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Charcoal Canister Replacing
 
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Pelican Technical Article:

Charcoal Canister Replacing

Nick Czerula

Time:

3 hours3 hrs

Tab:

$250

Talent:

***

Tools:

12, 13mm sockets, flathead screwdriver, 4mm Allen, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

Volvo V70 (1998-01)
Volvo V70 2.4T (2001)
Volvo V70 AWD (1998-99)
Volvo V70 GLT (1998-00)
Volvo V70 GLT SE (2000)
Volvo V70 R (1998)
Volvo V70 R AWD (1999-00)
Volvo V70 T5 (1998-01)
Volvo V70 X/C (2001)
Volvo V70 X/C AWD (1998-00)
Volvo V70 X/C AWD SE (2000)

Parts Required:

Charcoal canister

Hot Tip:

Be careful when working with evaporator system, do not damage any hoses or connections

Performance Gain:

Repair evaporator system faults

Complementary Modification:

Replace evaporator hoses

With increased federal emissions standards, Volvo has been required to decrease both tail pipe emissions and the evaporative emissions. Evaporative emissions consist of volatile organic compounds (VOC), such as hydrocarbons from fuel and engine oil, both of which vaporize and can escape from the vehicle into the atmosphere if not recovered.

The charcoal canister is an emission control device and consists of a sealed plastic canister of activated charcoal with hoses and lines at the side. It's used as a temporary storage device for fuel vapor or HC (hydrocarbon) from the fuel tank. This prevents excess fuel vapors from exiting the fuel tank and entering the atmosphere.

When the engine is off, fuel vapor from the fuel tank passes through a vent line into the canister where it is absorbed by the charcoal. When the engine is running, the fuel vapors are routed to the engine via an electronic solenoid and drawn in by intake manifold vacuum. The fuel vapor is controlled by the DME using a programmed duty cycle in order to maintain proper fuel mixture.

The charcoal canister is located on the right side of the vehicle, next to the muffler.

Remember that your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Jack your vehicle and support it using jack stands. See out tech article on jacking your vehicle. Always wear your safety glasses whenever you're working under your car.

The charcoal canister (red arrow) is located on the right side of the vehicle, next to the muffler (green arrow).
Figure 1

The charcoal canister (red arrow) is located on the right side of the vehicle, next to the muffler (green arrow).

Start by disconnecting the vent solenoid electrical connector (red arrow), located next to the fuel filter (green arrow).
Figure 2

Start by disconnecting the vent solenoid electrical connector (red arrow), located next to the fuel filter (green arrow). Press the release tab and pull the connector straight off.

Working at the rear of the charcoal canister, remove the two lines (red arrows).
Figure 3

Working at the rear of the charcoal canister, remove the two lines (red arrows).

Start with the smaller one.
Figure 4

Start with the smaller one. Press in the tab and hold while pulling the line straight off.

Move to the larger line.
Figure 5

Move to the larger line. Then use a flathead screwdriver to lever out the plastic clip (red arrow). Remove the clip from the line (inset). Then pull the line straight off to remove it.

Remove the small line from the mounts (red arrows) at the side of the canister.
Figure 6

Remove the small line from the mounts (red arrows) at the side of the canister.

Next, remove the hose clamp (red arrow).
Figure 7

Next, remove the hose clamp (red arrow). Then remove the vent hose from the canister.

Working next to the fuel filter, remove the 13mm nut (red arrow).
Figure 8

Working next to the fuel filter, remove the 13mm nut (red arrow). Spray some penetrating oil on the threads if it is rusty like my subject vehicle.

Now you can loosen the canister mounting bolts.
Figure 9

Now you can loosen the canister mounting bolts. These bolts (red arrows) also secure the exhaust hanger. Loosen them about six to eight turns. Do not remove them.

Lever the canister mount out of the fuel filter stud (red arrow).
Figure 10

Lever the canister mount out of the fuel filter stud (red arrow).

Lower the canister enough to access the vent solenoid.
Figure 11

Lower the canister enough to access the vent solenoid. Then remove it from the metal mount (red arrow).

Slowly lower and guide the charcoal canister out of the exhaust mount and remove it from the vehicle.
Figure 12

Slowly lower and guide the charcoal canister out of the exhaust mount and remove it from the vehicle. Note the slotted bracket for the canister. This allows removal without removing the hanger fasteners.

Drill out or remove the 4mm Allen bolt (red arrow).
Figure 13

Drill out or remove the 4mm Allen bolt (red arrow). Then transfer the bracket to the new canister. The previous step's method depends on the condition of the fastener. As you can see, mine is too rusty to loosen. It has to be drilled out. Before reassembling the charcoal canister, inspect the canister lines and hoses for cracks or damage. You don't want to reinstall a defective part. Your check engine light will be on soon after if you do.

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Page last updated: Fri 12/2/2016 02:50:04 AM