[T3] TB Info?

jadney at vwtype3.org jadney at vwtype3.org
Tue Mar 15 20:45:26 PDT 2022


On 15 Mar 2022 at 14:07, Max Welton wrote:

> My question is .. why would a type-3 FI engine require different gaskets?

Dual carb Type 3 engines have a thick maybe 10 mm, phenolic spacer/gasket between their 
short intake manifolds and the carbs. FI engines have a somewhat thinner, maybe ~5 mm, 
phenolic spacer/gasket between the heads and the intake runners. The function of both is to 
insulate the component above, carb or injector, from the heat of the head, especially in the 
heat soak after shutdown.     

In Beetles, there are no sensitive components in that area just above the head, so no need 
for a more expensive insulating gasket.

It's rather easy to check for the wrong gaskets here, since the metal gaskets are only about 1 
mm thick.

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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