Disassembly and Reassembly
32
Cylinder Head
Removal
1. Four Cylinder Only—Remove the manifold
bolts and manifold.
2. Remove all head bolts.
3. Tap the head with a soft hammer or a soft
punch to loosen the head. Remove the head.
4. Carefully remove any gasket material from the
crankcase or cylinder head.
Repair
1. Check all gasket surfaces for cracks, deep
scratches, pitting, or anything that may
prevent proper sealing.
2. Check head for warping with straight edge.
The maximum allowable warpage is 0.0005
in. over any 2 in. span, or a total of 0.002 in.
over the entire head. To maintain critical
alignment of assembled components, Thermo
King does not recommend resurfacing
cylinder heads.
3. Inspect all thread holes for striped threads. Do
not use threaded inserts (Helicoils) to repair
damaged threads.
Installation
1. Apply clean refrigerant oil to the gaskets.
2. Two Cylinder Only—Install the cylinder head
gasket and head with all the bolts assembled
loosely. Tighten the bolts in a criss-cross
pattern to 70% of recommended torque. See
“Torque Values” on page 24. Use a hand
torque wrench to tighten the head bolts to final
torque.
1.
Soft Punch
Figure 15: Cylinder Head Removal
CAUTION: Do not pry on head or wedge
any object between head and block.
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1.
Inspect Surface
2.
Check Threads
Figure 16: Inspection of Cylinder Head
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