Info
British Leyland Rover S-Series engine
The S-Series is a Straight-4 SOHC internal combustion engine developed by the Austin Rover Group (subsidiary of British Leyland), and introduced in 1984 in both the Austin Montego and the Mark 1 Rover 200-series.The S-Series was produced in a single capacity of 1.6 litres (1,598cc)
The MG Maestro also from MAY to September 1984,with VW box. It was also used in the Austin Maestro from 1985 onwards.
The engine comes from the same lineage as the BMC-developed E-Series family introduced in the 1969 Austin Maxi, but with important modifications in order to facilitate compatibility with a conventional "end-on" transmission unit, in place of BMC/BL's traditional "gearbox-in-sump" configuration for its front wheel drive vehicles. The gearbox flange was redesigned to accept either a Volkswagen manual gearbox (for the Maestro/Montego), or the Honda PG-1 transmission (for the Rover 200).
BL had also developed the earlier R-Series engine from the E-Series family, but largely as a stopgap at the Maestro's launch since the S-Series was not yet ready for production. Because the E-Series had to be turned through 180 degrees in order to facilitate an end-on transmission, the resultant R-Series unit had the inlet manifold on the front-facing side of the cylinder head, something which proved fatal for the engine's reliability—since it opened the door for carburettor icing. The S-Series solved this problem, as the inlet manifold was now on the rear face of the engine. Another important advance over the E-/R-Series was the adoption of a camshaft driven by a toothed belt in place of the previous timing chain system.
Production of the S-Series engine continued until the end of Montego / Maestro series production in 1993, the remaining cars which were built by Rover until 1994 used only the O-Series diesel engine.
A 4-valve version of the S-Series was under development alongside the 1100 cc and 1400 cc K-Series engines. However, the project was abandoned when a redesign of the K-Series allowed its capacity to be stretched to 1600 cc and 1800 cc. The engine was designated the name L16 but should not be confused with the L Series diesel engines
Technical
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BL Rover S-Series engine Technical details and specifications (1984-1994)
BL Rover 1.6 L
No. of cylinders 4/OHC
Capacity 1598cc
Firing order 1-3-4-2
Compression ratio 9.6:1
Suitable for unleaded petrol No
Fuel system Make SU Type HIF 44
Diagnostic socket No
Ignition coil Make Unipart Type GCL 139
Distributor Make Lucas AB17-84185
Fuel system pressure 0.3 bar
Oil pressure 3.8 bar @ 3000 rpm
Thermostat opens 88°C
Alternator Make Lucas Type A133/127
Starter motor Make Lucas Type 9M90
Maximum cranking amps 116-142A
Regulated voltage 13.6-14.4V© Motor car History
Service
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BL Rover S-Series engine Service Guide (1984-1994)
BL Rover 1.6 L
Spark plugs Electrode gap 0.8-1.0mm
Spark plugs Tighten 18 Nm
Spark plugs Original equipment Unipart GSP665
Spark plugs Make Bosch F7DC
Spark plugs Make NGK BCP6ES
Valve clearance -INLET 0.35-0.38 mm check cold
Valve clearance -EXHAUST 0.43-0.46 mm check cold
Drive belt tension - alternator 4-8mm
Engine oil grade - normal/moderate climate 10W/40 SAE or 10W/30 SAE
Engine oil grade - cold climate 5W/40 SAE
Engine oil grade - hot climate 15W/50 SAE
Engine oil change 3.8 litres
Sump drain bolt Tighten 25 Nm
Manual gearbox oil grade 75W/80W SAE
Manual gearbox oil 4 speed 1.5 litres/5 speed 2.0 litres
Automatic transmission fluid Type Dexron II
Automatic transmission fluid 2.25 litres
Cooling system 8.5 litres© Motor car History
Maintenance
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