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#1
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Help with a fuel pump
Looks like I have a oil leak near the fuel pump. I changed the gasket and tighten the bolt could be leaking from there or somewhere else . Seems odd it would leak oil from the fuel pump any help would be great
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#2
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What year is your car what engine does it have?
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#3
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Sorry a 1975 t/a has a 1970 400 engine
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#4
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Supposed to be a special fiber/rubber coated flat washer under the bolt heads.
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#5
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do you mean the bolt heads for the fuel pump (both bolts )
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#6
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yep.....
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#7
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#8
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Haven't seen that before, specific to Pontiac engines? I guess it seals the bolt shaft hole once tightened, are they open threads into block inner?
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#9
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Quote:
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#10
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yes they are open holes exposed to oil. |
#11
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yes unless you want it to still seep oil.
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#12
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No. On a real Pontiac V8 engine the fuel pump bolts to the timing chain cover, not the block like a Chevy. Have seen cracks in the side of the aluminum timing cover just above the fuel pump that can leak oil and look like it’s the pump that’s leaking.
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#13
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Why do you think special washers are used there? To stop oil seepage past the threads. |
#14
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great info guys thanks
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#15
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Only the inner bolt (closest to the block) goes into an area that might leak oil. If this was a problem, they would have redesigned it years before '70 (or '75).
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So long, farewell. |
#16
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would the oil leak come form somewhere else
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#17
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How bad is it leaking? Was the surface area gouged? Was the '70 engine rebuilt? Could be leaking from the crank seal and slinging all around and winding up on the fuel pump.
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So long, farewell. |
#18
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very little , when i touch the bolt i feel oil . i had all the gasket replaced
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#19
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weird;
I have never seen anything special connecting the fuel pump to the timing cover; If the oil at the back of the bolt was under excess pressure, I could maybe see it seeping along the threads... but this scenario just sounds funny. But hey, I've been wrong before, and I did get my car (also my first car) the year it became a classic...
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#20
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