I thought I would share my experiences and hopefully save a few of you some money. This only applies to diesel Navaras and Pathfinders assembled in Spain between 2005 and 2010.
What is the boost control solenoid designed to do?
It regulates the turbo boost pressure, not the same, but similar to what it does to a wastegate on a petrol engine.
Where is it?
Under the airbox next to the alternator
How do I know if it is failing?
You will get the following symptoms:
How will I know when it has failed?
Fairly obvious when it happens:
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What next?
Two things you can do:
Tip=Make a note of which of the three rubber pipes go where so you can put it back together correctly.
Afterward, you will notice the truck is far more responsive to the throttle and pulls away from junctions more quickly.
![Image]()
Personally, when I cleaned mine, it went back to working perfectly, so I didn't need to part with £90 for a new one. Having already bought it, I decided to fit it anyway.
If you like part numbers, this is the box the new one came in from Milneroffroad.
![Image]()
A later post by one of the members shows how to adjust the turbo actuator
www.nissan-navara.net
What is the boost control solenoid designed to do?
It regulates the turbo boost pressure, not the same, but similar to what it does to a wastegate on a petrol engine.
Where is it?
Under the airbox next to the alternator
How do I know if it is failing?
You will get the following symptoms:
- the truck will feel a bit unresponsive; you will probably ignore this because it is gradual.
- you may occasionally find the truck feels "off the turbo," and you have to change down to get moving
- you might get some smoke when pulling away from junctions (beware, several other things can cause this too)
How will I know when it has failed?
Fairly obvious when it happens:
- a big cloud of smoke when pulling away from junctions
- lack of power, will only get to 60 mph
- if you have a method of measuring boost (ie, Torque app), you will see almost no boost
- at idle, the boost lever can be seen to move up and down fairly slowly if it is working, if not working, it will not move at all - see picture, it is the rusy rod underneath the once gold thing on the turbo.
What next?
Two things you can do:
- buy a new boost solenoid £90 from Milners, double that from a dealer
- clean it. I took it off (see picture) and squirted loads of carb cleaner in the holes the rubber tubes connect to.
Tip=Make a note of which of the three rubber pipes go where so you can put it back together correctly.
Afterward, you will notice the truck is far more responsive to the throttle and pulls away from junctions more quickly.
Personally, when I cleaned mine, it went back to working perfectly, so I didn't need to part with £90 for a new one. Having already bought it, I decided to fit it anyway.
If you like part numbers, this is the box the new one came in from Milneroffroad.
A later post by one of the members shows how to adjust the turbo actuator
turbo boast lever
i have looked and looked, i have been on the garret turbo site. i have looked through the Haines book so many time and i can not reference to or the location of the turbo boost lever to check if my turbo is working as it should . HELP please
www.nissan-navara.net
