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Smoke out of exhaust on start up

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Old 10-01-2005 | 03:43 PM
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Don 79 TA's Avatar
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From: Long Island NY
Car: Hers: 88 Formula 350
Engine: TPI
Transmission: Auto
Axle/Gears: 10 bolt Posi
Smoke out of exhaust on start up

her 88 formula 350 seems to smoke out of the exhuast on start up

it's a white smoke
single 3" flowmaster outlet

not looking antifreeze but oil seems to go down more then i'd think

since it has 85k, is that valve stem seals?

seems the longer it sits, the more it smokes it out

run fine other wise.
no smoke on acceleration or decelleration

just wondering if it is the stem seams, do the heads have to come off?

another thought i was thinking if it is them and i have to take the heads off, is it better to just swap an aftermarket head, like an aluminum type?
Old 10-01-2005 | 04:58 PM
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TPI-Formula350-'s Avatar
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
sounds like valve stem seals...........I have the same thing. I wouldn't worry about it to much if thats it.
Old 10-01-2005 | 07:16 PM
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BOTTLEDZ28's Avatar
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From: Mass
Engine: 350 TPI
Transmission: A4
Axle/Gears: 3.23
definitely valve seals. just a little oil seeping down into the combustion chamber after you shut the car off. It will get worse over time and if you can, I would get it fixed. only you can answer your question on swapping the heads out. well, your wallet will answer that question. oviously, aftermarket heads will be better then your stock heads.
Old 10-01-2005 | 08:28 PM
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dsherw00d's Avatar
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From: Western NY
Car: 68 Camaro, 73 Nova, 67 Mustang
Engine: 350, 355, 289
Transmission: Muncie, 700R4, C4
I took the middle road. I bought rebuilt stock heads and kept my heads in case I want to have them modified. Both sets are the 081 heads. With keeping my heads they cost about $300 completely rebuilt and looking like new. I forget what the core charge was. I used the money I saved over aftermarket heads on headers and some other things. I couldn't afford new heads and headers and heads without headers doesn't make much sense.

-Dan
Old 10-01-2005 | 11:52 PM
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Don 79 TA's Avatar
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From: Long Island NY
Car: Hers: 88 Formula 350
Engine: TPI
Transmission: Auto
Axle/Gears: 10 bolt Posi
yeah, i think they definately need to get done, since it smokes alot

smokes more if it sits longer

figured since it used about a 1qt of oil within a short period of time, might as well do that.

I thought blue smoke was valve stem seals
Old 10-02-2005 | 08:39 AM
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From: Staten Island NY
Originally posted by Don 79 TA
yeah, i think they definately need to get done, since it smokes alot

smokes more if it sits longer

figured since it used about a 1qt of oil within a short period of time, might as well do that.

I thought blue smoke was valve stem seals
If it is bad valve stem seals, the smoke should be blue. If the smoke is white it could be just condensation or the early sign of a bad head gasket. You may need to have a compression test done.
Old 10-04-2005 | 04:40 PM
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From: VA
Car: '91 Z28
Engine: L98 5.7L TPI
Transmission: 700R4
Axle/Gears: 323's
i've heard that letting the valve stem seals go will eventually result in premature failure of the O2 sensor...

KAM
Old 10-04-2005 | 05:03 PM
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Most people cant see the difference between the white and blue. 99.9% chance its the valve stem seals.
Old 10-04-2005 | 06:55 PM
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Originally posted by thunderstick
i've heard that letting the valve stem seals go will eventually result in premature failure of the O2 sensor...

KAM
AND the catalytic converter
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