The issue is that the water temp starts to climb as soon as I ride the car. The temp stays "normal" while the car is at idle, but as soon as I take it for a "cruise" the temp starts to climb. While the engine is on, without the cap on, there are no visible bubbles, the engine is not loosing coolant, and starts fine when is cold.



The water pump is new, the radiator is new, and so is the radiator cap. The engine is a ported 13BT on stock turbo, 3 inch full exhaust.



I am cluless, any help is greatly appreciated!



THANKS!

check to see if the fans are wired, or if the clutch fan is ok, and if u have a standlaone make sure that they turn on at teh right temp or turn on at all, and check your ignition timing

Do you have a *Mazda* thermostat?

bleed the air out?

It's an electric fan that was working fine before the engine swap, and is wired to 12V acc; and the ignition has been set and check over and over. The issue has been constant with the stock ECU and with an E6K :(

Yes, as new as the water pump, radiator cap and radiator; all OEM except for the KOYO radiator.

Yup :(

What's the temp reading on an aftermarket gauge?

Try checking the oil cooler thermal bypass... its not really known for failing, but if it stuck shut, all of the oil would bypass the oil cooler. As a significant portion of these engines are oil-cooled, a failure of this form of cooling would put greater stress on the water cooling system, and the engine would overheat.

If you don't have an aftermarket temp gauge, get one... even a cheapo will do for now. While you're at it, pick up a cheapo oil temp gauge.



Do you have the lower and upper plastic shrouds in place?

Do you have a FMIC? If so, what brand?

If the overheating occurs during driving an not idle, its not the fan....



Get back to me.

At idle on on on the autometer gauge, it reads 182F and so does the haltech. As soon as I take it for a spin, the temp will start to raise, right in between 180 - 210 marks on the autometer, the haltech confirms it with a 200F. Now by a "spin" I mean 2 blocks away from my place :(



The weird part is that at idle the temp will stay rock solid at 180F, and once it reaches 200F it will go back down to 180F. At +200F there are no coolant overflow, and if parked at idle it will come back down to 180F

https://www.nopistons.com/forums/pub...1047683561.gif



Is there any way of keeping the oil cooler thermal bypass, stuck open?



Lower and upper plastic shrouds are in place, and I'm still using the stock FC intercooler on the stock location.



Thanks for the help, much appreciated!



BTW - It just hit me, I am not running the air pump, and the alternator still have one belt. I was told that it is not a belt slipping, since there is not "belt slipery nosie"

I know its a dumb question, but is the fan pulling the right way?