User guide

MILODON
2250 Agate Court
Simi Valley, Ca 93065
[phone]
TWO BOLT MAIN CAP
INSTALLATION INSTRUCTIONS
The tensile strength of the ductile iron that Milodon uses in these main caps is 85,000 PSI.
This is considerably stronger than other mild steel “Billet Caps". Also the expansion rate of ductile
iron is equal to that of the cylinder block, eliminating engine bearing failure due to irregular bearing
bore expansion when the engine reaches operating temperature.
Milodon supplies complete bolt kits with all main cap sets. However, if maximum strength and
durability are required, studs should be used. Studs are available for all applications, refer to the
Milodon catalog for specific part numbers.
STEP 1 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 2 Clean block and caps thoroughly removing all burrs. Install the main caps on the block.
STEP 3 Torque all bolts, using oil.
7/16" bolts torque to 65 ft lbs.
1 / 2" bolts torque to 110 ft lbs
STEP 4 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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