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Oil Trap changed lessons learned V70-XC70 2003

Most of the oil trap writeups on the forums deal with the pre-2001 vehicles.

I figured I would add some lessons learned after I did my v70 2003.

My symptoms of the bad oil trap. Whistling and high suction on the oil cap. Had to use almost two hands to pull off the cap.

As a temp fix I pulled the dip stick out a little and this stopped the whistling, Check engine light came on (lean mixture). Car ran okay, stalled when stopping short but that's it.

Cost of parts About $80. Oil Trap, top hose to a sensor passenger side manifold (its visible), short tube to the block and regular hose claps.

Tools.
Must have a 1/4in drive, extensions, flex (!/4 in each side), 10mm socket.
This is for the manifold bolt near the sensor above. To make more room you can rip the hose off the sensor (this hose will be replaced). Guess you can take the water hose off (i didn't). Real difficult to get the sensor off, the back bolt is too difficult to fool around with.

Need a 3/8in drive extensions and flex 10mm, 12mm.

Biggest issue.

The quick connect on the fuel line. I called every volvo dealer in the area, spoke to the head service managers. No special tool to remove. I was told the connect was a european sytle. Most of the service managers didn't even know what I was talking about and the parts diagram called the piece a spacer.

Part of my problem in removing the connect was that I thought the disconnect was removed from the rail. I now know that the disconnect stays on the rail and that the fuel line (which has only a little play) is pulled from the connect.

To disconnect I ended up having to pull the injector rail out using a pick to release the connect from the line. As a followup I am again contacting Mac-tools and Snapon with a picture of the connect. When I spoke to them they said they didn't have any type of tool for the connect. Possibly seeing picture might help in finding a tool.

Other considerations.

After you remove all the intake bolts (don't remove the bottom bolts they are slotted) you think that the intake will lift out. There is another bracket (bolt 12mm) under the 2nd intake passenger side. You can see it from under the car. I took it the bolt off from under the car but was able to put the bolt back by snaking my arm under the manifold.

When you are ready to reassemble leave the bracket a little loose. This is so you can adjust the bracket to align with the hole.

I did not replace the intake gasket but tighten the bolts fairly tight. It is difficult to use a torque with extensions and impossible to use it on the bolt near the sensor.

When placing the injector rail back on make sure you grease the injector gaskets going into the intake. This will prevent cracking. I used motor oil to lube them. To install the rail line up the injectors push in driver side first working right to left. The connect just snaps in.

Before starting the job, pull the fuel pump fuse out and start the car. This will burn excess fuel in the lines. Also make sure you relieve the pressure using the pin on the rail, passenger side.

Of course disconnect the battery from the rear of the car after you purged the lines.

Make sure you allocate two days to do the whole job.

The check engine light was resolved after I finished.

Good Luck.

Madness









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    Oil Trap changed lessons learned V70-XC70 2003

    740 Madness -

    I just completed replacement of the oil trap, and wanted to add a couple of observations:

    Fuel rail disconnection...

    Where the fuel hard line has a joint in it, I don't think this a quick disconnection fitting, but rather a joint that only allows for rotation of the hard line. When I pulled the fuel rail from the manifold, that joint allowed me to turn the rail upside down, and then remove some torx head screws that hold a sheet metal bracket on the back of the aluminum fuel rail that secure the injectors and the fuel line input fitting (a 90 elbow that is connected to a short piece of rubber hose that is connected to the hard line, downstream from the hard line joint). Once this bracket is removed, then the 90 elbow can be removed (and the injectors too) thus getting the fuel rail out of the way to remove the intake manifold. Then, after the bolts on the intake are removed/loosened, then I tilted the driver's side of the manifold up and snaked the fuel hard line and vent hose through the manifold. Not too difficult, but it takes some patience.


    Throttle Body...
    I removed the throttle body to give me extra wiggle room, and to clean it. I cleaned the inside of the manifold with solvent (Chemtool) and cleaned the intakes on the block which were a dirty too.

    Overall...
    I got the manifold off in less than an hour, the oil trap was replaced in minutes, and the manifold went back on easily, once you know the tricks of removal.








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      Oil Trap changed lessons learned V70-XC70 2002

      Can this job be done without removing the intake manifold? What are the benefits of removing the intake manifold, other than easier access to the oil trap?

      Thanks!








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    Oil Trap changed lessons learned V70-XC70 2003

    Thanks for the post 740madness! I have been having having a rough idle and stalling problem recently, with a whistling sound from the engine (sounded like its coming from under the intake manifold (2001 V70). I noticed the same suction or vacuum present at the oil filler cap and dipstick (very strong). Based on a hunch and some past experience (1800, 240, 740) I started looking for a flame trap, or some kind of similar crankcase ventilation device, but couldn't find it... I searched ALLDATADiy to no avail... and your post was right near the top of the list today. What luck!

