2006 Facelift TD4 Auto turbo vacuum boost solenoid

PeterH67 said:

Morning all,
I have the facelift Mk1 2006 TD4 auto and have had the common issues with the vacuum hoses replaced but now have the engine light, discussions have led to an issue with the turbo solenoid needing to be replaced. Speaking with the LR centre they want to sell the turbo and solenoid as one, anyone have a part number for just the boost solenoid or am I going to have to look round scrap yards for a replacement?

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PeterH67 said:

Morning all,
I have the facelift Mk1 2006 TD4 auto and have had the common issues with the vacuum hoses replaced but now have the engine light, discussions have led to an issue with the turbo solenoid needing to be replaced. Speaking with the LR centre they want to sell the turbo and solenoid as one, anyone have a part number for just the boost solenoid or am I going to have to look round scrap yards for a replacement?

Click to expand...

Nodge68 said:

The turbo vane control is taken care of by 2 components.
The have a control solenoid, which is basically an electrically actuated vacuum switch. This is designed to pass vacuum to the vacuum actuator mounted on the side of the turbo, when needed, or open the vacuum actuator back to the atmosphere when not being actuated.

There are 3 ports on the solenoid control valve, all 3 ports must be connected to the correct hoses, or the system can't work correctly.

The vacuum actuator needs to be tested, but this is a simple test to make sure it will hold a vacuum. Simple sucking on the vacuum hose to it is sufficient to determine if it's faulty or not.

The solenoid valve testing is more involved, but they are replaceable for not much money, so it's sometimes just easier to replace it.

Also there is a filter in the system, which should be replaced annually. This is an important part of the system, so must be fitted and replaced.

Also read the codes from the vehicle, as those could point to the component giving the issue.

Click to expand...

Nodge68 said:

The turbo vane control is taken care of by 2 components.
The have a control solenoid, which is basically an electrically actuated vacuum switch. This is designed to pass vacuum to the vacuum actuator mounted on the side of the turbo, when needed, or open the vacuum actuator back to the atmosphere when not being actuated.

There are 3 ports on the solenoid control valve, all 3 ports must be connected to the correct hoses, or the system can't work correctly.

The vacuum actuator needs to be tested, but this is a simple test to make sure it will hold a vacuum. Simple sucking on the vacuum hose to it is sufficient to determine if it's faulty or not.

The solenoid valve testing is more involved, but they are replaceable for not much money, so it's sometimes just easier to replace it.

Also there is a filter in the system, which should be replaced annually. This is an important part of the system, so must be fitted and replaced.

Also read the codes from the vehicle, as those could point to the component giving the issue.

Click to expand...

andyfreelandy said:

If you actually mean the solenoid that connects to the turbo actuator by a rubber hose then that can be obtained separately. The actuator may well be complete with turbo.

I might be able to find you one if you clarify.

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PeterH67 said:

Hi Andy, I got through the solenoid piece through a garage, and engine light has gone.
Now I just need to see where this goes… found it loose near the solenoid!

Click to expand...

Nodge68 said:

Also there is a filter in the system, which should be replaced annually. This is an important part of the system, so must be fitted and replaced.

Click to expand...