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Greg
Greg, Technician
Category: Vauxhall
Satisfied Customers: 6806
Experience:  Automotive diagnostic tech
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I have 2003 astra with z16zep engine which is not running properly

Customer Question

I have 2003 astra with z16zep engine which is not running properly on investagation ,thé pipe going from inlet manifold to rocker cover is causing à massive vaccum and drawing oil from thé rocker cover into the inlet manifold
Submitted: 3 years ago.
Category: Vauxhall
Expert:  Greg replied 3 years ago.
Hi .My name is Greg and i will assist you with this problem.

Two posibilitys that cause this on this engine of yours .

1. The PCV is blocked open and letting oil bypass the valve into the inlet manifold
all that has to be done with this is replace the PCV valve .

2. The valve covert baffles are caked up with oil sludge and the oil is getting into the inlet manifold .

3. Low cylinder compression causing high engine bypass into engine and causing oil to be pushed out into the inlet manifold .

First check the PCV, if not sure replace as this is a very cheap part to buy.

Do a compression test to see if the engine compression is the fault ,(with engine running and you remove the oil cap and feel a lot of pressure coming out, then this is your problem .

Do this and get back to me if needed.


My goal is to provide you with excellent service – if you feel you have gotten anything less, please reply back with the reply box below and not the poor or bad service button ,

For further assistance there is no extra charge after accepting.

Rgds Greg
Kindest regards Greg


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