Explain to me what is in my catch can.
#1
Explain to me what is in my catch can.
So until now this motor has NEVER had blowby of any sort other than a bit of water condensation (tiny amount) build up here and there. Daily driving, autoX or track stuff. Just never had any to even be remotely concerned about.
I noticed today that there was some stuff in the view tube so I opened it up and poured what seemed like %60 gas %40 froth out.
Here is a terrible photo it dosen't show it that well but more than half of that is basically gas and smells like it too.
Any ideas? Keep in mind this is just from daily driving with the *odd* pull to redline (not a whole lot recently just put putting around). I've smelled my oil on the dipstick as best I can and I don't smell any fuel. So it's coming from somewhere but it does not seem as though the oil is fuel diluted.
I noticed today that there was some stuff in the view tube so I opened it up and poured what seemed like %60 gas %40 froth out.
Here is a terrible photo it dosen't show it that well but more than half of that is basically gas and smells like it too.
Any ideas? Keep in mind this is just from daily driving with the *odd* pull to redline (not a whole lot recently just put putting around). I've smelled my oil on the dipstick as best I can and I don't smell any fuel. So it's coming from somewhere but it does not seem as though the oil is fuel diluted.
#11
This might help
www.miataturbo.net/showthread.php?t=55244
My catch can is only pint-sized (literally...it holds one pint), and I find that it will never accumulate anything during the summer months, but in the winter months, it will accumulate about half a pint per tank of gas.
www.miataturbo.net/showthread.php?t=55244
My catch can is only pint-sized (literally...it holds one pint), and I find that it will never accumulate anything during the summer months, but in the winter months, it will accumulate about half a pint per tank of gas.
#16
I'll have to check that. It's an aeromotive and fairly new but I guess anything is possible.
Catch can is hooked up direct from my valve cover gasket to a vented can.
I've driven it for a week now and was pretty hard on it a few times and so far it seems like there is nothing in there. Perhaps it was an anomaly of some sort. I'll keep an eye on it and update if I get a repeat.
Catch can is hooked up direct from my valve cover gasket to a vented can.
I've driven it for a week now and was pretty hard on it a few times and so far it seems like there is nothing in there. Perhaps it was an anomaly of some sort. I'll keep an eye on it and update if I get a repeat.
#17
If it was fuel, that usually means flooding of the cylinders. For example if an injector was going way rich; unburned gas easily gets past the rings. Your catch can should only be picking up stuff that was in the crankcase.
Look into any and all possible ways to get too much fuel into a cylinder. M2cupcar's question is certainly a possibility, for example.
Alternately, look at how fuel could be getting into your catch can via vacuum or hose routing. But my guess is it came from the sump. You could drain the oil and see what it looks like. Maybe splurge $20 on an oil analysis.
Look into any and all possible ways to get too much fuel into a cylinder. M2cupcar's question is certainly a possibility, for example.
Alternately, look at how fuel could be getting into your catch can via vacuum or hose routing. But my guess is it came from the sump. You could drain the oil and see what it looks like. Maybe splurge $20 on an oil analysis.
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09-05-2015 08:02 AM