Has Anyone Ever Replaced an Undamaged P2 Evap Vapor Canister

[packetfire]

Like the subject says - has anyone ever had to replace a P2 chassis Evap Canister that was undamaged? I can't imagine the thing running out of charcoal, and if it is not flooded with fuel, and if it is undamaged due to road hazard or accident, I can't see any reason to replace it?

But do they "wear out"?

Mine is a 2004 v70 with only 200K miles.

I ask because I must replace a leaking J-hose, so I will replace both the J-Hose and the Vent hose on general principals, but I see no reason to replace the fancy testing pump, or the filter on the end of the vent hose.

But this photo of an eBay junkyard Evap canister and associated hoses claimed to be pulled from a v70 shows more than the 2 hoses documented. Can anyone ID these parts? They do NOT match the diagram most often referenced (also attached below).

The J-hose and vent hoses have been cut on this butchered removal, the test pmp is there, but what is that cone-shaped item?
And what of the connecting hoses to the cone-shaped item?

I know this is a massive pain to get at, so I only want to do this once, so I want to make sure that every hose is replaced on the first try.

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evap_parts.pdf

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[abscate]

No reason to replace these. Just do the hoses. I think the cone thing is part 36 in your diagram, a buffer or protector for the leak detection pump

There are three connections on the P2 not very well shown on the diagram

Vacuum to purge from front
Supply air from the canister purge ( allows clearing of the canister)
Test pressure air from the pump.

Using positive pressure for system testing is much more robust than the vacuum test system on P80s. Note how purge valve and P04xx codes are rarely reported here.

[packetfire]

Thanks so much for your insight, but the white object in the photo is the test pump (5), on its bracket (so the conical object can't be the pump).

There are three connections on the P2 not very well shown on the diagram:

Vacuum to purge from front
Supply air from the canister purge ( allows clearing of the canister)
Test pressure air from the pump.

1) Vacuum to purge from front - hose #18 on diagram the "plastic pipe" to the purge valve (which hides under the intake manifold)

2) Supply air from the canister purge - this has to be the vent hose, #20 on the diagram, but note that there is also #7, (volvo part 8631637) also listed as "hose", but with no fitting shown to attach it to the #20 vent hose. When you look it up by part number, https://usparts.volvocars.com shows it as used on all P2 v70s, and illustrates it as a hose with a 30-degree diagonal transition in the middle, like the path taken in a "lane change", so it goes around something. But #20 and #7 are two different hoses, and the diagrams show that #20 simply plugs into #7, with no clamp other than a plastic cable tie, raising questions about how a vacuum is held. One presumes that one wants to pull the air in through the filter, #19.

3) Test pressure air from the pump. That's #6 - the J-Hose, 8677109

But where does all of this connect to the GAS TANK??? The only part (looking at the list associated with the diagram below) that seems a good suspect is #48 "Air Tube", but they do not show where this attaches on either the "tank" diagram or the "carbon filter" diagram. So how does the carbon filter connect to the fuel tank to get fumes?

fuel_tank.pdf

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Here we have the same Air Filter shown as part #29, but look at all the hoses here, #30 , #28, #27 (9470373)...

A different view is shown here:

tank_evap.jpg (69.16 KiB) Viewed 2536 times

But part #34, which looks like the connection to the charcoal canister is NOT LISTED! (see
https://usparts.volvocars.com/a/Volvo__ ... 78648.html )

and #11 seems to be the filter associated with the carbon filter. The diagrams are just a mess here.

[packetfire]

Update (for other poor souls fighting this issue):

I called FCP-Euro, IPD, and a Volvo dealer.
Both FCP and IPD had the J-Hose, only FCP had the vent hose. And the vent hose is not what one thinks:

evap_parts.pdf

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I have a VIN that includes "64A", so the Evap and emissions gear is "type A".
In the diagram, the J-Hose is part #6 (Volvo Part #8677109), and it is shown with the cut-away in the diagram, note the rough edges on the elbow-shaped part labeled "6", and the longer part of the hose that runs the length of the evap canister.

The vent hose is part #7 in the diagram, not part #20 - part 7 is Volvo #8631637, and it is a hose that includes a jog in the middle. It attaches to the plastic pipe (#20) that goes up to the fuel-filler vent (#19). And here is the fun part - it attaches with a ^%$#@$ PLASTIC CABLE TIE to the plastic pipe, shown as part #9 in the diagram. How this is supposed to be a leak-free fitting, I have no idea, but I guess a clamp would be tightened to the point of crushing the plastic pipe.

The consensus is that very few people buy the vent hose, and lots and lots of people buy the J-hose, so the J-hose is the likely suspect. But given that one must drop down the exhaust just to see the hoses, replacing every hose one can seems most prudent.

And don't ask how the evap system attaches to the fuel tank. No one can say, and the diagrams for both the Evap and Fuel tank are not clear, but I am assured that it is not a part that anyone (even the dealer) gets much call for. I assume it is part #34 in the fuel tank diagram in one of my prior posts above, but no one wanted to confirm.

The EVAP system is caveman simple, but so poorly documented, I had to spend hours to simply verify that I was ordering the correct hoses! (Briefly, the fumes from the fuel tank are pulled by intake manifold pressure when the engine runs into the canister or can flow there as temperature changes or when fuel is filled. When the car runs, the purge valve opens up at higher rpms, to inject those fumes into the intake manifold, where they are burned. The pump is only there for diagnostic purposes, and to allow excess air (and fumes!) to be vented during fueling, as there is nothing else one can do with such a quantity of air/fumes. The pump includes the vent solenoid valve. The purge valve is hidden under the intake manifold on my car, but some are lucky enough to have it out in the open. mounted on the side of the cooling fan.

[abscate]

Yes, tube 34 is the connection from tank to canister. The actual operation of this system is really simple, it’s the self diagnostic testing that adds all the complexity