gas leak on fuel injection pump

[Bruce W.]

Hey guys, 1957, 4360 fuel injection unit seeps gas at the bottom of the high pressure pump where it bolts into the main body.. I replaced the rubber gasket and used two rubber gaskets. Still seeping fuel? Other than that the unit runs great. This leak is not coming from the drive cable. seems to be coming from the gasket area. Any ideas. Is there some kind of gasket sealer that I should be using? appreciate any help. Bruce

[Stuart F.]

Re: gas leak on fuel injection pump

Bruce;

We had the same problem on A 62 Fuelie recently. It is, from what I understand, a common problem specially with the ethanol tainted gas of today. We got a special gasket from John De Gregory (believe it was made of Viton), and that seems to have curied the seepage.

I saw your Thread earlier and expected either John or one of the other FI experts would chim in, but as they didn't (probably all out to church or enjoying the beautiful fall weather), thought I would pass on that which I know. Also, there may be a slight warping problem, but again they can advise you better.

Stu Fox

[Jim L.]

Re: gas leak on fuel injection pump

Bruce,

In all probability, the pump mounting area on the fuel meter is warped. This isn't a common occurrence with the early aluminum sand cast fuel meters, but it happens. (It is an extremely common problem with the later zinc die cast fuel meters.)

I haven't had any luck with sealers, even those rated for use with "gasoline". The reason is the ethanol in most motor fuels. It readily dissolves every sealer I've tried.

The solution to a warped pump mounting area is to resurface the fuel meter pump area. This generates debris which gets into the fuel passages, however. The fuel meter must be disassembled before re-surfacing and thoroughly cleaned out afterwards. I wouldn't recommend this job for a Do-It-Ur-Selfer.

Jim