Ok, in case people missed my post on me buying a used turbo. I bought a used GT2556r, it's the turbo that comes in the Mountune MRX kit, the previous owner said it had about 45k miles of use. When I got it the blades did not spin freely, but other than that no signs of damage. Took it to Turbo Depot a local rebuilder. The only thing wrong was the ball bearings were coked. This is a conditions where the bearings are coated in burnt oil and can not spin properly. What causes coking is shutting the car off before the turbo has a chance to cool off after running it hard. The rest of the turbo in fine, just needed the the bearing cartridge replaced.
Now the coking problem. Back in the day, before the internet, when car mods were reported in Hot Rod this problem was taken care of with the used of a turbo timer. Now a days turbo timers seem to have fallen into disfavor, due to better oil and water cooled turbos, but at least in my case or the former owners case, coking still seems to be a thing. Now my plan is to not shut the car down till it has cooled off, but in the back of my mind the old school me is thinking maybe a turbo timer is not such a bad thing. what do you all think?
Now the coking problem. Back in the day, before the internet, when car mods were reported in Hot Rod this problem was taken care of with the used of a turbo timer. Now a days turbo timers seem to have fallen into disfavor, due to better oil and water cooled turbos, but at least in my case or the former owners case, coking still seems to be a thing. Now my plan is to not shut the car down till it has cooled off, but in the back of my mind the old school me is thinking maybe a turbo timer is not such a bad thing. what do you all think?
