Author Topic: 69 z28 carb.insulater  (Read 5278 times)

canadair

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69 z28 carb.insulater
« on: August 02, 2012, 10:18:49 AM »
Did the holley carb use a heat insulater between the carb and manifold on the 302 engine.   

william

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Re: 69 z28 carb.insulater
« Reply #1 on: August 02, 2012, 01:04:35 PM »
Depends on how "heat insulator" is defined.

Holley carbs used a gasket between the carb and manifold as shown in the assembly manual. They did not use a metal plate as some Quadrajets did.
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canadair

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Re: 69 z28 carb.insulater
« Reply #2 on: August 02, 2012, 03:57:09 PM »
this insulater was a gasket and metal shield seperating heat from the intake maifold from the split gas lines.

bertfam

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Re: 69 z28 carb.insulater
« Reply #3 on: August 02, 2012, 04:11:48 PM »
If you mean THIS (P/N 3969835 for the Holley and 3969837 for the Q-Jet), it wasn't used in 1969. They started using these in 1970.

Ed

william

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Re: 69 z28 carb.insulater
« Reply #4 on: August 02, 2012, 04:50:23 PM »
I do not believe that was ever used in production.
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JohnZ

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Re: 69 z28 carb.insulater
« Reply #5 on: August 02, 2012, 04:58:16 PM »
I remember an insulator/shield llike that being installed on an IROC Z/28 I had at the dealer as part of a TSB on fuel percolation/rough idle.
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69Z28-RS

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Re: 69 z28 carb.insulater
« Reply #6 on: August 03, 2012, 05:21:07 AM »
they do have a GM part number, and I recall seeing them around that time frame, but not on '69's..

Gary
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william

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Re: 69 z28 carb.insulater
« Reply #7 on: August 03, 2012, 02:06:02 PM »
Holley carbs were phased out of production after '71; maybe the few '72 Z/28s built still used them. There are plenty of vintage magazine photos of those cars and none of them used it.
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