CT26 62-1 and No Boost

[1200det]

Ive had a rebuilt 62-1 on my vehicle for about 50miles now and im getting 0 psi Boost ??

Engine runs and starts and idles fine so there is no piping off or major leaks its just not getting any boost at all

Ive pulled the turbo off and from what i can see the Compressor and Exhaust blades look fine with none broken and the Turbo spins freely ?

Could it be the part of the bladed broken that you cant see ?
Bearing Seized when it boosts up but fine when spinning by hand ?
Wastegate isnt stuck shut?
Ive Removed BOV altogether ?

Or

Could it actually be something else rather then the Turbo , I didnt think the engine could go into a Limp mode enough not to create boost ?

 

[Allan_MA70]

you can hear the turbo spooling up? is the wastegate stuck open?

 

[1200det]

Well i dropped the exhaust and Elbow to see if the exhaust blades were still intact and they were and i started the car and idled it and turbo spun freely and the wastegate was closed

Is the wastegate something that could have been jamming open when boosting and closing off throttle , also if it was stuck open is it enough to bypass all boost that the guage wont go into + boost

 

[1200det]

Here are the pics of the exhaust and compressor wheels , Can they be broken where you cant see the Blade inside the housing ?

 

[IJ.]

Still wouldn't cause what you describe.

It would be horribly out of balance and scream it's brains out when it tried to spool.

I'm with Allan check the Gate.

 

[1200det]

Well the wastegate was shimmed also , so i guess that adds to it

Also i could hear the turbo spooling at all , which i guess if the wastegate is fully open the turbo would hardly move from idling revs ? Correct ?

 

[koulee]

Maybe the sensor that detects the amount of boost is malfunctioning?

 

[IJ.]

Is this driving the car or free revving in neutral?

 

[1200det]

I had to drive the car home about 60kms slowly , but i could hardly hear the boost building up or the induction through the Air Pod as i would normally , but then again i eased home without booting it to often

 

[IJ.]

Has it boosted ever?

 

[1200det]

I went out for a run today and boosting fine to 10psi for a few hours and a big long full boost run up a steep climb and i hear a noise for a second or two and nothing no power and no boost.

So babied the car home the 50 or so Kms

 

[1200det]

Almost a chatter noise for a second or two and i thought instantly the turbo must have seized, but as i said it spins freely

 

[IJ.]

If you grab the comp wheel can it move enough to touch the Housing?

 

[1200det]

I can see some slight scratching where the compressor blades have at some stage lightly rubbed.

Also when spinning this turbo looking from the compressor side it certainly doesn`t look to spin evenly compared to the stock CT26 i removed.

 

[IJ.]

It sounds like it's surged badly on a shift and maybe straightened out the Comp blades and now there's not enough clearance for it to spin freely under boost

Possibly bent the shaft.....

(worth checking the BoV)

 

[1200det]

I think before i go down the path of fitting the turbo back to the engine and checking the wastegate etc i might send the Turbo off to GCG or the likes during the week to have it checked out.

If all returns ok ill start looking down the path of wastegate etc

 

[IJ.]

Even if the WG was full open you'd manage 1>2 psi of boost at least.

Good move getting it checked at GCG.

Was the BoV working before it died?

 

[1200det]

Aftermarket Greddy valve so its pretty loud and was working perfectly.

have you dealt with GCG at all ?

 

[IJ.]

Yep bought 2 GT Turbo's from em!