73 340 duster thermoquad spacer ?

CFD244 said

Hmmm.....I think I got that. Engine runs good (idles with 11 A/F ratio) but has a large sucking sound that seems to be coming from the rear of my TQ. I spayed some water in the center area of the rear base and noticed a definite change in the idle. How would one recognize the difference between the 2 gaskets?

Also, is there a paper gasket installed above and below the thick one?

Click to expand...

No thin paper gasket. Just the thick insulator gasket.

Thremoquad gasket. There is also an open hole version of the Thermoquad gasket, but as you can see, the Thermoquad gasket has a thicker back wall. Using the Queerdrajet gasket on the Thermoquad will result in a vacuum leak around the back of the secondaries. Most stores will try to sell you the wrong gasket, because they want to stock as few parts as possible.


Queerdrajet Gasket.