turbo housing and problem found

[paccool]

Well, I got the new 16 housing put in today. During the change, I found a problem with the turbo bearings. There was not any play in the shaft nor were the bearings rough, just seemed to be tight. I had another center shaft and wheel unit and found that it turned much easier than the one in the truck so I decided to change the whole thing. Good thing, cause I never did get the old housing broke loose. Had the wife hold the turbo while I beat on it for about an hour. This was after soaking with penetrating oil all night. Glad I have a good wife who helps me out sometimes. (not always but most of the time)



After swapping the air side housing onto the newer shaft unit and putting the new 16 housing on, got the unit put back into the truck. Took it for a ride and --WOW . What a difference. Only picked up 1-2 pounds boost but it sure gets there fast! My 0-60 time before was about 13 seconds, now is about 10 seconds. Really accelerates hard. I feel the old turbo was taking a long time to get up to speed because it was tight. The old one stopped as soon as I spun it by hand where the one I put in would spin for 3 or 4 revolutions.



You guys might want to spin the impeller the next time you have the inlet hose off. You may find a problem like I did.

 

[KEENO]

Thanks for the tip Stan!



I like to give mine a 'Ta-whir-al" when I change the oil...



KEENO

 

[paccool]

OK- just got back from a trip and the mileage per gallon has increased 1-2 MPG than from what it was before I changed the housing. Question for you that have changed the housing - did you see an improvement in mileage or was the problem I found causing this?



I'm guessing that it may be a combination of both. More air sooner from the turbo should help and the shaft problem mean't the turbo didn't want to turn as easy and may have acted like a blockage to the air.



At 70MPH, there is a little boost showing on the gauge now where before there was none unless I accelerated some. Sure doesn't take much pedal now to kick up to 10 pounds or so.

 

[GOODE11]

paccool,



When we switched out trucks to the 16 mileage gains averaged 3-4mpg this is w/ open exhaust systems. When I switched my truck to the 14 from the 16 I lost some mpg.



We pull very heavy loads so the 16 is awesome for towing and mpg. I have some pics of mine loaded but haven't figured out the posting system yet.



Just FYI

 

[paccool]

Good11



Thats good to hear! I think you had the 21 housing on your truck so the mileage gains are about right for mine that had the 18. 5 housing. This MPG improvement is something I had not heard of before. All the more reason to change out. Haven't towed with it yet but expect it to be even better than before.