mech fuel pump insulator on chevy big block - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-06-2012, 03:19 AM
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mech fuel pump insulator on chevy big block

Hello!
I'm just about to install fuel pump on my new build but have a question regarding the insulator, do big blocks using these as original?
Last time I installed a new pump was on a chevy small block and they had this insulator..

I don't know if you say insulators but at summit they are namned like that:
http://www.summitracing.com/parts/CTR-85-010/

What I mean is like a very thick gasket that I think should block from heat (I think?).


It doesn't feels like there should be a thick plate/gasket inbetween because without it is still is a pretty long way between when the rod lost contact with the mech fuel pumps lever arm and when it's starting to be contact again (when I turn engine over by hand while my brother holds the pump against the block).
with a insulator it feels like that the rod wouldn't push on the pumps lever arm for a long way enough.

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Old 06-06-2012, 06:12 AM
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I've always seen gaskets be used, but not these. Since the fuel pump rides on the side of the engine they get a blast of constant air when the vehicle is moving down the road. I can see how a heat shield would be a good idea but it's not going to help power any. Make sure you lube the spring area of the pump before you install it.
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Old 06-06-2012, 12:01 PM
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I believe something like this is what you are looking for: Fuel pump seal
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Old 06-07-2012, 08:35 AM
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Thank for replies, if you haven't seen them, then maybe big block not uses these.. on the fuel pump seal link, it's look like it's the part "thermal gasket"

But with the fuel pump and the engine gasket kit there is only one thin gasket included
, but same thing on smallblock and they are using these
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Old 06-07-2012, 08:49 AM
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Quote:
Originally Posted by Berres
Thank for replies, if you haven't seen them, then maybe big block not uses these.. on the fuel pump seal link, it's look like it's the part "thermal gasket"

But with the fuel pump and the engine gasket kit there is only one thin gasket included
, but same thing on smallblock and they are using these
The SBC has a plate, the BBC pump bolts to the block. I have never had a need for anything else like a thick gasket/insulator.

Last edited by cobalt327; 06-07-2012 at 09:00 AM.
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Old 06-07-2012, 09:13 AM
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Quote:
Originally Posted by cobalt327
The SBC has a plate, the BBC pump bolts to the block. I have never had a need for anything else like a thick gasket/insulator.
How thick approx?
My gaskets are both very thin..
I can remember the sbc thick gasket to be like 0.5cm or thicker?
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Old 06-07-2012, 10:37 AM
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Quote:
Originally Posted by Berres
How thick approx?
My gaskets are both very thin..
I can remember the sbc thick gasket to be like 0.5cm or thicker?
Not thick, like 0.035"-0.050".
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Old 06-07-2012, 11:06 AM
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Ok, thanks a lot!
I just mount it with the gasket included.
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