Chevy Mechanic with C4 Corvette Experience.

[BullseyeBoomer]

Experienced Chevy mechanic needed.

I have an '89 Corvette with engine cooling issues. Overheats in traffic, don't hear fans coming on, even when turning on A/C. Observed coolant temp 230+ degrees.

New 2-row aluminum radiator needs installed, parts provided.

A/C is low, needs charged and checked for leaks, 1lb freon provided.

Located in Rossville/Chickamauga area.

Please PM if interested in tackling this job.

 

[K79540]

That temp and aluminum heads equals not good...have you checked the relay for the fans?...maybe as simple as that...wondering why you're swapping the radiator..did you find a leak?

 

[BullseyeBoomer]

That temp and aluminum heads equals not good...have you checked the relay for the fans?...maybe as simple as that...wondering why you're swapping the radiator..did you find a leak?

Has original single row radiator. Better cooling with 2-row, according to my research. No coolant leaks as far as I know. And yes, I read you can jumper the A & B ports on diag. plug to see if fans come on, haven't done that. I've heard that low freon will prevent cooling fan switch from cycling. I don't have any A/C gauges, so I need it checked.

 

[BillsCamino]

Dual fans ??
If so, one fan cools engine as needed...2nd fan will kick on every time the A/C is selected

Does the A/C compressor run ? Clutch engaged ?

Those C4 engines were known to run hot...

 

[BullseyeBoomer]

A/C compressor runs, clutch engages, some cool air from vents. No fan comes on when A/C turned on. Previous owner said he had to add R-12 freon annually. Maybe it's time to convert to R-134...

I'd also be interested in installing temp sensors that turn on cooling fans at lower engine temps.

 

[Carlos .45]

Had a '94 that ran hot, bad thermostat, easy change out.

 

[Lockout]

Hot wire fan first to make sure you don’t have any other issues

air pockets will cause incorrect reading of coolant temp and not cut fan on because there isn’t any coolant flowing to sensor
If you have air pockets check see blown head or crack block with combustion tester the blue stuff lol

hot wire first be my step

mid it cools engine and no other issues then trace positive wire from fan all the way to relay and confirm power
If has power but no ground follow it until you find issues

quick switch of a relay that works might be quick with a known good relay

FYI

 

[Lockout]

Had a '94 that ran hot, bad thermostat, easy change out.

Could be but fans should still come on as it will be over heating at that time

need fix fans first

thermostat bad will still over heat while driving
His symptoms was driving air flow doesn’t over heat
So sounds like a air flow issues to me

 

[Lockout]

On a dual fan one fans for engine other ac

Single fans has a dual speed motor to turn to high speed when over heating or ac head pressure is high

 

[Rabbit2047]

I got experience with C4.... But I don't see how an explosion is gonna help your situation