Advice needed: 09 Yukon 103.5K miles check up

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farhanm

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I ordered the valve cover and will be replacing over the weekend it if arrives in time.

I am still trying to figure out what may be causing the original problem I had asked the dealer to look at.

puff of smoke coming out on cold start.


IF the PCV vavle had oil spray going into it that caused this smoke problem, then replacing the valve cover will prevent/reduce future oil spray onto the PCV valve.

Do I need to clean/replace the PCV valve also?


again any pointers will help
 

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