I NEED TO KNOW THE BEST WAY TO REMOVE THE CAMSHAFT SPROCKET BOLT?
2000 Pontiac Bonneville
August, 30, 2012 AT 3:09 PM
I am trying to remove my timing chain to replace the crankshaft sprocket and key. I have the timing cover off. The engine is still in the car. I tried getting it off with a breaker bar, with a vise grip attached to sprocket to stop movement. The bolt did not budge. How do I set the timing on this car, before removing the bolt? This is the ssei model.
1. Remove front cover. See FRONT COVER. Inspect timing chain and sprockets for wear. Timing chain in and out movement should not exceed 1" (25.4 mm). Replace components as necessary.
2. Rotate crankshaft to align timing marks on camshaft and crankshaft sprockets. See Fig. 9. Remove timing chain damper assembly. Remove camshaft sprocket bolts, and discard. Remove camshaft sprocket and Expand/Co
timing chain. Remove crankshaft sprocket. HEADIN
NOTE: If balance shaft has been moved, ensure alignment is correct before installing timing chain and sprockets. See BALANCE SHAFT. ? MOD
1. If engine has been rotated, rotate the crankshaft so No. 1 cylinder is at TDC. Temporarily install camshaft sprocket. Rotate camshaft sprocket so timing mark points downward.
2. Install timing chain on camshaft and crankshaft sprockets. Align timing marks. See Fig. 9. Install NEW camshaft sprocket bolts. Install timing chain damper. Rotate engine 2 revolutions. Ensure timing marks are ?
Aligned. To complete installation, reverse removal procedure.
Fig. 9: Exploded View Of Timing Chain & Sprockets
Courtesy of GENERAL MOTORS CORP.
This is pretty cut and dried as far as removal and install. Your only problem wil be room and you cna either cut a hole in the fender well if the bolt is to long or beat the sheetmetal to make room but you sholdn't really have to. Once it's loosened up it should screw out by hand or a racheting combanation wrench. Remember to get anew bolt. Torque is 74 ft lbs plus 90 degrees