Fuel pump gasket

kamzack

I'd like the correct thickmess the gasket stack . I'd like to know if a spacer milled from aluminum would do as well or better. Would the aluminum dissapate heat as well as the stack? Opinions or ideas please.

Thanks,

Kim

[Deleted User]

Kim you did not say what engine you are talking about . I think a alum. spacer would be ok , the thickness on a 1937 fuel pump is .250 thick different years take other thickness of gasket. Chuck G

Unknown

The gasket stack doesn't transfer heat. I would think that using aluminum in place of the stack will just transfer unwanted heat to the fuel pump.

kamzack

I'm working on 262 and also have a 254 at the machine shop. My idea was to use a gasket on both sides of the aluminum and not have to bother with the stack. As you may know gasket is common to a variety of applications and are easy to get. Didn't know if the aluminum spacer would transfer too much heat or not. I'm guess I'm looking for an easier, resuable way to change fuel pumps. I've changed 3 within the last week on one engine. A rebuilt dual diaphram pump failed on the way home from Pontiac, so that's part of my motovation to ask these questions and opinions. I had one stapled stack and and have had to have my local parts guy order a batch of them, and is also the reason for wanting to know the correct thickness.

Thanks for the help,

Kim

hudsonguy

Kim,



I'd also not recommend using aluminum, it will transfer heat from the engine quite efficiently, which is something you don't want to do.



I also wanted to improve upon the stapled gaskets that the original stack was made of, and I machined a spacer from Ultem plastic and placed a gasket on each side of it. I've also done the same with the spacers underneath the carburetors. The stuff works great, it's chemically resistant, and will withstand extremely high temps. I wasn't sure how it would hold up to use, but after 10,000-15,000 miles this fuel pump spacer hasn't so much as seeped a drop. There always used to be a slow migration of oil down my block under the pump, but no more!



Here's where I bought the material used; http://www.mcmaster.com/#7612k51/=2xed6j

Geoff

The pumps originally had fibre sleeves aroun d the bolts, fibre washers uner the bolt heads, and a fibre type gasket stack, all with the intent of stopping heat transfer. Definitely do not use alloy spacier, as this would transfer heat to the pump. Probably electrical type insulating sleeves, as used to cover wires going into hot water cylinders, heaters, etc. would be suitable, and the plastic insulator illustrated is obviously the way to go as well. heat shielding of the exhaust pipe is also advisable, and any method of venting or ducting to direct cool air int he direction of the pump is helpful.

Geoff.