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smoking crankcase vent tube...HELP!

This is a discussion on smoking crankcase vent tube...HELP! within the Can-Am / BRP forums, part of the Can-Am ATV Discussion category; Just noticed my wifes crankcase vent blowing smoke,,,it feels like steam and isnt blowing really hard....


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Old 04-09-2012, 08:01 PM
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smoking crankcase vent tube...HELP!

Just noticed my wifes crankcase vent blowing smoke,,,it feels like steam and isnt blowing really hard.
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Old 04-09-2012, 08:04 PM
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There be no steam coming from there


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Old 04-09-2012, 08:09 PM
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What would be the cause...any help would be appreciated.....Blow by? How would i trouble shoot? Just dont want to damage anything
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Old 04-09-2012, 08:14 PM
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Need to do a compression test on the cylinders. Not sure of acceptable numbers. Maybe Mr.RPM a senior member would know the acceptable compression numbers.
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Old 04-09-2012, 08:26 PM
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sounds good any special compression tester for can am?
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Old 04-09-2012, 08:36 PM
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How cold has the weather been?
How high is the humidity level?
How far does it get ridden?
Does rear of engine get too hot to touch (it should)
Try getting it hot and doing an oil change, could well be water/condensation in the oil
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Old 04-09-2012, 08:44 PM
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Thats a good "?" May be able to check and match spark plug threads to one up at a the parts store. They usually have the loan-a-tool program and could help.

I've found that 175 psi is about what your looking for. See this link: Compression Check
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Old 04-09-2012, 08:58 PM
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Thanks crazy sounds like a winner will do...and diesel, my wifes outty is a 500 so should the psi be different?
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Old 04-09-2012, 09:13 PM
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Yes, I would think so but i don't know by how much as the 175 looks to be for the 800's.

I would think that both of the 500's cylinders should be real close to the same numbers though. Wished I could help more. I suggest that you may want to call a couple of the dealers like the ones suggested on this site or your local dealer to get the numbers as it would depend on the make/year/model specifics. I'm not sure how "freely" they will give this type of info out but I would think that MrRPM would be the best bet for an outside source on this type of info.

For instance, the 2012 numbers listed here.
For the 800 - Bore x Stroke 91 x 62 mm
For the 500 - Bore x Stroke 82 x 47 mm
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Old 04-09-2012, 09:19 PM
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Great...thanks for the info...appreciate it
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