How To Install: Mishimoto 1990-1997 Mazda Miata Performance Radiator & Fan Shroud

Radiator: mishimo.to/1VOHABk
Fan Shroud: mishimo.to/1T9P4bz
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Check out top drifter Matt Waldin install a new all aluminum Mishimoto radiator into this 1990 Mazda Miata.
Model Number:
MMRAD-MIA-90
MMFS-MIA-90
INSTALLATION INSTRUCTIONS
Downloadable Install Instructions: lib.store.yahoo.net/lib/yhst-6...
PARTS LIST
(1) MISHIMOTO RADIATOR
(1) MISHIMOTO RADIATOR CAP
(1) MISHIMOTO MAGNETIC DRAIN PLUG
TOOLS NEEDED
RATCHET 12MM SOCKET
10MM SOCKET
COOLANT
COOLANT FUNNEL
COOLANT DRAIN PAN
PHILLIPS SCREWDRIVER
FLATHEAD SCREWDRIVER
BUTT CONNECTORS
JACK + JACK STANDS
ELECTRICAL TAPE
PLIERS
Disclaimer
• Please dispose of any liquids properly.
• Allow vehicle to cool completely prior to attempting installation.
• Mishimoto Performance (MP) is not responsible for any vehicle
damage or personal injury due to installation errors, misuse,
or removal of MP products.
• MP always suggests that a trained professional install all
MP products.
• Do not run the engine or drive the vehicle while overheating.
Serious damage may occur.
• Raise vehicle only on jack stands or on a vehicle lift.
(1) REMOVING THE OEM RADIATOR FAN SHROUD
1. Using a jack, securely support the vehicle on jack stands or use a vehicle lift. Disconnect the negative terminal from the battery. (Located in the trunk).
2. Using your Phillips screwdriver, remove the coolant drain plug located in the center of the vehicle, below the radiator. Drain all cool;ant from the vehicle, using a drain pan to catch all used coolant. Removing the radiator cap will aid the draining process.
3. Disconnect and remove the upper radiator hose by unscrewing the two hose clamps securing it.
4. Unbolt and remove the splash shield under the vehicle to access the lower radiator hose. Using your pliers, loosen the two spring clamps securing the hose and remove the hose from the vehicle.
5. Using your ratchet, remove the two 10mm bolts securing the air conditioning line to the vehicle.
6. Remove coolant reservoir overflow line and set off to the side.
7. Remove the two 12mm upper radiator head bolts located on either side of the radiator.
8. Unplug both fan shroud wiring harnesses located on either side of the radiator next to the head bolts that you just removed.
9. You will now be able to lift the OEM radiator and fan assembly our of the engine bay.
(2) PREPPING THE MISHIMOTO RADIATOR & OEM FAN SHROUD FOR INSTALLATION
1. Remove the two lower OEM radiator support pegs using your flathead screwdriver to slide off the C-clips securing them. You will be reusing both pegs on the Mishimoto radiator.
2. Remove and transfer the upper OEM radiator mounts onto the Mishimoto radiator.
3. Place and secure the OEM fan shroud to the radiator using OEM shroud hardware.
(3) INSTALLATION OF MISHIMOTO RADIATOR
1. Place radiator into the vehicle, making sure to secure it on the radiator mounting peg holsters.
2. Reinstall upper radiator head bolts to secure Mishimoto radiator and OEM fan shroud into the vehicle and reattach the coolant reservoir line.
3. Reattach the lower radiator hose and air conditioning lines, and replace the splash shield under the vehicle.
4. Replace the upper radiator hose and securely tighten the hose clamps.
5. Reconnect the OEM fan shroud connections and tuck wires away from any moving parts in the engine bay.
(4) COOLANT REFILLING & INSTALL COMPLETION
1. It is now time to refill the vehicle with coolant. Screw the coolant drain plug back in if you have not done so already. Insert the funnel into the filler neck of the radiator and begin to pour 50/50 mix of coolant and distilled water. While filling, it is a good idea to pump the upper radiator hose to remove any last bit of air in the system.
2. Reconnect the negative terminal on the battery and stat the vehicle, making sure the vehicle is in neutral or park.
3. While the vehicle is running, turn the heat on high. Monitor the temperature gauge to make sure the vehicle does not overheat.
4. Using a jack, raise the vehicle, remove the jack stands, and lower the vehicle, or lower the vehicle on the lift you were using.

