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I shall be attempting a timing belt change on my car next week. Done them before on mates cars, so hopefully all will go well.

Just a quick question. Does anyone have the tool for holding the crank while undoing the big nut (simialr to the tool in the service manual) Any chance i could borrow for a week?

if not is there any secrets as to getting the nut off?

Cheers

I found that by putting the car into gear, 5th I believe, then I could undo the nut. Just make sure the rear wheels are on the ground, hand brake is applied and the wheels are chocked so the car can't move. I used a large pry bar over the socket wrench to give me the leverage.

Have you worked out how to stop the cams moving when changing the belt?

J.

Both times I've done a cambelt change I did as Juffa mentions, no problems. One I didn't need an extension the bolt just unwound with very little force

flyin miata sells the tool you want its like 30 bucks someone should buy it and cut out a template...

Juffa wrote:I found that by putting the car into gear, 5th I believe, then I could undo the nut. Just make sure the rear wheels are on the ground, hand brake is applied and the wheels are chocked so the car can't move. I used a large pry bar over the socket wrench to give me the leverage.

Have you worked out how to stop the cams moving when changing the belt?

J.

ahh didnt think of that...it should do the job then

as for the cams moving...nup i got a week to think about it

This method works a treat

from here
http://www.miata.net/garage/timingbelt.html

fattima wrote:This method works a treat

from here
http://www.miata.net/garage/timingbelt.html

looks good enough for me!

each to thier own. Whatever works for you.
But I found TDC on No 1
line up the marks works a treat.

Unfortunately with your NB8B you don't have the luxury of the marks you have with the non VVT models
&


But frankly I'd personally check the markings & final check with counting teeth. Maybe even mark the cam sprockets on the intake side.