breather valve

[l4jor]

Is there a Engine breather/ vent valve any where on a Monaro? if so I can't find it and when will it need cleaning ? on my old cars they where on the rocker box covers.

[Ferb]

At the back of the rocker covers

[l4jor]

oops.. mist it... I will have a look asap............

[Bonnie and Clyde]

l4jor said:

Is there a Engine breather/ vent valve any where on a Monaro? if so I can't find it and when will it need cleaning ? on my old cars they where on the rocker box covers.

Sorry for ignorance again but what is this. Have never heard of it. Should i be doing something to mine?

[essexhsv]

Your breathers should block up if your using Mobile 1 engine oil or a good equivalent engine oil. Every car i have running oh Mobil 1 oil have never blocked up. Its all to do with the oil and caused by oils that brake down if im right.

[l4jor]

still can't find it... I need a workshop manual

[MadMaxHSV]

On the later GenIV LS2's (ie. 6 litre) the PCV system (crankcase breather system etc) is built into the valley plate which is under the inlet manifold.
Which engine is yours?

[l4jor]

Mine is 05 CV8 with a 5.7 LS1.I have removed the plastic engine covers, but nothing obvious, maybe there is'nt one?

[MadMaxHSV]

They definately have one. If its not connected via the rocker covers as suggested it will be via the valley cover. The whole assembly including the valve is strapped to the underside. To get to it you have to remove the inlet manifold. I thought the 5.7l engines had the earlier system. I have an engine manual for the LS1/LS2 i'll double check.
The later design (ie. valley cover) fixed the high oil consumption issues of the rocker cover fed system which had a tendency to ventilate more oil, meaning a catch can was good idea.

[Ferb]

On the 5.7 there are breather tubes coming out at the back of the rocker covers, (saw them the other day when changing my oil presure sender switch)

[l4jor]

Thanks all, the reason I asked was so I could clean the system out at some point. I believe if the system gets blocked up over time you will blow out the oil seals. sounds a bit more difficult to do than I first thought..

[monkfish1]

l4jor said:

Thanks all, the reason I asked was so I could clean the system out at some point. I believe if the system gets blocked up over time you will blow out the oil seals. sounds a bit more difficult to do than I first thought..

The conventional PCV valve arrangement was deleted in 2004. So you can stop looking!

[MadMaxHSV]

monkfish1 said:

l4jor said:

Thanks all, the reason I asked was so I could clean the system out at some point. I believe if the system gets blocked up over time you will blow out the oil seals. sounds a bit more difficult to do than I first thought..

The conventional PCV valve arrangement was deleted in 2004. So you can stop looking!

What do you mean by 'conventional'. Must be a crankcase breather somewhere surely...

[monkfish1]

MadMaxHSV said:

monkfish1 said:

l4jor said:

Thanks all, the reason I asked was so I could clean the system out at some point. I believe if the system gets blocked up over time you will blow out the oil seals. sounds a bit more difficult to do than I first thought..

The conventional PCV valve arrangement was deleted in 2004. So you can stop looking!

What do you mean by 'conventional'. Must be a crankcase breather somewhere surely...

Yes there is but not PCV valve. Pipe off the r/h rocker cover into the intake pipe and one from the valley plate into the manifold behind the throttlebody. No valve though.

[MadMaxHSV]

Ah ok. Cheers

[l4jor]

Thanks again, I must contiue my quest to find things that don't exist.....

[Bonnie and Clyde]

l4jor said:

Thanks again, I must contiue my quest to find things that don't exist.....

Next, the perfect man for me please babe

[broadslide]

Sorry, busy

[l4jor]

Bonnie, well..er,I can't make a reply to that..well I could but...