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December 14th, 2004
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#1 | | Member
Join Date: Jan 2002 Location: Bartow, Florida
Posts: 46
| overheating
My temperature reading seems to be spiking and returning to normal. When I start off it is OK, but within a couple of minutes it goes to 230F. I Know it cannot get that hot in a couple of minutes. After about 5 minutes it goes down to 222F for a few minutes and a few minutes later to, 163F. It is an 88 Reatta with 90,000 miles. What's going on?  | 
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December 14th, 2004
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#2 | | Senior Member
Join Date: Jan 2000 Location: Bonaire, Ga. 31005
Posts: 2,433
| Re: overheating
IMHO-Thermostat!
Sounds like stuck shut then some how opens, then sticks open.
__________________ Reatta Brakes, Teves, except 1991, are excellent but somewhat complicated.
At site below there are Tests that will identify most any problem you have! Test results? HTTP://www.reatta.net
BCA # 40529 | 
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December 14th, 2004
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#3 | | Senior Member
Join Date: Feb 2000 Location: perryman,md,usa
Posts: 1,469
| Re: overheating
I agree with Wally. Also check coolant level. | |
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December 14th, 2004
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#4 | | Member
Join Date: Jan 2002 Location: Bartow, Florida
Posts: 46
| Re: overheating
That was my first diagnose, so I took out the thermostat, and that was a week ago. Even though the Thermostat is now out of the system, I still have the same problem. The coolant level is OK. My next guess was the temperature sensor but I Can't locate it on the vehicle. Is there one, and if so, where did thay place it? | |
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December 14th, 2004
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#5 | | Senior Member
Join Date: Jan 2000 Location: Bonaire, Ga. 31005
Posts: 2,433
| Re: overheating
Collasped hose? Something impedes cooling/circulation until?
You must state sitting still or at what speeds?
In Fl. w/o a thermostat 163 seems reasonable, maybe high.
Probably get more help if you start, leave parked, report temps?
__________________ Reatta Brakes, Teves, except 1991, are excellent but somewhat complicated.
At site below there are Tests that will identify most any problem you have! Test results? HTTP://www.reatta.net
BCA # 40529 | |
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December 14th, 2004
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#6 | | Many Carpets
Join Date: Jun 2001 Location: Orlando, Florida
Posts: 8,024
| Re: overheating
If you are seeing 230F within five minutes with the thermostat out in the current cool weather then something is definately wrong. 163F when driving sounds warmer than I would expect but possible during the day.
Firt thing is to start the engine cold with the radiator cap off and watch the flow - should be very visible with the cap off. Next watch for the spike and see if the water temp matches. If not it may be the temperature sensor which is located under the throttle body and is rather inconvenient to get to beneath and behind the IAC. Best check when cold but might just be dirty/oily wiring.
__________________
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December 17th, 2004
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#7 | | Member
Join Date: Jan 2002 Location: Bartow, Florida
Posts: 46
| Re: overheating
After replacing the coolant sensor, the problem remains. I'm still driving the vehicle everyday because I need to get around. What else could I try to get it running right? | |
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December 17th, 2004
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#8 | | Senior Member
Join Date: Sep 2001 Location: A.K.A. Easily Distracted by Shiny Objects and Drive it Like I Stole It. My home garage is in Ottawa, Ontario, CANADA
Posts: 3,335
| Re: overheating
I don't understand it but I have read it several times now...A car will run Hotter with a thermostat out!
I have switched to Napa 180 degree Napa "superstat". It boasts 1. Patented Weir valve, 2. Thicker flange, 3. Larger piston, 4. Heavier spring, 5. larger heat motor. 6. Higher price
Due to the [@!#!$] [@!#!$] [@!#!$] [@!#!$] who designed the one hold down bolt I find that they do not properly seal the coolant flow. To fix this I cut a 4" length of black tape in half width wise and wrap the two pieces around the perimeter of the thermostat. Trim it slightly. It then becomes almost a press fit and the seal is made. I would love to give that pencil neck penny pinching [@!#!$] [@!#!$] accountant/engineer the task of replacing thermostats on all 3800 engines for the rest of his life. | |
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December 17th, 2004
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#9 | | Senior Member
Join Date: Jan 2000 Location: Bonaire, Ga. 31005
Posts: 2,433
| Re: overheating
In this thread:
Check for coolant flow
Blocked/crimped hose
Any chance there is a drop of fluid , on floor, under water pump?
Usually, if anti-freeze installed, you can smell leak. (WP is failing)
Remove the thermostat and drive, change? but I would just replace w/ a new 180* After replacing the coolant sensor, the problem remains. I'm still driving the vehicle everyday because I need to get around. What else could I try to get it running right?
__________________ Reatta Brakes, Teves, except 1991, are excellent but somewhat complicated.
At site below there are Tests that will identify most any problem you have! Test results? HTTP://www.reatta.net
BCA # 40529 | |
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December 17th, 2004
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#10 | | Senior Member
Join Date: Jun 2000 Location: Prince Edward Island, Canada
Posts: 2,049
| Re: overheating
but I would just replace w/ a new 180*
And remember, green side up! 
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Over 1/2 way to 1/2 a million miles
The only known 5-spd S/C Reatta on the Road.
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and Member BCA (The Bluewater Cruising Association)
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