BMC C-Series engine

The BMC C-Series was a straight-6 automobile engine produced from 1956 to 1971. Unlike the Austin designed A and B-series engines, it came from the Morris engines drawing office in Coventry. Displacement was 2.6 to 2.9 L (2,912 cc) with an 83.3 mm bore and 88.9 mm stroke.

Applications:

2.6 L (2,639 cc) 77x89 mm
- 1954-1959 Wolseley 6/90
- 1954-1959 Austin Westminster A90/A95/A105
- 1955-1958 Morris Isis
- 1958-1959 Riley Two-Point-Six
- 1956-1959 Austin-Healey 100-6
2.9 L (2,912 cc) 83.36x88.9 mm. Four bearing crankshaft.
- 1959-1968 Austin Westminster A99/A110
- 1959-1968 Wolseley 6/99 and 6/110
- 1959-1964 Vanden Plas Princess 3-Litre
- 1959-1967 Austin-Healey 3000
2.9 L (2,912 cc) 83.36x88.9 mm. Seven bearing crankshaft.
- 1967-1971 Austin 3-Litre
- 1968-1970 MGC

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Technical

BMC C-Series engine Technical details and specifications (1956-1971)

ENGINE: 3.0L (2,912 cc)

front, 4 stroke
cylinders: 6, vertical, in line
bore and stroke: 3.28 x 3.50 in, 83,3 x 88.9 mm
engine capacity: 178.10 cu in, 2912 cu cm
compression ratio: 8.3 : 1
max power (SAE): 126 hp at 4750 rpm
max torque (SAE): 163 1b ft, 22.5 kgm at 2750 rpm
max number of engine rpm: 5600
specific power: 43.3 hp/l
cylinder block: cast iron
cylinder head: cast iron
crankshaft bearings: 4
valves: 2 per cylinder, overhead, in line, with push rods and rockers
camshaft: 1, side
lubrication: gear pump, full flow filter
lubricating system capacity: 6.4 imp qt, 7.7 US qt, 7.3 1
carburation: 2 SU H4 horizontal carburettors
fuel feed: electric pump
cooling system: water

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Service

BMC C-Series engine Service Guide (1956-1971)

ENGINE: 3.0L ( 2,912 cc)

fuel: petrol, 95-98 Oct
engine sump oil: imp qt, 6.5 US qt, 6.2 1, SAE 1OW-20 (winter) 20W-30 (summer), change every 3000 miles, 4800 km
gearbox oil: 2.7 imp qt, 3.3 US qt, 3.1 1, SAE 30W, change every 6000 miles, 9600 km
final drive oil: 1.6 imp qt. 1.9 US qt. 1.8 1, SAE 90
greasing: every 3000 miles, 4800 km, 8 points
tappet clearance: inlet 0.012 in, 0.30 mm hot, exhaust 0.012 in, 0.30 mm hot
valve timing: (inlet) opens 0° before tdc and closes 50° after bdc, (exhaust) opens 35° before bdc and closes 15° after tdc
tyre pressure (medium load): front 26 psi, 1.8 atm, rear 26 psi, 1.8 atm
tyres: 7.00 - 14
fuel tank capacity: 16.00 imp gal, 19.27 US gal, 73 1.
cooling system capacity: 9.5 imp qt, 11.4 US qt, 10.8 1.

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