2004 XC70 PCV coolant pipe

Post by **shiloh51933** » 13 Sep 2018, 11:00

My wife's 2004 XC70 has had the slowest leak for a while and I never really located it. So a week ago it turned into a major leak and had to tow home since it wouldn't hold coolant long to get her home. Anyway after digging into drivers side of motor I finally found a hose attached to a hard line that had a banjo bolt connection into the block. So after some research I found out that this line is part of the PCV system and is used to help the PCV system from gumming/clogging up. So I'm not paying close to $200 buck's for a 6 inch soft line that is connected to a bunch of other lines. I'm using some silicone hosing in place of soft part of coolant line. And while I was in there I noticed some motor oil seepage from the bottom of exhaust cam sensor/rotor set up at back of camshafts. Anyway after removing cam sensor I found just a little bit of oil but I figured I'd replace now instead having to remove all the intake plumbing /sensors/acuators/brackets/motor mount /strut brace/ect...you get my point.

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Post by **abscate** » 14 Sep 2018, 05:13

Be really careful with that PCV coolant line because the vapour part is plastic and will crack easily.

Put new washers in the banjo fitting and have fun.

Post by **shiloh51933** » 15 Sep 2018, 07:56

abscate wrote: ↑14 Sep 2018, 05:13 Be really careful with that PCV coolant line because the vapour part is plastic and will crack easily.

Put new washers in the banjo fitting and have fun.

I'm actually only replacing the rubber line, not even breaking the seal on the banjo bolt. Napa was actually able to find me the right hose with the 180` degrees bend on it with 1/2" inner diameter. Volvo wanted me to buy the whole crankcase ventilation kit.(VOL-30731068)crankcase coolant hose and pipe assembly for $187.49 on FCPEuro.com

Post by **cn90** » 15 Sep 2018, 08:42

- How many miles on your XC70?

- For the rubber hose: cut the factory Oetiker clamp, install new hose, install new clamps. That is it.

- This design is convoluted and serves no purposes. The hot coolant cannot even warm the PCV pipe enough to prevent mayo build-up. Just funky engineering.

PS: Also, please write a short write-up for future reference.

Post by **shiloh51933** » 15 Sep 2018, 12:43

cn90 wrote: ↑15 Sep 2018, 08:42 - How many miles on your XC70?

- For the rubber hose: cut the factory Oetiker clamp, install new hose, install new clamps. That is it.

- This design is convoluted and serves no purposes. The hot coolant cannot even warm the PCV pipe enough to prevent mayo build-up. Just funky engineering.

PS: Also, please write a short write-up for future reference.

Our 2004 XC70 has 225k on the odometer.
Yeah i can't see any reason to replace the entire crankcase ventilation/coolant pipe because the hose ripped a bit by the clamping location, it's quite common for coolant hoses to tear near the clamp.

Post by **abscate** » 18 Sep 2018, 09:12

I think the reason is the PCV piping is plastic and eventually gets brittle and fails from hot oil exposure. I barely torqued mine and I felt the plastic shatter inside the insulation.

If it is intact, though, I agree its a $200 part you don't need.

Post by **shiloh51933** » 18 Sep 2018, 11:32

abscate wrote: ↑18 Sep 2018, 09:12 I think the reason is the PCV piping is plastic and eventually gets brittle and fails from hot oil exposure. I barely torqued mine and I felt the plastic shatter inside the insulation.

If it is intact, though, I agree its a $200 part you don't need.

I probably would have splurged for this crankcase ventilation/coolant pipe if I did have to buy the turbo intake tube from turbo flange to air box(30680446). The tube melted to the turbocharger flange a bit, so upon removal the clamping section stayed with the turbo flange. I have over the last couple of years replaced just all of the vacuum lines and sensors, valves and fixed up all the wiring harnesses with the plastic loom covering plus electrical tape over everything then put some pull ties in necessary areas. I also replaced the exhaust side rear cam seal while I had everything apart. I had seen just a little it of seepage at bottom of cam sensor.