Engine Temperature Survey

misterberry, Thank you for the information and link.  Do you use a bellow thermostat in your Jeep?

I've read on this orgiial post that the modern thermostat will close completely if it goes bad but the bellow will continue to operate.  I think the 1/8" hole you drill in the bellows eliminates that problem.

The pellet type generally fails closed while the bellows type generally fails open. Pete DeBella has NOS bellows type available (might be 160 degree only).

http://www.debellajeepparts.com/CJ2cooling.htm

I have a 180 in mine as the higher temp is believed to help dissipate moisture in the engine better. Generally it'll run at 180 but on a long climb up a hill can go as high as 200, which isn't a problem. 160 was the standard when only alcohol type anti-freeze was available because it boiled at a lower temp. As permanent type (glycol) anti-freeze became available the thermo was bumped up to 180 as the boiling point rose.

Larry


Edited by rocketeer - 29 Aug. 2014 at 2:16pm

Yes, no problem. I have a 180 bellows but I bought it about 9 years ago and can't remember where, sorry.

Larry

Does it have a bleeder hole in it?

Larry

Larry, here is a picture of what I have.

Here's what the bypass hole looks like.

http://www.thecj2apage.com/forums/thermostats_topic4714.html



Larry

Larry, I wrote a post to you but must not have sent it.

The stat. on the left...is the hole at 5 o clock?

Is that the one with the larger size opening?

Charles

rocketeer wrote: otto wrote: My stock jeep runs around 160F with a 180 thermostat and it ran around 160F without the thermostat. I've never seen the engine get really warm.  If it shows 160 with a 180 thermo one of two things is wrong; either your gauge isn't right or the thermo isn't working right. Larry

dodjh-

Glad to help - I have been looking for a reasonably priced bellows - type and luckily found a used and functioning 180 F
example. With my experience driving in SoCal and their temps often above 100 F, I thought a 160F might be better.
My temps were a bit left of vertical mostly, but sometimes rose to the region to the right. If that happened, i turned on my heater and added the heater as a means of mitigating the heat. At that temp - what's an extra 10 degrees?
I recently found a used bellows - type and think it is a 180 F. Rocketeer- your comment about interior engine moisture gives me pause....

Now that I am back north in Edmonton, Canada temps rarely rise beyond 90 F so heat isn't a factor here. Rarely does the needle climb into the danger zone until you climb big, prolonged elevations or try and run at speed.

Edited by misterberry - 30 Aug. 2014 at 12:17am