sranjesuper: i'm a mechanic i just did this job 2 days ago on a 3.4 montana, i removed
the throttle body and was able to access both bolts with a small 13 mm
Gene Reeves: Thanks for the very informative video-helped a lot.!!!!!!!!
Eric Brooks: How did you remove the top bolt without removing any of the surrounding
Gabriel Palma: thank you rich for the info
Allen Christo: Yes, she sure will. She's worth it. In the Spring I'll get that one rust
spot. She'll look like new. 8o)
csx3309: Hi just wondering if you have to take the bottom bolt completely out seeing
that the thermostat housing is slotted on the bottom bolt ? you would think
with that design you could just loosen it enough to remove the housing?
Terry LaMasters: Thank you for your video. My friend is a mechanic and he told me how to
change the thermostat. After looking in the engine compartment, I realized
that I was intimidated. After watching your video it helped me to
understand I can do it and how easy it was...except for the bottom bolt.
Thanks again for your video since I am a Buick Rendezvous owner.
Michael Faith: Great video! I can't thank you enough! I have an '02 Alero 3.4L so it was
a little different. Not an easy job but MUCH easier after watching you.
The guy at Autozone said the instructions he had in his computer system
said that you need to take the exhaust manifold off. I can see how that
would make it easier but after looking at those bolts, I didn't want to
take the chance of breaking half of them off.
My son is taking his driver's test this Friday and they won't let you take
the test with the "Service Engine Soon" light on. Thanks to your help the
light is off and we're good to go!
Betsy Willey: Your video was very helpful thank you, the only thing I would change is to
mention about he sealer/gasket glue.
Jon Bell: that bottom bolt is so hard...i do not understand why he doesnt take off
the crossover pipe. if you bump that thermostat and it comes out of place
your screwed...if possiablejust take off the exhaust crossover pipe
GUALLACOL: Excellent video, thanks!
t72w3qz: As the thermostat housing is slotted for the bottom bolt could you possibly
pull the bolt most of the way out, leaving it in place with a few threads,
and still remove and replace the housing with enough room for the housing
to clear the thermostat?
4Mary6: I also wish to join the chorus of thanks. This video was just the
information I needed. I didn't have the curved wrench that you have. After
looking around the internet I found a specialty wrench on eBay called a Cal
Van 751 GM Thermostat Wrench. It is a U shaped wrench that fits under the
exhaust manifold to get that lower bolt. I had to place a piece of wood on
top of the transmission block to hold this wrench in position. I also had
to use a 8" cheater pipe to get enough leverage to finally get the lower
bolt to loosen up. After that, it was just as you showed. Thanks again!
Chris Oursler: very helpful thank you
Oleg Deyev: I am Russian guy, and your direction helped me to replace thermostat on my
Chevy Malibu by myself! Thanks a lot!
richpin06a: Glad i could help.
Thrishmal: Thank you for the reply, will have to look into that.
richpin06a: Off the top of my head i can not remember what the size is.A junk yard run
might be in order.
casinero55: That ridiculos bottom bolt is a pain in the a... and in the ba.....too.
Selfish bastard: Changed this thermostat along with lower intake manifold gasket, then it
over heated again due to external radiator fluid leak. Now it is running
too cold.. Do I have to do lower intake manifold gasket job again? Or Am I
good just replacing the thermostat again?
ATXs Navbuoy: I normally take my time - the exhaust is in the way but the bolts look
rough and I didn't want to touch them. So I took off the hose off the fuel
rail and removed the sensor above it from the throttle body giving my
enough room to get my wrench in and loosen that infernal second bolt. Great
Vid by the way - thanks for posting!
richpin06a: Are you getting hot air out the vents....if not the place to start is to
check the heater hoses were they go through the firewall.Both should be hot
when the car is up to temperature.
John Doe: Does it matter what position the thermostat sits vertically or horizontally
in the housing? Mine had quit a bit of play when I finally got the housing
removed and I'm not sure how it was originally seat in there or if it
matters. Awesome video by the way. That bottom bolt is a pain.
richpin06a: 7mm on that bolt.
pitchshifter78: Would this be the same for my 95 Cutlass supreme 3.1?
Ernie S: I did everything as you showed, except used a ratcheting wrench on the
bottom bolt. It worked well. The whole job from opening the hood to finish
around 35 minutes.
richpin06a: I had to use a 13mm carburetor wrench.
KmAlbum: thanks lots. I'm just glad I won't have to take off the X-over exhaust
pipe. That'll be a pain in the butt. Especially those exhaust bolts gets
rusty really bad over time.
richpin06a: That curved vw wrench was used for the tough to get at 13mm nuts that held
on the carburetor.
Butch Belanger: Rich, Thanks for the reply. Unfortunately the thermostat didn't stay in
place. With that said, is it still possible to remove the housing without
taking the motor mount off? What are my other options? Thanks, -tom-
richpin06a: If it has a jiggle valve that goes up but the ones i replaced did not.Did
you compare the new to the old one to make sure it was the right one before
Jeremy Oros: good video.. i was frustrated with that bottom bolt.. now I know how to get
on it, thanks!
richpin06a: Now i know to stay away from the Aztek.
Rok Myong: 01 Venture 3.4l is terrible , there is no room for housing to come out most
guy will spend 2 hours easy good luck you guys! what a bad design! no
wonder Chevy go broke!
richpin06a: I do not know what to say other than make sure the thermostat stays in
place while you are removing the water outlet.
Kiddro22: Yeah I noticed that also. Now I have better confidence in doing the job
now. Just completely loosen and take out the top bolt but just loosen the
bottom one till u can slide the housing out. Sweet!
OSIRIS531303: I am so dreading this task. I have a 95 lumina v6 3.1 . Not looking forward
to it at all. Glad the part is only gonna run me 10 bucks.
jeff darnell: i could not agree more, i watched this vid about 3 months ago trying to do
the thermostat. it got done, if i remember correctly it took like 3 hours.
i eventually just took stuff off till i could get to it. Now im watching
videos again trying to find a way to access o2 sensor. which of course is
just out of reach and blocked by about 5 different things.
leem: I let car idle for 30 min drove it for 10 min, got gas and then it started
slowly overheating. So it does not overheat right away. It was doing thiis
this the last 2 weeks but after a while the temp would go down(thsrmostat
opening maybe?) . But the temp started getting higher each day before it
sould go back down. And now when it goes up it does not come back down.
Also both fans are running.
Mark1944089: How did u know it was the Thermostat?
richpin06a: The 3400 is a tight fit but it should clear.
leem: also no mixing of oil and coolant
alaskalograft: having the same prob. got the housing off with the bolt still in but seems
a real pita to get it back. taking a break till the am...
richpin06a: I would tray to push the thermostat back in place with something thin while
you remove the water outlet.
Rob Behler: One of the best how-to mechanic videos I've seen. You do a great job of
explaining exactly how to get at that difficult bolt, real good job! I'm
sure I'll be checking more of your vids out in the future as I work on
different vehicles. Keep up the good work! : )
larry hughes: no i am not it worked for a month last winter and it has not worked since
and my car is not running hot or nothing just no heat.
larry hughes: when i have heat on and put it from hot to cold, temperature stays the same
my heater is not working what do you think this is rich
richpin06a: Those exhaust crossover pipes near the thermostat vary a little but it
should be very similar.
Simon Foulkes: I just replaced on and the housing for the bottom bolt is notched and you
do not need to take it all the way out. It is some what complicated because
the thermostat sticks out but we did it and then did not have to try to
start the bottom bolt. Not sure how he was able to reach the bottom bolt I
could not reach it with my fingers