Quick timing belt question

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Regie
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Quick timing belt question

Postby Regie » Wed May 26, 2010 12:48 pm

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
MY07 NC, Mazdaspeed Body, Ohlins, Full GWR Exhaust, 17x9 RPF1's, 4.1FGR and lots lots more

Juffa
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Quick timing belt question

Postby Juffa » Wed May 26, 2010 1:28 pm

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.
Last edited by Juffa on Wed May 26, 2010 3:04 pm, edited 1 time in total.
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fattima
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Quick timing belt question

Postby fattima » Wed May 26, 2010 2:26 pm

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 :shock:

wun911
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Quick timing belt question

Postby wun911 » Wed May 26, 2010 2:51 pm

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

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Regie
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Quick timing belt question

Postby Regie » Wed May 26, 2010 4:39 pm

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 :P
MY07 NC, Mazdaspeed Body, Ohlins, Full GWR Exhaust, 17x9 RPF1's, 4.1FGR and lots lots more

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fattima
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Quick timing belt question

Postby fattima » Wed May 26, 2010 4:52 pm

This method works a treat
Image
from here
http://www.miata.net/garage/timingbelt.html

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Regie
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Quick timing belt question

Postby Regie » Wed May 26, 2010 7:37 pm

fattima wrote:This method works a treat
Image
from here
http://www.miata.net/garage/timingbelt.html


looks good enough for me!
MY07 NC, Mazdaspeed Body, Ohlins, Full GWR Exhaust, 17x9 RPF1's, 4.1FGR and lots lots more

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StanTheMan
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Quick timing belt question

Postby StanTheMan » Wed May 26, 2010 10:16 pm

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
&
Image

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