How to Use Mr. Gasket's GM LS Alignment Tools
Unlike the front and rear cover for most engines, LS applications don't have dowel pins to locate them, which often creates unnecessary leaks if they're not centered properly. That's where budget-friendly, easy-to-use Mr. Gasket Alignment Tools come in. To install a front cover, first make sure your cover and gasket surfaces are clean and then dab a little RTV on the corners. Put the cover in place, but don't torque it down – just make it finger-tight. Make sure to lube the O-rings with a little oil so they don't stick or tear. Now place the alignment tool onto the crank snout, making sure that bottom of the timing cover is flush with the engine block. Snug up the bolts, working your away around the perimeter in a crisscross pattern. Check to be sure you can spin the tool as you tighten the bolts. Then just torque everything down to 18 foot-pounds using the same crisscross pattern.
For the rear cover, the process is virtually the same – just use the lower two oil pan bolts to pull the cover down so you can insert the alignment tool. Tap the tool in with a rubber mallet and snug down all the bolts, then torque them to 18 foot-pounds and torque the pan bolts to 106 inch-pounds. Install the rear main seal, using a rubber mallet on the tool to tap-in the rear seal, torque the remaining bolts, and you're done.
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