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Offline ToniJ1960

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thermostat
« on: September 21, 2011, 06:33:17 PM »
 Well my Pinto is running pretty hot,and Im sure its the cause of the preignition I noticed recently.I have always used the same 89 octane BP gas for the last 5 or 6 months now. The only thing I did recently was replace a leaky power valve in the carb. So I was suspecting a lean mixture,but Im wondering,since it overheats in such a short time as it does ( even a 2 mile trip), if I may need a new thermostat. It sounds like it should be pretty easy to change.

 Maybe theres some tricky part to getting the gasket right,I should be aware of? I noticed there are gaskets that cost $1 and one that costs $6.99 maybe its uncalled for and the cheapo one is fine?

 What temp thermostat is good for the 2.3 with a 4 speed? I saw 160 degree,180,190,192,195 and 199. My guess would be 180.

 It probably is a good idea to replace it  either way,it hasnt been changed  since 1988.

Offline Starliner

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Re: thermostat
« Reply #1 on: September 21, 2011, 07:42:00 PM »
It depends on where you live.
 
If you expect to experience any weather below 40 degrees I would go with the 192 F degree thermostat.     The 192 F also works well in warm weather with a properly maintained cooling system. 
 
If you were always in Los Angeles, Vegas, or Florida then 180 F would be good. 
 
 
 
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Offline ToniJ1960

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Re: thermostat
« Reply #2 on: September 21, 2011, 07:52:46 PM »
 It definitely gets below 40 in St Louis during the winter :)

Offline ToniJ1960

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Re: thermostat
« Reply #3 on: September 21, 2011, 09:24:32 PM »
 So would it hurt to just leave the thermostat gasket alone as long as its sealing ? And not risk starting a leak trying to change it?

 How likely is a thermostat to stick in the closed position?

Offline dave1987

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Re: thermostat
« Reply #4 on: September 21, 2011, 11:59:53 PM »
A sticking stat depends on how old it is, how it was installed, and sometimes the brand. Those are all from experience with t-stats.

I have to change mine out and usually one of the $1.00 gaskets work fine for me, namely Felpro brand ones.

I have to change mine out, as well as my water pump gasket, due to them leaking a bit and it's been few years since I changed my t-stat.

Also, I run a 192 in my 2.3l. I'm in Idaho and during the summer it can get a little over 100 degrees but recently it's been getting to mid 80s as high and below 40 at night (when I do most of my driving).
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Offline ToniJ1960

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Re: thermostat
« Reply #5 on: September 22, 2011, 12:02:23 AM »
 Its pretty similar weather here. I think tomorrow,before I drive anywhere,since its the only car I have to drive right now,I might just take the thermostat out and drive it that way as a test,and to go get the new parts.

Offline dave1987

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Re: thermostat
« Reply #6 on: September 22, 2011, 12:05:15 AM »
That should be fine, as long as it doesn't get TOO cold out, you want the motor to warm up to SOME.

I was going to pull mine but I might as well just change it all out while I'm in there since I need to change my coolant and t-stat anyway.
1978 Ford Pinto Sedan - Family owned since new

Remembering Jeff Fitcher with every drive in my 78 Sedan.

I am a Pinto Surgeon. Fixing problems and giving Pintos a chance to live again is more than a hobby, it's a passion!

Offline mrskydog

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Re: thermostat
« Reply #7 on: September 22, 2011, 08:39:17 PM »
I have read that the 2.3 motor like and runs better with the hotter  192 thermo... ?
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Offline ToniJ1960

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Re: thermostat
« Reply #8 on: September 23, 2011, 11:33:22 AM »
  Im not sure now that its the thermostat. It overheats in a short trip 2 or 3 miles. If I remove the radiator cap (theres no pressure in the top hose) I see steam coming up,but dont see any water moving or churning.Now if the thermostat was stuck closed, would I still see steam from the water in the radiator?

 Maybe its the water pump? The belts arent super tight but the fan is turning fine.And no charging issues.

Offline ToniJ1960

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Re: thermostat
« Reply #9 on: September 23, 2011, 02:48:34 PM »
 Ok I took the car in to be checked,they did a pressure test and now at least,its leaking from the radiator.I never had any fluid loss so I dont think it was leaking.And would it still overheat even if it still had plenty of fluid? It was steaming when I got home,but still full to the top.

 Ordered a new radiator,but I feel as if its still going to be right back where I was,and out there $40 plus a new radiator.