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-   -   TDC No.1? (https://www.miataturbo.net/engine-performance-56/tdc-no-1-a-36899/)

slowmx5 07-09-2009 02:17 PM

TDC No.1?
 
OK, I need to identify TDC No.1 (compression stroke). Tell me if I have this right:
Timing marks on crank aligned.
No.1 cylinders cam lobs horizontal and pointing out (large radius inwards).

Correct?

slowmx5 07-11-2009 03:22 AM

Just for information this was correct.

hustler 07-11-2009 10:20 AM

yes, that's correct.

When I deal with this crap, I point both cams to the outside of the car, and put the woodruff key straight up.

Then I bolt everything together and cut a tiny-groove in the valve cover with a hack-saw, fill it in with white paint, then mark the crank pulley and accessory pully so I can check timing without disassembling anything.
http://www.jhodson.net/miata99/images/lockup-w.jpg

kday 07-13-2009 12:22 AM

The keyway in the crank is straight up at #1 TDC as mentioned.

The most foolproof way I have found to find TDC on any car is to pull #1 spark plug, drop a long 1/4" socket extension down the hole, and use a dial indicator. e.g.:
http://www.boost-instruments.com/wp-...009_edited.jpg


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