My Radiator and Fans Replacement.........

And then I also acquired a pair of "optional factory 8-blade" fans/cowlings/motors/mounts, with 1 motor needing replacement with destroyed end bearings.
Has anyone here ever seen/heard of/had/been equipped with/used these orange 8s?

The inside bore of the (unobtainable) fan hub was mauled and over size and spinning on the motor shaft, (probably the cause of the other motor's failure) and that made it necessary to drill/tap/double set screw the hub to the new motor's shaft, using the nylock nut to just set the hub level and centered on the shaft.

The cavity was laboriously and completely refurbished/repainted/readied for the install........

And only slight trimming of the side air deflectors was necessary to accommodate the additional core depth of the new radiator during the easy install.

All hoses are extra length and quadruple clamped, and both tubes were cleaned and repainted.
The refill went as expected (4 gallons came out) and since the nose was up anyway, I put 3 gallons of mix in until the upper petcock indicated full, then drop/run/open thermostat/shut off/cool off/add a quart/repeat until it was happy/full/cool.

Really apparent here is the added depth of the radiator core, as well as the deeper fan cowlings for those orange 8-blades.

The fans are quieter, faster, and pump much more air than the stock units, here unsuccessfully hiding behind the newly refurbished/repainted front grille and valance.

It's a shame to have to cover up those new parts, although I did spend a lot of time getting the repaint/patina just right on the upper air deflector.

A much cooler running yellow/black cat is now back to continue prowling the "Valley of the Moon"

Nice work, looks great! And hopefully no cooling issues. Do you know if those temp sensors are set at the same temps as the originals?

Piney:"Do you know if those temp sensors are set at the same temps as the originals?"
Hall now sends 2 75/70c sensors with their radiators and my next task is to revert my wiring back to the stock sensor/relay usage instead of the over riding/overheating/frequently failing/on/off fan switch on the dash.

Thanks!

quote:

Originally posted by PanTTera:....revert my wiring back to the stock sensor/relay usage...

Thanks for the photos and the narrative of your work.

Do you plan to use both thermal switches, that is the upper tank location controlling one fan and the lower tank location controlling the other (like the stock wiring)?

while you are rewiring, have you considered using an "Aux Run" relay to reduce the current through the ignition swtich?

Looks great!!

That looks really great!

You did a terrific job!

Rocky

PS. I would suspect that using two thermal switches with the same setpoint would in effect switch the two fans on at different times.

The input side would switch the first fan on at 70 Deg C, and then when the system gets hotter, the output side would kick on the second fan as the OUTPUT coolant temp gets to 70 Deg C.

quote:

Has anyone here ever seen/heard of/had/been equipped with/used these orange 8s?

my #6174 came with those 8 blade Fans from new. That was also one of the clues that let me to start an Investigation if it was a factory built GR.3 car ;-) I don't have any photos on file though and the Fans and Motors are in a box somewhere in my storage now. They were in a bad condition and I replaced them with more modern Fans. Perhaps one day I will (inspired by you) bring them back to life.

Great Job

Your new radiator and fans seem to work better than the old setup for sure.

Your car is SO clean in front there, you must have spent some time cleaning things up prior to the radiator/fan R&R.

Nice job. I also had the same fans when I first bought my car. Although I seem to recall mine were yellow not orange. They may have been an early batch.

Good installation Ron, I really appreciate the time spent adding pics & text. Thank you.

quote:

Originally posted by PanTTera:

... my next task is to revert my wiring back to the stock sensor/relay usage ...

The Pantera uses two fans simply because of the shape of the radiator, its wider than it is tall. If the radiator were square in shape the Pantera would use just one large fan. If you look at the situation that way, there's no reason to turn the two fans on at different settings (in stages). It was common in the Euro auto industry back in the days of simpler controls (i.e. when the Pantera was new) to turn dual radiator fans on & off simultaneously. Its easy enough to rewire the relay controls so that one temp switch mounted in the inlet tank controls both fans (relays). The icing on the cake is utilizing a M22 switch with settings complementing the settings of the thermostat in your car. The fan shall actually turn-off during cruising at highway speed, and turn back on during stop & go driving! Straight forward, simple engineering that works like a "normal" car, like it should have 45 years ago.