Motor going back to stock
Thread Starter
TECH Enthusiast
Joined: Mar 2002
Posts: 546
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From: Lancaster,PA
Motor going back to stock Well its been a long process but the car is almost ready to sell. On start up the car puffs a cloud of smoke and it smells like coolant. It stops right away though. When I start driving it there is no smoke at all.
I am wondering if the intake being port matched to the other heads might be the problem.I am not really sure to what degree they were ported also. Could that be the problem? Any help would be appreciated
I am wondering if the intake being port matched to the other heads might be the problem.I am not really sure to what degree they were ported also. Could that be the problem? Any help would be appreciated
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Joined: Dec 2001
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From: Bergen County, NJ
White smoke with an antifreeze smell doesn't sound like an intake match issue.
How many miles have you driven since you put it back together. Antifreeze will sometimes get into the exhaust when you do heads, have you burned off anyhing in the exhaust?
Smoke on start up is normally a sign of either valve guides or sealing around the rocker studs but also usually smokes on deceleration.
Finally, did you put the stock tune back?
How many miles have you driven since you put it back together. Antifreeze will sometimes get into the exhaust when you do heads, have you burned off anyhing in the exhaust?
Smoke on start up is normally a sign of either valve guides or sealing around the rocker studs but also usually smokes on deceleration.
Finally, did you put the stock tune back?
Thread Starter
TECH Enthusiast
Joined: Mar 2002
Posts: 546
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From: Lancaster,PA
The stock tune is back in. The air pump is not connected but the exhaust manifolds are blocked off. I have probably driven the car about 25 miles since the car was put back to stock a year ago
You are not going to run into any coolant problems whatsoever by port matching the intake manifold. The LS1 uses a dry intake, meaning that it has no coolant passages in it, so altering it will not make coolant leak. Also, if the heads were ported too much, and hit a water jacket, it should have been seen instantly, so I doubt that is your problem.
Also, if you are burning coolant, your oxygen sensors will alert you, lol. You can foul them out pretty quick by burning coolant.
If you still believe it's coolant, I would be willing to bet you may have a cracked head, warped head or improperly seated head.
Let the car sit overnight, and then go pull the spark plugs in the morning. Take a flathead screwdriver, and wrap the tip with a white paper towel by taping it onto the screwdriver. Then, stick the screw driver into the spark plug bosses and slowly crank the engine over by hand at the crank pulley. When the piston comes up you'll be able to touch it with the screw driver. Once you touch it, pull the screw driver out, and examine the tip. Do this for all 8 cylinders. If the paper towel is soaked with coolant, you have a cylinder head problem. This method will allow you diagnose which head is bad, and what cylinder has been burning coolant. Plus, you can do this without tearing your engine down.
Matt
Also, if you are burning coolant, your oxygen sensors will alert you, lol. You can foul them out pretty quick by burning coolant.
If you still believe it's coolant, I would be willing to bet you may have a cracked head, warped head or improperly seated head.
Let the car sit overnight, and then go pull the spark plugs in the morning. Take a flathead screwdriver, and wrap the tip with a white paper towel by taping it onto the screwdriver. Then, stick the screw driver into the spark plug bosses and slowly crank the engine over by hand at the crank pulley. When the piston comes up you'll be able to touch it with the screw driver. Once you touch it, pull the screw driver out, and examine the tip. Do this for all 8 cylinders. If the paper towel is soaked with coolant, you have a cylinder head problem. This method will allow you diagnose which head is bad, and what cylinder has been burning coolant. Plus, you can do this without tearing your engine down.
Matt
Thread Starter
TECH Enthusiast
Joined: Mar 2002
Posts: 546
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From: Lancaster,PA
I have a set of stock cores on the car right now. I should have had them checked out by I relied on the person who I got them from. Its turning out to be a bad mistake.
I will try the method you told me dragon.
I will try the method you told me dragon.
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Thread Starter
TECH Enthusiast
Joined: Mar 2002
Posts: 546
Likes: 0
From: Lancaster,PA
I have a set of stock cores on the car right now. I should have had them checked out by I relied on the person who I got them from. Its turning out to be a bad mistake.
I will try the method you told me dragon.
I will try the method you told me dragon.
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