Hello Miata Men and Ladies. Can I replace my heater core hoses without draining the radiator? I know I'll have to burp it.

Also how much coolant will be coming from the heater core? Are we talking big mess here?

Hi so im new to Miata’s and this Reddit in general, I’ve noticed a smell coming from the engine bay, initially i thought it was me being bad at manuals and smelling the clutch (still might be it since sometimes i notice it sometimes i dont) but i also noticed what looks like oil around the sensor next to the oil cap, is that possible? Also whats the name of that sensor?this is s general pick btw

I have a 1.8 BP4W and the crank, pistons, cylinders etc went to shit. I had an oil starvation. I am planning on swapping a newer 01-05 BP block while keeping the oil pan and the head. One thing I am concerned about is that the compression ratio of 01-05 blocks is 10:1 instead of 9.5. Will this lead to any trouble, should I somehow adjust for that or ???

Also 01-05 BP blocks use composite gaskets. Can I run it with MLS?

If you have any suggestions for such undertaking I will really appreciate it. I can’t wait to drive my miata again😢

Hi,

I have a 1.8 NA Eunos roadster. Been having an issue with misfiring and poor idling. Car has a lack of power all round, I have changed spark plugs, HT leads, coilpack, fuel injectors, CAS, MAF, fuel filter, coolant temp sensor, all engine bay fuses. Checked all vacuum lines with no leaks, changed PCV valve. Compression is good on all cylinders. Still the MX5 does not run correctly. Idle jumps around, engine shakes underload, exhaust gases smell normal (no fuel smell, no smoke). Have run the car warm and cold and symptoms are still present. I have noticed black soot on the spark plugs which I would assume the car is running lean on fuel. Just wondering if anyone had any ideas on what I can try?

Forgot to mention the car is stock other than having an mx5parts cat back exhaust and a pipercross cone airfilter

Reccomendations on any white wheels that you think would look good with him?

Hey guys, Been trying to track down the cause of this white smoke in my 99 nb1. When I cold start the car there is no smoke at all, it will idle all the way up to operating temps, even with the cooling fan turning on and have no smoke, but as soon as I rev it or drive it it'll start smoking white, the video attached above is right after parking it from a drive. I have compression tested with normal similar numbers across all 4 cylinders. I used the tube with blue liquid to test for headgasket, liquid didn't change color indicating headgasket is good. I'm not losing any coolant. No oil in coolant or coolant in oil. I don't have a compressor to do a leak down test which is the next thing that makes sense for me to do, so before I send it to a shop to leak down test/diagnose, does anybody have any ideas of things to look into?

Good day,

I am wondering where do the square guys go? I found everything in pieces in a box. I got everything figured out but the square shafts.

Do they bolt up in the boot?

Thank you

My husband recently converted the AC unit to R134a for his 93 NA and we are wondering if anyone with 94-97 can take a picture of the sticker under the hood for us with the AC info. its the one that looks like this

https://preview.redd.it/naerer7hw2vc1.jpg?width=1500&format=pjpg&auto=webp&s=4d868048677cd5daef230248bdcab66a1a7f2c4c

thank you!

I pulled my engine and replaced a ton of stuff and found this in the table with all of my bolts on it and have no clue what it is?

How much are used 2023/24 nd2 miata OEM rims going for? Looking to replace a rim but buying new is super pricey. Im guessing part outs from people upgrading after market rims from new nds should be cheaper

Looks pretty much at home 🏡

Car came with this stainless shift knob. Been trying to remove it and have only managed to turn the knob so the numbers no longer face the right way and it is no looser.

It genuinely feels like I’m going to break something with the stick itself before this thing actually gets loose and I’m at a loss. Any ideas?

Hi guys,

Bought this motor oil for my NC 1.8 Any opinion or reviews you might have?

Recently bought this - what appeared to be - mint condition and rust free -03 NB2. I've found some rust inside the trunk due to water being trapped there and now this sill rust. I'm worries the sill is rusting from the inside out but it could just be that the sill plate has rubbed some paint off of this area and due to moisture trapped there it has began to rust? Easy to fix this but I'm worried it will continue to develop in between the seam.

Bone stock 90 na, what to check or ?

Looking to see if I can get a name of or a part number to these brackets on my NB that should rest against the soft top latches. Hard top was originally off of an NA, so it doesn’t fit entirely proper.

TIA! - unfortunately couldn’t find much out on my own on this one.

Here's a fun side by side for comparison, cylinder 4 on the left vs 1 on right that was previously torqued by the hulk (and cracked the spark plug above the threads when removing!). Compression tester went in fine, and plugs screw about 2/3 in fine, but bottom just seems to have some build up on it. Not sure best approach but I think thread chaser is best option? Thanks!

All cylinder pumping out 220psi so lots of carbon build up but at least solid numbers

I was driving south through town yesterday and I saw a red NA driving north. I was so happy, I just had to scream MIATA at the top of my lungs! Whoever that was, thank you. I really needed that! That made my day.

Just a nice day and I thought the pic looked cool. Have a good one.

Yes I'll be researching later myself but thought I would seek opinion here as well: can the most recent generation be retro fitted with brembo brakes as comes with the sport package? Is there much difference in spirited road driving?

I'll start: What oil do you put in a 1995 NA Miata MX-5?