40727 Fuel Pump
 

I have an oil mess in the fuel pump area and cannot locate any obvious locations other than the pump itself.
The crimp seems tight,any ideas?
Its an AC 40727 with the AC cast onto the body.

727 pump..
 

If you have another pump...clean the area good..and replace and see what you get. Maybe the internals are shot...that could mean gas in the oil...do a sniff test on the dipstick.

-wilma

Hi, Wilma.
No gas in the oil. I was going to simply change the pump but the AC logo on the body versions are NLA. Only 200 miles on this one but it must have been sitting around for a while.
I guess I'll pop a cheapie on there and see.

I know that Dave Beem had his original LS6 fuel pump restored. If I am not mistaken they put vitol pump diaphrams in them so the ethanol will not eat them away.

How is the pipe plug seal for the fuel pump pushrod access hole?

Bingo! definitely on the suspicious list!

Hmmm. I'll check that.

Its not the plug.

I hate to sound like a buffoon, but are you certain the oil isn't running down out of the valve cover? I've seen people drop oil pans, yank engines, etc. to "fix" a rear main that was never leaking at all; merely oil coming from the back of the valve cover.

Positive not from anywhere obvious. Seems to be from the pump itself. But I've never seen a failure like this. Only a gas leak type failure.
Slow drive around the block nothing. Take it out on the highway and I have a mess.
I also checked the vent system,all good.