Question about 2006 Hyundai Sonata
2006 Hyundai Sonata on cold startup the exhaust puffs blue smoke and the car knocks almost like a lifter noise for about 30 seconds or so. Very loud and doesn't do it all of the time. Mechanic suggested that it is from using purolator oil filter cartridge and the oil is leaking out of the oil filter and is dry on startup...I did not think it was the oil filters job to keep oil at the top end of the motor when not being used
These 3.3l engines are equipped with timing chains. if vehicle has prolonged down time, typically more than 4 hours, vehicle makes a chatter until the timing chain tensioners put tension on the chain. you will need them replaced.
Posted on Feb 09, 2009
This type of smoke on start is caused by worn valve stem seals and loose valve guides, if the noise is lifter noise ( sounds like it may be) replace the cam followers, that should cure the issue, on the other hand a tapping noise is not bad, an actual knock is very bad, and means either the car has piston slap or a defective rod or main bearing.
Posted on Nov 29, 2008
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Posted on Jan 02, 2017
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