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Definitive way to make sure fuel pump diaphragm is bad? #714393
06/02/10 05:54 PM
06/02/10 05:54 PM
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Pat_Whalen Offline OP
super gas
Pat_Whalen  Offline OP
super gas
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Just curious. I drained my oil a while ago to repair my rear main seal issue (didn't fix it by the way) and the oil had an aroma of gasoline and was definitely dirtier/browner than it should have been. The engine only had a couple of hours of run time on it and zero miles on the road.

Is there a proof-positive way of knowing if the diaphragm is my fuel pump is leaking fuel into the crank case? Or is this just something that one "guesses" at? If it's of any help, the fuel filter that sits on my manifold and feeds the carb fills up momentarily and then quickly goes to looking empty, although the engine will continue to run.

Re: Definitive way to make sure fuel pump diaphragm is bad? [Re: Pat_Whalen] #714394
06/02/10 07:51 PM
06/02/10 07:51 PM
Joined: Oct 2003
Posts: 7,506
Az
Crizila Offline
master
Crizila  Offline
master

Joined: Oct 2003
Posts: 7,506
Az
Stock fuel pumps are cheap. If the oil smells like fuel, change it - the oil too.


Fastest 300
Re: Definitive way to make sure fuel pump diaphragm is bad? [Re: Crizila] #714395
06/02/10 09:51 PM
06/02/10 09:51 PM
Joined: Sep 2007
Posts: 14,889
up yours
Supercuda Offline
About to go away
Supercuda  Offline
About to go away

Joined: Sep 2007
Posts: 14,889
up yours
You could find out like I did on my 65 Cuda, the crankcase ended up with about 4 extra quarts of gas. Wondered why it kept stalling out on me


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: Definitive way to make sure fuel pump diaphragm is bad? [Re: Pat_Whalen] #714396
06/02/10 09:56 PM
06/02/10 09:56 PM
Joined: Jan 2003
Posts: 6,497
N.E. Ohio
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KillerBee Offline
master
KillerBee  Offline
master
K

Joined: Jan 2003
Posts: 6,497
N.E. Ohio
What type of pump is it?
Some can be disassembled, inspected, and rebuilt.







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