Question about 1999 Pontiac Grand Am GT

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1999 pontiac grand am gt

I need correct firing order and here is what has happened to it ran hot 230 F replaced intake gaskets and head gaskets heads are not warped put everything back together it won't start the battery has been disconneted to reset the computer- need help! Checked the engine coolant sensor seems to be ok, battery is on charger I try starting it and battery at full charge drops to 8 volts immediately. I don't think that the battery is cracked.

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  • libedwardsmi Mar 12, 2009

    I just replaced the MAP sensor and Ignition Module, put in new battery and new alternator, and new crank shaft sensors nothing yet.

  • libedwardsmi Mar 12, 2009

    Finally took it to the dealership it was the aluminum plantom on the air intake that was cracked causing it not to turn over thanks for your suggestion though.

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Can you put a socket and ratchet or breaker bar on the damper bolt,, Can you turn the engine over at all?? that is the big bolt on the pulley where the crank is. If you cannot budge the engine, then it is seized up more than likely and the bearings have melted to the crank.

Posted on Mar 12, 2009

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3 Answers

My grand am still overheats even after i changed the termostat and water pump plus, the fan only runs when the temp sensor is unplugged


I had the same problem with my 1999 grand am .I changed water pump, thermostat. I heard the Pontiac engines , 3.4 had overheating problems one is the intake gasket if your losing water but don't know were its going its leaking at the intake gasket and burning off or if you check the oil cap or the dip stick and theres a milky substance on them it would be your head gasket I had to change my head gasket and while I was there I changed the intake gasket too. I haven't had any problems sence I changed them hope this helps. Jack

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How does water get in to the exhaust from intake gasket. I have a 1999 grand an v6. starts blowing white smoke with in 1min after started. no signs of coolant in oil. runs great. I have the intake off only...


If water/coolant is getting into the intake, it is drawn into the cylinders on the intake stoke-if it is not a big leak, you might not see evidence of it in oil for a while, but you eventually will, and the antifreeze will also create problems with crank, rod and cam bearings over time. Installing a new intake gasket should solve your problem, use a straightedge to make sure where the intake mates to the head in the suspected area is flat.

Jul 19, 2011 | 1999 Pontiac Grand Am GT

1 Answer

4.3 v6 head gasket torque schematic


first round is at 22lbs, second 44lbs, third 66lbs. make sure you get the order in which the bolts need to be tightened as not to warp the cylinder head, and that sequence is in the package your new head gasket (s) came in. If you cant find it, your local garage will photocopy it for you.

Aug 01, 2010 | 1999 Pontiac Grand Am GT

1 Answer

I just replaced the intake gaskets on my 2003 pontiac grand am , but when I went to fire it up it was still running like **** come to find out the head gasket on cylinder 3 is blown or the head is cracked....


theres an easier way to fix a blown gasket, its called seal-up you pour it in your radiator and it chemically welds it back together look it up on google most auto shops sell it or something similar, but replaceing the gasket is the best way

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1999 grand am gt 3400 v6


If white smoke is coming out of your tail pipe is is burning antifreeze. However have it checked closely. While it could be a head gasket, the 3400 is noted for the intake gasket leaking. Have a pressure test done before you pay for something that you don't need.

Also there is a way to permanently repair the head gasket if it is a real leak as long as it still runs. Check out Barr's Leak head gasket repair and follow the directions to the letter. do not skip any thing. It works I have repair a dozen cars with this.

Hope this helps

Oct 01, 2009 | 1999 Pontiac Grand Am GT

3 Answers

1999 Pontiac Grand Am with "lower intake leak"...What does this mean specifically? Would this mean the intake for the radiator, gasket, or valve?


Usually intake has to do with the induction system, as in intake manifold , The intake manifold can have several types of leaks, the intake can have a vacuum leak, oil leak, coolant leak or a combination of any of the before mentioned....hope this helps,

Aug 30, 2009 | 1999 Pontiac Grand Am GT

2 Answers

I just changed the thermostat on 3.4 L 1999 Pontiac Gr Am GT THINKING IT WOULD FIX THE OVER HEATING. But there is white steam coming out the exhaust! The oil is not milky so it's not a head gasket. There's...


Are you adding coolant?
Yes ......means it's going somewhere.
Fill the coolant tank to the top...right to the top....leave the cap off and run the engine.
If you see bubbles you need a head gasket.
The intake gasket is another source of coolant leaks and at this area the coolant can be sucked into the engine and produce a white smoke.
Does the car run rough at the first start in the morning....could be antifreeze burning off in the cylinder or area that was leaking overnight meaning cyl gasket or intake gasket.
Look at the rear head to block area below the exhaust manifold.
Is there any trace of coolant or stains of coolant......yes means head gasket time.
Pressurizing each cyl at a time with air with the valves closed in that cyl will quickly show the location of the bad head gasket with bubbles coming out of the fill tank on the bad cyl (s).
Head gasket leaks don't always mean milky oil.

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1 Answer

Problems refiring 99 pontiac grandam gt 3.4 v6


That is an intake backfire, meaning you have the valve timing wrong. Not quite sure right now on what it should be but check timing belt position and valve timing gear positions.

Aug 28, 2008 | 1999 Pontiac Grand Am GT

1 Answer

Car gets overheated


Better check to see if the water pump is leaking, or if the radiator hose has a leak or the radiator it self. Also, could be the thermistat sticking. Better get checked if not you'll be replacing the intake gaskets and the head gaskets. If it gets too hot the it could ruin the motor or warp the heads and that is very costly. If the heads get warped it is possible they can be fixed. Hope this helps.

Jul 30, 2008 | 1999 Pontiac Grand Am GT

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