Oil Trap service done...oil still being pushed up dipstick

SHO_power · Post by **SHO_power** » 28 Oct 2011, 18:47

I have a 1999 S80 T6 with 286,xxx kms on it. I have replaced the Oil Trap.. I also replaced the pipe that goes from the top of the oil trap to the intake;oil trap and associated seals.... also replaced the banjo bolt and copper washers. I used compressed air to blow out the associated lines. However oil is still being forced up the dipstick tube. It is blowing the dipstick out of the tube and oil all over the top of the motor.

Could there be something I am missing here? Could there be a blockage in the oil pan?? The car still pulls hard and rides nice/quite

Any help would be appreciated!

Post by **precopster** » 28 Oct 2011, 19:06

Hi welcome to the forum.

When you replaced the trap did you push all the crud in the lower port on the block back into the sump? Of course you'll need to change oil afterwards.

I usually use a bottle cleaner. There is a chance that the accumulated crud is still there causing lack of circulation of crankcase fumes. The other possibility is that you have excessive blow-by that can be caused by stuck piston rings or extemely worn cylinder bores. There is a product called Seafoam which can help with this.

When you rev the car with the dipstick removed can a high amount of pressure be felt at the dipstick hole?

SHO_power · Post by **SHO_power** » 28 Oct 2011, 19:13

No I didn't push the crud in the lower port on the block back into the sump. I might have to take my 3rd attempt at this...

What type of cleaner should I use to clean this crud?

I will try to rev it and feel the pressure at the top of the dipstick, and re-post

Here are com pictures of my work s1215.photobucket.com/albums/cc515/shopower/1999%20Volvo%20S80%20T6/Oil%20Trap/

Post by **precopster** » 28 Oct 2011, 19:20

I use a bottle cleaner, you know one of those bristly things that goes into drink bottles and scrapes them out. It's a kitchen thing.

The other option is to pour seafoam or kerosene (at least a litre) straight into the oil trap and hope this pushes the crud away. Use compressed air to force it out into the sump. This may save you some time. Be sure to change the oil afterwards or drain it first then catch all the crud out of the sump plug with a pan .

The oil trap is no more than a series of chambers so make sure it's dry afterwards with compressed air.

SHO_power · Post by **SHO_power** » 29 Oct 2011, 13:22

Ok I took it all apart for the 3rd time and I am convinced that it's not a blockage with the PCV system. I cleaned all the ports in the block and took some pictures. Everthing checks out and dosent looked blocked at all in my opinion.

Have a look see: http://s1215.photobucket.com/albums/cc5 ... 0S80%20T6/

Next steps ? compression test?

Post by **boosted5cyl** » 29 Oct 2011, 15:28

Did you check the PTC nipple?

Highlighted in the red circle. Theres a rubber block of sorts attached to the turbo ducting, vacuum side. Remove the block from the plastic ducting and make sure it's passages are clear. There is a small hole on this that can get crudded. The PTC is covered in a lot of 850 documentation, but not so much in P2 cars for some reason.

If this is clear, then I would do a leakdown test rather than a compression test and see how much blowby you are getting and on what cylinders.

The hole looks something like this, maybe a little smaller on your S80

Post by **precopster** » 29 Oct 2011, 20:34

Just curious, in your title you say OIL TRAP SERVICE DONE, OIL STILL BEING PUSHED UP DIPSTICK

Was the oil being forced up before the PCV service? Or did it happen afterwards.

I would not be addressing this problem with a PCV service as this system handles GASSES and turns them back into vapour. If the oil pressure is so high that it results in spewing out of your dipstick this is a symptom of serious piston ring seating problems. A compression test is where you should be heading next.

SHO_power · Post by **SHO_power** » 29 Oct 2011, 21:40

precopster - Was the oil being forced up before the PCV service?

Yes the oil was being forced up before the PCV service...it is not a result of the PCV service

boosted5cyl - Thanks for the advise on the PTC!! I am going to check the PTC nipple tomorrow.... I do remember looking at it and not seeing a blockage but I will double check

Best bet for the compression test or leakdown test is to take it to the Volvo dealer???

Post by **precopster** » 29 Oct 2011, 23:54

Buy a compression tester with a threaded end, not the rubber ended ones. You can DIY the procedure. Pull the fuel pump relay and take it from there. Check that it doesn't start and then start checking each cylinder. Figures of b/w 150-180 psi are what you would be hoping for, depending on mileage.

SHO_power · Post by **SHO_power** » 30 Oct 2011, 09:54

I had a look at the PTC this morning and it doesn't seem to be blocked as I can blow compressed air through it. However I did notice that the housing around it is slightly broken (see pictures) http://s1215.photobucket.com/albums/cc5 ... lvo%20PTC/

Could this afftect it in any way? I wasn't able to remove it from the turbo piping because I was afraid to break it further. I tryed pulling on it fairly hard but it wouldn't come out. It would spin 360 degress but could get it removed.