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Author
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Topic: Thermostat question
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wrest65
Journeyman Posts: 2
From:
Registered: Nov 2005
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posted 11-14-2005 08:59 PM
  
First Mustang...First question...(not much experience, but interested in learning)...
I just picked up a '65 Mustang, with what I believe to be a '70 302 (cammed) engine...Initially I ended up with a leak in the radiator which was replaced...Next, experienced alot of "water" pouring out of overflow hose and a "boiling/slushing" sound after turning the car off...Running without the thermostat everything seemed to work fine...After replacing the thermostat with the OEM 195 degree thermostat I experienced the same overflow and "boiling/slushing" problem...Once again, I removed the thermostat and everthing has been running fine since...Has anyone had a similar experience?...Can anyone suggest where to go from here?...Would a lower rated thermostat make a difference?...If not, what else might I look into?...I look forward to suggestions...Thanks!!!
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Scott H
Gearhead Posts: 1038
From: Chicago area
Registered: Mar 2005
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posted 11-14-2005 10:15 PM
Welcome to M&M! All questions are welcome, remember that someone else can also learn from your experience.A thermostat should be installed to slow down the coolant rushing thru the engine. If it goes thru too fast it doesn't have time to pick up the heat and carry it off to the radiator. My suggestion would be to review your thermostat installation. If you install it backwards, it won't open and would cause the symptoms you describe. Also check the radiator cap. Most auto parts stores should be able to test it for you. It should be able to hold 13 pounds of pressure.
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lcl
Gearhead Posts: 109
From: new waterford oh
Registered: Mar 2005
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posted 11-15-2005 03:20 AM
Welcome to M&M. I'm new to this also, and believe Scott when he says others can learn from your experience. I've learned a ton by just reading older posts and I've come across questions that I have myself and have found them to be answered. Re-check your installation, when I replaced mine the older one that was in there had not been properly seated (it had slid down).
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66 fastback
Gearhead Posts: 170
From: Califon, NJ 07830
Registered: Oct 2003
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posted 11-15-2005 07:40 AM
Welcome, I experienced the same problems when I first put my car back on the road. I have since corrected this problem by doing these two things.I drilled a small (1/8) hole thru the flange of the thermostat and as I installed it, I made sure this hole was at the 12 o'clock position. This way any trapped air would be able to escape. The second thing I did was to loosen the temp sender with the motor running and the radiator cap off. I used the sender as a bleeder screw to let any trapped air escape. The level of coolant in the radiator dropped and I had to add more to fill it back up. Eventually coolant began to appear around the threads of the sender, I snugged it back in place and the problems you described ended.
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Dreamcometrue
Gearhead Posts: 691
From: New-Brunswick,Canada
Registered: Apr 2004
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posted 11-15-2005 08:12 AM
Welcome to M&M
Rino 
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buening
Gearhead Posts: 247
From: Decatur, IL
Registered: Mar 2005
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posted 11-15-2005 08:29 AM
I suspect you installed it backwards. What did your temperature gauge read when you heard the boiling/sloshing?------------------
1970 Grabber Blue Mach 1 H-code
1970 Fastback
2003 Torch Red Mustang
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minnesotamustanger
Journeyman Posts: 19
From: Hutchinson, Minnesota
Registered: Apr 2005
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posted 11-15-2005 09:41 AM
Along with the other good ideas, I would put a 160 or 170 stat in there. There is really no reason to have a 195 stat unless you are looking for heat out of the heater system. If I recall, the original from the factory was about a 180.Mike
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V8 Thumper
Gearhead Posts: 4692
From: Phoenix, Arizona
Registered: Dec 2001
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posted 11-15-2005 10:08 AM
Ditto that... carbed motors don't need near that much (195*) heat. Higher operating temps are required for late model computer controlled emissions systems.------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" 12.58/110 on street tires, more to come;) All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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Jake11
Gearhead Posts: 207
From: Banning,Ca,USA
Registered: Oct 2005
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posted 11-15-2005 11:46 PM
Have you flushed out the block real good?
If not, the radiator is probably plugged.
The thermostat can come out for testing.
It's in there so your heater works. Leave
it out and the engine runs too cold. Take
the thermostat out and run it and see what happens. If it still heats up, shut it off
and feel the radiator with your hand. Is it
hot the same all over?
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