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To much crankcase pressure - 2010 Chevrolet Equinox

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Blocking pcv positive crankcase venting valve. Remove or hold finger over hole in valve should feel a suction on fonger

Posted on Apr 10, 2015

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PCV valve should be at crankcase or camshaft casevalve cover?


Hi Eric:
Depending on the engine, the PVC has different locations.
There are holes through the block and head that connect the crankcase to the space under the rocker arm/valve cover.
Check to see where your oil filler cap is located. If it is in the rocker arm/valve cover there has to be a way for it to get into the crankcase.
Cheers.

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Transmission dipstick keep popping up 2004 chevy trilblazer


Is it crankcase pressure that causes it to pop-up? If so, check crankcase ventilation system/pcv. It might be possible that you have so much crankcase pressure, that ventilation system can't handle it, then the pressure gets out anyway it can.

On a warm engine, at idle, if you remove oil fill cap, is there smoke coming out?

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1990 Gmc pickup truck has blow back at dip stick , how can I fix ?


Check PCV system. It may be time for the compression leak down test to see if rings are shot.

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Why is it blowing off oil cap


Too much crankcase pressure for some reason? I've seen a melted piston cause so much crankcase pressure, it blew the pcv valve out of the valve cover and sprayed oil all over the engine compartment.

Is your oil cap threaded? If it is threaded, I don't think I've seen one of them blow off? Also, check crankcase ventilation system, pcv where applicable. Do you have a lot of blow-by from crankcase? I don't know your year--make--model or engine size?

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1 Answer

What makes an engine to build up excessive pressure with in.


Hello, Several things could be causing this, but I would start by checking the breather system. The crankcase has to be able to breath. The gasses from the crankcase are collected and piped back to the inlet to be drawn into the engine and burned. The pipes need to be checked for blockages, collapse etc. Other causes can be worn/stuck piston rings and/or cylinder bores. A blown head gasket can also cause crankcase pressure.

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Excessive pressure in the crankcase of a mazda 2005 6


Have you checked the hose from the valve cover to the air cleaner ?
The PCV valve pulls air from the crankcase into the intake, but the crankcase has to get fresh air from the air cleaner too.
If the crankcase is getting extra pressure from the cylinders you should have a check engine light and trouble codes.

Jan 15, 2013 | 2005 Mazda 6

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Why is oil blowing from dipstick of a 1994 ford excort


Here's a link to the pcv valve,could be glogged up causing pressure to back up,Here's the pcv valve.

Dec 04, 2012 | Cars & Trucks

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I have changed pcv valve twice and still getting oil in breather


The PCV valve does not control the oil situation, it just keeps the pans and valve covers from blowing off during a backfire. Excessive Oil in the breather is a result of excessive crankcase pressures, usually due to a worn engine, specifically rings.
SOME oil is normal, especially if you are loaded heavily and hard on the throttle.
There is a tester that measures crankcase pressures, but usually some other manifestation shows, like excessive oil consumption.

the PCV system draws crankcase fumes into the intake at idle and lower throttle situations. air going into the crankcase is filtered by the small PCV filter, where the oil shows up....

At highter throttle and lower intake manifold pressures, the system reverses, the PCV valve closes, and the fumes exit the crankcase VIA the breather filter. All of this is normal.

It costs tons less to periodically clean or replace the PCV filter.

Feb 13, 2011 | 1988 Ford Econoline

1 Answer

Oil is getting on air breather 2004 ram hemi


Hi,
oil getting on a breather can indicate excessive crankcase pressure. Check all the `crankcase breathers and the valve cover breathers.

if the crankcase has been overfilled with engine oil. The crankshaft has to "beat" it's way through the oil and thus acts as a pump and sends oil all over the internal surfaces of the crankcase.

If the engine cylinders have developed 'blow-by" they will also contribute to an increase in crankcase pressure which will be evident by oil in the breathers. The fumes / pressure in the crankcase are designed to be removed by the engine breather system, and drawn through the engine etc.

I hope this info helps.

Jan 25, 2011 | 2004 Dodge Ram 1500

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