Milodon 4 Bolt Main Caps - with Angle Side Bolts - Manual (Page 2)

will excessively distort the main bearing bores. These tolerances are important and
must be held closely.
STEP 3 Clean all main bolt holes with a tap. A bottoming tap is recommended on all blocks.
Bolts should be checked on each hole to be sure the bolts do not bottom out in the
holes or an incorrect torque reading will result. For maximum strength main studs
should be used.
STEP 4 Once register depths are correct, install the main caps on the block and tighten center
bolts. Insert bushing supplied with your kit into angled side bolt hole in cap. For
3/8" bolts drill block with 5/16" drill bit ONLY deep enough for bolt length plus
approximately 1/8" clearance. DO NOT drill any deeper than necessary or you will
drill into the water jacket. Check to be sure bolt will not bottom out in hole. Remove
drill bushing and use the cap itself as a tap fixture then tap 3/8"-16 threads. Finish up
with a bottom tap. Note: for 7/16" side bolts follow same procedures above except
drill block with 3/8" drill bit and tap with 7/16" - 14. Extra care must be taken not to
drill too deep as the main oil passage will be intersected.
STEP 5 Clean block thoroughly removing all chips and burrs. Tighten all bolts with a
conventional inside to outside pattern, using oil.
7/16" center bolts torque to 65 ft lbs.
1 / 2" center bolts torque to 110 ft lbs
3 / 8" side bolts torque to 35 ft lbs.
7/16" side bolts torque to 45 ft lbs.
STEP 6 The block is now ready to be align bored. Align bore block initially with a rough cut to
.010 under finished size. On the second pass, align bore exactly to finish size. Align
honing should not necessary if bore can be done close enough. If not, rough align
bore then hone for the final finish. Debur and clean as necessary.
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