Question about Pontiac Montana

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Head gasket leaking under thermostat and i wanna do it myself just need picture's before i go ahead and see whats the problem

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Repair manuals with pictures are sold cheap on eBay. and/or you may find a video on youtube.com

Posted on Apr 11, 2011

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2001 pontiac sunfire will not hold any antifreeze, why and whats wrong with my car????


General advice:U must track the leak .How much it takes to loose the coolant?.If the coolant shows under the car must identify the tubes clamps that need tighten or replace.If a radiator related problem need clean/solder/replace.If leaky water pump,replace.If no trace of coolant ceck the oil.If is color altered(milky)u have a head gasket ahead (with head revision)or a broken engine block/piston cyclinder.If the oil is ok,ceck the smoke:whity smoke means coolant in the pistons head.Again best guess:head gasket (can leak also in the intake manifold).Very rare coolant shows in some cars in the power stearing oil (!?) track the tubes.Tip:colored coolant (green...)is better visible in leaks.Tip:water coolant may show rusty spots where dissapearing (radiator,expansion deposit,pitched tube).Hope u deal it.Cheers.

Oct 24, 2013 | 2001 Pontiac Sunfire

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

2 Answers

Loosing small amount of coolant (about a cup) every few days in my 1995 GMC yukon. I lost coolant from a leak in the radiator and the engine overheated. Now the temp gauge constantly goes back and forth...


i hate to be the bear of bad news but do a head gasket check . most likely your head gasket is leaking a small amount and its getting burned off.

Dec 16, 2010 | 1995 GMC Yukon

2 Answers

My 1996 chevy suburban wont start


If you plugged the original leak (which sounds like the head gasket) and then the radiator was leaking, and you are having water coming out of the exhaust, then you need to replace the head gaskets. It sounds like you had a blown head gasket from the start. Here's what to do.

1. Replace the head gaskets (will need intake manifold gasket as it need to come off for this procedure).

2. Replace thermostat, radiator cap (if radiator is still good)

3. Replace water pump; the water pump may have stopped working (mechanical), which in turn caused the pressure to build an blow the head gasket (the cause of the pump would be a bad thermostat. If the truck was overheating, then the thermostat was bad to begin with, then the pump, then the head gasket, so then the only place left for the water to go is out the exhaust.

Here is a list of replacements:

^ water pump
^ thermostat
^ head gaskets
^ valve cover gaskets
^ radiator cap (if radiator is good)
^ radiator : if leak from cap caused any damage to radiator (should still be good)

**Also check the radiator hoses to ensure they do not have any "bubbles". Hot water over time (with anti-freeze) erodes the inside of the hoses, and begins to "dig" holes and grooves in the hose, which evetually cause leaks. Consider replacing these as well for safe measure.

Please, let me know if you need further assistance.

carsandcomps,

Guru, Premium Expert @ Fixya.com

Jun 22, 2010 | 1996 Chevrolet Suburban

3 Answers

Car has white smoke from tailpipe and under hood.


you got it so hot the rings have collapsed. Try replacing the engine. Sorry I can recomend a engine source let me know! dc

Jun 22, 2009 | 1990 Oldsmobile Cutlass Ciera

1 Answer

What is the cylinder compression psi fpr the 2.0 liter engine


usual on 4 cylinder around 175psi.225psi is very high for your car,150psi seems ok,you may have two problems.A leaking head gasket and high compression due to carbon build up on the pistons.Check your Hyundai Dealer to see is this problem is covered under their 100,000 mile warranty,it should be.IF not then
the head needs to come off and had gasket replaced along with clean the top of pistons since they are right there,sounds like and easy fix.also check condition of radiator,and I would rec. replacing thermostat since some Hyundai models had problems with their thermostats

Jun 14, 2009 | 2001 Hyundai Elantra

2 Answers

1997 Firebird over heating


Hi could be a thermostat or a head gasket
take the rad cap off a start the car see if there are bubbles in the rad if there are no bubbles then change the thermostat if there are bubbles then good chance it's a head gasket

May 11, 2009 | 1997 Pontiac Firebird

2 Answers

Overheating when idleling


Its not impossible for there to be a bad head gasket or leaking. But I agree with you the over heating will be there during driving as well. I would change the fan clutch and replace the thermostat, if the thermostat that was replaced wasn't an oem/delaer thermostat, I would change it. From prior experience with these type of vehicle the most likely cause of overheating thermostat and fan clutch. Aftermarket thermostat just aren't good for this vehicle I have proved it a few times for myself. Take my advise and change the thermostat with an oem one and the fan clutch with an oem. Good Luck. Get in contact with me if you need more help.

Dec 19, 2008 | 1997 BMW 5 Series

4 Answers

2002 GMC YUKON COOLANT KEEPS EVAPORATING


if you dont see antifreeze leaking anywhere,its the head gasket,check your oil dipstck,the antifreeze is probally mixxing with the oil as it leaks thru the gasket and will give the oil a milky white color on the dipstick,if you start to see white smoke from the exaust then its leaking into your exaust port,either way head gasket and change as soon as possible,you dont want it in the oil cause you can seize the motor

Jul 08, 2008 | 2002 GMC Yukon Denali

2 Answers

1993 Mercury Sable, white smoke, overheating


Good Day,

White some indicated that coolant is burning off. It could just be a simple leak which is burning off of the hot motor. It could also be a bad head gasket(probably what you don't wanna hear), One indication that it is the head gasket is white smoke coming out of the exhaust, this happens as coolant gets into the oil and is burned off then exhausted out the back. Possible causes for the overheating include, low coolant, coolant leak, thermostat, water pump and or water pump belt, or head gasket.

If I were you I would drain and flush the radiator, then fill it with new coolant, and change the thermostat, provided you have no white smoke coming out the exhaust.

hope this helps for now

Jul 05, 2008 | 1993 Mercury Sable

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