Print Page - 12A - no timing marks on pulley

Title: 12A - no timing marks on pulley
Post by: Martiny on February 04, 2007, 10:46:39 AM

Hi guys

I have a 12A pulley that looks like it takes 3 belts. The thing is , I cant see any timing marks on the pulley. (unless i am being thick - and it HAS happened before!).

I think the distributor is electronic, ( I am guessing its from 1984 ) so in theory I should only have to set the timing once. I will have to mark the pulley myself I suppose.

As a starting point, how do I find TDC? I have the pulley off and the engine out of the car, and the distributor is out.

Title: 12A - no timing marks on pulley
Post by: MikeLMR on February 04, 2007, 03:01:34 PM

there should be some marks on the edge closest to the engine. if not you may have to make your own using the keyway as a reference (is the 12 front pulley a one piece jobbie ... no seperate hub with bolts)

Title: 12A - no timing marks on pulley
Post by: Martiny on February 04, 2007, 04:33:26 PM

Thanks Mike

Its a seperate one with bolts.

I guess what I should do is remove the plugs and rotate until No1 Rotor shows closest in plug-holes.

Then I have an idea where tdc is, and I can look closely at the pulley there.

Title: 12A - no timing marks on pulley
Post by: Martiny on February 04, 2007, 07:55:35 PM

Ah ah!
Thanks Mike, I was looking mostly on the outer most pulley. Checked the inner-most pulley and I found them . Will paint them white now !

Mazda Rotary Club

General => General Technical => Topic started by: Martiny on February 04, 2007, 10:46:39 AM