RX7Club.com - Mazda RX7 Forum - Radiator cap funnel, eliminate air bubbles

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Quote:

Originally Posted by TomU (Post 12429246)

Heat is the Achilles heal of these cars. Think it's detailed well in the Big Fat Cooling Thread. Koyo radiator, R-1 passenger oil cooler (if you can get one), downpipe and you should be GTG. More radical steps include relocating the battery, V-mount and ditching the A/C (condenser sits in front of the radiator)

Thankfully I had a great local Rotary specialist mechanic go through my FD almost 20 years back and did a large swath of reliability mods, including the installation of a Koyo radiator and a downpipe. At least I'm already covered there. :)

Just a quick update, after changing the fill cap and the AST pressurized cap (0.9 bar) and burping all the air out of my coolant system, it looks like everything is good now. I took the car for a long drive on a hot summer day and my aftermarket coolant temp gauge showed only normal expected operation as described in the big coolant thread.

FWIW, Pettit is selling a redesigned AST now . It looks just like the RX7.com unit but the price is higher.