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Cam belt alignment question
Posted: Mon Jan 20, 2014 5:01 pm
by Purfler
I'm changing the cam belt on my NA and am not happy with the alignment. These photos show it:
https://picasaweb.google.com/timrobinson22/MX502By my eye (but it doesn't show in the photo) the inlet is about half a tooth out. I have alos used the alignment system in Rod's book (the Veloce one). By those mark it is OK, but I'm not happy.
Any thoughts?
Thanks again,
Tim
Re: Cam belt alignment question
Posted: Mon Jan 20, 2014 5:13 pm
by Regie
from memory there are suppose to be 19 ribs between the marks on the cam gears.
looks like you have 19 there you are on the money
Re: Cam belt alignment question
Posted: Mon Jan 20, 2014 5:29 pm
by aka_juffa
Your E and I are lned up, so like Regime I think you are good to go.
If you want a 3rd opinion then check out the timing belt page on the big forum.
http://WWW.miata.net/garage/timingbeltJ
Re: Cam belt alignment question
Posted: Mon Jan 20, 2014 5:44 pm
by Gladiator
I agree. It looks ok. If it still lines up the same after carrying out the tensioning proceedure (see the book). IMO it's all good.
Re: Cam belt alignment question
Posted: Mon Jan 20, 2014 6:06 pm
by Purfler
Thanks for the comments. I will do the tensioning in the morning and see how it goes.
Thanks again,
Tim
Re: Cam belt alignment question
Posted: Mon Jan 27, 2014 12:17 am
by droo
i havent been able to be on for the past week - i made this a while back, might help out.
https://www.youtube.com/watch?v=pOOUIwS ... I&index=15
Re: Cam belt alignment question
Posted: Mon Jan 27, 2014 1:10 pm
by Purfler
Thanks for the reply droo. I had found your clip myself and found it helpful. I used a slight variation of it where I had the cams held in place with spanners and moved the crank half a notch. Despite my concern at it not looking properly aligned after I did the tensioning it was all fine. This was the first time I have replaced a cam belt with the engine out and it is certainly easy to see what you are doing.
Tim