G3408 and G3412 Engines Caterpillar


Valve Cover

Usage:

G3412 3NK



Illustration 1g01394513

Typical example




Illustration 2g01352989

Bolt tightening sequence for valve cover base




Illustration 3g01413156

Bolt tightening sequence for the valve mechanism cover

(1) Torque the bolts for the valve cover base in the numerical sequence that is shown in Illustration 2. ... 14 ± 4 N·m (125 ± 35 lb in)

(2) Torque the bolts for the valve mechanism cover in the numerical sequence that is shown in Illustration 3. ... 14 ± 4 N·m (125 ± 35 lb in)

(3) Cut the seal for the valve mechanism cover to the following length. ... 1409.7 ± 6.4 mm (55.50 ± 0.25 inch)

(4) Cut the seal for valve cover base to the following length. ... 1625.6 ± 6.4 mm (64.00 ± 0.25 inch)

(5) Before installation, coat both ends of the seals with black Loctite 593.




Illustration 4g01413358

Section A-A

Use the following procedure to install the adapter (6) :

  1. Lubricate the bore lightly with clean engine oil.

  1. Lubricate the O-ring seal (7) lightly with clean engine oil.

  1. Freeze the adapter to at least -18 °C (-0 °F).

  1. Install the adapter.
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