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fluctuating oil pressure @ idle - valve cover gasket?

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Old 10-26-2006, 06:52 AM
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Default fluctuating oil pressure @ idle - valve cover gasket?

So my valve cover gasket is definitely leaking, but I was simply curious whether this would cause my oil pressure to fluctuate at idle, or if I just need to get better grounding for the sender. It's always done this, but I've had the oil pressure gauge in the car as long as the gasket has been shot.

Should be replacing this weekend, along with a whole slew of other maintenance items.
Old 10-26-2006, 07:07 AM
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PCV system too maybe?
Old 10-26-2006, 07:11 AM
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Default I don't think a slow oil leak could cause any fluctuation in oil pressure...

Only a big leak could do that
Old 10-26-2006, 07:14 AM
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doubtfull. what are the deviations? do they correspond with idle changes?
Old 10-26-2006, 07:35 AM
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Default Nah. On cold starts I'm probably around 55-60psi, but the needle ends up bouncing quite a bit.

Once the temps are warm, the psi drops and everything smooths out.
Old 10-26-2006, 07:36 AM
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Default I should probably pull the PCV system out and clean it out/look for leaks.

I've got some serious blow-by going on, my BPV is pretty filthy. Something's got to be leaking.
Old 10-26-2006, 07:39 AM
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Default "bouncing quite a bit" = what?

5-10psi? 30-40psi?
Old 10-26-2006, 07:48 AM
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maybe 5 psi.
Old 10-26-2006, 07:54 AM
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ehhh, thats nothing. when was your last oil change?
Old 10-26-2006, 07:58 AM
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Default 6k ago. But it's always done this.

New oil or not. Oil pressure gauge has been in since oh, 70k.

I'll start looking where the oil is coming from. Valve cover gasket is definitely this weekend, maybe I'll be able to tear apart the ventilation system tonight if there's enough light...


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