Technical information

Rover SD1 6 cylinder Specifications.

6 Cylinder Engine    
Compression Pressure 11.6-12.3 bar 165-175 Lb/in2
Spark PlugsTypes Unipart GSP 331 Champion BN9Y
Spark Plug Gap 0.63mm 0.025 in
Firing Order 1-5-3-6-4-2  
Number 1 Cylinder at front of engine  
Distributor Rotor Direction Anti-Clockwise  
Timing Marks Scale on timing cover notch on crankshaft pulley
Contact breaker points gap 0.35mm 0.014in
Dwell angle pre 1982 34 degrees +/- 5degrees  
Dwell angle 1982 on 37 degrees +/- 5degrees  
Ignition Timing - Static   10 degrees BTDC
Ignition Timing - 800rpm vacuum disconnected 10 degrees BTDC
Ignition Timing - 2300 - 1982 on 2500 rpm vacuum disconnected 24 Degrees BTDC
Ignition Timing - 2360 - 1982 on 2500 rpm vacuum disconnected 20 Degrees BTDC
Idle speed 750 to 850 rpm  
CO level at idle pre 1982 0 - 4.5%  
CO level at idle 1982 on 3%  

 

6 Cylinder Engine (2300)    
     
Displacement 2350  
     
  mm in
Bore 81 3.189
Stroke 76 2.992
     
Compression Ratio 9.25:1  

 

6 Cylinder Engine (2600)    
     
Displacement 2597  
     
  mm in
Bore 81 3.189
Stroke 84 3.307
     
Compression Ratio 9.25:1  

 

Cylinder Head    
     
Material Aluminium  
Valve Face Angle 45 degrees  
     
  mm in
Valve Clearance (inlet and Exhaust) 0.457 0.018
Valve Spring free Height (inner exhaust) 36.07 1.42
Valve Spring free Height (outer) 41.15 1.62
Valve Stem to Guide Clearance (Inlet) 0.03-0.05 0.0012-0.0019
Valve Stem to Guide Clearance (Exhaust) 0.05-0.06 0.0019-0.0024
Tappet Clearance in Carrier 0.02-0.045 0.0008-0.002
     
Camshaft Running Clearance 0.050-0.090 0.002-0.003
Camshaft End Float 0.050-0.144 0.002-0.006
     
Oil Pump Outer rotor to inner 0.025-0.203 0.001-0.008
Oil Pump rotor to body 0.102-0.178 0.004-0.007
Oil Pump Rotors to cover plate 0.025-0.076 0.001-0.003
     
Crankshaft endfloat 0.076-0.279 0.003-0.011
Crankshaft spigot bush clearance - manual 0.014-0.051 0.0006-0.0020
Crankshaft bush clearance - auto 0.010-0.018 0.0004-0.0007
Crankshaft maximum main bearing wear before grind 0.0508-0.0635 0.002-0.0025
     
Pistons, Rings and Conrods    
     

 

Pistons, Rings and Conrods    
  mm in
Piston Clearance in cylinder (above rings) 0.450-0.613 0.0177-0.024
Piston Clearance in cylinder (skirt bottom) 0.012-0.038 0.0005-0.013
Big end running clearance 0.068-0.025 0.0027-0.001
Conrod end play 0.16-0.34 0.005-0.013
Piston pin clearance (In Conrod) 0.007-0.010 0.0003-0.0004
Piston pin clearance (In Piston) 0.067-0.097 0.0003-0.0004
     
Piston Ring Gaps    
     
Oil Control Ring 0.38-1.4 0.015-0.055
Second Compression Ring 0.23-0.36 0.009-0.014
Top Compression Ring 0.33-0.46 0.013-0.018
Compression Ring to Grooves 0.050-0.082 0.0019-0.0032

 

Tightening Torques    
  Nm Lb ft
Clylinder head to Block    
     
New gasket 130 96
Tightening old gasket 102 75
Main bearing Cap Bolts 102 75
Big End Cap Bolts 60 44
     
General    
     
Camshaft Carrier to Head 50 37
Camshaft Cover Screws 10 7
Belt Tensioner to head 28 21
Crankshaft Pulley Bolt 200 147
Crankshaft drive Pulley 50 37
Exhaust manifold to head 40 30
Inlet manifold to head 28 21
Flywheel/drive plate to crank 70 52
Oil Filter to Flange 14 10
Oil Pump to Block 28 21
Oil Pipe to pump 10 7
Oil Pipe to Block 28 21
Sump Drain Plug 40 30
Sump to Block 14 10
Rear Oil Seal Housing 28 21
Rocker Shaft locating Screw 6 4
     
Engine Mounting Brackets    
Front Lower Mounting 67 50
Front Upper Mounting 24 18
Mountings to Brackets 54 40
Mountings to Crossmembers 54 40

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