Fuel Pump Leaking
Thread Starter
Instructor
Joined: Apr 2006
Posts: 201
Likes: 3
Fuel Pump Leaking
It's leaking oil not gas. I've never had this happen but it sure looks that way. AC compresser is keeping me from see the pump real good, but after last week-end trip I discovered oil all over the right side inner fender well and in the area of the forward part of the right side of the block. Top of fuel pump and first two plug wires are dripping with oil. As well as all down the sides of the pump. Oil also on top of frame rail. As well as the ac hoses and the fuel hoses near the pump. The timing chain cover and its gasket edge looks clean. Valve cover is clean. No oil on the top area of the headers or their mounting flange. This seems to me to be an unusual place to have oil all over but can't figure where else it could be coming from. I don't know if a broken diaphram in the pump could allow oil thru. Or if the pump gasket could blow out enough let that much oil out. Anybody ever have oil coming out of the fuel pump anywhere? Or any other ideas? Thanks.
Race Director
Joined: May 2006
Posts: 18,731
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It could be the pump gasket or the diaphram has a hole and blows out the vent holes or on the front of the block there is a bolt hole that goes through into the oil gallery and it should have a short bolt with sealant installed.
Burning Brakes
Joined: Sep 2009
Posts: 1,003
Likes: 48
From: hickory NC
C4 of Year Finalist (appearance mods) 2019
2017 C4 of Year Finalist
Yes, had that happen to mine also. Looked like a fog machine going down the road and scared the crap outta me. Same thing, oil all over, narrowed it down to the pump. Replaced it and all is good again.
Thread Starter
Instructor
Joined: Apr 2006
Posts: 201
Likes: 3
Yeh, I was hoping someone would agree with me that it could be the pump. Tomorrow night I'm going to get the ac compressor out of the way and run it some more to see if I see the leak. I forgot about the bolt on the front of the block. I haven't touched it in years but it could be leaking. Thanks for the help.
Burning Brakes
Joined: Sep 2009
Posts: 1,124
Likes: 140
From: Western New York
Look carefully before you buy or replace anything. I thought for sure my pump was leaking, as I had oil all over the pump and S hose. When I got under the car, I realized the oil seal behind the balancer on the timing chain cover was actually leaking, and the oil was migrating down the right side of the engine. Good luck!
Duane
Duane
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From: CORVETTE 77 385 C.I. TEXAS
Melting Slicks
Joined: Aug 2010
Posts: 2,487
Likes: 10
From: Palm Beach Florida
St. Jude Donor '12
It's leaking oil not gas. I've never had this happen but it sure looks that way. AC compresser is keeping me from see the pump real good, but after last week-end trip I discovered oil all over the right side inner fender well and in the area of the forward part of the right side of the block. Top of fuel pump and first two plug wires are dripping with oil. As well as all down the sides of the pump. Oil also on top of frame rail. As well as the ac hoses and the fuel hoses near the pump. The timing chain cover and its gasket edge looks clean. Valve cover is clean. No oil on the top area of the headers or their mounting flange. This seems to me to be an unusual place to have oil all over but can't figure where else it could be coming from. I don't know if a broken diaphram in the pump could allow oil thru. Or if the pump gasket could blow out enough let that much oil out. Anybody ever have oil coming out of the fuel pump anywhere? Or any other ideas? Thanks.
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Thread Starter
Instructor
Joined: Apr 2006
Posts: 201
Likes: 3
[QUOTE I get watery oil running down the fram. :[/QUOTE]
I think we might be talking about similiar effects but different condition. If your substance is watery, make sure it is not coolant mixed with oil. In my case it is deffinately oil. If yours is watery, it could be the lower radiator hose, the heater hoses or the water pump.
thanks all.
I think we might be talking about similiar effects but different condition. If your substance is watery, make sure it is not coolant mixed with oil. In my case it is deffinately oil. If yours is watery, it could be the lower radiator hose, the heater hoses or the water pump.
thanks all.
