PART 7: CAN'T STAND THE HEAT? GET OUT OF THE KITCHEN
A Bit of Cooling Maintenance

Next up, the cooling system. Replacing the oil lines required removal of the radiator so it was a good time to flush and drain the cooling system. I also replaced the thermostat and installed new radiator hoses that the previous owner gave me (he never got around to installing them) Of course in the process of replacing the questionable tstat (temp gauge wouldnít even lift of the C mark) I snapped not one but both filler neck bolts. AAAARGH!. Oh well. Drill, tap, and with new bolts all is well.

Not one but both coolant filler neck bolts snap! Drilling out old bolts.

Coolant filler neck bolt holes rethreaded and new OE thermostat installed.

In the interest of simplicity I also removed the automatic warmup system and associated throttle body cooling loop. Car requires a little right foot on the throttle immediately after startup in cold weather but itís not a big issue to remove the AWS. Before reinstalling the radiator I also ditched the OE mechanical clutch fan. The clutch fan was replaced with an electric fan. This also lessens parasitic drag on the engine and cleaned up the engine bay even more. Because Iím cheap I used an electric fan from a 1990 V6 Pontiac Fiero. This fan that comes with a nice shroud fits the Mazda radiator very well. I picked one up for $20 at the local junkyard. After fabricating some efan mounting brackets the radiator/efan assembly was reinstalled and a fan relay/temperature controller was installed. The relay/controller was $30 off eBay. Concerns about the added electrical load from the efan being too much for an early S4 alternator were questionable, but I was willing to see if the puny S4 alternator could manage with the fan running, the headlights on, the wipers on, and all my aftermarket gauges on. Time will tell.

Fiero electric fan and shroud. Homebrew fan mounting brackets.

The completed fan install. Gone is the big OE mechanical clutch fan and shroud.

The mounted fan controller/relay and sheathed wiring to the temperature probe.

Hooptie to Hotrod: Part 1
Scrap Metal: Part 2
Cosmetic Fluff: Part 3
Brake Gravy: Part 4
Exhaust Work: Part 5
Dieting and Some Oil Cleanup: Part 6
Underhood Miscellaneous: Part 8
Interior Gauges Plus: Part 9
Own a Lincoln? Suspension Upgrades: Part 10
New Shoes: Part 11
What's Next: Part 12
A Twist: Part 13
Sweatin' to the Oldies: Part 14
More Suspension Work: Part 15
Some Heart and Soul: Part 16
Chapter II: To Jump to the Next Series of Installments: Begins with Part 17 - A Good Rear End


BACK TO THE MAIN PAGES AND THE 3RD GENERATION RX-7 STUFF

7-UP CLUB MAIN
OUR "LOCAL7" COMMUNITY | THE WORLD OF THE RX-7



If you would like to contact me and converse about my experiences with my RX-7's:
please feel free to send an e-mail to crispyrx7@yahoo.com

This page last updated December 11, 2003


Disclaimer: All images contained on this page are the sole property of C. Regan.