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Be thankful we have Volvo Engines! 200

posted by  Jorrell on  Tue Mar 13 14:58 CST 2007
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last visit: Thu Dec 27 03:00 CST 2012
[RELATED]

This is a non-Volvo topic, but I just finished up bolting a new cylinder head to a Mitsu 4G64 block. Here is their head bolt torque specs:

1: Crank the head bolts to 58 ft-lb in a cross (not circle) pattern.
2: Then in reverse pattern, loosen all head bolts to 0 ft-lb.
3: Torque all 10 head bolts to 14 ft-lb in the same cross pattern.
4: Now, turn each head bolt 90 degrees clock wise in the cross pattern.
5: We thought we were all done, but wait, crank each head bolt another 90 degrees clockwise in the same cross pattern.

Any guess what the final bolt torque was on the head bolts? Alloy head, cast block? The average was 253 ft-lb! Is this a steel head gasket phenomenon or have I just lost touch with "modern" engines?

jorrell
--
92 245 245K miles, IPD'd to the hilt, 06 XC70, 00 Eclipse custom Turbo setup...currently in pieces






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