Sticky Thermostat??

[styng88]

It's about 40 degrees and rainy in Pennsyltucky, and the Mrs. calls me because she's freezing her can off. She said the guage read normal, but no heat was coming out. She went to lunch, and viola, she now has heat. I haven't taken the radiator cap off since we bought it, so no, it's not air lock. Has this happened to anyone else? Is the stat a PIA to get to?

Mike

 

[chaz0_man0]

I call it the spring glitch. Every year this time I have the same problem. This morning it was 68 in the house and the furnace didn't kick on. So I just turn it up until it kicks on then back to 71. It only happens for 1-2 weeks in the spring.

 

[styng88]

Sorry, I'm talking about the stat in the Lib. I looked all over the intake manifold for it, but I have no idea where it could be.

 

[chaz0_man0]

LOL, Im a ********... :-s

 

[2003KJ]

LOL, Im a ********... :-s

LMFAO!!! =D>

I don't recall a t-stat having to be replaced in a KJ yet, amongst the group members.

This comes out of the 2003 KJ Facroty Service Manual I have on my computer. If you are interested in a copy of this, PM me and we can work something out.



REMOVAL
REMOVAL - 3.7L ENGINE
WARNING: DO NOT LOOSEN RADIATOR DRAINCOCK
WITH SYSTEM HOT AND PRESSURIZED.
SERIOUS BURNS FROM COOLANT CAN OCCUR.
Do not waste reusable coolant. If solution is clean,
drain coolant into a clean container for reuse.
If thermostat is being replaced, be sure that
replacement is specified thermostat for vehicle model
and engine type.
(1) Disconnect negative battery cable at battery.
(2) Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(3) Raise vehicle on hoist.
(4) Remove splash shield.
(5) Remove lower radiator hose clamp and lower
radiator hose at thermostat housing.
(6) Remove thermostat housing mounting bolts,
thermostat housing and thermostat (Fig. 7).
REMOVAL
(1) Drain cooling system below thermostat housing
level.
(2) Disconnect engine coolant temperature sensor.
(3) Disconnect heater supply hose.
(4) Remove housing attaching bolts (Fig. 8).
(5) Remove housing, gasket and thermostat (Fig.
8)

INSTALLATION
INSTALLATION - 3.7L ENGINE
(1) Clean mating areas of timing chain cover and
thermostat housing.
(2) Install thermostat (spring side down) into
recessed machined groove on housing assembly. Make
sure rubber seal locating tab is positioned in the corresponding
notch in the housing.
(3) Position thermostat housing on timing chain
cover.
(4) Install two housing-to-timing chain cover bolts.
Tighten bolts to 12 N·m (105 in. lbs.) torque.
(5) Install lower radiator hose on thermostat housing.
(6) Install splash shield.
(7) Lower vehicle.
(8) Fill cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(9) Connect negative battery cable to battery.
(10) Start and warm the engine. Check for leaks.




I'll post some pics later when i can figure out how to save them correctly from the pdf file.

 

[styng88]

oof. That sounds like a pain to do. If it happens again, I may be hitting you up for a copy of the manual. But until then, thanks.

 

[2003KJ]

no problem. I'd love to put the pics up, but Adobe Acrobat is a PITA with copying pictures.