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| Lower intake manifold- broken bolt I was replacing all the gaskets on my lower and upper intake manifold and ran into a problem. After installing the lower gasket, then installing the lower intake to the engine block, there are 8 bolts. the following are the specs for the torque on tightening them. Using the guide pins, install the intake manifold. Tighten the bolts in sequence in four steps. 1 Tighten to 2.5 Nm (22 inch lbs.) . 2 Tighten to 10 Nm (88 inch lbs.) . 3 Tighten to 13 Nm (115 inch lbs.) . 4 Tighten to 14-18 Nm (11-13 ft. lbs.) so i started by doing all 8 bolts at 22lb, then i was attempting to do the second step at 88lb, and when i was doing bolt #1 it snapped..... I do not under stand the above steps, why would you tighten them from 22 to 88 to 115 then 11-13? Why do step #4? I'm also trying to figure out why the bolt broke? It broke around 40 - 45 lbs Are you suppose to use brand new bolts? Any suggestions would be appreciated.. |
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