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Here's some instructions for thermostat replacemnt on the v6 engine. It's involved but not to difficult and much easier if its above 25 degrees!
Make sure the engine is cold otherwise you'll have to come see me at my other job(er RN), and all instructions are as if you are looking at the engine from the front of the car.
1. Remove engine covers -4 torx and 1 10mm bolt.
2. Remove the intake planum (silver air intake tubes).
a. take off wiring harness -2 10mm bolts and 1 e-torx on the back, and 1 10mm bolt on the right side.
b. unhook throttle and cruise cables from the back left -open the throttle to make slack and unhook.
c. remove brake booster hose on the back right -17mm open wrench.
d. take off 2 rubber hoses connected to the throttle body(square part) on the left - 1 spring clip the other just yank on it, ha.
I found it easier to take off the airbox and air mass meter to get at the bottom of the throttle body.
e. take off the air box (big black square box to left of engine) -2 screws and 2 clips, 1 hose clamp and 1 elctrical connection.
f. remove airmass meter and the rubber intake tube -2 clamps and 1 electrical connection on the AMM plus make sure to take off the elctrical connection attatched to the back of the rubber intake, just pops out.
g. pull off the 2 rubber hoses and one white plastic tube from the bottom of the throttle body.
h. unhook 2 elctrical connections on the front of the engine above the front valvecover.
i. take off 1 elctrical connection and rubber hose under the back right of the silver intake, just pull them off.
j. remove the 7 13mm bilts from the front of the intake planum (some are bolts and some are nuts.
k. lift up the planum over the studs and tip back toward the cabin.
l. unhook the 6 yellow elctrical connections to the fuel injectors.
it should be loose enough now to set aside. Save the paper gasket between the intake planum and the intake manifold or replace.
Hope you're not in a coma after reading all that. Oh by the way drain the coolant before taking out the stat. i forgot and made a huge freaking mess. Anyway you don't need to remove the fuel rail but if you want to its connected to the upper intake manifold by -7 e8-torx bolts and 6 clips that hold the rail to the injectors pull them back toward the intake manifold to remove, but they are a ginormus PIA to put back on.
3. Remove the 2 gas lines on the left side of the fuel rail -17mm and 19mm open wrench. GAS WILL SPILL OUT! but thats why the engine is cold.
4. Remove the upper intake manifold -6 e12-torx bolts. Gently take off the green gasket and save (notice the 4 bolts underneith it.
5. Remove the lower intake manifold -12 e12-torx bolts(these bolts have thread locker on them).
6. Remove the upper radiator hose - 1 hose clamp. You did drain the coolant right?
7. Remove the pipe connecting the stat and the upper radiator hose - 1 e12-torx bolt on the front of the engine by the oil check tube( this bolt had thread lock as well). Replace the 2 rubber o-rings at the end of the tube.
8. Remove the old t-stat -2 e8-torx bolts. Clean all the surfaces and replace with the new stat.
Install is the reverse.
Hopfully this is some help to someone, this is a good time to do plugs and valve cover gaskets as well. Check out Michael P's instructions for that.
Mike
'00 9-3
'90 900t vert
'73 96
'95 900SE V6 (new to me)
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