Author Topic: white smoke coming from crankcase vent  (Read 4206 times)

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Offline panteramatt

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white smoke coming from crankcase vent
« on: April 30, 2018, 08:03:23 am »
I have a vanguard 16hp vanny twin. I have the crankcase vent with a hose and a filter on the end. When I start it it has a white smoke coming out of it fairly strong. It doent smell strong like oil and theres no smoke coming from the exhaust and ,y compression is 150 and 158 psi on cylinders. What could be causing this?

Offline panteramatt

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Re: white smoke coming from crankcase vent
« Reply #1 on: April 30, 2018, 10:15:05 am »

Little update. Put my leak down tester on the motor and one cylinder seems to be leaking where the oil drainback hole is next to the exhaust valve. It's only 30% though. No leaks coming from dipstick, exhaust or intake. Could it be a blown headgasket?

Offline BIG AL 202

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Re: white smoke coming from crankcase vent
« Reply #2 on: April 30, 2018, 01:16:40 pm »
Does the smoke stop after running awhile?
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Offline panteramatt

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Re: white smoke coming from crankcase vent
« Reply #3 on: April 30, 2018, 07:45:01 pm »
Ive ran it for about 15 minutes so far and it stays the same. I did notice a lot of condensation coming from the tailpipe this morning but not sure if it has anything to do with it.

Offline PJG56

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Re: white smoke coming from crankcase vent
« Reply #4 on: May 01, 2018, 09:10:10 am »
Little update. Put my leak down tester on the motor and one cylinder seems to be leaking where the oil drainback hole is next to the exhaust valve. It's only 30% though. No leaks coming from dipstick, exhaust or intake. Could it be a blown headgasket?

**Only 30%**
Id be changing head gasket ASAP
Paul Guptill  (oppy) #238modX
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Offline panteramatt

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Re: white smoke coming from crankcase vent
« Reply #5 on: May 01, 2018, 04:50:18 pm »
Is 30% really that bad? Its still well in the green on my gauge

Offline BIG AL 202

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Re: white smoke coming from crankcase vent
« Reply #6 on: May 02, 2018, 08:42:01 am »
On a small engine, YES!
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Offline PJG56

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Re: white smoke coming from crankcase vent
« Reply #7 on: May 02, 2018, 09:24:40 am »
On a small engine, YES!

On any engine its bad
Paul Guptill  (oppy) #238modX
2012 slmra mowstock champion(builder/owner)

2013 slmra mowdified champion(builder/owner)
2013 ARMA national champion Mod-X(builder/owner)
2014 ARMA national champion Mod-X(builder/owner)
2014 All American Champion Mod-X/CP(builder/owner)
2014All American Champion FXT (engine builder)
2014 All American 2nd place SP(builder/owner)
2015 All American 2nd place BP (builder/owner)
2016 OutlawTriple Crown FXT Champion (engine builder)

Offline BIG AL 202

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Re: white smoke coming from crankcase vent
« Reply #8 on: May 09, 2018, 05:47:51 pm »
TRUE!
ALWAYS VOTE FOR ED!   FONGS BROTHER FROM ANOTHER MOTHER!

Offline rotten ron

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Re: white smoke coming from crankcase vent
« Reply #9 on: May 09, 2018, 09:44:33 pm »
I would be concerned if it was 10%

 

anything