92Z28 running a little too hot.
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Joined: Feb 2013
Posts: 75
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From: Minneapolis MN
Car: 92 Z28 convertible
Engine: 305 tpi
Transmission: Auto matic
Axle/Gears: 3.73
92Z28 running a little too hot.
I'm looking for some thoughts on my 92Z with 305 auto. It is running a little too hot. The fans are on a toggle switch and it is not using any coolant. On cool evenings it will go up to about 215-220 with both fans running. This is higher than it used to. Too hot to ever use the ac. Thoughts on where I should start? Thermostat? Water pump? I don't know where to begin.
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 92Z28 running a little too hot.
Sounds like normal operating temp. Stock the fan turns on at 226f .
Your gauge sender might be reading incorrectly.
Your gauge sender might be reading incorrectly.
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Junior Member
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Joined: Feb 2013
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From: Minneapolis MN
Car: 92 Z28 convertible
Engine: 305 tpi
Transmission: Auto matic
Axle/Gears: 3.73
Re: 92Z28 running a little too hot.
It seems to me that on a cool night just cruising at 60 mph that the car should be cooler than 220 or so with both fans on. I'd like to get back to where I could re charge and use my ac. How would my car act if I had a thermostat stuck closed? I'm just fishing for thoughts here.
Joined: May 2012
Posts: 300
Likes: 18
From: Laurel, MT
Car: 1984 Z28 HO
Engine: 305
Transmission: 700R4
Axle/Gears: 3.73
Re: 92Z28 running a little too hot.
Fans provide no cooling at 60 mph, air flow through the radiator does.
Is your front air dam in place and functional?
Under 45 and idling, does the fan operation lower the temp at all?
When is last time you flushed and replaced coolant?
Is your front air dam in place and functional?
Under 45 and idling, does the fan operation lower the temp at all?
When is last time you flushed and replaced coolant?
Thread Starter
Junior Member
iTrader: (1)
Joined: Feb 2013
Posts: 75
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From: Minneapolis MN
Car: 92 Z28 convertible
Engine: 305 tpi
Transmission: Auto matic
Axle/Gears: 3.73
Re: 92Z28 running a little too hot.
Air dam is in place as it should be. I don't when on the coolant. The previous owner did change the the radiator, water pump, and thermostat, I could only guess that the coolant would have been changed then. All of that was about 35,000 miles ago.
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From: Houson
Car: 86 Firebird
Engine: 305 SBC
Transmission: 700 R4 TCI
Axle/Gears: 3.42
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From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
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Hot Cruise Night
Originally Posted by pfsteichen
How would my car act if I had a thermostat stuck closed?
If your gage went that high you would see temps in the 300° bracket.
The engine would begin stalling and you would have to keep your right foot on the loud pedal to keep it running.
Use an IR thermometer to make sure your gage is accurate.
Does your radiator get hot or is it relatively cool?
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