I just replaced the timing belt on my Catera but once you turn the cams you should take this to a Catilac Dealer or you could do allot more damage if these are off just a little you might bend the valves stems and cause alote more damage. good luck ! Jim
Yes. Absolutely. Not only will it mess up your timing but on some engines if the timing is off far enough, the pistons will hit the valves as the engine is turning. The result will be bent valves. At that point, depending on the engine, you can kiss the heads goodbye. Buy a book and make sure you have the cams set to the appropriate timing marks before you go through all the trouble of putting this thing back together just to have to tear it apart again.
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