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post #1 of 11 Old 02-04-2017, 04:28 PM Thread Starter
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Engine Drain Plugs

Somehow, my gas tank emptied itself into my Bearcat engine. So now it is severely flooded. Are there any drain plugs that would allow me to drain the engine block? I searched with little success.

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1995 Pantera 580 EFI
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post #2 of 11 Old 02-04-2017, 05:30 PM
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What engine are we dealing with here? Obviously your fuel tank vent line is plugged and that has forced fuel into your engine.


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post #3 of 11 Old 02-04-2017, 07:35 PM Thread Starter
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It's the 550 liquid.

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post #4 of 11 Old 02-04-2017, 07:38 PM
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You need to pull the spark plugs and the vacuum line that works your fuel pump and pull it over several times until no more fuel comes out of the crank case vacuum this will empty the engine without pushing any seals out of it.


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post #5 of 11 Old 02-04-2017, 08:40 PM Thread Starter
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Cool...I'll give a try. So it's a "no" on drain plugs.

Mike

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post #6 of 11 Old 02-04-2017, 08:48 PM
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Originally Posted by Old Fart Mike View Post
Cool...I'll give a try. So it's a "no" on drain plugs.


That's correct. There are no drain plugs. The only direct crank case access is through the vacuum line that works the fuel pump. It's located under the carbs.


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post #7 of 11 Old 02-05-2017, 03:41 PM Thread Starter
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What engine are we dealing with here? Obviously your fuel tank vent line is plugged and that has forced fuel into your engine.


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I just checked the gas tank vent, it's clear.

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post #8 of 11 Old 02-05-2017, 03:57 PM
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I just checked the gas tank vent, it's clear.


If it's not plugged with something then there's a restriction somewhere that's not allowing it to vent.


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post #9 of 11 Old 02-05-2017, 07:21 PM Thread Starter
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What else could it be? If it's not plugged then it vents ok?

Mike

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post #10 of 11 Old 02-06-2017, 03:26 PM
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Originally Posted by Old Fart Mike View Post
What else could it be? If it's not plugged then it vents ok?
Bad needle/seat in one of the carbs (or sunk floats, but that's less likely). Had this happen to my dads '97 ZL440. Not terribly hard if you're inclined to do it yourself. There's a few things that can get you into more trouble, and an experienced mechanic could save you. I'm sure they're plenty on the subject to search for so I'll skip the tutorial. I'd get new gaskets while you're into them (and maybe just rebuild your fuel pump while you're at it).

Edit: I should elaborate a bit in the event you don't understand. In the bowl of the carb is a needle and seat assembly that interacts with the floats. It regulates the fuel going into the carb. As the bowl fills, the floats raise a lever and close the valve. When that sticks open (from wear, gummed up, etc), the fuel can flow uninterrupted (often as a syphon) which will cause fuel to flood the carb and flow into your engine. Did you notice gas in the engine compartment too? The carb bowl is vented with two pieces of fuel line, and you should have had gas spilling out of those as well. I had a couple of gallons of gas on my trailer and garage floor when it happened to me. It can be an intermittent problem as they will free up and then stick again down the road.

Last edited by DDIESEL952; 02-06-2017 at 04:06 PM.
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