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Old 12-03-2004, 20:20   #1 (permalink)
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Fuel in the sump... how did it get there?

Has anyone had the problem of getting a slow but steady flow of petrol into their Clevo sump? I have considered where it must be coming from and have come up with a few ideas but no luck yet.

One possibility was through the fuel pump, I replaced it but hadthe same problem.

I doubt it would be through the cylinders as the engine runs so the fuel must be burning.

Has anyone heard of cracking the intake manifold and having fuel seep down through there into the sump?

Any help would be greatly appreciated!
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Old 12-03-2004, 20:42   #2 (permalink)
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Re: Fuel in the sump... how did it get there?

The manifold may not be sealing. Otherwise you have broken rings. Do you have a lumpy idle? As it may not be caused by the camshaft

If your running a bird bath? Piss it off and run some felpro gaskets. Those bird baths are a pain to seal. Especially on an engine thats had machine work done.

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Old 12-04-2004, 06:55   #3 (permalink)
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Re: Fuel in the sump... how did it get there?

Check your float levels and needle seat..Fuel is possibly runing down carb past rings into sump..
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Old 12-04-2004, 08:39   #4 (permalink)
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Re: Fuel in the sump... how did it get there?

Quote:
Originally Posted by ebxr8240
Check your float levels and needle seat..Fuel is possibly runing down carb past rings into sump..
This is one of the most reasonable reasons why you'd flood the engine with fuel assuming that the fuel pump isn't leaking. The most likely case with regard to carburetor is a stuck needle allowing fuel to flow constantly.

Observe the engine at idle with the air cleaner off. If you see a steady stream of fuel flowing, you've found the problem.

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Old 12-04-2004, 15:33   #5 (permalink)
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Re: Fuel in the sump... how did it get there?

How do you know its fuel? Doesnt oil and petrol mix?
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Old 12-04-2004, 15:35   #6 (permalink)
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Re: Fuel in the sump... how did it get there?

Quote:
Originally Posted by northiam
How do you know its fuel? Doesnt oil and petrol mix?
The oil smells funny Like petrol

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Old 12-05-2004, 18:38   #7 (permalink)
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Re: Fuel in the sump... how did it get there?

You haven't said what carby you're running. Can't really tell if you post no info. Is the engine stock? Does it have a Holley? Any other mods?
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Old 12-07-2004, 00:28   #8 (permalink)
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Re: Fuel in the sump... how did it get there?

The donk is a low km's stock 302, (about 176,000). The thermoquad also leaks some fuel out the side.

And as someone already alluded to, the oil gets thinner when there is petrol in it... and yes it smells like petrol. The first time I emptied the sump, the mix shot out horrozontally... for all those of you who have changed oil, which I will assume is everyone, you will know that this is not normal if your sump only has oil in it.
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