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Location:
NSW, East Coast
Registered:
July 2003
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4age (bigport) vac/diagram
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Fri, 16 April 2004 15:50
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Im having trouble with my pcv and im stuffed anyone kow where i can get info, ive already tried the 4ag book and it hardley says anything about it.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4age (bigport) vac/diagram
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Sat, 17 April 2004 07:22
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 you mean the bit of hose that goes from the cam cover to the plenium?
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Location:
Sydney
Registered:
January 2004
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Re: 4age (bigport) vac/diagram
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Sat, 17 April 2004 08:31
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Theres only one breather as feral is saying. No valve as such, as in many cars. What do you wanna do with it.
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Location:
NSW, East Coast
Registered:
July 2003
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Re: 4age (bigport) vac/diagram
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Sun, 18 April 2004 01:12
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To cut a long story short, if i leave the pcv hose connected i get a terrible squeal coming from the motor, but if i remove the pipe to squeal goes away. The motor was rebuilt with new rings and bearing about 10,000kms, perhaps theres not enough blow by due to the new rings.
When the hose is on and the motor is at idle, if i remove the oil cap is sounds very similar to opening a radiator while its still hot. But its not pressure, its vacumm.
Ive come to the conclusion that the inlet is trying to suck more oil/gases from crankshaft then there is in there causing this vacumm.
Perhaps the pcv is stuck open allowing full suction thru the pcv, perhaps if i found another twin cam motor that doesnt have this problem, pull their hose off and feel how much suction there is thru the pcv.
So the 4ag motors only have an outlet hose, no breather hose or pressure/vacumm release.
Steve
[Updated on: Sun, 18 April 2004 01:17]
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