CT_WANDERER wrote:
Where is the coolant coming from? Should not have any coolant leaking into the turbo.
The turbo is cooled with coolant in two places. Between the hot and cold side and in the VGT mechanism, electric motor side.
The VGT has an in and out coolant line to cool the VGT electrical portion, but the coolant is not suppose to bypass in the motor area, there is a seal that is suppose to protect it, poor design and Cummins has made not effort to fix it. This turbo was remanufactured by cummins in 2008 and sure they knew the problem. They could have easily prevented this to happen by improving the seal. Since this problem probably occur only after a few years, the warranty is out and you are stock with a non serviceable motor and have to send another $3500.00 to Cummins for a new assembly. If I have to buy another one, I will modify it with some high temp sealant.
