When moving.Quote:
Originally Posted by mr brg
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When moving.Quote:
Originally Posted by mr brg
I replaced the water pump.
I replaced the head.
I replaced the upper radiator hose.
Twice.
The second time with an $60 silicon radiator hose from Moss Motors.
I replaced one of the heater hoses.
Nothing is leaking.
I replaced the thermostat.
I replaced the heat sensor on top of the thermostat.
Both fans are running.
I changed the wiring so that both fans are running at the same time all the time, bypassing the relay that turns one of the fans on when the thermostat hits a certain temperature.
Just now I drained the radiator again. Changed the antifreeze with the Prestone 50/50 mixture. Added one half bottle of Water Wetter.
Drove it around the neighborhood for about 20 minutes. It overheated again.
What's left?
Drain some out and add water. 50/50 not great for Texas.
Compression check to ensure that there isn't a head/headgasket problem. ( I see you replaced it, but that could still be the problem)Quote:
Originally Posted by Snowdoggie
Fans are blowing in the correct direction, right? How does the inside of the radiator look?
Highly unlikely, but I worked on a miata that overheated over 65 mph.
After chasing it like you did, turned out to be timing belt off one tooth.
Ran like a champ but progressively got hotter over 65.
My current Miata doesn't like dirty air. ::Drive2::
If I close it up behind slower traffic it warms up. (Not to overheating)
Move over to clean air, back to normal.
It hates semi's (sorry Paul) ;)
The radiator.Quote:
Originally Posted by Snowdoggie
http://www.miatamx5.com/coolantrerou...antrouting.jpg
make sure the t-state is opening all the way, you certainly have the tray behind the radiator, and maybe you want to try running it with just straight water to see if anything changes. 110* heat is hard on any car though.
I know that my NA tends to overheat when I have my Wabbit teeth in the grill (summertime)... it likes a lot of airflow.
And the heater core. The coolant goes from the back of the head where the temp sensors are through the heater core and out to the back of the water pump to go to the radiator.Quote:
Originally Posted by POS Racing
The temp sensors are on the back of the head next to the firewall and there are 2. One is for the temp gauge on the dash and the other is for the ECU to monitor engine coolant temps.
The thing you replaced on top of the thermostat is the switch to turn the fans on, it's not the temp sensor.
You can check if it's the heater core that's blocking the coolant flow by putting a U shaped hose in place of the 2 that go to the firewall. That will effectively bypass the heater core.
these is some debate over that because the heater returns hot water back to the mixing manifold, then into the motor. Some turbo cars run cooler with a valve in the heater return, if they have not changed water routing.Quote:
Originally Posted by channelmaniac
Mazda really screwed us with crappy cooling on these cars:
tiny mouth / heat exchanger opening
water goes out the wrong side of the head
hot water from the heater recirculates with cold water
radiator could be bigger
Would it be worth it to get one of those $500 aluminum radiators?
no, the car should cool with the stock radiator. Check everything else first...if everything checks out, then replace the radiator with something better than stock. Hit up Gary for a koyo.Quote:
Originally Posted by Snowdoggie
How about a new $150 OEM radiator?Quote:
Originally Posted by Snowdoggie
+1. Unless you spend a lot of time on the track in mid-summer, a $150 OEM replacement radiator will do you just fine.Quote:
Originally Posted by sammm
Slightly more than $150:
http://www.miataturbo.net/forum/showthread.php?t=24517
http://www.turbochargers.com/gallery...90_1.sized.jpg
"To do this group buy, I need 5 people. MSRP on the radiator is $320. MAP (Minimum Advertised Pricing) is $240. If I can get 5 people to commit, I can offer the radiators at an additional 10% off, making the price $216.
Additionally, if I can get 10 people, I will do free ground shipping for everyone."
Chris