what does the 180 t*stat do?
it might be a stupid question but im new to this
should i get one and how easy is it to put on[/i]

Your stock thermostat allows coolant to start circulating through the block at 195 degrees. A 180 degree thermostat would open sooner, keeping your motor a little cooler. If you've got a stock motor there'* not much use in installing one, but if you're planning to do some modifications it is one of the first things you should change. They are pretty easy to change, though it will involve draining some of the coolant out of your radiator.

thanks yea im going to be gettin a smaller pulley,FWI,PCM

Then you'll need to go ahead and change the thermostat. I'm not positive if it'* in the same place on an L67 as it is on an L36, but here'* a picture of my motor.


As you can see the radiator hose leads from the radiator back to the housing on the lower intake manifold. After draining some of the coolant out of the radiator, simply unhook the radiator hose from the housing, remove the two bolts that secure the housing, and you'll see the thermostat sitting right underneath. You can pull it right out and pop a new one in, making sure to use new rubber rings or transplanting the old ones from the stock thermostat. If the mating surfaces between the housing and lower intake manifold had a paper gasket, you'll need to use a razor blade to remove all traces of the old gasket from those surfaces and install a new gasket. I would also recommend applying a thin bead of RTV silicone sealant on the new gasket before setting the housing back in place and bolting down.

If you pick up a Chiltons 28200 repair manual for Bonnevilles it will explain the procedure fairly well, in addition to listing the torque specs for the bolts in the thermostat housing. If you're going to be wrenching on your motor, you ought to invest in a Chiltons.

i hope this isn't too old to bring back up... if it is im sry mods!
anyway - - - i was thinking about doing this to my car... and i have a few noob questions,
How do i drain the coolant?
Where do i get the new Thermestat, Cost?

Thanks.

I typically don't even drain the coolant. When you pull the thermostat housing off the coolant will drain out. You can pull the radiator hose if you would like so you have less mess, but typically it isn't that big of a deal when you change your tstat. You just have to make sure you top it off when you put it back together.

You can get a colder thermostat at most autoparts stores although they won't want to be very helpful because they will tell you its dumb to change your tstat.

Shawn

The easiest way to drain off some coolant is wtih a small vacuum hose into the radiator. 1/2 gallon should cover a thermostat change.

Your local parts stores should understand their parts numbering on the thermostats and know which numbers refer to the temperature. Average thermostat runs $5-8. There are two gaskets when replacing a thermostat, one paper for the water outlet and one rubber for around the thermostat. Make sure you have both on hand when changing it.

Location on the L27, L36 and L67 are all the same.

I just dropped a 180* thermostat in my car about a week ago that i got from ZZP. i bought the regular one, then just drilled three 1/16th inch holes in it around the lip. You can get the new gasket from schucks for less than 2 bucks, and the o-ring from car quest for less than 4 dollars. Just one way to save money.

So far ive noticed a pretty big difference in my cars performance for something so small. by cooling the engine it actually drops the air intake temps a bit, which is big for my supercharged car, so the air is a little denser and i can squeeze a little more power out of it...some stupid girl from my school rear ended me the night after i installed it...her GTI crumbled into pieces and was totalled, my 96 SSEi broke an exhaust tip and the bumper has some scuffs, but thats about it...lol...well, the steel bumper is kinda retarded now and you can see the shocks collapsed about 4 inches worth...i love this car so far...so im thinking insurance money=upgrades for my engine...lol...

-Brian

ok thanks for the help guys