ScottyP3821

iTrader: (2)

So I have been overheating it has been about 100 every day. I have put in a new water pump, thermostat, mishimoto radiator and fans and cap. Also I am running 90/10 water/anitfreeze ratio. What am I forgetting?

nitrodann

Put the undertray back on.

Dann

pdexta

iTrader: (17)

Are you losing coolant? Is it overheating when stopped or driving? Is your fan coming on?

ScottyP3821

iTrader: (2)

All fans are good and im not loosing any coolant. Runs at about 195-200F at a sitting still with ac on. Under boost or at speeds at 60-70 the car gets to 230F and will keep increasing if I were to let it. I ordered an undertray and and new temp sensor. If that dont fix it I am completely at a loss of what to do. I understand a coolant re route helps but I am not even driving the car hard and it overheats.

BTMiata

iTrader: (5)

have you bled all of the air out of the system?

fooger03

iTrader: (2)

If you just "ordered an undertray", am I correct to assume that you don't yet understand the concept of "ducting"?

nitrodann

OP, you realise that with no further info except that you dont know why it overheats and that it does infact overheat, I was able to deduct that you were infact missing the undertray, immediately, with no hesitation and full confidence.

If someone can do that, whats the chances that they are right?

Dann

Savington

iTrader: (31)

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ScottyP3821

iTrader: (2)

Yes I bled all the air

ScottyP3821

iTrader: (2)

I understand I just didn't realize how crucial it was on a street used miata. Sometimes it over heats just going 40mph or les. Didnt think ducting would be so crucial as to lower 230f temps at such low speeds.

FRT_Fun

iTrader: (19)

You may have other issues. But it's a given that you need to use the under panel.

ScottyP3821

iTrader: (2)

I don't understand what other issues I could have I figure underpanel and I ordered a new temp sensor. Replaced everything else.

FRT_Fun

iTrader: (19)

Air in system?

nm see you said you bled the system.

I'm willing to bet the panel fixes it. You would be surprised how much of an impact it has.

olderguy

iTrader: (19)

Make sure your fans are rotating in the correct direction and get more water into the mix.

shuiend

iTrader: (24)

How did you burp the coolant? I would suggest going on amazon and getting one of the magic funnels to use for burping.

ScottyP3821

iTrader: (2)

I followed the same procedure similar to that of the mishimoto YouTube instruction video for installing the radiator.

ScottyP3821

iTrader: (2)

Fans are good. Is it safe to run less than 10% antifreeze. Oh also I forgot to mention that I tried wetter water and it didn't really do much. I did wetter water and water mix.

ScottyP3821

iTrader: (2)

I started thinking would the panel also help at idle as well? Maybe act similar to sucking through a straw? Increase air velocity by allowing the fans to pull air better?

FRT_Fun

iTrader: (19)

How are your fans mounted to the radiator?

Savington

iTrader: (31)

I would suggest putting the undertray back on, since it's the only suggestion in this thread that's going to actually fix your problem.