slight leak, the carb still stumbles after the plate starts opening, but not near as bad as it did before. But, when I hit the throttle, the carb just stumbles more and then dies.

I am wondering if I stack (2) thin gaskets there will it possibly help fill that slight gap and eliminate the leak. Thoughts?

In your original post titled "Vacuum Leak", that's the reason I was suggesting to evaluate the possibility of using a Holley 2 bbl gasket - they offer a variety of thicknesses and materials that could likely solve your problem.
Someone familiar with the 2 bbl configuration might know if this is possible... if yes, you broaden your choices.

DJs74

 

[jckkys]

As stated the cast iron carb mounting surface is milled and unlikely to be bent/warped in any way. The aluminum spacer is much stiffer than any carburetor but could be bent or have a burr keeping it from sealing well. A straight edge or known flat surface held against the bottom of the spacer would reveal either. Even the intake mounting surface and feeler gauge with no gasket would work. If the spacer has a burr, filing it of is easy. If it's bent I would replace it or get it milled at a machine shop. Ford made the 2bbl spacers in several throttle bore sizes. The engine size is cast into one of the little indentations over the PVC port. So you want the right one for a 289-302. There are plenty on ebey for 25-30 bucks.