G63B | oil sensor and electric fuel pump

[pennyman1]

There is a thread on here where I give the part number for a 3 prong sensor like you are looking for, it is a wells ps128. You have to get an adaptor fitting to adapt the switch to the metric port on the block. I got an adaptor kit with various adaptor fitting in it to match up the port on the block to the switch. Best way is to go to a real auto parts store like napa that has fittings in a drawer with the oil light switch from the block and the switch and get an adaptor that matches up. I have run this switch this way on Geronimo for 31 years, and the only problem I ever had was the switch failing, not the fitting leaking.

[jdmckay]

Thanks PennyMan... read/searched everything here I could find on electric fuel pump/weber conversion but did not see that.

I went to NAPA and several Performance specialty stores here (Albuquerque), could not find adaptor. You said the block's thread was metric (right?): from all I determined, it is a little used thread anywhere: 1/8-28 ISO Tapered.

Anyway, I pulled the mounting plate for fuel pressure switch/oil filter off the block yesterday, took it to a machine shop and had it re-threaded for 1/4 NPT thread... whole bunch of switches from Wells/AirTex/BorgWarner with that thread. Bought a BorgWarner @ O'Reilley's. Machining was just $20.

One thing I am curious about (haven't looked at my Chilton's manual for this yet): my engine rebuilder mounted that adaptor plate w/out a gasket (he screwed a bunch of things up). Several cutouts on the mounting face w/block had gasket residue, he just used some type of "form a gasket". Thinking best to put a gasket in there, I have plenty of gasket material. If anyone's sure about this I'd appreciate knowing.

Thanks.