need to know about timing marks with tdc being at 11 oclock at crank,i have both sides of heads clocked but my chain marks dont coincide with marks on sprockets. ???

Asked by Nov 30, 2014 at 02:53 PM about the 1999 Mercury Cougar

Question type: Maintenance & Repair

my marks that i made on both timing chains dont match up with my sprockets on cams.. my alldata book says. take timing chain off make a mark(crank), then count 29 mark, then another 42, mark again. take chain n install marks should match up...but they dont ... need help

2 Answers

63,315

Did the engine jump timing before you disassembled it? If so, that would have thrown everything out of whack. The best thing to do is start from scratch. Set the cams and crank to where they need to be to put the correct cylinder at top dead center (TDC). It's usually cylinder #1, but not always. Does the new timing set have dimples on the sprockets to help line them up? HTH. -Jim

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