Thor Oil cap sucking & noise

[Ghind]

Hi All

Please see this video: [ame]https://www.youtube.com/watch?v=jXEvWDpxgpQ&feature=youtu.be[/ame]

1. Is the oil cap suction normal?
2. What is the squealing noise that comes when the cap is on and goes when it is off. Pulling the dipstick is enough to get the noise to stop too

Thanks!

[Eevo]

the video is private

[discovery39]

X2!!!???

[PhilipA]

Sucking is GOOD.
Have a look at the crankcase air inlet which AFAIR has a little non return valve in it, which may be sticking closed.
It is located on the LH rocker cover behind the throttle body.
Regards Philip A

[Ghind]

the video is private

Thanks. Sorry fixed

[Blknight.aus]

crank cae ventilation system is defective, typically the air inlet port/hose ha blocked, occaisionally the reulation valve (if fitted) has stuck wide open.

on the plus side, the engine ise very unlikely to leak oil while its doing what its doing but it will draw any contaminantesin though wehreever the air is getting drawn in so dont go fording with it like that.

[Ghind]

Thank you. I'm not certain which hose you mean, is it the one I've circled in red?

[Ghind]

I've removed & checked the LHS tube and found it was clear & near new. Even with it in place & with those hose clamped back on it, the other end of that hose generated plenty of vacuum & airflow (tested by thumb!)

[Ghind]

[ame="https://www.youtube.com/watch?v=ouCZgtl0QNE"]https://www.youtube.com/watch?v=ouCZgtl0QNE[/ame]

In this video, I've removed the right hand side hose. The suction is huge.

Things of note:

1. There is no spiral filter on this side
2. The brass fitting seems non standard. Does that matter?
3. The suction is coming from the brass fitting. It is sucking so hard that it is making it very difficult to open the oil filler cap


I assume there should be a spiral PCV filter on this side and the lack of filter means that far too much intake suction is being applied to the crank case. Does this seem correct?

The engine is throwing P1171, P1174 and a MAF codes (I can't remember what it is right now) but will look it up.

I suspect this is all related. Thoughts please?

[Ghind]

Swapped it over, sucking fixed. Will report back about codes.

Thanks heaps!