    So they've buried the oil separator (aka oil trap) under the intake manifold! Geez! This makes me never want to get rid of my '91 240 or '73 1800ES!!!

    Now I'll have to order the parts and wait until next weekend to devote my time to the tear-down that you have described above.

    Thanks again!








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    Oil Trap changed lessons learned V70-XC70 2003

    Thanks for taking the time to write up the effort. It is starting to make me think twice about any more Volvo's (eight of them todate).
    How many miles on your V70 when the problem was noted????? (I have a 2004).
    Do you think a turbo engine would change the procedure any, after clearing the turbo interferences??? (wife's 2003 XC.
    Thks.








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      Oil Trap changed lessons learned V70-XC70 2003

      I think volvo lately has made simple repairs difficult. The oil trap is a maintenance item at 95K. That was about the miles that the trap went. I got quotes from 400-500 including parts.

      After I lifted the intake out, I noticed the starter/solenoid and I think the egr. I suspect that to replace these you may have to take the intake off. You may be able to work underneath? But the placement and difficulty to replace these items is another example of volvo's repair philosophy. Just my 2 cents.

      Madness








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        Oil Trap changed lessons learned V70-XC70 2003

        I lifted the hood on the 2004 V70 to "just look". Skip that idea. On all the other volvo's I have owned 240 thru 850, they had an assessible plastic screen to replace. I have not been able to locate a picture/skematic of the oil trap on the V70's so cannot answer these questions...... but since you have gone to the edge of the Volvo universe, maybe you know !!!!
        How similar is the v70 oil trap configuration to the old models???? and how it is plumbed??? What did you actually have to repace??? filter screen???
        Now that you know how it is configured and what "needed to be replaced or cleaned............ do you think that disconnecting (?) a hose to the trap at a more assessible location ??? and back spraying it with some WD-40??? would work??? Does the design allow for cleaning?????
        Bottomline: Do you think there is a simpler approach...... knowing it might not clean as well as what you did, but....................
        Thx.








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          Oil Trap changed lessons learned V70-XC70 2003

          There are 3 hoses and a tube. No Flame Trap exists. Two hoses are accessible from the top of the engine. The one located by the sensor last intake passenger side and the one near the oil cap.

          When I removed everything the area where the most crud built up was in the tube which connects from the bottom of the oil trap to the block. This tube is a replacement item along with the tube by the sensor. Of course the whole trap is also replaced.

          There is one more tube which is part of the oil trap itself. This goes into the top of the block. You can't get at it, however once you get an oil trap you'll see what I mean. I believe either fcp or ipd have a picture of the trap on their site.

          To identify it, The trap has a round piece (like one mickey ear) on the top left side).

          I don't think spraying will work but you can give it a try. Some one on Volvo-Forums said that there is a diaphragm in the trap that goes bad. Possibly this accounts for the whistling.

          Good Luck








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            Oil Trap changed lessons learned V70-XC70 2002

            740madness first thanks for the well defined issue and repair info for lesson learned! If you could identify exactly which parts are needed for this repair. I have a link of the oil trap parts associated with this repair. I'm just a little confuse about the "tube" you mentioned in your post. Hopefully you'll be able to assist me. I don't want to purchase parts I don't need. Know what I mean!?!

            http://www.volvopartswebstore.com/images/parts/volvo/fullsize/GR-258104.jpg

            MY 2002 Volvo is a V70 XC AWD

            5 Cylinder Turbocharged 2.4 DOHC

            Thanks in advance for any help, it would be highly appreciated!

            Sincerely,
            Greg








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      Oil Trap changed lessons learned V70-XC70 2003

      Hello, First: Thanks for the write-up. Second: To afm, Don't let one episode turn you off a brand you like. Many cars have a breather/oil trap system. Third: What necessitated the changing of the oil trap? COMMENTS: I use synthetic oil in my '02 non-turbo in the hope of avoiding the accumulation of lumpy chunks in the oil trap box. Replacing such a box and its hoses should be easier (whimp-whimp). Was "our Porsche engine" ever sold without the breather box? Kira








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    Oil Trap changed lessons learned V70-XC70 2003

    Congrats again Bob, I knew you could do it!!! When that check engine light went out, didn't you have a real positive feeling of accomplishment ? So the fire box is different from the older models. The vacuum line coming from the top of the fire box goes where? Sounds like a large vacuum has formed in the engine block. That should stop any smoking. It should also produce more power. It's like a turbo in reverse.
    We will all have your post to look to when we turn the oldies into the retirement heap.
    I glad you had a good experience fixing the fire box.
    Good Luck!!! RK







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