[@lucyflossy]

FYI on a 1990 the ground wire on the New Fan is the blue/yellow one and the red/white wire is the positive one. One the car black is negative and black/blue is positive. Fan came with two plugs on it but the passenger side was not the correct one. Had to use the original connector. Had to search high and low to find out which was which. Hope this helps someone else in the future.

[@Ryan-kg1fn]

You just saved me so much trouble. Thank you so much!

[@underengineered_1077]

Thank you. Saved me a bunch of time.

[@wolf72654]

I love you so much

[@garethhuggins293]

I did exactly as he said... I began draining my radiator and then was going to get some coolant while it was draining, only problem I needed my car to go get the coolant! Felt real smart after that...

[@jollyauto334]

This was super helpful! Thank you for taking the time to produce this and upload it! -Z

[@mishimoto]

Jolly Auto Glad you liked it! - Patrick M.

[@dexterchinn]

excellent video. when i replaced the radiator on my 1990 miata, i found 2 ports on the bottom when i determined were for cooling transmission fluid. this video must be for manual transmission, but still very helpful.

[@1darslars]

I Have these fans on my MX-5 and they definitely keeps thing cool ; )

[@keithko007]

Excellent Tutorial!

[@schoolboylue2060]

Damn didn't know it was that easy to take it out. Thank you jesus

[@RetroExhibitCollective]

Where do I get one of those reservoir clear tubes to the radiator?

[@drpiv]

Great video!

[@CharlieRamos13]

Great video

[@mishimoto]

That is a possibility. In order to properly purge the system of air, you need to turn your heater on, to cycle coolant through the heater core. Otherwise you may have air bubbles trapped in your system, which could cause overheating.

[@666govnor]

Great info, thanks!

[@nicoespulgar1740]

do the stock radiator fans have to be modified to fit this product?

[@ildefonsoconra02]

Does replacing the radiator really take all that time?

[@Alexowenscoot]

how much would the radiator and fans cost? thanks

[@PanditaP]

Yum, I want this in my life.

[@PaulSlavonik]

He mentioned it briefly towards the end but do you leave the radiator cap off when you start the car up to turn on the heat and don't put it on until you feel heat from the vents?

[@mishimoto]

Yes :)

[@klockworks17]

i think i need a new heater core my ac and heater didnt and still dont work since i bought the car. but i have both

[@mishimoto]

No, your stock fans will work with our radiator! :)

[@BullPlop11]

Does anyone know if this radiator and fan shroud fit with the Jackson racing cold air intake? Loved the video! Can't wait to get mine ordered and installed.

[@mishimoto]

+BullPlop11 please shoot us an email at [e-mail] - we're here to help! -Team Mishi

[@reenoud]

I got an mx5 also at home but tbh the standard radiator is more then enough for cooling... 30°C in the summer reving it all the way to 6000 rpm manny times uphill never gets to hot. Mx5's have a big radiator for the size engine it is.

[@derkman127]

the only time my temperature gauge raised, was when doing 200 kmph on the highway for half an hour

[@alvinross7243]

Hi, I was just curious if I could use my 1 stock fan on the radiator?

[@usagentcyclone]

yes i did it. read above for more info from me

[@klockworks17]

What if my heater doesn't work to begin with

[@whitelightning4031]

when installing the dual fan shroud on to a miata that only had one OEM fan, how does all the wiring connect up?

[@mishimoto]

oli sopher Sorry for the delay in response! If your car is indeed a non-A/C model then it is very unlikely that the wiring exists for the second fan. Some have simply tapped the wires from the primary fan and used them for both slim fans but this usually overloads the factory relay and causes issues. I would recommend setting up a dedicated second relay for the passenger side fan. This will require 12v power, 12v ignition signal, ground and a signal from the factory fan switch. Tapping from the factory switch to a new relay will ensure that both fans activate at the same time. The drivers side fan can pull the power and ground from that body harness, but I would not recommend using this harness to power both fans. Let us know if you have any further questions!

[@blitzwing1985]

I notice you didn't bolt the AC lines back on is it simply not needed or is this a missed step?

