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Trying to line up TDC.

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Old 03-19-2010 | 02:31 PM
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Default Trying to line up TDC.

Hey guys I'm preparing for a TB replacement.
What size socket do I need to be able to turn over the engine by hand so I can line up TDC? I can't seem to find it in the manual, And I tried just about every socket I have and it doesn't seem that I have the proper one.

Thanks
Chris
Old 03-19-2010 | 02:58 PM
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27mm I believe
Old 03-19-2010 | 03:48 PM
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It is best to get a deep socket as it sits back in there pretty far. But yes, it is 27mm.
Old 03-19-2010 | 04:02 PM
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My deep 1/2" drive 27mm does the trick perfectly. The close-enough Imperial size is 1 1/16" I believe.

For actually removing that bolt for your TB project, you'll want to find/buy/borrow/rent a 27MM six-point socket in 3/4" drive. And get a long handle or bar with 3/4" drive end on it to get the bolt loose. The same socket with the 3/4" torque wrench is needed to tighten the bolt. The 240 or so lbs/ft tightening torque is more than a 1/2" drive will normall tolerate. My 1/2" drive torque wrench only goes to 200 lbs/ft. The removal torque can be a LOT more than the tightening torque for some reason. I have a five-foot bar with a 3/4" square drive adapter for popping those bolts and the rear wheel nuts loose; leverage is your friend, according to my friend Sir 'Fig' Newton.
Old 03-19-2010 | 04:51 PM
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Also if your doing the timing belt on an interfearance motor you should be doing it with the crank at 45 degrees not TDC just incase one of the cams moves, you wouldn't want valve piston contact.



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