Cummins 4BT engine specs at Barrington Diesel Club

Barrington Diesel club provides Cummins engine specs and technical Data

Cummins 4BT engine specs are to be found at Barrington Diesel Club, whose aim it is to provide technical data, specs and bolt torques relevant to Cummins, Detroit Diesel, EMD and ADE engines.
At Barrington diesel club bolt tightening torques and fuel consumption rates are provided for many engines beginning with Detroit Diesel,Cummins, and ADE. Our Web Log provides a forum for discussing diesel engine features and problems. We also provide general technical data such as Standard Torques for bolts and nuts, Properties of materials like the melting and boiling points of metals, metric to imperial cross references, SAE Flywheel housing sizes, as well as providing articles of general interest like discussions on fuel consumption and Detroit Diesel Air Box Pressures.

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Specs for 4BT Cummins diesel engines and technical data provided courtesy of Barrington Diesel Club

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Physical Characteristics 4BT Cummins engine
Weight	860 lbs	390 kgs
Length	31"	790 mm
Width	28"	711 mm
Height	35"	894 mm
Compression Ratio	17.5:1
Displacement	238 Cu Inches	3900 ml
Bore	4.02 inches	102 mm
Stroke	4.75 inches	120 mm

Physical Characteristics 4BT Cummins engine

Weight

860 lbs

390 kgs

Length

31"

790 mm

Width

28"

711 mm

Height

35"

894 mm

Compression Ratio

17.5:1

Displacement

238 Cu Inches

3900 ml

Bore

4.02 inches

102 mm

Stroke

4.75 inches

120 mm

Torque specifications Cummins 4BT Engine
Torques (Non standard)	Bolt Size	Ft Lbs	Nm
* Mains	M14-2.00 x 119mm	130	176
Con Rod bolts / Big Ends	M11-1.25 x 59mm	74	102
Front Cover	M8-1.25	18	24
Oil Pick Up	M8-1.25 x 16mm	18	24
Fuel pump drive lock nut	.	48	65
Flywheel housing	M12-1.25 x 40mm	57	77
* Flywheel bolts	M12-1.25 x 32mm	101	137
Injector hold-down	.	44	60
Damper	.	101	137
* Cylinder Head	M12-1.75	93	126
.	.	.	.
*	Lubricate with 'International Compound No 2, or Copper-Slip' or equivalent.

Torque specifications Cummins 4BT Engine

Torques (Non standard)

Bolt Size

Ft Lbs

* Mains

M14-2.00 x 119mm

130

176

Con Rod bolts / Big Ends

M11-1.25 x 59mm

102

Front Cover

M8-1.25

Oil Pick Up

M8-1.25 x 16mm

Fuel pump drive lock nut

Flywheel housing

M12-1.25 x 40mm

* Flywheel bolts

M12-1.25 x 32mm

101

137

Injector hold-down

Damper

101

137

* Cylinder Head

M12-1.75

126

Lubricate with 'International Compound No 2, or Copper-Slip' or equivalent.

Settings 4BT Cummins engine
Set	Inches	mm
Valves Inlet (cold)	0.012	0.30
Valves Exhaust (cold)	0.024	0.61

Settings 4BT Cummins engine

Set

Inches

Valves Inlet (cold)

0.012

0.30

Valves Exhaust (cold)

0.024

0.61

Assembly clearances 4BT Cummins engine
Part	Min - Inches	Min - mm	Max - Inches	Max - mm
Mains	0.001	0.026	0.0047	0.120
Con Rod bolts / Big Ends	0.001	0.0254	0.0045	0.1143
Con rod side clearance	0.004	0.100	0.012	0.305
Crank end float	0.005	0.127	0.014	0.356
Front gear back lash	0.003	0.076	0.013	0.330
Cam end float	0.005	0.127	0.013	0.330
Cam back lash	0.003	0.076	0.013	0.330
Piston Protrusion	.	.	0.026	0.660

Assembly clearances 4BT Cummins engine

Part

Min - Inches

Min - mm

Max - Inches

Max - mm

Mains

0.001

0.026

0.0047

0.120

Con Rod bolts / Big Ends

0.001

0.0254

0.0045

0.1143

Con rod side clearance

0.004

0.100

0.012

0.305

Crank end float

0.005

0.127

0.014

0.356

Front gear back lash

0.003

0.076

0.013

0.330

Cam end float

0.005

0.127

0.013

0.330

Cam back lash

0.003

0.076

0.013

0.330

Piston Protrusion

0.026

0.660