Chevy “Stovebolt” 216 235 Six Cylinder Torque Specifications

Part Type Torque Specification
main cap bolts 100-110
bellhousing bolts 45-55
flywheel bolts 50-65
connecting rod nuts/bolts From 1935 thru 1948, the rod bolt torque was 55-60 ft. lbs
From 1949 thru 1952 the connecting rod bolts were torqued 40-50 ft.lbs with oiled threads
In 1953 the connecting rod cap bolts were torqued 35-45 ft. lbs
oil pan corner bolts 12-15
oil pan bolts 6-7
clutch pressure plate bolts 25-30
cylinder head bolts the early head bolts (1935 thru 1952) were torqued 75-80 ft. lbs
later 90-95 ft lbs
manifold clamp bolts 15-20
manifold end clamp bolts 25-30
water pump bolts 25-30
spark plugs 14 mm plugs threads, so not all plugs are torqued 20-25 ft. lbs
smaller 10mm plugs used on 216s from about 1941 to about 1948 are only torqued 12-15 ft. lbs
Pay attention and be careful!
fuel pump bolts 15-20
rocker shaft bolts 25-30

Click Here for the Cylinder Head Torque Sequence for 235 Chevy engines

4 comments »

  1. Jay Jackson said,
    July 7, 2014 @ 10:58 pm

    Thanks for providing the specs for a Chevy 235 6-cyl

  2. Frank Branzuela said,
    October 7, 2014 @ 5:43 am

    Not all 216 engines used 14 mm plugs threads, so not all plugs are torqued 20-25 ft. lbs. The smaller 10mm plugs used on 216s from about 1941 to about 1948 are only torqued 12-15 ft. lbs. Pay attention and be careful. Also, the early head bolts (1935 thru 1952) were torqued 75-80 ft. lbs, not 90-95 ft. lbs. Connecting rod bolt torque changed over the years too. From 1935 thru 1948, the rod bolt torque was 55-60 ft. lbs. From 1949 thru 1952 the connecting rod bolts were torqued 40-50 ft.lbs with oiled threads. In 1953 the connecting rod cap bolts were torqued 35-45 ft. lbs. Folks working on these older engines need to be really careful taking hear-say as fact. Find a shop manual reprint, or visit a library. It might save you from making some very costly mistakes.

    • Scott said,
      January 6, 2015 @ 3:43 am

      Thanks for the update Frank, I added/corrected the information.

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