350Z V6-3.5L (VQ35) (2003)
Outer Diameter of Cylinder Head Bolts
Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between d1 and d2 exceeds the limit, replace them
with new one.
Limit (d1 - d2)......................0.11 mm (0.0043 inch)
If reduction of outer diameter appears in a position other than d2, use it as d2 point.
INSTALLATION
1. Install cylinder head gasket.
2. Turn the crankshaft until No. 1 piston is set at TDC on the compression stroke.
he crankshaft key should line up with the right bank cylinder center line as shown.
3. Install cylinder head follow the steps below to tighten cylinder head bolts in the order shown in figure.
a. Tighten all bolts to 98.1 Nm (10 kgf-cm, 72 ft. lbs.).
b. Completely loosen to 0 Nm (0 kgf-cm, 0 ft. lbs.).
CAUTION: In step "b", loosen bolts in the reverse order of that indicated in figure.
c. Tighten all bolts to 34.3 to 44.1 Nm (3.5 to 4.4 kgf-cm, 26 to 32 ft. lbs.).
d. Turn all bolts 90 to 95 degrees clockwise [target: 90 degrees (angle tightening)].
e. Turn all bolts 90 to 95 degrees clockwise again [target: 90 degrees (angle tightening)].