fuel pump gaskets????

[Willy_g77]

i order a new fuel pump for my 71' gt. i got it now and it came with two really thin gaskets... but i have a gasket set and it has one really fat gasket with it. same shape and all. and it has a little black rubber ring. what do i need to install the fuel pump? do i need to change fuel filter? do you have to have a toqure wrench to put it back on? and tips or tricks?

[GTJIM]

The gasket order is one thin - the thick spacer - another thin gasket.
The rubber ring is probably the internal oil seal that is only needed if the pump is not new. It seals the operating shaft and stops oil getting inside the pump itself. A new pump will have a new one inside already.

Soaking the thin gaskets with a bit of oil is one of "Nobody's" tricks to help them seal.

The mounting bolts don't have any actual torque settig in the Manual (that I can find, anyway!) but they are small and don't need their necks wrung. Just nip them up securely - if you pull the heads off they have been done up too tight Seriously, they screw in to the soft alloy front cover and the threads there will not take to much tightening before they strip out so care is needed - a couple of fingers on the side of the spanner and a bit of a push is enough.

[Willy_g77]

I finally got it done... the top bolt is a b*tch to get out and back in.. but other than that it was easy... thanks again... i didnt know it would run so much better with a new fuel pump....

[opeldean]

I put on a fuel pump awhile back. I did not touch the spacer. I just backed out the 2 bolts, new gasket and pump.
the problem is I am leaking oil at the fuel pump.

question 1-what is the right way to put on a fuel pump.Do I need 2 gaskets?
1 for the spacer and one for the pump?

question 2-how long do you soak gasket in oil before you intall?

question 3- can red silicone sealer be used on the gasket or instead of the paper gasket?

question4- can I cut my own gaskets out of thicker gasket material w/o causing another problem.

thanks

[nobody]

Yes you need 2 gaskets, I just wet down the gaskets before I start and might wet them down again if they start looking dry. Silicone normally squeezes out thinner than most gaskets so you wouldn't be doing the best for the pump using it instead. By all means cut you own gaskets of that type just be careful of the proper thickness. I'd measure one for you but my calipers seem to have a dead battery.HTH

[GTJIM]

Dean,

It depends where the oil is leaking "at the fuel pump" - if it is from the gaskets then they may be too thick. If it is from the small round hole in the lower half of the fuel pump body then it is probably the rubber seal around the pushrod shaft (#5 in picture below).

1) Yes you need both gaskets and the spacer - the gaskets make up for any irregularities in the die cast surfaces of both the pump body and timing case.
The gaskets should be quite thin (.020" or .5 mm)so the "ears" of the fuel pump do not bend when the bolts are done up. The spacer is there to insulate the pump from direct engine heat.

2) Just make a wee puddle of oil and soak both sides of the gasket.

3) an alternative to soaking the gaskets in oil is to coat the gasket lightly with RTV but it clamps out too thin by itself. The stroke of the pump means that correct fitment requires two gaskets, along with the spacer which is mainly insulation.

4) you can certainly cut your gaskets out of ordinary sheet materials - just make sure it is not too thick.

[jlthunder]

I would like to bring this thread back to life.

I replaced my fuel pump last night on my '72 GT with a new one from OGTS. I had a spare "thick gasket" so I compared the one on the car with this spare one. The spare one was approx thicker by about 1/2 the thickness of a dime. I used the original thick gasket along with 2 new thin gaskets(one on each side of the thick gasket). The old fuel pump was stamped with "AC" as in AC delco on the underside of the pump head.

The car runs fine but I don't want the fuel pump to fail prematurely.

Does anyone know why there are 2 sizes of thick gaskets? Did the spare one Swell since it was off the car? Does it matter which one I used?

[bosco]

If I remember correctly the new gaskets from OGTS come with the two thin gaskets already attached to the spacer...maybe your spare is one of those.

[jlthunder]

bosco;

You are partially correct. Yes it did come with the 2 thin gaskets, but not spacer. The spacer can be reused which is why it is sold seperatly(like batteries not included )