Last post on Feb 11, 2009 at 4:47 PM
You are in the Pontiac Montana
What is this discussion about?
Pontiac Montana SV6, Engine, Van
#31 of 62 Re: Overheating - 2002 Montana Pontiac [tigeroverflow]
Nov 13, 2008 (10:59 pm)
That sounds much like what mine was doing but it wasn't the head gasket, it was the intake gaskets which are notorious for going bad in these vehicles. With the help of a friend, I replaced them instead of paying the $2,500 to have someone do it. If you and/or someone you know can fix this problem yourself then you will be in it for about $200 worth of seals. It's time consuming but you'll gain alot of knowledge in doing it.
If you just want to get rid of it, you won't get much for a vehicle with an engine problem, especially with the price of gas and a vehicle that isn't fuel efficient IMO. Either way, you're options aren't too appealing.
#32 of 62 Re: Overheating - 2002 Montana Pontiac [beowulf58]
Nov 14, 2008 (2:30 pm)
Thanks for your input. I am checking on your point -- I believe the last mechanic said the intakes were "done" already. He pointed out to me, to areas on each side of the metal-looking thing in the middle of the space under the hood (gee, I sound like such a girl saying it this way -- but I know it wasn't the rad, but I don't know if that was the engine?) Anyway, he said those two things, one on each side were "done".
And - - I will call him to check on this.
Do you know how to run a hydrocarbon test?
#33 of 62 Re: Overheating - 2002 Montana Pontiac [beowulf58]
Nov 15, 2008 (5:03 pm)
Just a quick update - I went down and did my own check on the van, which is parked outside the mech's garage....oil is "clean", and rad isn't splashing back coolant when engine is warm. Intakes were "done" (dealership done - before I got van).
Do you know anything you can "share" about fans and fan relay or the piece that attaches to waterpump -- could this be causing the symptoms for overheating?
Talked to mechanic today -- same shop / other sr. guy - he doesn't think it is the water pump...(but he's guessing).
Plans to do htdrocarbon test and pressure test Monday.
I keep feeling like it is maybe one of the fans not kicking in properly -- but I don't know if this is they relay(?) or the fan...? It seems one fan definitely runs, as it blows cold air. Then suddenly something seems to "kick in" (like an engine "cough") - perhaps the other fan????
#34 of 62 Re: Overheating - 2002 Montana Pontiac [tigeroverflow]
Nov 17, 2008 (11:16 pm)
Don't worry, Tiger, I won't pick on you for not knowing what something is. I do like how you pick on yourself though. Anyway..
If your mechanic says they were done, I guess it's a matter of how much you trust him. From just pointing it out won't do much since the seals are sandwiched between the valve covers and the head. Hopefully whoever replaced them did NOT use the anti-freeze that GM used. It is believed this contributes to the wear down of the seals.
No, I don't know how to run a hydrocarbon test. My guess is plugging a code reader in will tell if their are any emissions issues. They are quite easy to use and if you have a book, which I do, it will tell you what the problem is and what is needed.
Hope this helps.
#35 of 62 Re: Overheating - 2002 Montana Pontiac [tigeroverflow]
Nov 17, 2008 (11:21 pm)
Sure, a bad fan can cause overheating. Electric fans run on a relay that turns them on when the water temp reaches a certain temperature hence the warning near them that says, "fans may turn on at any time." If you have a bad relay to them, it's the same effect. If it fails, it may not turn your fan on at all. You have two fans, one is the cooling fan which is automatic, based on engine temperature, and the other works when you use your air conditioning.
The water pump is it's own part and is mounted into the engine block. It does just what it says, pumps the fluid around the engine. A fan won't affect it, at least, it shouldn't.
Dec 08, 2008 (3:10 pm)
i have a 2001 and it runs good but wont idle.I replaced the throtle position sensor and idle air control valve
#37 of 62 2002 Pontiac Montana making squealing noise
Dec 10, 2008 (3:57 pm)
We have changed pulley after pulley the water pump has been changed the power steering pump has also it just got changed the other day and after it got changed it is sluggish to start up and it still squeals really bad i was told that it might be the alternator, i really don't know what it could be could someone please help? thanks for your time.
#38 of 62 2001 montana wont idle
Dec 11, 2008 (3:31 am)
wont idle ive changed the throtle postion sensor and the idle air control valve.please help i dont have any thing to drive.
#39 of 62 Re: HELP! 2004 Pontiac Montana. [dsgentili]
Jun 11, 2009 (4:42 pm)
My Moms Montana did the same thing....go and get a Throttle Positioning Sensor for about $35... they tried to tell her it was the intake gaskets leaking and wanted her to pay $1800....she called me and I told her it was the TPS and since we replaced it she has had no more problems with her van speeding up on it's own...hope this helps if you haven't already figured it out.
#40 of 62 Re: HELP! 2004 Pontiac Montana. [havnfun2]
Jun 11, 2009 (10:37 pm)
Thank you for your posting. This would have been an interesting thing to look into. After mechanics were split as to what was causing the problem, it was recommended by "all" to trade in my much-beloved van. So, after it overheated on the freeway - during a test drive related to the trade in (!!!) I really had to trade it if possible and did. The GM dealership gave me full value and a good price on a Chevrolet Uplander 2006 w/ low miles. It is NOT the van the Montana was - so miss the Montana! An almost loaded Uplander is a bad joke compared to the Montana - so many things missing, lower power, just everything. But for now, will hang on to the van, for timing of other things in life issues. Bigger picture - if the used car economy was a stronger market, I would get rid of it for a Montana - even an older one. Got the Uplander in December. It is going into the dealership for more repair work - for I think this is the 5th (!!!) time. Problems with gear shift getting stuck, horn still doesn't work, had a nearly broken tie rod that dealership didn't fix before selling the van, and the list goes on. Thankfully, other than wasting time, it has a happy ending since I bought the most extensive full five year extended warranty. For anyone listening to this - get the warranty. At $2000 it is a bargain! Less than six months into this - if I had had to pay for all these repairs out of pocket, I would have been out of pocket at least another $500 by now. The warranty covers first dollar - so I have had no additional money paid out. Meanwhile, Pontiac Montana - the model I had - wonderful van. Should have just put the $3-4000 out and fixed it, hindsight.