Question about 2002 Pontiac Montana

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I have a 99 pontiac montana i have had a head worked, intake gasket and went thru 2 radiaiors what can be makin my car still run hot and bust my radiator

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Check the thermostat it may not be opening also there is a bleed screw this needs to be opened while filling the radiator and the engine is at operating tempreture. to let the air out of the system otherwise no water circulates through the engine.

Posted on Jun 03, 2010

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My 99 Pontiac Montana Keeps running Hot.I replace the thermostat , Coolant Sensor..Is It possible that the water pump Is Bad?

The radiator may be plugged or the head gasket can let compression gasses into the radiator . To check, run the engine without the radiator cap and look in to see if there any bubbles in the coolant. If there is a lot of coolant moving in the radiator after the T/stat has opened, the water pump is ok. If not then suspect the water pump is not circulating enough water.

Nov 09, 2016 | 1999 Pontiac Montana

1 Answer

2000 Pontiac Montana that starts and runs fine for 7-12 min then looses throttle power. Sputters at 1k-2k for 10-15 min then runs fine for 7-15 min then runs even worse, wills sputter at 750+ rpm.

3.4L Engine Sensor Location Pictures and Comments
the battery for a few minutes to see if that helped. ... If the gauge is at half way on the first start, then yes, either the ... All of a sudden I could not accelerate and the carelost power. ... But once the temperature gauge goes to normal it will run fine. ... 3-7-12. I replaced head gaskets and intake gaskets on my 2000 Pontiac 3.4L

[PDF]2000 Pontiac Montana Owners Manual - GM Extended ...

Nov 28, 2015 | 2000 Pontiac Montana

4 Answers

99 pontiac montana overheaten already changed thermostat what is it?

you have a GM common problem and that is a bad intake manifold gasket. GM change the gaskets to plastic and they crank and leak causing over heating. here is a picture of one i took from a 2005 pon. bonneville with 74,000 miles on it2_12_2013_3_00_09_am.jpg

Feb 12, 2013 | 1999 Pontiac Montana

1 Answer

My 2001 Montana is overheating with fans running, full of coolant, new thermostat what else could cause overheat besides small intake leak

head gasket and/or cracked head..notorious for it, usually rear head, but if ya pull it down do both head gskts and send heads outto be checked for cracks

Apr 17, 2012 | 2001 Pontiac Montana

2 Answers

I have a 2001 pontiac montana . the head gasket is blown .. my questions in ,dcan you re and re the head gaskets with the engine in place. or (like some gm carS) does the subframe need to be dropped to...

yes, the heads can be removed with the engine in the van, make sure to have the heads tested for cracks, the 3400 V6 has a bad problem with cracking.....HAVE FUN

Nov 15, 2010 | 2000 Pontiac Montana

1 Answer

I did a head gasket on a 99 pontiac montana 3.4L. I did not mark my valves when i pulled them out and already put the heads and lower intake on and do not want to pull them all off to figure out which...

are you talking about the push rods, if so the short ones are for the intake valves and the long ones are for the exhaust valves their are only 2 different lengths

Jun 11, 2010 | 1999 Pontiac Montana

2 Answers

2003 ponitac montana... Not holding

need to perform a coolant pressure test. fill the reservoir and after the engine cools down fill the radiator, next start the engine and wait till the coolant system builds pressure then turn off the engine and using a mirror and flash light look for a leak.check water pump, hoses,radiator tanks for cracks,intake gasket at the corners espesically at the back next to the trans.also pull the carpet back and check for coolant leaking from the heater core,and last remove the sparkplugs and check for leaking head gaskets.hope this helped.

Dec 06, 2009 | 1998 Oldsmobile 88

2 Answers

No rear air or heat in 1999 pontiac montana

If ac works & switches I'd check coolant level low coolant or air pocket will cause this for long run. if low ck water pump, intake or head gaskets known problem on 3.4 engine

Aug 29, 2009 | 1999 Pontiac Montana

3 Answers

Help me with a motor interchange

Believe it or not all GM 300 series motors are very similar and they all give head or intake problems whether its in the grand am, grand prix or montana the 3.4 is just that a 3.4. GMs not going to make a different 3.4 for each car they're all the same, it will fit. Do yourself a favor and make sure its not the intake gasket thats the actual culprit.

Mar 18, 2009 | 2001 Pontiac Montana

1 Answer

Temperature gauge shows hot

head gasket does the overflow bootle have bubbles in it when idleing warm if does most likey rear head gasket.

Jan 04, 2009 | 1999 Pontiac Montana

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