Technical Tips > Pre 84

Over-heating problems 1970 vette

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77CVT:
Pretty much a C3's need a shroud!  There is nothing wrong with electric fans, it's just C3's suffer from poor stationary airflow.

They'll even overheat with the normal fan if there is no shroud!!

Cameron 77C3:
Has the beast been converted to right hook?  If so did they move the motor over so as to fit the steering box.  If so you will find that the original fan shroud will not allow the fitting of the standard clutch fan.  This is because with the motor moved over the fan is no longer in line with the shroud.

In this instance the shot is to either:-

'A' get the shroud modified to align with the fan, i.e. an after market fibreglass shroud,

OR 'B' a suitable smaller fan that will fit while maintaining correct air flow.
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69VETTE:
Hmmm.. thats a good point Cam,

However, if you look at Jolinari car, it sits pretty perfect with the conversion and all.

A shroud would definately help if its still running the original clutch fan.. maybe thats crapped out and need replacement?

Also check the thermostat and also the radiator cap?  They could be faulty.


M;36

Cameron 77C3:
Some conversions are done without moving the motor.  It all depends on who did the conversion.  There were quite a few I believe back then.

77CVT:
Most don't bother to move the motor.... but you knever know!

I had a C3 once that would overheat if it had a thermostat in it.  You would be surprised how much all the built up rust etc can contribute to higher temps.  When I rebuilt my C4 I had the block dipped and it now runs 10 deg C lower.

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