Overheating problem

[NCGTS]

Hey folks - quick update.

Shop has tracked down the problem to a crack/leak in the thermostat housing. It's sucking in air over time, and leads to a lock condition on the thermostat. I want to just replace the housing (it's 20 years old, I guess it's time LOL) gut can't seem to track down the right part number. If anyone can hit me up with whatever I need to secure for a 99 GTS, I would appreciate it.

Thanks!

[Steve-Indy]

Try 04763779AE....check it before ordering !!

UPDATE: Mopar parts on line shows part as discontinued...noting that you need to skip the "0" at the front end of the number on these Internet sites.

It is always worth a try to VISIT your local dealer to see if they can track these legacy parts.

If that fails, try Don Scharf Automotive in Wisconsin...they MAY have a used one.

If all of that fails, try to find a shop to weld/repair crack.

[98RedGTS]

If you find 2 let me know as I could use a new one. My bleeder screw stripped out on mine.

[dave6666]

I would not agree that it's normal for your thermostat housing to crack because it's 20 years old. The same logic could then be applied to the engine block, transmission housing, diff housing, and so on.

[GTS Dean]

My bleeder screw stripped out on mine.

Drill and tap the hole for the next size metric plug. I believe the bleeder is 1/8" NPT, and moving up to 1/4" may not be possible. Alternatively, have the stripped hole welded shut and re-drill and tap for 1/8" NPT.

[dave6666]

Or, just add a bleeder port in the upper hose.

[98RedGTS]

Drill and tap the hole for the next size metric plug. I believe the bleeder is 1/8" NPT, and moving up to 1/4" may not be possible. Alternatively, have the stripped hole welded shut and re-drill and tap for 1/8" NPT.

I actually already did that. The plug didn't seal real well as it kept weeping after a drive so I sealed it with some RTV as well. Would like to gain back the proper function of that piece so if I come across a good used one I would pick it up.

Or, just add a bleeder port in the upper hose.

Yeah, I went back to my hose that has the Roe bleeder in it until I come across a new housing at a decent price. It works for now.

[GTS Dean]

I bought a 1/8"NPT x 4" brass nipple, a coupling and a radiator-style drain butterfly valve to elevate the t-stat bleeder up to near the throttle balance shaft. That would get the bleeder up very close to the heater valve height. Unfortunately, the square plug in the housing was stuck solid and a great idea awaits a later opportunity to become reality. I'll have to drill the plug, use a little concentrated heat and try an easy-out next time.

[Steve-Indy]

Dean, when I bench tested a new T-stat cover's bleeder at room temperature, it took 42 lb-ft of torque to break it free. I was lucky I did not break what looks like a rather fragile casting.

With heat, I suspect/hope that your plug will come out easier as the resin (Loctite??) softens.