Blowing white smoke
- Thread starter fatjay
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JDAOWNER
Silver Member
WHITE SMOKE COULD BE OIL BURNING. WITH THE DIP STICK BLOWING OUT AND THE OIL CAP BLOWING OFF, I WOULD GUESS YOU GOT WAY TOO MUCH AIR IN THE BASE. I THINK YOU MAY HAVE BLOWEN A PISTON. LIKE WAS SUGGESTED, A COMPRESSION TEST WOULD BE A GOOD PLACE TO START.
airbiscuit
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Time to try your favorite additive!
metalbender
Veteran Member
Where exactly is the blast of smoke coming from? Looks like an internal crankcase pressure build up, not from the exhaust. Excessive blow-by, possibly igniting fuel in the crankcase when a faulty cyl fires. Odd one for sure.
airbiscuit
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To me, it looked like the exhaust outlet. If so, I am thinking an exhaust valve is sticking open on the combustion stroke. Back in the day, we used to pour a little diesel fuel down the carburetor when it was running - or spray in your favorite "miracle" additive.
bearthebruce
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I'm with those that have suggested doing a compression check. As I work for a diagnostic tool company, everyday I see users of our tool pour money into parts that were not part of a problem. Fatjay, as you are fellow Pennsylvanian living on lock down as am I (I'm from Ambler), I would invest in a compression guage and learning how to use it. That would eliminate problems with the pistons and valves.
The fueling issue can produce white smoke but usually when fueling problems occur in a gas engine, the engine does not run well. Often white smoke when it's a fueling issue would come out the the exhaust because the engine is running very lean.
I'm not saying you won't use your gaskets, but the pressure build-up in the crankcase - that is the concern.. Didn't you write that the oil check dip stick and the oil cap blew off? I think the compression check is the way to go. Find why the engine pressures are not right. Remember, an engine is nothing more than an air pump. It sucks the air in and it has to blow it out. If the air cannot go to the exhaust port, then it goes somewhere else... The question is what is causing the diversion.
The fueling issue can produce white smoke but usually when fueling problems occur in a gas engine, the engine does not run well. Often white smoke when it's a fueling issue would come out the the exhaust because the engine is running very lean.
I'm not saying you won't use your gaskets, but the pressure build-up in the crankcase - that is the concern.. Didn't you write that the oil check dip stick and the oil cap blew off? I think the compression check is the way to go. Find why the engine pressures are not right. Remember, an engine is nothing more than an air pump. It sucks the air in and it has to blow it out. If the air cannot go to the exhaust port, then it goes somewhere else... The question is what is causing the diversion.