CAT C4.4, C6.6 Specs, bolt torques and manuals

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Your Diesel Engine Specs

Basic specs are open to everyone and include images, displacement, dimensions and weight, essential bolt tightening torques, the characteristics of the engine like its power and torque.
Essential bolt tightening torques are the main bearing cap bolt torque, the connecting rod cap bolt torque and the cylinder head bolt torques.


Some Popular Engine Specs




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

CAT C4.4 and C6.6 essential bolt 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°

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

CAT C4.4 and C6.6 Spec Sheet, Manuals, training


CAT C4.4 and C6.6 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




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email: steve@barringtondieselclub.co.za
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