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Hi Guys,
Much of what makes me tick in my retired situation is tinkering with my Oldses and carbs for them. My question is: What is the proper way that Holley designed the seal between the main bodies 'accelerator pump passage' and the metering block? This apparently is an earlier model which does not have the transfer tube and 'o' rings on either end.Please note arrow which shows to what I am referring
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In one spec sheet on a 4165, it refers to inserting roll pin and 'o' ring over it flush. Other than that I Have found nowhere mentioned how to seal it on an early model 4160. Know that without something there it runs poorly or not at all
Gasket #55 perhaps? It appears there is a hole in the gasket that aligns with the pump passage.
Gasket #57 also has (or should have) a hole for the accelerator pump.
I once got a Holley 600 for $5 because someone used the wrong gasket in the #57 location - used one with an open area instead of a hole to seal the port. Someone rebuilt it and it had no pump shot, so they turned it in as a core and bought a reman carb. I was able to get the Holley for the core charge, installed the correct gasket, and ran it on my car for a while then on my friend's '67 Camaro after that.
Last edited by Fun71; November 8th, 2017 at 11:43 AM.
You make a good point I may have overlooked. I haven't broken the carb down yet but will bet the #55' gaskets are as you stated 'open hole' ones. Therefore I thought an 'o' ring of sorts was the answer. I guess it requires me to rip it apart and find the right #55 gasket. That makes sense! I guess the more open gasket is meant for the later model versions that used the transfer tube with 'o' rings that I referred to earlier. I'm in know rush or need because the car is running with another carb at the present time. At sometime, however, I will follow through. For me , learning about the fix is key.
but if you look at part 102 the secondary metering plate above the hole where the power valve goes it is recessed so if the #101 primary metering plate is the same it wil not sandwich that gasket very good and could leak
The gasket to the left is the one I should be using on the primary metering block to body. Got a feeling I"m using the middle one ( which I think is provided for the later models that use the transfer tube with o rings on both ends for seal). Correct me if I'm wrong, the gasket to the right is for the secondary metering block.
November 8th, 2017, 08:37 AM
