Can I Test the Turbo At Home?

[zakmuh]

Hi,

I've got a 2003 Sorento 4x4 2.5 CRDi. I just want to know if I could check the turbo wastegate actuator is working by revving the engine high, parked on the drive way.

Would this make the wastegate lever move or do I have to drive the car on the road to test this?

I'm just cleaning up the engine, so as I'm at it, I want to check it. Any help on this is highly appreciated.

Cheers

Edited by zakmuh on Thursday 7th September 15:32

[zakmuh]

Hi,

I've got a 2003 Sorento 4x4 2.5 CRDi. I just want to know if I could check the turbo wastegate actuator is working by revving the engine high, parked on the drive way.

Would this make the wastegate lever move or do I have to drive the car on the road to test this?

I'm just cleaning up the engine, so as I'm at it, I want to check it. Any help on this is highly appreciated.

Cheers

Edited by zakmuh on Thursday 7th September 15:39

[TooMany2cvs]

zakmuh said:

I've got a 2003 Sorento 4x4 2.5 CRDi. I just want to know if I could check the turbo wastegate actuator is working by revving the engine high, parked on the drive way.

Would this make the wastegate lever move or do I have to drive the car on the road to test this?

Without load on the engine, you won't get enough boost to wake the wastegate up.

Are you thinking it's seized for any particular reason, or just because it might be fun to fiddle with?

[zakmuh]

Thanks for your reply. I think it's seized.

When you rev high, it builds pressure from the exhaust and that would be enough for the actuator to kick in, I thought?

[TooMany2cvs]

zakmuh said:

Thanks for your reply. I think it's seized.

When you rev high, it builds pressure from the exhaust and that would be enough for the actuator to kick in, I thought?

No.

[zakmuh]

Okay.

I have to check with a pressure meter then.

Cheers

[GreenV8S]

zakmuh said:

Okay.

I have to check with a pressure meter then.

Cheers

How do you propose to do that?

I would have thought it would be easy enough to check whether it is seized by moving it with your hand.

[McVities]

Interesting..............

You want to test a part, kudos for having a go.
Do you know where the actuator is?

This thread would suggest not.................


Other post


The part with the hose missing is indeed your actuator.


Get a length of vacuum hose and attach one end to the actuator and the other end to a bicycle tyre pump. Pump a few times and the actuator should start to crack open.

Then find a vac hose diagram and see if any are missing from your engine bay.

[eliot]

McVities said:

Interesting..............

You want to test a part, kudos for having a go.
Do you know where the actuator is?

This thread would suggest not.................


Other post


The part with the hose missing is indeed your actuator.


Get a length of vacuum hose and attach one end to the actuator and the other end to a bicycle tyre pump. Pump a few times and the actuator should start to crack open.

Then find a vac hose diagram and see if any are missing from your engine bay.

It is an actuator - not sure its the wastegate one though. That looks like an inlet manifold rather than a turbo to me.

[zakmuh]

McVities said:

Interesting..............

You want to test a part, kudos for having a go.
Do you know where the actuator is?



The part with the hose missing is indeed your actuator.

Thanks but the wastegate actuator is on the turbo unit, right next to the exhaust manifold and it has a vacuum hose connected to it - the one on top of the inlet manifold, shown in my other thread pic is NOT the actuator.

Like he said, I can test the actuator with cycle pump. when pressure is pumped (not pumping), the lever should stay for 30 seconds or so

[stevieturbo]

That makes the assumption it's a pressure based unit rather than vacuum.

But do you even state what the alleged problem is with the vehicle ?

This isnt the first series of strange posts about this vehicle ?

[zakmuh]

There's a hose connected to the wastegate (which I've called it 'vacuum hose') but I don't know whether the actuator is activated my pressure or vacuum.

I'm not a mechanic, just a DIYer and that's why I'm here seeking advice on this issue

[GreenV8S]

zakmuh said:

I'm not a mechanic, just a DIYer and that's why I'm here seeking advice on this issue

My advice: don't fiddle with it unless you gave a good reason. Pulling hoses on and off and applying vacuum or pressure can introduce new problems on top of whatever it is you are trying to solve here - which you still haven't mentioned yet. Since you don't seem to know what the devices are for that you want to test, or understand how to test them, it is unlikely that your tests will yield any useful information.

[zakmuh]

Noted, I'll let it be as it is

The EGR valve and the intake manifold is all clogged up, I suspect the wastegate must also have got carbon built up. So I wanted to check if that lever rod is moving or stuck.



Cheers

[e635815]

Diesel engines have a vacuum pump. The wastegate will then be operated by a vacuum actuator. The bycicle pump will apply pressure and will therefore not crack it open.
Reving the engine would normally open the wastegate.
Otherwise you can just push the lever (spring loaded closed) to see if it operates.
Cheers
Philippe

[e635815]

Diesel engines have a vacuum pump. The wastegate will then be operated by a vacuum actuator. The bycicle pump will apply pressure and will therefore not crack it open.
Reving the engine would normally open the wastegate.
Otherwise you can just push the lever (spring loaded closed) to see if it operates.
Cheers
Philippe