Well just got home from a day of driving. Things I have noticed. Pretty much no difference. Heater still blows just as hot. The engine seams to run better, but I also changed spark plugs from 5224, hard to tell if there is more power because the roads are still really slick.

I used a dremel to make the notch, but a small hand file would work. The notch does not really need to be perfect, just enough to clear the o-ring notch.

I have not heard anything about the 160, but 180 would be as cold as I would go on a my truck. 160 seams way to low, if the engine had a carburetor you might get away with it.

 

What spark plug/heat range did you change from and to?

 

well just got one at napa. not sure when ill install it. thanks though.

i heard bad things about 160's in 2gens, throws to many codes.

 

I went from Autolite 5224 - Heat range D11
to Autolite 3923 or 3922 I don't recall - Heat range - D11

I hope they are 3922 the same that the HO engine runs. Something tells me I put the 3923 from the 3.7. Crap I know I should have double checked that. All I know it that I do not like them. I will know on Monday when I get to work. If they are the 3923 I will change them out to the 3922 and see if they are any better. If not I will go back to the 5224

5224, 3923 and 3922 are all the same heat range according to the web site.

 

3923s are one range colder than stock (everyone says), I run the same heat range except they are NGK 4644s.

 

what it that water pump??? what is different than stock??

 

i usually run 195 in the winter 180 in the summer.
with the 195 when temps dip down into the -30's - 40's (god bless edmonton) i usually read about 182-190.
with the 180 in the summer i usually read about 179 -189 (up to 200 with ac on)

 

So.....bottom line. What will this mod do? Is it another power wire or does this give some benefit?

 

with my custom tune in my 1989 gta and 2003 sliverado i installed a 160 degree so with the custom tune i can add some advance to timming without pinking and gain some hp....

 

The water pump is nothing special that I can tell, the propeller looks almost the same as stock. The reason for my change was the bearing was going.

Cooler engine to an extend is a happier engine. Every 10 degrees you drop the engine temp is good for 1HP, So nothing major