How Much Is The Tightening Of Connecting Rod And Main Bearing Of Isuzu 4BE1

Posted in Crank, Oil and Piston
  • How much is the tightening of connecting rod and main bearing of isuzu 4BE1

    There are 4 Answers for "How Much Is The Tightening Of Connecting Rod And Main Bearing Of Isuzu 4BE1"

    1. kelly_f_1999 says:

      you don t tighent them but once and thats when you install them if its loose its bad bearing

    2. flipscadi says:

      What is the thread size? find that out then look up the torque specs for that size bolt.

    3. Old guy_64... says:

      Best place to find out is at the library with a service book for your vehicle. I would not trust “guesses on here”

    4. Country Boy says:

      If you’re asking what the torque should be for the mains and rods your Isuzu dealer will tell you. Your local library has Motors, Chilton’s and Haynes manuals. Any book store or auto-parts store will order an inexpensive specific repair and overhaul manual for your vehicle.

      Crankshaft main and connecting rod bearings are fitted with “crush” clearance when the main saddle and rod cap are put together and torqued. In each case the two bearing halves on each journal (main and rod) are manufactured in very precision thicknesses. It’s not unusual to have a .00150 & .002 rod bearing shell put together on the same journal to get the plasti-gage clearance you’re after.

      Please get this straight: Nearly all street cars publish a maximum torque figure for the main and rod bolts and nuts that compress the rod cap with bearing inside to the connecting rod. If the torque reading is exceeded the bolt will stretch before the actual torque figure goes up.

      Tightening either sets of bolts more than the manufactures recommendation wouldn’t help even if the bolts didn’t stretch. The faces of the rod and main caps, connecting rods and block are the limiting factor in compressing the two bearing halves together. *The bearing halves can not squeezed together any tighter. Bearing clearance is governed bearing thickness of the two shells.

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