P2 PCV Valve

**dave stew** · Thursday 2nd October 2008, 17:22

This is a daft question - the P2 T5 also has a PCV valve, doesn't it? I know that there's a lot of discussion re the valve on the 850 T5.

I now have 142k up and am looking to best preserve my hearse. Is the PCV as critical on these?

Is there a list of service items?

I have had the front crank seal done last year; the rear will be done soon with the clutch as a precaution - it's not leaking.

**t5owner** · Friday 3rd October 2008, 16:14

Yep it sure does dave

Same / similar set up to the P1`s and all the pipes do roughly the same thing as on a P1

Cheers

stuart

**cornclose** · Monday 29th June 2009, 21:51

So what does it do on the p1's, and is there a procedure for cleaning/renewing the p1 PCV stuff that can be applied to the p2's ? Or is the p2 procedure totally different ?

Sorry for the n00b type of questions, but I'm affraid I need to ask...

[Edit:] Oh, and where is it exactly, what does it look like! (sorry)

**uzyg** · Friday 3rd July 2009, 14:54

Would the s60 2.0T 52plate have this PCV valve?

**Rufe** · Friday 3rd July 2009, 15:14

Valve is probably the wrong word, its generally referred to as the breather box or oil trap that you are referring to here (number [1] in the below diagram). There is a PCV system on most turbo engines these days, it stands for Positive Crankcase Ventilation, basically the engine oil breathing system, when this gets blocked it can cause a lot of extra pressure in the engine, which in turn can force oil out of seals, like rear main oil seal, rocker cover, oil cap seal etc. Uzyg, yes your car has this set up, as does your car Dave, as shown here:

Click to see its full size:

The kit that we sell for these cars includes numbers, [1] [2] [4] [6] [7] [10 x4] and a new inlet manifold gasket which is not shown. For Pre ME7 cars we would allways supply number [8] too, though on the 1999 models and newer that hose is around £100 on its own, so most people don't change it unless absolutely necessary, most opt to clean it out. You do get new seals for the coolant pipe (number [10]) meaning you can take it off to clean and then refit. This whole job is not a huge job, but quite time consuming for most people. The inlet manifold has to come off to get to these parts (Which is why i include the inlet manifold gasket if course) though I have seen lots of good information of how to do this job on various forums.

If anyone wants a price for this kit please email me frfvolvoparts@gmail.com or send me a pm here if preferred. Please include the registration number of your car as there are some variances depending on exact model year and engine etc. The Reg number will help me a lot.

Off the top of my head you are looking at about £50 approx for a 1999 on model T5 (p1 or p2), another £100 approx (i have to double check so dont take this as gospel) for number [8] in the diagram if required. For Pre ME7 (up to and including most 1998 models) your looking at about £70 delivered roughly for the full kit, including its version of the number [8] pipe. The difference is that the newer models have a heated PCV system, with an added coolant pipe incorporated into the design, but it does make it much more pricey then unfortunately.

Many thanks, I hope this helps

Simon

**Rufe** · Friday 3rd July 2009, 15:19

here is some more info on this you may find useful:

Simon

**cornclose** · Friday 3rd July 2009, 15:29

Thanks Simon, that's really useful info. I guess this is not part of any service schedule, so is unlikely to have been done... ?

**Rufe** · Friday 3rd July 2009, 15:43

Though no parts are automatically changed, on the service schedule it states it should at least be checked and cleaned every 96,000 miles on most later engines, (90,000 miles on earlier cars with 10k service intervals). volvo dealers (and i suppose most specialists) will have this on their service sheets, garages outside volvo may not be so keen to do this it has to be noted.

**uzyg** · Friday 3rd July 2009, 16:29

I can find a few guides/wrte-ups on how to do this yourself but they are all for the volvo 850 or older c70...anyone know of a detailed guide that has been carried out on a phase 2? preferably the s60
.

Much appreciated

**LeeT5** · Wednesday 18th November 2009, 16:13

Watch this space as i have said PCV system in a bag, in my garage, just about to be fitted. Total cost: £155 inc VAT and 10% discount. I will post photos and a 'How to' very soon. Will do it today (if i can be arsed).....

**dave stew** · Saturday 21st November 2009, 09:29

Good darts! I look forward to it. I notice that I originally posted this thread a year and 10,000 miles ago...

**leeboy** · Wednesday 30th May 2012, 22:32

sorry to bing this up but should the ptc nipple flow alot when the system is under pressure? i seem to be losing alot of boost through this.

**M-R-P** · Wednesday 30th May 2012, 22:39

Are you sure mate? What brought you to this conclusion?
There will be boost lost through they ptc but it won't be much.,

**leeboy** · Wednesday 30th May 2012, 22:45

i been trying to find out why my cas sounds like a jet engine when on boost and it sounds awefull. did what was sugested of taking an intercool pipe off and cap it with a valve and fill with air to find a boost leak. heard it through the a filter and traced it back to that and when i removed it, it lost alot of air through it very quickly.

**leeboy** · Wednesday 30th May 2012, 22:47

this is what was done and link in this link to my original problem with video

http://www.vpcuk.org/forums/showthre...ght=boost+leak

**M-R-P** · Wednesday 30th May 2012, 22:51

Do you have a standard air filter?
The ptc isn't on they pressurised side of the turbo. They vacuum caused by they turbo will draw vapour from the pcv system. If you pressure test that side, you will lose air from they ptc.

**Harvey** · Wednesday 30th May 2012, 22:55

Hi the banjo bolt on the inlet manfold has a very small hole which would not cause you to lose any boost,
The pcv pipe from fire box /flame trap to the turbo is in the low pressure side so this would not cause it .

**M-R-P** · Wednesday 30th May 2012, 23:06

Originally Posted by Harvey

Hi the banjo bolt on the inlet manfold has a very small hole which would not cause you to lose any boost,
The pcv pipe from fire box /flame trap to the turbo is in the low pressure side so this would not cause it .

And that banjo bolt is the most common blockage on the P2 pcv system.

As for the noise, if it's not a combination of a noisy induction system and a kickass exhaust then I don't know because it's not likely to be anything on the compressor side of things.

**Harvey** · Wednesday 30th May 2012, 23:08

Hi have Heard of a noise when the engine is running under load that the vacuum in the engine from the pcv system will suck air in throught the shaft oil seals which can cause this type of noise to test just pull the oil dipstick out a inch or so .