White smoke out my exaust - Team Camaro Tech
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post #1 of 8 (permalink) Old Aug 5th, 00, 02:21 PM Thread Starter
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I have a 69 Camaro with a Chevy 350 small block. The block is a mild build up with the stock heads. I have owned this car for 6 months. I had a problem with the engin getting to hot (I thought). It was running at about 205 deg. After I shut the engin off, I would come back to my car (at least 1/2 hour later) and see antifreeze on the ground. I thought it was a cooling problem and put a hi flow thermosat in it (160 deg) and the correct radiator shroud. This worked for a couple of weeks. I also had oil leaking (just the residue) out of my #7 cylinder. My Header at this spot was loose so I tighted the bolts and no more leaking (I perviously had a light white smoke coming out of this spot). Last week, I smelled something burning and could see white smoke coming out of my exaust pipe. It is the same pipe as where I had the leak before (#7 Cylinder). I am burning oil (about 1 quart in 350 miles) and connot keep the radiator more then 1/2 full with out it spilling out when the motor is stopped (it will also overflow when the car is running with the level at approximatly 1.5" below the top of the radiator, below this level it only overflows when the engin is off). The smoke out my exaust pipe is white, and is much more noticable at slow speeds (idle). I also get a white puff of smoke when at idel I hit the gas. I pulled the #7 plug and it had light tan depsits all over the plug (electrode and metel arm). The Electrode was in good shape with no gapping or damage. It did have on one side what looked like smothing had been dripping on it ( heavyer depost on the one side, I do not know wich side with requards to the engin). My oil is nice and brown (no milky residue) and my anitfreeze is very green ( no brown stuff in it). I know I am not getting any water in my oil or vic a versa.

I am thinking it is ether the head gasket, head, or a piston ring. I have replaced a head before, but am by no means an expert. Is there something I can check before I tear the top end of my motor apart to see just what exactly is wrong? The overflow of the radiator and the oil useage are leading me to belive it is a head gasket. Any help would be greatly appreshated
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post #2 of 8 (permalink) Old Aug 5th, 00, 04:32 PM
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white smoke, sounds like a headgasket. you can have the cooling system pressure tested to see if it holds pressure, if you have no external leaks, but the system loses pressure, probably a headgasket.

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post #3 of 8 (permalink) Old Aug 6th, 00, 01:52 AM
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Lets hope that it is a head gasket,since you owned the car only 6months,if its a cracked block or head,major $$$.has this been since you owned the car or just recently ?
and as for checking;with the car cool,remove the rad.cap,fill rad.,run the motor with out rad.cap,keeping it filled, look to see if your getting bubbles in rad.
p.s. reread your post... and yes sounds like a head gasket only.

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[This message has been edited by DOUG G (edited 08-06-2000).]
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post #4 of 8 (permalink) Old Aug 6th, 00, 01:53 PM Thread Starter
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I check my radiator with then engin running when cool, and no bubble. I thought White smoke was oil, Blueish gray was antifreeze.

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post #5 of 8 (permalink) Old Aug 6th, 00, 02:07 PM
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White = water or coolant.
Blue = oil
Black = fuel

David

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post #6 of 8 (permalink) Old Aug 7th, 00, 06:26 AM
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White = water or coolant.
Blue = oil
Black = fuel
Lots of Sparks = too much nos, not enough fuel
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post #7 of 8 (permalink) Old Aug 7th, 00, 10:11 AM
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let it run till warm and check, this is with out rad.cap ! i can not express this enough, DO NOT TAKE CAP OFF WHEN HOT .

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post #8 of 8 (permalink) Old Aug 7th, 00, 12:39 PM Thread Starter
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I opened my radiator cap hot once when I was first learning how to drive. I had old fathful gussing out of my radiator.

thanks for you help on the smoke colors. Just for curousity, just how much exaust gas do you need for a spark plug in your exaust tail pipe to light this gas up? I have seen a few set up like this at the cruse ins, but there motors were way out of tune.
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