What temp thermostat?

Shane91Explorer · October 24, 2001

I was just wondering what the factory thermostat temperature is? Can anyone tell me? The "X" is taking FAR too long to heat up in the morning, leading me to believe it's stuck, or been replaced with a 160 or so. The needle doesn't even reach the N in normal (it's a 91). <HTML><B>Thanks a bunch!</B></HTML>

Shane91Explorer · October 24, 2001

damn it, my html didn't work, LOL

mrboyle · October 24, 2001

The stock t-stat should be a 195 deg.

rpenner54 · October 31, 2001

Well my t-stat is on the fritz... The clostest time I can replace it is on Friday night so looks like I will be doing that. I have done it once on the green truck but I sure don't remember which brand to get, anyone got any good recomendations? My truck is overheating driving down the highway and running the heater full blast along with the windows down is getting old.

kps36 · October 31, 2001

Stant has always been a good reliable name in Tstats. Make sure you get the o-ring gasket also.
Some brans have it, some don't. I get mine from NAPA and the Stant supplies the O-ring type gasket.
One other thing, consider changing out the temp sensor (on mine the one above the tstat on the pass side) This sends the temp info to the PCM so that if you replace that and you still get a low read, it is the other one (gauge sensor) but you can be assured the PCM is getting good info.
my .02

RTStork · October 31, 2001

Stant and Robertshaw make high performance t-stats. You can get one at Auto Zone or Pepboys. Try to stay away from the cheapos.

Maniak · October 31, 2001

I have found a trick that helps keep the temperature in the truck from fluctuating from cold to hot (other than burmping the system which helps but doesn't fix the issue). In Tucson, Az (it gets <25f in the winter and over 105f in the summer) so getting the right t-stat is important or you don't get heat in the winter or overheat in the summer.

Most if not all thermostats have a small hole in to let water pass when the thermostat is closed. Normally there is a small brass plug there to limit the flow through. What I have done over the last few years is to cut that plug out of the hole. When I install the t-stat I install it like normal, the hole side up. This helps let air pass through and it keeps some water moving. With the water flowing all the time (not much) the temperature stays more or less constant. I wanted to see if this was actually what was giving the constant temp so last time I installed a t-stat I didn't cut the plug out. The temp would read hot, the cold, the hot, then cold and eventually level out. I reinstalled the thermostat (same one) but this time I cut the plug out first. Now the truck warms up and the guage hardly moves once it is warm. I did notice that what used to take 1 mile to warm up now takes about 2 miles.. to me it isn't a biggy since I normaly start the truck a few minutes before I get outside anyway.

BTW.. I run a 195 t-stat

~Mark

RTStork · October 31, 2001

Thanks for the tip. I'll have to try it next time.

rpenner54 · November 1, 2001

Thanks for the help guys... I will probably get on this Friday night and get it done either that night or Saturday.

mercury · July 23, 2002

Question

MANIAK, when you say to cut the air bleed value out, do you mean just pull the little brass plug out and leave the hole the same size or pull the brass plug out and drill the hole bigger? Thanks....

Runnin'OnEmpty · July 23, 2002

After reading Maniak's post, I thought I would add this, FWIW:
Jeeps are notorious for getting air in the cooling systems, and having to be "burped". The cure is to drill a 1/4" hole in the thermostat, and mount it so the hole is to the top (Jeep t-housings mount vertically). This allows air to pass through with the thermostat closed, but still allows the thermostat to operate normally.

This would also even out the temp fluctuations a little, as Maniak said.

Maniak · July 24, 2002

I just cut out the little brass thing.

I have a "balanced" thermostat which didn't come with the hole. On that one I did drill a whole in it. If I don't do that I always get too much temp flux for my liking.

~Mark

What temp thermostat?

Shane91Explorer

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