MikFish
Member
- Messages
- 35
- Reaction score
- 54
1996 GMC 6.5 3500 2WD. 235,000 miles.
Love my truck. At about 214,000 replaced the water pump with the high output and a Duramax fan after blowing a heater hose. Truck ran for about 5-6 minutes before I could get off highway and temp gauge spiked to the max. Replace heater hose refilled system, truck ran fine. noticed the water pump dripping in my drive way as soon as I got home, hence the new pump and fan.
Fast forward to now, additional 20,000 trouble free miles, but now I am seeing small amount of exhaust smoke as well as blow by out of the oil filler cap.
Reading through some of the similar issue threads, could it be the CDR valve be going/gone bad? There is no 'foamy' oil, I don't feel like it is a head gasket. Still has good get up and go, not sluggish at all, no over heating issues, in fact it runs about 15-20 degrees cooler after the new water pump.
There is also a small amount of oil 'film' inside the front of the turbo. I pulled that assembly to clean and replace the air cleaner.
Thanks.
Love my truck. At about 214,000 replaced the water pump with the high output and a Duramax fan after blowing a heater hose. Truck ran for about 5-6 minutes before I could get off highway and temp gauge spiked to the max. Replace heater hose refilled system, truck ran fine. noticed the water pump dripping in my drive way as soon as I got home, hence the new pump and fan.
Fast forward to now, additional 20,000 trouble free miles, but now I am seeing small amount of exhaust smoke as well as blow by out of the oil filler cap.
Reading through some of the similar issue threads, could it be the CDR valve be going/gone bad? There is no 'foamy' oil, I don't feel like it is a head gasket. Still has good get up and go, not sluggish at all, no over heating issues, in fact it runs about 15-20 degrees cooler after the new water pump.
There is also a small amount of oil 'film' inside the front of the turbo. I pulled that assembly to clean and replace the air cleaner.
Thanks.