Want to replace the t-stat on my 01 1500 3.9 w/ a/c. Man is that thing buried. Looks like at least the Alternator gotta be moved, maybe the A/C. Any shortcuts/tips? Looks like a half day job for this one.
Thanks
Matt

 

I have a 2001 and to change out the t-stat would take less than an hour for the 3.9L with no rear HVAC.

- Disconnect the battery power.
- Crank the tension belt pulley back and slip off the belt
- remove the alternator
- drain the radiator if needed
- undo the hose clamps to the metal chimney over the T-stat
- remove the chimney metal stack (care of not breaking the two bolts in the block)
- pop out the t-stat
- clean the old gasket residue the best you can (very important)
- place in the new t-stat (180 is ok or 190 is best for MPG results)
- place on a new gasket
- clean the chimney base and place atop the gasket
- finger tight the two bolts
- with 20lbs inch force, tighten the bolts
- place on the hose and clamps
- fill radiator if needed
- put back the alternator
- put the belt back on and under tension
- connect the battery
- start the engine an look for leaks
- no leaks, then go for a drive and monitor the temp rise and change

 

Thanks Stev. It has no rear hvac. Good detailed post.
Matt

 

Well, it's somewhat still fresh in my head since replacing the entire cooling system last Spring.