Engine temp problem? Or not?
Some history.
ZZ430 motor, 180 stock stat (restrictive), no spring in bottom hose, Walker 4 core radiator (newly freshened up), electric 16" Spal 2370 cfm fan (new & much more power). Comes on at 180, off at 160.
Car always ran at 190
Changed all the stuff because I want to be ready for summer & driving.
Changed upper & lower hose (with spring this time) & removed the 10 yr old thermostat & installed a new high flow thermostat. I was surprised to see a 180 stat in there w/ car running 190, even on a cold day- I would have sworn it was a 195 in there, based on temps.
Normally if I started the car in garage & let it come to temp, it would sit in the 185/190 range, fan would come on & not shut off. Temp was A-ok.
Now I fire up the car & let it come up to temp. Comes up to about 175-180 & stays, fan comes on, temp drops to 160, fan back off. Does this repeatedly. On-Off-On-Off. Drops fast when fan comes on. I have no idea of brand or CFM of old fan.
I drive the car. Temp swinging between 180 & 165 on side roads. On freeway, hits just below 180 & stays, fan is off due to speed of car.
I thought thermostat might be bad so I swapped it out for another new one- a different brand this time. 1st one was Stant, second was Mr. Gasket.
Same exact thing. Both are high flow & opening area is huge compared to the stock one.
Both new & stock were 180 degree stats.
Problem or am I worrying about nothing?
BTW- It's only in the 70's here now.
On freeway at speed- temp is 180- right at thermostat temperature. Around town- lower.
Too much fan? Too much radiator? Too much thermostat flow?
Or should I shut up & drive? ;)
