Cylinder sleeves are of the replaceable, wet-type which
are surrounded by water to provide immediate positive
heat dissipation. The sleeves are machined by a special
process called Plateau-Honing. This process provides a
sleeve finish which results in rapid engine run-in.
Induction hardening of the sleeves I.D. results in low
wear rates and long life. (Hardening is used only on
certain applications with higher HP ratings).
The block is made of high strength alloy iron which
minimizes weight without sacrificing engine rigidity. An
outstanding feature of the 400 series engines Is that
crankshaft wear is distributed over 7 main bearings
rather than 4 main bearings which is common among
competitive make engines.
The crankshaft Is constructed of induction hardened
forged steel; International not only Induction hardens the
journal areas, but the fillet areas as well on 466 Series
Engines, since this area is where crankshaft failures
*PRINTED IN UNITED STATES OF AMERICA