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Old 08-02-2010, 06:18 AM   #1
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T-stat Malfunction???

If a 195 thermostat malfunctions and doesn't open until 215 degrees as opposed to 195, would that suggest that the coolant would remain in the 215 range continuously during engine operation?

I believe that if the coolant must reach 215 before the stat opens, then, yes, the coolant would remain in that higher range during operation.

Has anyone seen a t-stat malfunction where as opposed to staying closed completely or opened as in the case of a Fail-Safe, the stat no longer operates at it's designed temp. but malfunctions to open at a higher than designated temp?

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Old 08-02-2010, 06:43 AM   #2
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so what temp are you running at? 210-215 is normal.

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Old 08-02-2010, 06:53 AM   #3
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Never heard of that happening, doesn't seem likely by nature of design of the thermostat
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Old 08-02-2010, 10:21 AM   #4
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You really don't need to start another thread for the same question you have already brought up in the previous thread.

Do some research (internet search) on how a thermostat works. They are very simple and are fairly consistant at working at the design setpoint.
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Old 08-02-2010, 10:31 AM   #5
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This thread needs to be killed, this is just beating on a dead horse as the first thread on this subject ended up doing.
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Old 08-03-2010, 05:59 AM   #6
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Nothing more to add

then just skip over the thread. I'm seriously trying to get input on how to repair my cooling system.

For a moment there I thought you were being constructive!
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Old 08-03-2010, 08:05 AM   #7
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We are bing constructive. 215 IS NOT OUTSIDE THE NORMAL OPERATIONAL RANGE.

- How are you determining a 215 deg temp. (and 225 in the previous thread)? The stock gauge is not finely calibrated to assess an exact temp.

- I have a Scan Gauge which can read the water temp from the PCM. The temperature readings normally range from approx. 206 -219. The ambient conditions (summer) will make it run hotter. Sitting in traffic and a hot day, it is going to run hotter. Having the AC on is also going to make it run hotter.
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Old 08-03-2010, 11:37 AM   #8
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Quote:
Originally Posted by mcoh1030 View Post
If a 195 thermostat malfunctions and doesn't open until 215 degrees as opposed to 195, would that suggest that the coolant would remain in the 215 range continuously during engine operation?Yes

I believe that if the coolant must reach 215 before the stat opens, then, yes, the coolant would remain in that higher range during operation.

Has anyone seen a t-stat malfunction where as opposed to staying closed completely or opened as in the case of a Fail-Safe, the stat no longer operates at it's designed temp. but malfunctions to open at a higher than designated temp?No
Does that help?

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