Help please trigger wheel and Crank sensor location
Turbo Mini Forums

Guys totally confused....
I have just bought a crank sensor bracket from trigger wheels and if using a clock face, it seems like the Sensor mounting point is at 7o'clock ish.... But I am using a pre A+ engine and for some reason TDC is at 1/2 past.... Is TDC on A+ and early types in different locations to confuse matters more im using a lightened flywheel that dosent have any markings either.......is there anyone using a early A series with a Crank sensor setup...Help please!!!

what sort of trigger wheel are you using? is it adjustable?

It doesn't matter where TDC is in relation to the sensor, it matters where the missing tooth is in relation to the sensor, when no1 is at TDC.

It should be 90 degrees (9 teeth, including the missing one) after (clockwise, looking at the pulley) the sensor.

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

Hi Mike thanks for the info..... I think I get what your saying, yes it is an adjustable type, but the thing that is strange is the the early engines didn't have a TDC indicator on the timing cover and the A+ did, I do need to find TDC so I can get the missing tooth correctly aligned though surely. I'm using a Nodiz unit I think it's similar to Mjolt. The missing tooth should it be centrally aligned 90 Deg the TDC, and it dosent matter where the sensor is mounted? thanks again

Okay, in that case, how I set mine up was:

Take out spark plugs + remove rocker cover
Place long rigid object (I used thick solder) in no1 spark plug hole
Rotate engine using socket on pulley nut (or rolling in 4th) to find TDC (when the solder reaches the top, and about inbetween where it stops moving up and where it starts going down) make sure both valves are CLOSED, if not you're 360 deg out (crank degrees).
That is TDC.
With your sensor mounted, attach trigger wheel, and rotate so that there are nine teeth, including the missing one, between the sensor and the missing tooth, counting clockwise.
Tighten crank nut, making sure the trigger wheel doesn't spin, some form of securing it so it doesn.t is a good idea.
Then re check it's still nine teeth (8 actual teeth) after the sensor, when no1 is at TDC.

This is only a VERY rough measurement of TDC, a DTI is needed to do it properly, however there is usually a small error adjustment option in the software.

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

mike brilliant thanks, I was some how worried my rebuild was not right... That all makes perfect sense,
Cheers

No problem, I had the exact same issues when I converted to MJ

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

Have a look at this mate.. Alan

Edited by nala56 on 19th Mar, 2013.

Main Build
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=489133

Upgrade to Turbo
http://www.turbominis.co.uk/forums/index.p...tid=448367&fr=0