With track season coming up, I had a few jobs planned for the MX5.
First up, I fitted some gas struts for the bonnet. A much overlooked but worthwhile mod as it means not having that pesky bonnet stand getting in the way when working on the car.
Next up was to tackle the cambelt. I'm sure I've mentioned this before, I bought the car in 2019 with no history of the belt being done. I've owned it for a good while now and it was always on my mind that it needed doing. While these engines are non-interference, I didn't fancy my chances of the belt failing at high rpm and everything remaining intact. So I set about stripping it down...
Little bit of a weird design having the cam cover as part of the front timing belt cover, although it did give me the opportunity to inspect the valvetrain while I had it apart. For good measure I also replaced all O-rings and gaskets within the VVT system while I had the cover off.
The old belt looked absolutely perfect! No cracking or unexpected wear at all, I probably could have left it for another couple of years and saved myself the expense
The cambelt has to be removed to replace the waterpump and so I planned to do both at the same time. Many of the online guides and videos state to use sealant on flanges and mating faces. If it's not mentioned in the service manual, sealant is a bodge and I won't use it. Not to mention it tends to get applied over zealously, ends up hardening and finds its way into the oil pickup. No thanks. All mating faces were cleaned up and properly prepared, ready for the new genuine gaskets to be fitted. So far, no leaks... and no sealant.
The radiator was removed to make sufficient room to get to the cambelt and it became immediately obvious why I was having cooling problems on track last year...
...which wasn't a problem, as I'd already anticipated a knackered rad and ordered a new one. However when something needs replacing, it must be upgraded!
Engine back together and... a non starter. FFS. After much troubleshooting and some swearing, it turns out I'd installed the crank trigger wheel the wrong way round. A quick 10 minute job to re-install it correctly and it fired right up. With the radiator still out, the next job was to replace the power steering pipes at the front of the engine. I'd already replaced the lower (green) pipe after it started leaking last year, so while I had the space to get in there I replaced the remaining two pipes with brand new genuine Mazda items.
Everything back together with the addition of a cheap cone filter for a bit of induction noise. I'm well aware of the downsides of an open air filter in the engine bay (which is why my Impreza has the air filter located in the front bumper) but I figured it'd be interesting to fit it and review the intake temps while on track. This car is a bit of fun, an R&D tool... the filter will be suitably relocated in good time
With the car now back running and driving, there was another job I had to tackle. ANOTHER sticking caliper

At first I enjoyed it, now it is just becoming a chore! The drivers side front caliper was sticking so I rebuilt them both. The rear calipers were replaced with new items about 12 months ago.
Everything re-bled with Motul RBF660 and while I was in there I flushed the clutch fluid through as it was WELL overdue.
Bit of last minute fettling to the seat brackets and added some pads as the seatbelt was just rubbing on my neck
Included with the masses of parts I'd ordered, I also received some stickers. Given that each sticker is worth 5bhp, it'd be rude not to use them.
And today was the finale to all of this work, a track day at my local circuit. The weather was absolutely stunning and a great test for my new cooling mods with 25'c ambient temps. The car was peaking at 93'c coolant which I was very happy with. Plenty of headroom there to introduce more mods and more power. IATs were sitting around 50c which may seem high but given that even the standard airbox doesn't have a dedicated cold air feed, I wouldn't have expected much less when using an enclosed filter. Still, it gives me a baseline to work with and begin improving the current setup.