| [ Total Views: 834 | Total Replies: 11 | Thread Id: 95046 ] |
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 bluebus
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| posted on January 27th, 2012 at 08:08 PM |
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Fuel in the engine... how to fix?
I made the embarrassing error of parking my 66 beetle with its nose up a steep driveway last night. Today, stinks of petrol and went "clunk" when I
tried to start it. And the oil dip stick reads ridiculously high.
So it seems my fuel pump is at least somewhat dodgy (although it's never been an issue until now), which I'll deal with later. In the meantime, how
do I deal with all this petrol in the engine? Obviously I'll need to drain the oil, but are there other things I should do before putting fresh oil
in? Is this likely to have done anything terribly nasty?
Flat parking spots from now on 
66 Beetle & 66 Austin 1800... makes for a very stylish footpath  |
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 helbus
A.k.a.: Pete S
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| posted on January 27th, 2012 at 08:20 PM |
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I have had this happen once on our Beetle.
I rolled to a flat spot.
I drained all oil/ petrol mix.
Refilled the oil to correct level.
6 years later and the engine has shown no problems.
When parking with the nose up high, the float level valve can allow fuel to seep from the tank. This is due to the angle, and the tank being higher.
No big deal, it can be fixed in 10 minutes.
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bluebus
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| posted on January 27th, 2012 at 08:25 PM |
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That's a relief!
Thanks for that, I now know what I'll be doing tomorrow!
66 Beetle & 66 Austin 1800... makes for a very stylish footpath |
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Craig Torrens
A.k.a.: Craig Torrens
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| posted on January 27th, 2012 at 09:58 PM |
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Its possible to "hydraulic" the motor and bend a conrod............turn it over by hand first to bleed the fuel out of the cyclinders
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68AutoBug
A.k.a.: Lee Noonan
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| posted on January 27th, 2012 at 11:06 PM |
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| Quote: | Originally
posted by bluebus
That's a relief!
Thanks for that, I now know what I'll be doing tomorrow!
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You need to drain the oil first...
You also need to take the spark plugs out so the pistons can go Up & down
its usually only one cylinder that fills with fuel [I think]
maybe two?? if the inlet valves are open...
You need to stop any further fuel from filling the cylinder [s]
disconnect the fuel line going to the carby...
cheers
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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Mattriots
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| posted on January 27th, 2012 at 11:31 PM |
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Yeah as the lads said, the tank just empties through the carb cos the tank is at a higher point
Happened to me too, just change the oil, drive for a couple of days, chance the oil again
Repeat this if the dipstick still smells like fuel, and feel free to use cheapo oil if you gonna dump it in a couple of days
You don't want any fuel left in the oil, cos it'll end up washing your bearings out! Not good
But all should be fine along as you don't keep driving it like it is for months!!
Good luck!!
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bluebus
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| posted on January 28th, 2012 at 05:21 PM |
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Fantastic, thanks guys
66 Beetle & 66 Austin 1800... makes for a very stylish footpath |
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type3lover
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| posted on January 28th, 2012 at 05:42 PM |
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This exact same thing happened to me once in my 76 bay kombi. The engine wouldn't turn over due to the hydraulic lock in cylinder 1.
Just one extra thing to think about if you decide to remove the plugs and crank the engine to push out the fuel in the cylinders.....DISCONNECT THE
COIL to ensure there is no risk of a spark igniting all that fuel!
I learnt the hard way. Fortunately the only fire damage was to the alternator and tail lamp wiring.
.
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VolksVair
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| posted on January 30th, 2012 at 09:26 AM |
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I think this serves as a good reminder to fit an electric fuel shut off valve, so that every time you turn your motor off, the valve locks off the
fuel supply. This item can be purchased from any LPG gas centre. I think this is an absolute must for kombis, as the petrol tank is higher than
the motor. cheers Frank
Adventure Before Dimentia
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donn
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| posted on January 30th, 2012 at 02:45 PM |
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Surely this problem only occures if there is a fault in some other part of the system (needle seat ?). The tank in the wench is almost directly over
the engine and so is always higher than the carb, so far I have never had the problem.
I dream of a day when a chicken can cross a road without being asked for it's motive!
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Purple Martin
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| posted on February 1st, 2012 at 02:25 PM |
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To empty the fuel out of the cylinders, turn the engine over by hand BACKWARDS two revolutions: turn the crank pulley two full turns anticlockwise (on
a type 1 engine you can turn the generator pulley four full turns anticlockwise). Now your cylinders are empty and you won't break a rod when you
start the engine. BUT now your exhaust has petrol in it.... make sure no people or dogs are standing behind when you start it, because a lot of dirty
sooty petrol is going to get blasted out of the exhaust.
ALSO
You *must* change the oil before running the engine otherwise it will wear really fast because the petrol in the sump has washed the protective oil
off all the surfaces.
No the problem is not the needle valve: it's just that when the carb is tipped up (by parking nose up) the petrol can flow over the rear edge of the
float bowl and down the throat into the engine, filling cylinders and then leaking past the cylinder rings to fill the sump as well. The needle valve
is further forward in the float bowl, so by parking uphill you've raised the needle valve higher than the rear edge of the float bowl, hence the fuel
overflows.
1959 red & white Beetle
1975 Kombi camper
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donn
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| posted on February 2nd, 2012 at 11:22 AM |
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| Quote: | No the problem is
not the needle valve: it's just that when the carb is tipped up (by parking nose up) the petrol can flow over the rear edge of the float bowl and
down the throat into the engine, filling cylinders and then leaking past the cylinder rings to fill the sump as well. The needle valve is further
forward in the float bowl, so by parking uphill you've raised the needle valve higher than the rear edge of the float bowl, hence the fuel overflows.
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So this problem has existed since the vehicles have been in existence, from new?, yet my engine dosn't have the problem (twin port single standard
carb) to my knowledge, and it is parked nose up quite often, how long would it take to get enough fuel into the engine to cause a problem? I would
think ANY fuel in the oil would be not a good thing, or does it only get into the combustion chamber? yet there is mention here of the oil smelling of
petrol.
I dream of a day when a chicken can cross a road without being asked for it's motive!
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