[@mishimoto]

Hello! We did not include that step in this particular video - thanks for pointing that out. The A/C lines will attach to the Mishimoto radiator as they do the factory unit.

[@blitzwing1985]

thanks I found that out as I was fitting the unit. great product but wow is space tight after putting everything back in.

[@mishimoto]

blitzwing1985 You're welcome! If you have anymore fitment questions, please don't hesitate to email us at sales@mishimoto(dot)com. Have a great day!

[@erat91]

SOLD!

[@Shefster01]

Thank you. :)

[@itsbread7787]

Would you have to tune the ECU because of change of flow or anything like that?

[@mishimoto]

No need, the thermostat will still regulate temperature as usual, this allows the system to handle more abuse overall.

[@idontgiveaquack4937]

you said 1:30-2hrs work. but you did it less than 12mins.

[@ditto2265]

Efficiency

[@HDxCasTpeR]

If they resprayed the whole car then why not the underside of the hood?

[@nicoespulgar1740]

alright thank!!

[@Duzzii_]

I replaced the coolant temp sensor and i got the x line performance rad and fan shrout . I changes the fuse as well and the driver fan or ac doesnt come one . I rewired it twice and nothing ? Did i not bleed the system properly? My temp thermostat works and cluster too. Any advice??

[@mishimoto]

+Damian Gumienny please email [e-mail] - they will be more than happy to answer any technical questions! :)

[@Duzzii_]

I actually had the fans tested on a 12v battery and they didnt click or spin , so i filled out the warrante application to send it in and get it repaired , however i replaced everyother component so i dont have to worry about it down the road . Thanks !

[@RoxusRemo]

Should you flush the whole system several times before changing the radiator and adding fresh coolant?

[@mishimoto]

This is not necessary unless you believe there are contaminants in the system.

[@RoxusRemo]

@@mishimoto I think the car was sat for a number of years with same fluid so probably should I guess!

[@mcFronta1ot]

If I buy a radiator, am I going to get it with a bunch of bent fins? That thing looks kind of dinged up..

[@mishimoto]

+Woofalot definitely not! Our rads our manufactured from the highest quality aluminum and backed by our Lifetime Warranty!

[@TastyPlacementSEO]

These wiring instructions don't work on the 99-05 kit. The fans have 4 wires each on my '04 MSM

[@Lakingsenjoyer]

+Michael David it clearly says 90-97 man! I'm sure theres one for an '04 somewhere tough!

[@samleary3958]

Can I install these fans on a stock rad?

[@mishimoto]

Hello Sam Leary . This particular fan shroud is designed to fit both your OEM radiator as well as a Mishimoto performance unit so you'd have no problems at all :)

[@gregorylee3990]

Can i reuse the stock fan shroud with this radiator?

[@beranihull6261]

Tight fit, but I managed to use original fans with my Mishimoto Rad

[@Tuneman-iy8og]

Just spent 6 hours trying to do just this on my NA 1.6. How. The. Hell did you do it sir?

[@trainwreckluv]

new rad and fans new hoses ran great on freeway but once I had to stop in traffic for 5 minutes it started to overheat I was told I should of put a after market water temp gauge kit in at the same time as new Rad. I didn't see that done here so whats up? is this true or just another money making idea from mechanic. He said the fans that came with the new radiator were to small and need this other device....

[@mishimoto]

+Terry D. Sounds like something else may be going on. Can you please email [e-mail] so that our customer service team can look into this for you?

[@blykoger]

Can i just use stock radiator fans?

[@Coda5610]

Yes

[@usagentcyclone]

it was a tight fit for me today, and only one of the ac lines bolted back in to the new radiator. i also had to remove some intake pipe to fit it in. i also removed the upper mount rubber because the extra thickness of the new rad and stock fans meant it flexed too much so i just bolted it straight into the mount

[@connerhurshman7110]

Maybe cuz it's for a Miata not an rx-8

[@DahiiM1]

Bad design for MAZDA RX-8 It doesn't fit a lot of design mistakes. the screw hols doesn't match with OEM. the OEM brackets does not fit also if you try to make them fit you will damage the radiator.

[@Thefinancialhelper]

A couple ratchets