Trivia Question #9

Frank M

BANNED
Joined
Apr 7, 2000
Location
NH
TDI
NB
The LEAST likely cause of excessive blue smoke in the exhaust of a turbocharged engine is:

1: PCV valve stuck in the open position
2: worn turbocharger seals
3: worn valve guides
4: worn piston rings
 

FowVay

Veteran Member
Joined
Aug 27, 2000
Location
Georgia
TDI
2009 Jetta returned to der Führer
I would choose numero UNO. A open PCV should not cause oil to be in the combustion chamber other than what is being vaporized through normal operational conditions.
 

George

Well-known member
Joined
Mar 4, 1999
Location
Virginia Beach, VA, USA
TDI
2012 Audi A3 Silver, 2010 Jetta Sportwagen, White
Heck, what do I know? I'll opt for #2. Seems to me all the others could result in more oil burning, hence the smoke.
 

Lug_Nut

TDIClub Enthusiast, Pre-Forum Veteran Member
Joined
Jun 20, 1998
Location
Sterling, Massachusetts. USA
TDI
idi: 1988 Bolens DGT1700H, the other oil burner: 1967 Saab Sonett II two stroke
#1. The PCV valve is open part of the time when it functions normally. Any time there is positive crankcase pressure, this valve is venting. If the normal operation of this valve does not cause excessive smoke, why would extra-normal operation?
That's my rationalization, and I'm sticking to it.
 

Frank M

BANNED
Joined
Apr 7, 2000
Location
NH
TDI
NB
The correct answer is #1
an open PCV will not cause the engine to ingest oil, or enough to make any smoke.
 
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