Anyone in the DFW area want to come to Frisco and help me with replacing the Thermostat in my 06' 3? I have all the parts. All the mechanics around here are quoting $250+ just for labor and compared to all the threads on here about how to do it, it looks pretty easy after the radiator hose is off. I just want some guidance or at least someone to say do it this way. Every task I do myself to the 3 usually gets done but is a pain with my mechanic knowledge..
I'm willing to pay $100 or so too..


Thanks,
Keith
214-449-8494

 

detailed threads here if you search and find. take your time on a nice day!
I take a lot of pics when I take apart anything.

 

This weekend I hope to be installing an inline thermostat/housing from Jegs and then taking out the stock thermostat. Hoping that putting the thermostat where its easily accesible and on the other side of the radiator helps even out temps and less of a hassle to change when its time again. Just waiting on FedEx.

 

@rsc,
curious about the repositioning of the stat. how do they justify moving it from the gm design point?
I assumed gm had a good reason for putting it in the unusual point they designed it to.
it seems that the old way was to just stick it at a convenient design point and also ez service so it just seems like the new spot has a reason??

going to the other side might upset that? who is jegs?, what do they say
?

 

I hate typing from my cell phone but here goes...

JEGS Performance Auto Parts - Holley - Billet Specialties - Edelbrock - MSD - Moroso - Mr Gasket - Free Shipping on All Orders @ JEGS is a performance parts company, they carry stuff from generic parts to crate motors and about anything inbetween to help build your race car and keep you poor. I got the idea for the inline thermostat housing from a couple of threads on this or some other Hummer forum where another user posted his experience trying to keep lower and more stable coolant temps in summer heat. In his experience it worked better than expected. Another poster came up with a similar idea and joined in later. The idea of moving the thermostat to the engine out side of the radiator is to keep a more steady flow of coolant reaching the engine vs. the thermostat opening opening and closing more frequently. Basically letting the ENGINE temp determine when it needs the thermostat opened instead of the RADIATOR temp drive the show.

 

I looked at my 3 again and since I have the rancho lift, it actually looks like an easier job than most since I have much more room between tires and wheel well.
I'll most likely be doing this job one day this Fri-Sunday, so again if anyone in the area wants to check it out let me know.

I also found this video which is for the colorado but it def simplifies the job.


Thanks again.

 

first,the thermostat is always the boss on temp control,it decides.
then,in july at 95 degrees the engine still wants to run better hot, 100 deg higher at 195.
if they wanted it cooler you just use a lower t stat, or none!!

input/output? on the out side it seems that all hot coolant would need to pass the stat b4 it closes,letting in all that cooler rad coolant till it goes all the way through to the stat. a big cool change.
on the in side it seems a little cooler coolant would reach the stat more often making less abrupt big changes.
remember,the goal is to run as hot as possible without boiling the coolant. so the pressure cap helps to prevent boiling

I have detailed the temp every mile from startup in summer to max of 195 and even sitting with a rug over the grill I didn't go above 195 till I shut down and heat soak pushed it a little higher.

I love messing with cars but im a skeptic on many mods that may be motivated by selling something more than doing something!

 

For the past few summers mine has been running 220 or more on the scanguage, summer temps stay over 100 and 110 is not uncommon, running 75-80 at legal hwy speeds can have the temp pushing 230. This mod will allow me to allow me quick access to change out thermostats for winter/summer conditions if needed.

You are right, the thermostat IS what controls coolant flow. Where that control is located is also important. Putting it after the radiator means it sits in cooled fluid, before the radiator it sits in hotter fluid so it is being asked to respond to the temperature of the coolant as it is inside the engine, not after already being cooled in the radiator. The experience of the two separate posters showed lower gauge readings with less fluctuation in use as the thermostat didnt cycle open/closed as often and better temp control at extended idle in 100+ temps. If for no other reason than ease of access and having a variety of thermostat options, this mod is worth it in my mind.

 

Nice find on the vid, looks like a pretty straight forward job....

Not sure I like the looks of that hose clamp never liked that pinch style but thats just me..

I have a 3.7 is the stat located in the same place as the 3.5 ?

 

Same location for 3.7.
I actually just found this done on the 3.7.

https://sites.google.com/site/happyh...ts-replacement