Smoke

dgoodhue

dgoodhue

BuSTeD 4.3
I finally go around to putting my Syclone back together after overheating the motor this weekend after replacing the sticking thermostat and bent transmission cable/linkage. First I notice my overflow bottle had almost no coolant in it, I know I filled it up when I got the engine running last year. So after idling for about 15 minutes I saw some smoke.

http://s202.photobucket.com/albums/.../Vortec Swap/?action=view&current=SySmoke.mp4

The smoke doesn't smell like anything, so I am incline to think its oil. The missing coolant could be the heater core, mine is over years old, so that is alway a possibility though I don't smell anything. Tonight if I have a chance I am going to test the cooling system.
 
M

MikeRenz

not stock
Re: Smoke

looks like oil smoke (bluish) to me (but this smoke has a pretty distinct smell and you said it has no scent?). Did you simply overfill it (hopefully)
 
murdermachine

murdermachine

Banned
Re: Smoke

Sy#2661 said:
http://s202.photobucket.com/albums/.../Vortec Swap/?action=view&current=SySmoke.mp4

The smoke doesn't smell like anything, so I am incline to think its oil. The missing coolant could be the heater core, mine is over years old, so that is alway a possibility though I don't smell anything. Tonight if I have a chance I am going to test the cooling system.
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Mine does this when I start it after it has sat for a bit AFTER driving... for me it's the valve seals so I don't worry about it too terribly bad but it is on the to do list... does it do this cold starts only or after it's ran for a bit?
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: Smoke

DaveP said:
Begins smoking after a 15 minute idle, eh? Is this a "fresh" engine? Ie recent overbore and pistons? It may not be broken-in yet. If yes, get out and get on it. Make it work hard. Lots of 50-75% TPS runs. Make the rings push hard against the walls and complete the final "machining" process of establishing the ring-wall seal.
Click to expand...

It's a junkyard 2003 Vortec Motor.
 
WyoSyclone

WyoSyclone

Active member
Re: Smoke

It could have had an air pocket and just sucked the coolant out of the overflow when it cooled a bit.
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: Smoke

Treymen said:
Seal, o-ring.

Maybe something as simple as too rich?
Click to expand...

I highly doubt its anything else mechanically.

My AFR at idle are ~14.0:1 according to my wideband and that is about as lean as my truck likes to idle and have everything work (ie AC cycling, electric fans kicking on/off, and Park & Neutral transitions)

The heads were rebuilt. The valve seals and turbo and many of the parts bolted onto the Vortec short block have about 500 miles on them. I will try what DaveP suggested next time I change the plugs, I was going to do a compression check as well.

It's a little disappointing its the motor, since I haven't even done any WOT pulls or tuning yet on it. It's not the end of the world, I was looking at the motor to be a temporary solution. I have a lot money bolted to the short block, but I am only into the short block for about $475-500 plus gaskets and my labor. I will someday build up a beefier Vortec Balance Shaft short block with forged rods and pistons.
 
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