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Location:
Brisbane
Registered:
February 2003
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Re: 4agze Rough Idle/Oil Cap
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Sun, 07 March 2004 08:03
 
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it won't hurt to remove oil filler cap when engine runing (apart from flinging oil everywhere if you rev the crap out of the engine).
the PCV valve should only suck air out of the crankcase at high vacuum (e,g, cruising or decell). it might draw a bit of air at idle but this all academic as a crankcase should have two breathers anyway...
- the PCV valve which only sucks air out
- a free-to-atmo vent that allows fresh air to come into, or in times of exessive crankcase pressure, lets air out of the crankcase - which is why it's usually connected to the intake after the airfilter but before any turbos.
...so if the idle drops when you open the oil filler cap, there's a plumbing error. and if you over-pressurise the crankcase, an important and expensive seal somewhere will eventually fail (e.g. front or rear crankcase seals, turbo seal etc)
see the gallery section of this site and look for diagrams of all kinds...
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| | Subject | Poster | Date |
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4agze Rough Idle/Oil Cap
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monkeymajik | Sun, 07 March 2004 04:57 |
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Re: 4agze Rough Idle/Oil Cap
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thechuckster | Sun, 07 March 2004 05:27 |
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Re: 4agze Rough Idle/Oil Cap
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monkeymajik | Sun, 07 March 2004 05:52 |
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Re: 4agze Rough Idle/Oil Cap
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twincam_ke20 | Sun, 07 March 2004 06:25 |
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Re: 4agze Rough Idle/Oil Cap
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thechuckster | Sun, 07 March 2004 08:03 |
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Re: 4agze Rough Idle/Oil Cap
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EVOSTi | Sun, 07 March 2004 08:01 |
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Re: 4agze Rough Idle/Oil Cap
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mrshin | Sun, 07 March 2004 08:45 |
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Re: 4agze Rough Idle/Oil Cap
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thechuckster | Sun, 07 March 2004 08:50 |
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Re: 4agze Rough Idle/Oil Cap
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hotgemini | Sun, 07 March 2004 08:54 |
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Re: 4agze Rough Idle/Oil Cap
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mrshin | Sun, 07 March 2004 08:55 |
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Re: 4agze Rough Idle/Oil Cap
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thechuckster | Sun, 07 March 2004 10:52 |
