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Location:
NSW
Registered:
September 2003
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GZE Stalling without oil cap
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Mon, 03 January 2005 22:39
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On the weekend I started the GZE in my crashed AW11 that has been sitting for some time in a mates yard.
After a lot of cranking the car started and seemed to run fine although there was quite a bit of noise from under the rocker cover near the oil filler which I'd never noticed before.
I removed the oil filler cap and it nearly blew out of my hand. There is a lot of air pressure coming out of the oil filler hole. After the cap was off for a few seconds the engine seemed to loose vacum and stalled. If I put my hand over the oil filler the revs picked up again.
Could anyone give any idea of what may have caused this. The driveshafts are out of the box and it is empty of gearbox fluid but I wouldnt think this has anything to do with the problem.{Worried}
AdamS
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Location:
cambo
Registered:
May 2002
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Re: GZE Stalling without oil cap
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Tue, 04 January 2005 05:43
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the first thing you should be worried about is the pressure in the crankcase. this tells you your pistons or piston rings are fucked. thats your major convern not the factr it wont run with the oil cap wtf does that matter?
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Location:
Adelaide
Registered:
May 2003
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Re: GZE Stalling without oil cap
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Tue, 04 January 2005 06:20
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i agree with EVO sti. definetly have some serious blow by issues there. sounds like there is only just enough compression in the cylinders to make the car run if it dies with you hand removed.
the only thing to really cause blow by is rings or piston.
how severe is the crash??? did it damage any of the engine??
id be doing a compression test on the motor to find out where compression is at....sounds to me like you could have a dead GZE on your hands.
ps a mate drove 300km with no oil cap on, didnt affect the running at all. just made a bloody huge mess on engine, from oil.
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Location:
Canberra
Registered:
May 2002
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Re: GZE Stalling without oil cap
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Tue, 04 January 2005 06:47
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Let me guess, its an AFM version GZE? removing the oil cap allows the engine to breathe un-metered air, hence the stalling. Your crankcase system is usually fairly well sealed until you remove the cap  Its not unusual, but the large amounts of blowby does suggest a fairly tired motor.
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Location:
Adelaide
Registered:
May 2003
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Re: GZE Stalling without oil cap
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Tue, 04 January 2005 06:52
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ah good work te72 turbo. didnt think of that. air going into air intake tthrough pcv hose. nice going....that would cause lean indication and no smooth running
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Location:
NSW
Registered:
September 2003
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Location:
Adelaide
Registered:
December 2004
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Re: GZE Stalling without oil cap
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Tue, 04 January 2005 11:36
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If the engine has been sitting for a long time the rings may have bound up - this is actually reasonably common.
Try this:
Pour a small amount of oil in through each spark plug hole.
Let it sit for a while (~10 mins).
Crank her up.
You can expect it to be pretty smokey for a while but should settle down after a minute or two. In many cases this can free up bound rings and get things going again.
If not you can send me the head and supercharger pipework 
Let me know how you go
-Terry
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: GZE Stalling without oil cap
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Tue, 04 January 2005 11:45
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have you done a compression test on the engine?
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