Overheating?

[SMsTATA]

New to this site, need help,

The TA overheats for about 10 seconds at a time, then goes back to normal driving temperature.

I have a new radiator, a new thermostat, and a new heavy-duty clutch fan.

Got advice to bypass the heater core, could this be the issue?

Any suggestions would be helpful.

 

[Knightrider189]

What temp is “overheat” for 10 seconds, and how often does it do it?


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[SMsTATA]

I’ll be driving for about 5 minutes, and it'll be normal temperatures between 180 and 200, then shoot up to the 260 mark for a few seconds, then return to normal for another 5-10 minutes and repeat, usually at low speeds.

 

[Knightrider189]

Sounds to me like more of a gauge/ ground or sensor issue.


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[SMsTATA]

There is also a new temp sensor.

I have shut it off when the temp is up, and you can hear the water bubbling, so it’s definitely getting hot.

 

[Knightrider189]

A bad water pump could cause issues.


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[Pontiac Trans Am]

What year Trans Am?

Thank you,
PTA Staff

 

[SMsTATA]

What year Trans Am?

Thank you,
PTA Staff

1979.

 

[SMsTATA]

1979

Anniversary, 403.

 

[chuckitall]

Did you ever figure this one out?