Post by wannabe on Apr 25, 2019 12:09:59 GMT
Prompted by my discoveries yesterday when getting everything stripped off the engine, I have some questions for the more knowledgeable people, if that would be ok!
If so...
Am I correct in thinking that the standard OEM timing is as follows?
- crank / crank pulley notch at TDC mark on the block
- Inlet and Exhaust camshaft pulleys aligned to each other, and each (therefore) aligned with the appropriate E and I marks on the front sealing plate behind them
- Cam Angle Sensor in a position that (using a timing strobe/light) the crank pulley timing mark/notch is seen at the 10-degree mark on the timing guide (on the bottom cam cover, above/behind the crank pulley) at 850rpm idle
And 'the 14 degree timing mod' is as follows?
- Adjust the Cam Angle Sensor to a position that, at 850rpm idle, the crank pulley timing mark/notch is advanced to the 14-degree mark on the timing guide thing (so to the left of the 10 degree mark) at 850rmp idle
-- (Side question: each mark on the timing guide thing is 1 degree?)
Is anything else needed for the 14-degree mod? (Perhaps something to do with the clockspring thing in the Air Fuel Meter just after the air intake?)
If the above is correct, WTF is going on with my timing as it stands now?!
- Aligning the Inlet cam pulley to the sealing plate mark, the Exhaust cam pulley is rotated anti-clockwise by what looks like 1 notch of the cambelt
- Aligning the crank pulley notch to TDC, the Inlet cam pulley seems to be rotated clockwise by 2 notches of the cambelt, and the Exhaust cam pulley seems to be rotated clockwise by 1 notch of the cambelt
Is this intentional?
Or something gone wrong / setup incorrectly?
When I come to putting everything together should I revert to the OEM timing and then do the 14 degree timing mod?
Any knowledge/advice is very much appreciated!!
If so...
Am I correct in thinking that the standard OEM timing is as follows?
- crank / crank pulley notch at TDC mark on the block
- Inlet and Exhaust camshaft pulleys aligned to each other, and each (therefore) aligned with the appropriate E and I marks on the front sealing plate behind them
- Cam Angle Sensor in a position that (using a timing strobe/light) the crank pulley timing mark/notch is seen at the 10-degree mark on the timing guide (on the bottom cam cover, above/behind the crank pulley) at 850rpm idle
And 'the 14 degree timing mod' is as follows?
- Adjust the Cam Angle Sensor to a position that, at 850rpm idle, the crank pulley timing mark/notch is advanced to the 14-degree mark on the timing guide thing (so to the left of the 10 degree mark) at 850rmp idle
-- (Side question: each mark on the timing guide thing is 1 degree?)
Is anything else needed for the 14-degree mod? (Perhaps something to do with the clockspring thing in the Air Fuel Meter just after the air intake?)
If the above is correct, WTF is going on with my timing as it stands now?!
- Aligning the Inlet cam pulley to the sealing plate mark, the Exhaust cam pulley is rotated anti-clockwise by what looks like 1 notch of the cambelt
- Aligning the crank pulley notch to TDC, the Inlet cam pulley seems to be rotated clockwise by 2 notches of the cambelt, and the Exhaust cam pulley seems to be rotated clockwise by 1 notch of the cambelt
Is this intentional?
Or something gone wrong / setup incorrectly?
When I come to putting everything together should I revert to the OEM timing and then do the 14 degree timing mod?
Any knowledge/advice is very much appreciated!!
so advanced pulleys would seem to match with the theory that NA needs more advance (presumably to allow (more?) fuel in earlier?).
