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Discussion Starter · #1 ·
2008 trailblazer 4.2 vortec burning oil on start up..


I’ve been noticing a very quick puff of blue smoke out the tailpipe when first started, then goes away immediately.

Anybody know if there’s a common problem with Chevy Trailblazers for burning oil on start up?

Has 70,000 miles- so fairly low, I’ve changed the oil every 3000 miles with full synthetic and k&n filters since I’ve owned it.. I am thinking the valve seals are going.
However I do not know much about these atlas inline 6 engines and don’t want to jump to that conclusion yet.. seems rather soon for valve seals to be worn out.. is there another path for oil to drain into the combustion chamber during startup on these engines?

Cheers thanks for any help out there.
 
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