Quote
Already replaced fan clutch, flushed radiator, replaced water pump, pulled thermostat, replaced radiator cap. Keep overheating in hot weather, up hills, stop and go traffic and at high speeds. Now what?

thanks in advance!


I had heating problems w/ a cheapo CSF 2-row core radiator (new) in my '86 runner w/ 22re. I think it was the design. I didn't overheat, but the temp gauge would go above the middle on flat roads w/ temps at 90F and no AC. Now, I live in Tucson and can easily drive stop & go w/ the AC running in mid-summer, and the temp gauge stays BELOW center all the time. The difference?

(1) Modine 3-row core radiator
(2) Toyota 82C thermostat (P/N 90916-03083)--it doesn't pull up on the parts computer if you just specify the year and engine (at least it didn't at my local dealer). You need to tell them the exact P/N, or they'll just sell you the standard 85C or 88C thermo.
(3) Toyota red coolant mixed 50-50 w/ distilled water

Probably (1) and (2) are the main factors. The 3-row core radiator has about 1/2 gallon greater capacity....well worth the money.

'86 4Runner: ARB winchbar, Kaymar, e-codes, OME lift, RR diff lock, FR truetrac, sound stream a/d/s audio, recaros.
'03 LX470: ARB sahara bar, Kaymar, HID's, ART cryo'd/slotted rotors, Stoptech SS hoses.
'01 Prelude SH
'00 CRV