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01-03-2006, 07:58 PM
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#1 |
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Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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fuel pump oil problem
I keep blowing the oil pressure valve in my fuel pumps. I get about 1500miles out of a pump has anyone every had this trouble??
__________________
 1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car |
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01-03-2006, 08:03 PM
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#2 |
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Account Suspended
Join Date: Sep 2005
Location: Monroe, WA
Posts: 3,814
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Re: fuel pump oil problem
Oil pressure valve?
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01-03-2006, 08:06 PM
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#3 |
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Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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Re: fuel pump oil problem
Yeah mechanical fuel pump has a relief valve in it. With a small hole like a water pump. So if theres too much pressure it wont break the pump. I think
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1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car |
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01-03-2006, 10:13 PM
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#4 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: fuel pump oil problem
Can you explain / describe this in more detail?
What is the symptoms you are having? Where is this part located? What year/make/model of engine are you dealing with? Stock original, stock replacement, or aftermarket parts? Personally, I have never heard of this. |
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01-04-2006, 12:51 AM
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#5 |
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Senior Member
Join Date: Nov 2005
Location: northwestern wi
Posts: 2,111
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Re: fuel pump oil problem
sounds like you have a crankcase ventilation problem to me
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common sense isn't so common anymore |
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01-04-2006, 01:01 AM
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#6 |
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Account Suspended
Join Date: Dec 2005
Location: SPOKANE, WASHINGTON
Posts: 1,001
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Re: fuel pump oil problem
I had this problem with the edelbrock fuel pumps. I now havean electric pump and no problems.
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01-04-2006, 12:46 PM
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#7 |
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Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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Re: fuel pump oil problem
had the problem with a stock pump first then edelbrock, then holley, mechanical fuel pump on my 327. I have 2 large breathers that I've checked every time this happens. I run around 85psi cold 55-60 warm never leaks anywhere else. I think I'm going to have to go electric but the more I look into it the more fuel cell guy and new lines and filters and the different pump with or without regulators all gets overwhelming.
__________________
1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car |
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01-04-2006, 01:02 PM
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#8 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: fuel pump oil problem
Fuel pumps don't have oil pressure valves. Oiled by what comes by fuel pump rod and splash from return hole. What you see coming out vent hole is gas and oil. The pump diaphram is leaking on the up side. Have no idea why it keeps doing this other then maybe pulling a lot of junk out of tank.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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01-04-2006, 01:11 PM
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#9 |
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Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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Re: fuel pump oil problem
humm?? never leaks any gas no smell or rainbow no fuel pressure loss. and yes a better word would be pressure relief vent not valve.
__________________
1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car |
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01-04-2006, 01:36 PM
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#10 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: fuel pump oil problem
Just what is your pumps doing?
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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01-04-2006, 02:02 PM
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#11 |
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Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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Re: fuel pump oil problem
under load leaks oil out the vent hole
__________________
1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car |
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01-04-2006, 02:13 PM
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#12 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: fuel pump oil problem
Sounds like your crankcase does not have enough vents. PCV working?
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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01-04-2006, 02:49 PM
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#13 |
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Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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Re: fuel pump oil problem
yeah thats what I thought. I don't have a pcv I have 2 k&n breathers
__________________
1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car |
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01-04-2006, 06:15 PM
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#14 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: fuel pump oil problem
Time to hook up a PCV. It is way better than breathers.
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01-04-2006, 07:09 PM
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#15 |
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Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Re: fuel pump oil problem
I can see why a PCV would be better than breathers since it creates a slight negative pressure within the crankcase. You may have excessive ring blowby, causing higher than normal crankcase pressure. I just can't imagine oil venting at the fuel pump unless the breathers are clogged with oil and crud.
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.   
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