CATERPILLAR C4.4, C6.6 bolt torques, specifications and manuals

CATERPILLAR C4.4, C6.6 Essential Diesel Engine Bolt Tightening Torques

Main Bearing Bolts
Step 1 = 80 Nm, 59 lb.ft
Step 2 = + 90°

Connecting Rod Bolts
Step 1 = 18 Nm, 13 lb.ft
Step 2 = 70 Nm, 52 lb.ft
Step 3 = + 120°

Cylinder head Bolts
Step 1 = 50 Nm, 37 lb.ft
Step 2 = 100 Nm, 74 lb.ft
Step 3 = +225°

CAT C6.6 cylinder head bolt torque sequence
CAT C6.6 cylinder head bolt torque sequence 
Different from most other engines

CATERPILLAR C4.4 and C6.6 Diesel Engine Specs

Displacement
C4.4 approx 4.4 liter, 269 CID
C6.6 approx 6.6 liter, 403 CID

Bore = 4.13 in, 105 mm	 
Stroke = 5.0 in, 127 mm

Arrangement
C4.4 - 4 Cyl In-Line, turbo, aftercooled 
C6.6 - 6 Cyl In-Line, turbo, aftercooled 

Power 
C4.4
59-136 kW, 79-183 hp
@2200-2500 rpm
C6.6
89-205 kW, 119-275 hp
@2200-2500 rpm



Dimensions:
C6.6 approx
Length 929 mm, 37 in
Width 668 mm, 27 in
Height 797 mm 32 in

Weight:
C6.6 approx dry
1115 lb
506 kg

Compression ratio:
16.2:1


CATERPILLAR C4.4 and C6.6 Diesel Engine Spec Sheets

CATERPILLAR C4.4 and C6.6 Diesel Engine workshop repair Manuals




Barrington Diesel Club
Phone: +27 72 754 4660
email: steve@barringtondieselclub.co.za
© copyright Steve Barrington 2016

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