Glove still blows up after PCV repair.

Post by **June** » 06 Jul 2018, 10:19

A damaged box? Your edit says you cleaned the box, not put a new box on, correct? I understand the box has a seal that goes bad. June

jeffsws · Post by **jeffsws** » 06 Jul 2018, 10:37

Correct, I reused the existing one. I did clean it quite thoroughly. Even used air to blow everything out. Can't remember the psi - maybe that destroyed it? How does one normally clean these boxes?

Post by **June** » 06 Jul 2018, 12:53

jeffsws wrote: ↑06 Jul 2018, 10:37 Correct, I reused the existing one. I did clean it quite thoroughly. Even used air to blow everything out. Can't remember the psi - maybe that destroyed it? How does one normally clean these boxes?

You don't according to Volvo. Their equivalent to a pcv valve is in that box and it is a throwaway item. June

Post by **oragex** » 06 Jul 2018, 13:32

June wrote: ↑06 Jul 2018, 10:19 A damaged box? Your edit says you cleaned the box, not put a new box on, correct? I understand the box has a seal that goes bad. June

Spot on. The reason why I did this video is exactly that. Did the same on my car, I felt like the box was empty so I though maybe the previous owner already replaced it. Put it back and the glove was still inflating. Bought a new box (and in your car you'll also need new hoses as on the turbo there are passages that cannot be cleaned), installed and now the glove sucks in with force.

jeffsws · Post by **jeffsws** » 06 Jul 2018, 13:42

I may try a new one. But the 850 pcv box is much simpler and probably less prone to failure.

ThreeBear · Post by **ThreeBear** » 06 Jul 2018, 16:01

I just did the PCV on my 2004 S60 NA and the box looked to be in good shape but I replaced it anyway. The holes into the block did not look clogged at all so I am assuming that the issue was with the box itself.

jeffsws · Post by **jeffsws** » 07 Jul 2018, 05:36

What a disaster. Done a dry compression test today in a warmish car (had to drive about 15mins to get there.)

1 ---- 2 ---- 3 ---- 4 ---- 5
130, 135, 140, 150, 135

Then tried for a wet test. Put some oil in 1 and when cranking the car the pressure maxed out... 300+.... And when removing it smoke was coming out of it and number 3. I may have poured too much oil in. I then continued to test 2-5 without oil and each jumped about 20psi anyway.

Doesn't look good to me...

Post by **j-dawg** » 07 Jul 2018, 12:46

How much oil did you put in? What were you doing when the smoke was coming out? From what you're saying, I'd guess that 300+ psi was the result of hydrolocking the gauge (petrolocking??), or at least dramatically reducing the volume of gas being compressed. If your other cylinders were reading differently while repeating the test you'd just done, maybe you damaged the gauge in the process.

jeffsws · Post by **jeffsws** » 07 Jul 2018, 12:56

I've since read it should be about a teaspoon? And if you google teaspoon and look at the example images then i would guess 10+ in my case :/ It started smoking once I removed the gauge. After I tested 2-5 showing the extra 20 psi, I then tested 1 again it showed 300+ still. It is possible I broke it, yes. I then connected the ignition stuff/fuel relay all back and started the car and it burnt the remained oil off, well most of it smoke can out of the exhaust. I'm going to try it again on Monday with a different gauge just to be sure. Does a teaspoon of oil seem good?

Post by **j-dawg** » 07 Jul 2018, 14:22

Yep, a teaspoon or a half cap. Just enough to wet the perimeter of the piston rings. If you're pouring from the bottle directly into the cylinder, definitely too much.

Glove still blows up after PCV repair.

Re: Glove still blows up after PCV repair.