Diagnosing Turbo on Gen 1 Paj

[Pampas86]

So I recently changed the fuel filter out on the truck (4D56 Diesel Engine), which involved having to remove the turbo/intercooler assembly. Got everything back in place and got to wondering if the turbo was even working. I've never had a car or truck with a turbo, so no idea what its supposed to sound like, when it should kick in, etc. So I hooked everything back up and marked the turbo propeller blade oriented towards the radiator. I've driven it probably 30-40 miles since, at varying speeds up to 70-75mph, looked under the turbo unit tonight and the marked fan blade looks to be in the same position. So a couple to three questions I have:

1) Is it possible that the fan blade generally stops in the same place? Or would everyone's guess be that the turbo/intercooler unit is indeed not working? If so, is there a common problem area or best place to start investigating?
2) Is there a way to test the turbo unit to know if it is functioning or not?
3) A better understanding of the exact function of a turbo would probably help, but as a basic question, is there any danger in running the truck with a non-working turbo unit?

 

[evol911]

The turbo on your truck is on the driver's side(imported pajero) under the intake manifold. I believe what you are referring to is the small cooling fan mounted on the top mount intercooler. Which only activates in high temp situations.


This link shows where the turbo is on a non intercooler panel:
http://s281.photobucket.com/user/bumpstopbrawler26/media/2011-06-18154608.jpg.html


You shouldn't be able to see any blades of the turbo unless you remove intake piping from it.

If you remove the pipe that goes from the turbo to the intercooler, and increase the rpm of the truck, you should be able to feel a large volume of air. I would also suggest a boost gauge and an EGR gauge. But I rarely hear a bout seized turbos, usually they wear bearings and become too loose which leads to oil consumption. New turbos can be had on eBay for $250 or so (Chinese copies) and are fairly decent. Don't expect high mileage from them but they do work just fine.

I really suggest reading up on the 4d56t, and turbos.

https://m.youtube.com/watch?v=DqWKNuTppmU

I've been trying to ingest all I can about these engines so I would be happy to help as much as I can.


Let me just get this out of the way before jeep-n-montero gets here....

Did you google it?

 

[Clem]

Let me just get this out of the way before jeep-n-montero gets here....

Did you google it?

I'm still cleaning the coffee off my screen. Thanks for the morning laugh.:coffeedrink:

Clem

 

[jeep-N-montero]

If you did indeed mark the compressor(intake side) wheel of the turbo and it remained in the same position(seized) then this would be very pronounced when trying to accelerate, as this would essentially become an exhaust restriction due to the exhaust side of the turbo not being able to turn and exhaust the gases, you would also typically see an increase of black smoke due to the unburned diesel fuel. If you can post a picture it would help immensely to help point out the issue.