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Turbo Control Valve Replacement
 
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Pelican Technical Article:

Turbo Control Valve Replacement

Jared Fenton

Time:

1 hour1 hr

Tab:

$65

Talent:

***

Tools:

Small pair of needle-nose pliers, floor jack and two jack stands

Applicable Models:

Volvo C30 T5 (2008-13)
Volvo C30 T5 R-Design (2008-13)

Parts Required:

Turbo control valve

Hot Tip:

Inspect the vacuum lines at the same time you replace the valve

Performance Gain:

Wastegate operates as it should

Complementary Modification:

Replace compressor bypass valve

The turbo control valve is used to control the function of the wastegate. The wastegate is a vacuum operated diaphragm that opens a relief valve inside the turbo when the boost pressure reaches a certain point. This prevents damage to the turbo assembly. Over time, and especially with modified cars, the valve can fail preventing proper wastegate function.

Replacing the valve is relatively easy and should take no more than an hour. The valve itself is accessed through the right side front wheel well. You'll need to jack up the front of the car and remove the front left wheel liner for access. See our articles on Jacking up Your C30 and Removing Front Wheel Liners for more information.

Shown here is the turbo control valve (TCV) on the Volvo C30.
Figure 1

Shown here is the turbo control valve (TCV) on the Volvo C30. Press the locking tab on the electrical connector (green arrow) and pull it off the TCV. Now push the TCV (yellow arrow) up and off the retaining bracket.

Rotate the TCV until you can access the small hose clamps (green arrows) holding each vacuum line to the TCV.
Figure 2

Rotate the TCV until you can access the small hose clamps (green arrows) holding each vacuum line to the TCV. Use a pair of small needle-nose pliers to loosen each clamp and pull the vacuum line off. Now simply transfer the hoses to the new TCV and install it in place of the old one.

Shown here is the turbo assembly removed from the engine.
Figure 3

Shown here is the turbo assembly removed from the engine. I've done this to show the vacuum line connections from the TCV to the turbo. Note the vacuum line connections going form the TCV to the wastegate (yellow arrows) and also to the air intake (green arrows).

Shown here is the final vacuum hose connection going form the TCV to the compressor housing (green arrow).
Figure 4

Shown here is the final vacuum hose connection going form the TCV to the compressor housing (green arrow). Installation is the reverse of removal.


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