I think you're right. I guess what I meant was that I'd read somewhere you should change your coolant when you add a 180*T-stat.

 

Chris, (and Drew, but I think i'm the one that told your this...LOL) as Drew said, my 3.5L has a 185 degree thermostat stock. I am willing to bet that your 3.9L has the exact same t-stat as the 3.5L, therefore i'm pretty sire you have a stock 185 t-stat. I would not change it from stock. Not to mention, the t-stat for our car is REALLY expensive compaired to your average t-stat. Most t-stats you can get for 10-15 bucks, ours is like 45-75 bucks. (depending on where you buy it, dealer was actually the cheapest at $45.) So I would not change it unless it needs to be changed.

 

This thread is useless until you tell us what kind of car you have. Year and Model.

Also the gains you expect from the car, and your budget. Also the knowledge and know-how you have to do things yourself.

 

His profile says he has a 1996 Z34.

 

I had a hard time believing that the newer Monte's t-stat's were so expensive so I checked Autozone's website just for reference. $75.99! Wow! That is terrible.

As far as the 1996 Z34 is concerned...well, at least you have OBDII

 

my theromstat cost about 75, rip off i tell ya!

 

$75? Where a thermostat for my car costs $10? What did they change!?

 

Yeah, really- why is it so much more?

 

I don't know if this applies to the newer monte's, but I know some of the t-stats in the newer gms are built into part of the housing, so that would cause the price increase. I replaced one in a 2004 Envoy a month or so ago and it was built into the housing and was right around $70-80 list

 

Your first question was cheap mods, what do you consider cheap?

Exhaust (GMPP stainless), PCM, CAI, Downpipe, little at a time

Aaron