EM-75
ENGINE MECHANICAL Cylinder Head
INSTALLATION OF CYLINDER HEAD
(See page EM-54)
1. CHECK PISTON PROTRUSION AND SELECT
CYLINDER HEAD GASKET
A. Check piston protrusions each cylinder
(a) Clean the cylinder block solvent.
(b) Set the piston of the cylinder to be measured to
slightly befor TDC.
(c) Place a dial indicator on the cylinder block, and set the
dial indicator at 0 mm (0 in.)
HINT:
• Use a dial indicator measuring tip as shown in the
illustration.
• Make sure that the measuring tip is sqaure to the cylinder
block gasket surface and piston head when taking the
measurments.
(d) Find where the piston head protrudes most by slowly
turning the crankshaft clockwise and counterclock-
wise.
(e) Measure each cylinder at two places as shown in
the illustration, making a tatal of ten measurements
(1PZ) or twelve measurements (1 HZ and 1HD-T).
(f) For the piston protrusion value of each cylinder, use
the average of the two measurements of each cylinder.
Protrusion:
IPZ and 1HZ
0.405-0.655 mm (0.0159-0.0258 in.)
1HD-T
0.475-0.725 mm (0.0187-0.0285 in.)
(When removing piston and connecting rod assembly)
If the protrusion is not as specified, remove the piston and
connecting rod assembly (See page EM-86) and reinstall it
(See page EM-108).
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