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oil leaking out of where mechanical fuel pump would be

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Old Oct 13, 2009 | 12:01 PM
  #1  
pbtrilogy's Avatar
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From: Greenville, NC
Car: 1985 Z
Engine: 89 305 TPI
Transmission: 700-R4
Axle/Gears: OSD 10 bolt/ 3.42
oil leaking out of where mechanical fuel pump would be

Is oil suppose to be leaking out of the cavity where the mecahnical fuel pump would be on a carbed engine??? I have the tpi system.

The oil has been getting everywhere under my car and im suspecting it coming from there because when i felt around in the cavity i could feel the oil.

I recently put a fuel pump block off plate there so im hoping that will fix the problem
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Old Oct 13, 2009 | 01:10 PM
  #2  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
More likely that the bolt hole on the front of the block that goes to the fuel pump push rod passage is missing the bolt or is leaking around the bolt threads.
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Old Oct 13, 2009 | 03:15 PM
  #3  
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From: loxahatchee fla
Re: oil leaking out of where mechanical fuel pump would be

http://forum.grumpysperformance.com/...hp?f=62&t=1430

step one is to clean the oil off with a good degreaser solvent like several engine wash products,like GUNK or even hot soapy water with something like dawn dish washing detergent, followed with a pressurized hose several times, then put the car up on a lift and inspect it with a strong light from both over and under and have a small mechanics mirror available. if you locate the leak you can usually finda way to fix it, but without knowing the source your at a huge disadvantage....

Last edited by grumpyvette; Oct 13, 2009 at 03:21 PM.
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Old Oct 13, 2009 | 04:43 PM
  #4  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally Posted by pbtrilogy
I recently put a fuel pump block off plate there so im hoping that will fix the problem
Thinking about this some more, if you didn't have a plate before, it means the block was never machined for a mechanical pump. So, there is no path for oil to leak from that area.

Take grumpy's advice and find out where the leak is coming from.
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