Raw gas in cyclinders and oil? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 11-30-2005, 05:23 PM Thread Starter
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Raw gas in cyclinders and oil?

While I've been tring to get things worked out I've developed a problem. I replaced the points with a electronic ign and while working on getting it back in time it started geting hard to turn over and started putting out lots of black smoke. I pulled the dipstick and there's gas in the oil and next I pulled the plugs again and turned the engine by hand and I had fuel squirt out of a cyl. I then tried one more time and it is very hard to turn over so I quite knowing the hazards that could happen. I know I have to change the oil but how can I be sure there is no more raw fuel in any cyclinders and if there is how do I get it out?

Matt
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post #2 of (permalink) Old 11-30-2005, 06:32 PM
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Re: Raw gas in cyclinders and oil?

Pull all the plugs and spin it - the gas will blow out. Careful - the mist is explosive!

But you need to find WHY the gas got in there. Electric pump?
Floats too high? Mechanical pump allowed gas to get in the crankcase?

Gotta stop the source too.
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post #3 of (permalink) Old 11-30-2005, 09:27 PM Thread Starter
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Re: Raw gas in cyclinders and oil?

I think all the fuel got in from it just running really rich while I had the timing all screwed up. It's got a mechanical pump. I had thought about the float but I haven't changed anything there only replaced the power valve in the carb after blowing it from a backfire.

Matt
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post #4 of (permalink) Old 11-30-2005, 10:25 PM
 
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Re: Raw gas in cyclinders and oil?



DISCONNECT THE POWER WIRE (RED) TO THE IGNITION COIL BEFORE YOU CRANK THE ENGINE WITH THE PLUGS OUT!!

If you don't, things can get unplesant very quickly!
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post #5 of (permalink) Old 12-01-2005, 12:00 AM
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Re: Raw gas in cyclinders and oil?

was there a period of time where you were cranking but could not run? if this is the case, change the oil and go wheelin...[img]/ubbthreads/images/graemlins/grin.gif[/img] i've had engines run really rich before while adjusting things but never put so much extra gas that it fouled the oil and sat in the cylinders

just a thought here...but if it backfired so bad it wrecked your power valve[img]/ubbthreads/images/graemlins/shocked.gif[/img]....do you think it could have done something to the float(a pretty darn DELICATE part in my humble experience)
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post #6 of (permalink) Old 12-01-2005, 12:08 AM
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Re: Raw gas in cyclinders and oil?

"""""had fuel squirt out of a cyl. I then tried one more time and it is very hard to turn over """""
That's more than just running rich or cranking it.

Keep on cranking it with the plugs in and liquid fuel in the cylinders and you'll hydraulic it - bend connecting rods, break pistons or rings etc. Expensive stuff!

FIND THE SOURCE!
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post #7 of (permalink) Old 12-01-2005, 05:08 PM Thread Starter
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Re: Raw gas in cyclinders and oil?

Well I drained and drained and drained and drained fuel and oil out of her today and I ended up getting 3 1/4 Gallons yes Gallons out of the oil pan. That tells me the engine was slap full of gas. There were no metal flakes in the drainings so I guess that was good. Now I've also got to figure out what to do with all this fuel/gas mixtue. Autozoo told me they wouldn't take this. Any suggestions? Now I'll refill it tomm. and spin her over and make sure there's no more in the cylinders and go from there. Could I have gotten that much fuel in it just from turning it over and it not firing?

Matt
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post #8 of (permalink) Old 12-01-2005, 05:14 PM
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Re: Raw gas in cyclinders and oil?

No!
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post #9 of (permalink) Old 12-01-2005, 05:17 PM Thread Starter
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Re: Raw gas in cyclinders and oil?

Thanks Rich, I didn't think so but wanted to ask for sure.
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post #10 of (permalink) Old 12-01-2005, 05:20 PM
 
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Re: Raw gas in cyclinders and oil?

Check the fuel pump. When I had a mechanical pump the diaphram in it broke and fuel was simply pumped into the crankcase. I wouldn't reccomend cranking it any more until you check this. I did and the gas eventually ate away at the oil filter gasket then gas shot out and caught fire. Luckily I keep a fire extinguisher in the garage. Now I keep 2 on the Jeep itself! The pump is a cheap part to replace and also very easy.
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