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Detroit Diesel MBE 4000 essential bolt tightening torques

 
MBE4000 Main Bearing Bolt torques
Caution - stretch bolts
refer to manual for limits 
step 1 = 100 Nm, 74 lb.ft
step 2 = 200 Nm, 148 lb.ft
step 3 = 300-330 Nm, 221-243 lb.ft
step 4 = + 90°

 
MBE4000 Connecting Rod Bolts
Caution - stretch bolts
refer to manual for limits  
step 1 = 100 Nm, 74 lb.ft
step 2 = + 90°

 
MBE4000 Cylinder head Bolts
Caution - stretch bolts
refer to manual for stretch limits 
step 1 = 10 Nm, 7 lb.ft
step 2 = 50 Nm, 37 lb.ft
step 3 = 100 Nm, 74 lb.ft
step 4 = 200 Nm, 148 lb.ft
step 5 = + 90°
step 6 = + 90°

 

Detroit Diesel MBE 4000 manuals and spec sheets

 

Detroit Diesel MBE 4000 technical issues

 

Detroit Diesel MBE 4000 cylinder heads leaking

Detroit Diesel MBE4000 Cylinder head Bolts are stretch bolts!
The MBE4000 head bolts, because there are stretch bolts, loose their clamping force on reuse, and unless they are strictly within the manufactures stretch limits, should not be used again otherwise leaks will occur.

Stretch bolts, when properly torqued, loose some of their diameter to the stretch, but in correct use are elastic, and if variations in the gasket material or other things occur they keep their clamping force by varying their diameter slightly, but frequently, like breathing. The clamping force of stretch bolts is necessary to retain the inevitable variations of the cylinder head and its composite gasket material deformations due to heat etc. and they automatically keep the necessary clamping force on the head gaskets for them not to not leak.

Steve, BDC, Nov 2017

Non-Stretch Studs
Not withstanding the above technical information, some owners have chosen to replace the stretch bolts with non-stretch studs and nuts, which I am told, are doing a good job resulting in a leak-free engine.

Steve, BDC, April 2018

 

Info from Detroit Diesel MBE 4000 DDEC Report

MBE 4000 DDEC stats
Top Speed Highest recorded speed 96 mph,
154 kph

Current Milage 1,231,371 miles, 
1,981,645 kilometers

Fuel Consumption 5.83 US gal/hour
22.07 liters per hour

Fuel Economy 6.49 miles per gallon
2.759 kilometers per liter
36.24 liters per 100 km

Goodness, what a good servant!

 

Detroit Diesel MBE 4000 key engine specs

MBE 4000 Arrangement
Inline 6 Cylinder
turbocharged

MBE 4000 Displacement
12.8 liter, 781 CID

MBE 4000 Bore
128 mm, 5.04 in

MBE 4000 Stroke
166 mm, 6.54 in

 
MBE 4000 Compression ratio:
18.0:1

MBE 4000 Weight approx:
1030 kg, 2270 lb

MBE 4000 Electronics
DDEC VI

 
MBE 4000 Power 
from
370 hp, 276 kW @ 1900 rpm
to
450 hp, 336 kW @ 1900 rpm

MBE 4000 Torque 
from
1250 lb.ft, 1695 Nm @ 1100 rpm

to
1550 lb.ft, 2100 Nm @ 1100 rpm

 
MBE 4000 Dimensions approx:
length 1339 mm, 53 in
width 1069 mm, 42 in 
height 1130 mm, 45 in

 

Detroit Diesel MBE 4000 additional technical info

 




Barrington Diesel Club
email: steve@barringtondieselclub.co.za
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Page Revision #8.1RS 04-18