[vanmantraveler]

Ok so at what point does a turbo get too old and start going out? I was pushing mine today....6% plus grade pulling 10K plus... about 3 or 4 miles. Temp in Pre-turbo hit 1300 and I backed out kept it around 1100-1200... now when I hit boost I think I get a high pitched whine... I need to make sure that it is not a Fan belt/ tranny/ power steering pump noise I will take it on a short road trip in the morning to see if it is boost or RPM noise. Still the turbo will pull 23 PSI it just sounds funny... I wonder if it is going out on me at 132xxx. I was running it in Safe tow mode but it was working it a bit to keep it up to 55 MPH. Looks like I need to take off the air filter and inlet tube and see what the end play looks like in the next day or so if the road test shows it to be a boost noise. any thing i should look for other then oil leaks and chipped Impellers?

 

[NCHornet]

Check for any boost leaks while your in there.

 

[Coolhand]

I lost mine on the 02 in sig at 85K - may have been a defective unit from factory, the truck ran much better after same. Truck was stock, with FORD AIS intake and 4" Turbo back exhaust only.

Truck now has 95K, runs great.

However I know a number of folks with 7.3's and I believe I am the only one to replace the turbo, some of these guys have 240K+ miles. So not sure how to answer.

Good luck

CH /ubbthreads/images/graemlins/cool.gif

 

[thetonka]

I replaced mine at over 200K and when I pulled it there was play in the shaft but probably not enough to require a change. The vanes were a bit dusted though. For me it was the elimination of surge that was the biggest problem with my stocker, seemed to get worse with age.

 

[Pocket]

[ QUOTE ]
Temp in Pre-turbo hit 1300 and I backed out kept it around 1100-1200

[/ QUOTE ]
The purpose of monitoring pyro temps is not to keep the turbo safe, it's because you can cause engine damage. The pistons are aluminum, and sustaining temperatures over 1250 for an extended period of time will kill the motor. The turbo on the other hand can handle higher temps without problems. The only key time to monitor pyro temps for turbo longevity is when you are shutting off the motor. If the temps are too high, you can cause oil coking over the long run.

If you are worried about the turbo, remove the intake tube and wiggle the compressor wheel shaft to see if there is any play. If there is none, your turbo is fine.