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Glove still blows up after PCV repair.

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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June
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Re: Glove still blows up after PCV repair.

Post by June » Fri Jul 06, 2018 10:19 am

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
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
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Re: Glove still blows up after PCV repair.

Post by jeffsws » Fri Jul 06, 2018 10:37 am

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?

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June
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Re: Glove still blows up after PCV repair.

Post by June » Fri Jul 06, 2018 12:53 pm

jeffsws wrote:
Fri Jul 06, 2018 10:37 am
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
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

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oragex
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Re: Glove still blows up after PCV repair.

Post by oragex » Fri Jul 06, 2018 1:32 pm

June wrote:
Fri Jul 06, 2018 10:19 am
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.



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Re: Glove still blows up after PCV repair.

Post by jeffsws » Fri Jul 06, 2018 1:42 pm

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

Image

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Re: Glove still blows up after PCV repair.

Post by ThreeBear » Fri Jul 06, 2018 4:01 pm

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.
2004 Volvo S60 2.4L NA 5-Speed Manual (~187,000miles)

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Re: Glove still blows up after PCV repair.

Post by jeffsws » Sat Jul 07, 2018 5:36 am

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...

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Re: Glove still blows up after PCV repair.

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

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.
1999 V70 T5 5-SPD | ~270k mi | burns more oil than gasoline

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Re: Glove still blows up after PCV repair.

Post by jeffsws » Sat Jul 07, 2018 12:56 pm

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?

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Re: Glove still blows up after PCV repair.

Post by j-dawg » Sat Jul 07, 2018 2:22 pm

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.
1999 V70 T5 5-SPD | ~270k mi | burns more oil than gasoline

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