FOR PONTIAC 455 GD-455/455N

* Clean and remove all preserve. Apply grease on bronze ring and place it on the back of cam gear. .

* Turn NO.1 piston to TDC posisiton and install crank and cam gears. Line up timing marks to face each other.

* Grind off the register on cam gear for adjustment of cam geaR height.

* Slide idle gear half way in between both gears with the larger gear on the passenger side and the longer axle toward to engine block.

* Put timing cover & gasket in place. Push the idle gear all the way in. Remove cover and make sure to have a 0.015- 0.060" clearance betwen axle and block. The idle gear is riding on the timing cover in normal operation. Grind off axle end to increase clearance or install a bolt on cover to reduce clearance.

* Install cam gear bolts with proper torque. Make sure locking plate is installed.

* Hand crank engine to ensure the gear set is running smoothly. When the larger idle gear is in hard mesh, the small idle gear must has 0.005-0.070" clearance for freely up down movement.

* Place timing cover with seal compound on both side of gasket.

*Run engine at slow speed to ensure no abnormal sound from timing set.

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CAT POWER ENGINE PARTS, INC.