Tahoe97
Member
- Joined
- Aug 27, 2013
- Posts
- 50
- Reaction score
- 32
We just completed a round trip drive between NC and FL running 10 straight hours in both directions at 75mph+ in our 2005 Tahoe (5.3L) . We have 270,000+ miles on the engine and it still runs great but historically uses more oil than normal. No oil leaks anywhere. Before the 1st 700 mile drive, I topped off the oil but had to add 1 qt upon arrival. Same deal on the return. Used 1 qt in 700 miles.
After the trip we started seeing blue smoke coming from the exhaust upon the 1st start of the day. We had not previously seen this after any long trips so this is a new development. After the 1st start of the day, any subsequent starts during the day do not produce the smoke. It has also not been as bad as the picture below which was the 1st start on the day after the 700 mile return drive. It has become less severe with each day but still remains to some degree.
I am seeing some online discussions that suggest the drivers side valve cover with the built in PCV valve is problematic on long extended drives with the original design allowing oil to get through the PCV valve system and into the combustion chamber. Is this in fact a possible cause?
The dealer suggested we may have a stuck ring and actually recommended putting 1 qt transmission fluid into the oil to clean out any carbon buildup in the cylinders and then after about 400 miles change out the oil again. Does this make sense or is this not wise?
Any and all recommendations are welcome. Thanks!
After the trip we started seeing blue smoke coming from the exhaust upon the 1st start of the day. We had not previously seen this after any long trips so this is a new development. After the 1st start of the day, any subsequent starts during the day do not produce the smoke. It has also not been as bad as the picture below which was the 1st start on the day after the 700 mile return drive. It has become less severe with each day but still remains to some degree.
I am seeing some online discussions that suggest the drivers side valve cover with the built in PCV valve is problematic on long extended drives with the original design allowing oil to get through the PCV valve system and into the combustion chamber. Is this in fact a possible cause?
The dealer suggested we may have a stuck ring and actually recommended putting 1 qt transmission fluid into the oil to clean out any carbon buildup in the cylinders and then after about 400 miles change out the oil again. Does this make sense or is this not wise?
Any and all recommendations are welcome. Thanks!