98 V70XC, 200k, PCV done - but no clog

James1216 · Post by **James1216** » 26 Oct 2015, 08:22

Hello guys. I have an issue with my PCV system. I Have a 98 v70xc with 200k that I just got. When I checked the PCV system by using the latex glove trick that I found on line over the oil fill it blew up the glove with air pressure. Now I just did the whole PCV kit today form FCP EURO and after I finished I tried the glove trick once again, the glove still blew up with pressure. Nothing looked too plugged up in the old system, maybe a 1/4 plugged with sludge. I pulled the PCV hoses off the back pipe to the turbo to see if something in the the pipe was clogged but the oil fill hole still blew air pressure. Does anybody have any advice on this issue I am having?

Thanks

Post by **kahl** » 26 Oct 2015, 08:34

The lower plug into the crankcase are you sure it was unclogged? The way to tell is you hook up a hose to that flange you should be able to blow bubbles. Are the oil trap top hoses correctly connected? There are some diagrams with the top oil trap hoses in the wrong places.

Post by **cn90** » 26 Oct 2015, 08:48

Search forum for the "return port".

James1216 · Post by **James1216** » 26 Oct 2015, 09:20

I used a shop vac to get any loose flakes out of the holes before attaching new hoses and oil came out of the bottom port from the pressure of the shop vac, so its not plugged. The hoses are on correct. I will research return port.

Post by **abscate** » 26 Oct 2015, 09:28

It might be good to run a compression test to see if you have excessive blow by the piston rings. Thats not good news, but the PCV won't fix that.

Im optimistic its a hose in the wrong place though, especially if the car runs well.

James1216 · Post by **James1216** » 26 Oct 2015, 09:52

Oh Boy!! I think I might have the 2 hoses on the top of the oil trap/box reversed. Im guessing they need to be on the correct port on the top of plastic trap correct? Its not open plastic box inside like I thought, it must have a baffle that separates the two top hose ports?

Post by **cn90** » 26 Oct 2015, 10:03

I posted all info you need for PCV below:

https://www.matthewsvolvosite.com/forums ... hp?t=53448

Post by **abscate** » 26 Oct 2015, 12:52

James1216 wrote:Oh Boy!! I think I might have the 2 hoses on the top of the oil trap/box reversed. Im guessing they need to be on the correct port on the top of plastic trap correct? Its not open plastic box inside like I thought, it must have a baffle that separates the two top hose ports?

Post by **rspi** » 26 Oct 2015, 16:04

abscate wrote:It might be good to run a compression test to see if you have excessive blow by the piston rings. Thats not good news, but the PCV won't fix that.

Im optimistic its a hose in the wrong place though, especially if the car runs well.

This ^^^

I always recommend people do a compression test prior to doing any major maintenance on these cars. If the engine is bad/worn, why do major stuff???

James1216 · Post by **James1216** » 26 Oct 2015, 16:12

Thanks everyone for the information. I did do a compression test last month when I got the car because plugs would die on me. It was fine and since then I have upgraded to OEM plugs, wires, cap & rotor. I only paid $500 for this car because it needed work.....I love this car.