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Old 13 September 2008, 04:58 PM
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nullfork
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Question breathers / blowby pressure readings

Hi

Anyone have any idea what sort of pressure I should expect out of the breathers (crankcase / rockers)?

I plumbed in a gauge which reads 0-140 psi in 5 psi steps and it doesn't budge, even when the engine is revved up to 5k...

Reason I ask is I pulled the breathers off the catch can today and there was a lot of fuel smell in them, I take it this isn't normal, and I've started to think the rings have problems !? I've been using a lot of oil recently (well about 700ml per 1000 miles), but having said that I do drive it very hard / high revs..

By the way this is an EJ257 with 7000miles on the clock, which had been run in for 1000 miles.

Stu
Old 13 September 2008, 05:30 PM
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bowsaaa
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Fuel in the oil is normally bore wash (running too rich). My 2.5 breaths heavy but not a lot of pressure in it & no fuel smell in mine either.
Old 13 September 2008, 05:49 PM
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nullfork
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Originally Posted by bowsaaa
Fuel in the oil is normally bore wash (running too rich). My 2.5 breaths heavy but not a lot of pressure in it & no fuel smell in mine either.
I hear ya mate. The car has been ECUtek mapped so will obviously run rich at WOT, wouldn't of thought that would cause bore wash though?

My other theory is I should do a full oil change (contaminated oil), my logic being the car ran factory map for 6500 miles and the factory map is rich anyway..

Although suppose I should do a compression test really...

Stu

P.S. What wheels are you running on your P1?

Last edited by nullfork; 13 September 2008 at 05:56 PM.
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