O.S. Engines 21VZ-B V-Spec User Manual
Page 7
ENGINE CONSTRUCTION
With this engine, the piston will
feel tight at the top of its stroke
(TDC) when the engine is cold.
This is normal. The cylinder bore
is a little tapered. The piston and
cylinder are designed to achieve
a perfect running clearance
when they reach their running
temperatures.
Around TDC
Cylinder Liner
When the engine is cold. When the engine is hot.
Piston
Crankshaft
A little tapered
6
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