Oil Tip (?) Removing oil cap during cool-down before storage.

[S2000driver]

I've always noticed light vapors coming out of the oil cap if you open it recently after shutting off the car.

I assume most of the vapor is water, so when I let my car sit for a week or more I remove the oil cap until it cools down.

I can't help but wonder how much of what chemically depletes the oil's additive package happens while the car sits when NOT running, when the vapors eventually condense and join with nitrides to form acid.

Does removing the oil cap get a significant amount of water vapor out of the engine compared to not doing so?

Comments?

[ February 09, 2004, 10:56 PM: Message edited by: S2000driver ]

 

[DavoNF]

S2,

I don't know, never really thought about it.

I will check next time I take mine for a drive. This could be relevent to me, as the car is only driven once a week. I've never really opened the oil cap to check.

Dave

 

[Drew99GT]

On many cars, the vapor is just misted oil, which is used to lubricate rockers/valve tips.

 

[labman]

The oil cap is there to keep dirt out. What if while you are waiting for the engine to cool, you either accidentally or forget and stir up a bunch of dust?

 

[S2000driver]

quote:

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Originally posted by labman:
The oil cap is there to keep dirt out. What if while you are waiting for the engine to cool, you either accidentally or forget and stir up a bunch of dust?

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I'll watch out for tornadoes hitting my garage during the hour of cool-down