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#1 2016-09-19 18:21:44

dshack
Member
From: Palo Alto, CA
Registered: 2016-03-16
User Number: 36048
Posts: 45

Mysterious smoke from engine bay

I noticed light smoke coming from the engine bay of my 05 Aero 5MT when not moving. The smoke appeared to be coming from the passenger side of the engine, but it wasn't consistent and I couldn't easily ID the source. I did eventually find a small amount of unknown liquid in the circled section of the below photo and am thinking this may be related. Any thoughts on what is going on?
http://s12.postimg.org/v20r1j659/IMG_20160919_134500.jpg

A few comments:
-This was the first time I've driven the car since it sat for 2 weeks while I was out of town
-I changed the oil + filter just before the car sat
-90K miles, Stage 2
-Recently new TB + WP
-All stock gaskets other than exhaust

Thanks in advance!!

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#2 2016-09-19 19:05:34

ikbrown
long live R0LO!
From: Fair Oaks, CA
Registered: 2011-10-06
User Number: 6094
Posts: 4963

Re: Mysterious smoke from engine bay

Leaking from a coolant hose maybe? Did it smell like coolant or could you not tell a smell from the amount it was smoking?


2005 Saab 92x Aero 5MT | The basic mods, Stage 2.04
1968 Dodge Charger 383 | WIP, restored almost everything but body work
2014 Subaru Forester | Wife's car

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#3 2016-09-19 20:59:07

dshack
Member
From: Palo Alto, CA
Registered: 2016-03-16
User Number: 36048
Posts: 45

Re: Mysterious smoke from engine bay

I couldn't tell a smell unfortunately. Will try to go recreate the smoke tomorrow to see if I can get enough to smell it. May also try to swab some of the liquid I saw pooling.

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#4 2016-09-19 23:09:07

mbandi
Mmmmmmm Scooby!
From: Transfer, Pa
Registered: 2011-01-31
User Number: 5179
Posts: 275

Re: Mysterious smoke from engine bay

Power steering pump is probably leaking. Not uncommon.


SOLD: The Wife's 2005 9-2X Aero, 4EAT, Midnight Black Mica
SOLD: 2005 9-2X Aero, Manual, Arctic Silver, 2.1 Stroker
Mine: 2005 9-2X Aero. Desert Silver, 5 speed

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#5 2016-09-20 08:43:54

krazykarguy
Worst ninja editor, ever.
Supporter
From: South Carolina
Registered: 2007-04-06
User Number: 1944
Posts: 8171

Re: Mysterious smoke from engine bay

I can't view images from photo sharing sites at work, so this is a shot in the dark...

...But check the RF inner CV axle boot. They are known to split under the downpipe and fling axle grease on the hot exhaust. When under motion, the smoke exits under the car and is not noticeable. However, when stopped, it tends to pour out from under the right side of the car and out the hood scoop. I just replaced mine about 3 months ago for exactly the issue I describe.

Power steering pump is known to be a leaker on these cars, but not something that smokes typically (at least mine didn't).


2005 Aero 5MT
2014 Ford Mustang GT Premium 6MT - Sterling Gray Metallic

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#6 2016-09-20 21:32:14

elislider
accept no substitutes
Registered: 2014-11-30
User Number: 25881
Posts: 386

Re: Mysterious smoke from engine bay

power steering pump, pretty common that they leak. you can piece together a rebuild kit online probably for cheap.
also replace that hose in front that goes down to the tank, it gets hard and petrified
there is also an o-ring under the little elbow at the top of the tank

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#7 2016-09-21 08:03:40

urabaas
Member
Registered: 2016-09-08
User Number: 37936
Posts: 46

Re: Mysterious smoke from engine bay

My PS pump leaks and it pools up on the valve cover. Haven't noticed it smoking though. Since you also just changed the oil it could be some of the old stuff sitting on the lower of the engine. Or some of the new stuff if you spilled any.

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#8 2016-09-21 12:16:33

elislider
accept no substitutes
Registered: 2014-11-30
User Number: 25881
Posts: 386

Re: Mysterious smoke from engine bay

if it leaks enough or in the right way it will drip down the front or back of the engine and get on the exhaust, hence the smell and the smoke.

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#9 2016-09-23 20:10:49

dshack
Member
From: Palo Alto, CA
Registered: 2016-03-16
User Number: 36048
Posts: 45

Re: Mysterious smoke from engine bay

Haven't had any more smoke, but I am noticing the PS pump is whining and steering is stiff occasionally. I'm thinking the smoke may have been unrelated to the PS issue. I'm going to replace the o-ring at the top of the pump and see if this resolves the issue (https://howtune.com/articles/216-repair … za-wrx-sti). Will report back on results.

Thanks again!

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#10 2016-09-24 07:19:08

WDEagle
Unrepentantly Ideological
Supporter
From: Fernandina Beach, FL
Registered: 2005-05-11
User Number: 7
Posts: 1399

Re: Mysterious smoke from engine bay

PS Pump


Hers --------> 2005 Midnight Black Flat Black Pearl White Saab 92x Aero w/sport 2016 Ultra White Lexus NX200t F Sport
Mine --------> 2004 Black Chevrolet Colorado ZQ8 2016 Lazer Blue Chevy Colorado Crew Cab
Ours --------> 2004 Millennium Yellow Chevrolet Corvette Coupe
Ours 2 --------> 1966 Arcadian Blue Ford Mustang Coupe

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#11 2016-11-08 17:51:19

dshack
Member
From: Palo Alto, CA
Registered: 2016-03-16
User Number: 36048
Posts: 45

Re: Mysterious smoke from engine bay

Here is an overdue update:
-I replaced the top o-ring and still had leaking
-I then pulled the pump and replaced all the seals but still had leaking (probably because I stupidly stripped one of the 4 pump bolts by over tightening)
-I then replaced the pump with a refurb cardone for $80...so far so good!

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#12 2016-11-08 17:54:22

hammyt
0_0
Supporter
From: Chicago, IL
Registered: 2005-07-18
User Number: 562
Posts: 14088

Re: Mysterious smoke from engine bay

Ah the puddle of PS fluid on top of the block; how I don't miss ye.  cool


2005 Saab 9-2x Aero 5MT | 275whp/250wtq | 13.6@100 | SOLD
2014 Focus ST 6MT | Tuxedo Black

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