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Old 11-14-2012, 10:38 AM   #1
Scooby Newbie
Member#: 293833
Join Date: Sep 2011
Chapter/Region: MWSOC
Location: Schofield, WI
2002 WRX

Default White smoke

At a stop light I noticed white smoke coming out from under the hood. I pulled over and noticed that it was coming from the radiator. I just had that replaced a few years ago & never noticed any smoke from there before. Just recently had a new tranny put in and now I notice the smoke. My temp gauge is at normal. What else could it be?
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Old 11-14-2012, 10:44 AM   #2
IA Performance
Former Vendor
Member#: 25194
Join Date: Sep 2002
Chapter/Region: RMIC
Location: Boulder, CO
2008 Forester XT 5mt
Dark Gray


If the clutch was just done (20 miles or less) there is a chance penetration spray is burning off. If it has been longer than ~20 miles then there may be a leak somewhere, none related to the clutch job. Assuming the car has over 20 miles then I would be proactive with sorting it out, before it has a chance to possibly damage the motor.

Radiator Pressure Testing equipment should be able to find a coolant leak

White smoke could also be an oil leak, often common after an oil change since oil can get on the exhaust manifold heat shields.

Let us know what you end up finding.

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Old 11-14-2012, 10:45 AM   #3
Scooby Newbie
Member#: 329543
Join Date: Aug 2012
Chapter/Region: South East
Location: NC
2003 WRX Wagon
Sonic Yellow


Could be excess coolant burning off? Does it smell sweet?
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Old 11-14-2012, 12:32 PM   #4
Scooby Newbie
Member#: 307828
Join Date: Jan 2012

Check power steering pump for leaks.
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Old 11-14-2012, 01:18 PM   #5
Scooby Specialist
Member#: 279525
Join Date: Apr 2011
Location: QUEENS NY
04 rex luger!


Yea might also have a tiny pinhole sized leak coming from top coolant hose. You might not notice while its idleing but when under pressure the coolant might drip off that tiny hole and fall directly on the exhaust mani causing smoke. It happened to me, so just replaced with a sam o hose. Does it smell sweet?
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Old 11-14-2012, 01:38 PM   #6
Scooby Newbie
Member#: 329311
Join Date: Aug 2012
Chapter/Region: Tri-State
Location: PITT/Collegeville, PA
2003 WRX
Satin Black


Check coolant and power steering levels. Check for holes in the upper radiator hose also.
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