P2 PCV Valve

**M-R-P** · Wednesday 30th May 2012, 23:32

It will mate, its blowing straight through the turbo and escaping through the ptc and inlet.
I really don't think it's possible for anything on the compressor to make that sort of noise at that sort of volume.
What about a cracked exhaust manifold or turbo exhaust housing?

**leeboy** · Wednesday 30th May 2012, 23:38

that make shift cap is after the turbo so that pipe goes down to intercooler out top and into manifold. ive not got it going to turbo at all. it simulates the turbo compressing the air in them pipes.

**M-R-P** · Wednesday 30th May 2012, 23:52

Aaah, I get ya!
It may be worth looking at the banjo bolt on the inlet manifold as that's the only place the pcv collects pressure from. Unless you have a lot of pressure in the block, being vented through the pcv. I still don't think it'll cause all that noise though.

**leeboy** · Wednesday 30th May 2012, 23:57

will check tomorrow. cheers

**Harvey** · Thursday 31st May 2012, 06:50

Originally Posted by leeboy

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every time i put some air in it leak out this

Hi this rubber bung will leak air when you put it under pressure as it works under vacuum under Normal use.
The heater unit that goes into the bung that has the plug on it I think the hole is only 5mm.
Also when you put air into the pipe work it will blow into the engine cylinders and out if valves are open .
Try removing the pipe from the turbo that goes to intercooler and pressure rise that one .

**LeeT5** · Thursday 31st May 2012, 21:41

Originally Posted by leeboy

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every time i put some air in it leak out this

It would do mate, thats on the induction side NOT the compressor side. From what you've said about losing boost and your car sounding like a jet engine i would go straight to the exhaust manifold bolts. £10 says there loose...at least 3 of them!

**LeeT5** · Thursday 31st May 2012, 21:48

Two ways to check if your PCV system needs replacing:

1) If your car has done 140k + (and no mention of a PCV replacement in the service history)

2) Pull your dipstick out 1" when the engine is warmed up. If she blows white/grey smoke then the PCV is blocked and in need of replacement.

Tip from the top

Check your 'O' rings on your engine oil dipstick. If you have one 'O' ring then you have the older type dipstick. This will almost certainly blow out if you gun it and your PCV is blocked - result will be 1/2 pint of liquid gold all over your engine bay!!
The later (uprated) type has two 'O' rings. Replace with the new type dipstick and the above will never happen.