chain tensioner removal or loosening (for IMS)

[Sisuguy]

JFP just a quick question, how do you handle TDC with an under drive pulley? Do you have a std. Pulley you install just for the timing check?

[JFP in PA]

JFP just a quick question, how do you handle TDC with an under drive pulley? Do you have a std. Pulley you install just for the timing check?

Depends upon whose underdrive pulley, and how it was installed. Some of these pulley's still have the TDC markings and opening for the pin in them, and as long as you didn't get Palaeolithic when cutting down the boss on the case, the OEM pin still works. For cases where the boss was totally butchered, or the pulley lacks markings or will not accomadate the pin, we fabricated an "arm" out of flat stock that bolts to the rear crank flange on one end, and to the engine case bolt holes for the bell housing on the other, and which is adjustable, to hold the engine at TDC. Works very well, and saves time. We also keep a stock pulley around for backup.

[CBRacerX]

Thanks for this thread, I have found it very useful as I prepare to install the LN Pro double row bearing on my 2001 single row 986S.  As usual, I see JFP providing invaluable advice and experience.  THANK YOU! If your shop was closer I'd be happy to buy a round :)