THE FORD SIERRA

COSWORTH TECH INFO












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COSWORTH ENGINE

THANKS TO MOTORCITY FOR THIS INFO:
 

TIGHTENING TORQUES
Remember it is as important to ensure that bolts are not over tightened as under tightened.
Nm lb/ft
OIL DRAIN BUNG INTO SUMP 21-27 16-20
ALTERNATOR TO MOUNTING BRACKET 18-25 14-19
ADJUSTMENT STRAP TO ALTERNATOR 18-25 14-19
ALTERNATOR STRAP TO WATER PUMP 18-25 14-19
TIMING BELT COVER(ALL BOLTS) 8-10 6-8
SECONDARY TO PRIMARY EXHAUST MANIFOLD(2WD) 32-36 24-27
TURBOCHARGER TO MANIFOLD 40-48 30-36
CAM CAP TO CYLINDER HEAD(M6) 8-10 6-8
CAM CAP TO CYLINDER HEAD(M8) 12-23 9-17
CAM PULLEY TO CAMSHAFT 59-63 44-47
CAMBELT TENSIONER RETAINING NUT 40-48 30-36
CRANKSHAFT PULLEY TO CRANKSHAFT 122-135 92-101
CAM COVER BOLTS 10-15 8-11
CYLINDER HEAD(STRETCH BOLTS)
  • STAGE 1
  • STAGE 2
  • STAGE 3
  • STAGE 4
    		•
    20-25
    45-50
    +90deg
    +90deg
    15-19
    34-38


    CHECK TORQUE(IF BOLTS TURN-REPLACE THEM) 110 83
    SPARK PLUG TO CYLINDER HEAD(LUBRICATE THREADS) 28-33 21-25
    WHEEL NUTS 100 75

    TYRE PRESSURES

    FRONT REAR USE
    SIERRA COSWORTH
    205/50 VR 15 2.1 BAR(31 PSI) 2.3 BAR(34 PSI) Normal load & speed
    2.3 BAR(34 PSI) 2.5 BAR(37 PSI) Heavy load, Normal speed
    205/50 VR 15 2.3 BAR(34 PSI) 2.5 BAR(37 PSI) Normal load, High speed
    2.6 BAR(38 PSI) 3.0 BAR(44 PSI) Heavy load, High speed
    ESCORT COSWORTH
    225/45 ZR 16 2.0 BAR(29 PSI) 2.2 BAR(32 PSI) Normal load & speed
    2.2 BAR(32 PSI) 2.4 BAR(35 PSI) Heavy load, Normal speed
    2.2 BAR(32 PSI) 2.4 BAR(35 PSI) Normal load, High speed
    2.5 BAR(37 PSI) 2.9 BAR(43 PSI) Heavy load, High speed

    T125/80 R16 97M Emergency spare tyre - 4.2 BAR (62 PSI)

    LUBRICATION RECOMMENDATIONS

    GEARBOX(2WD) AUTOMATIC TRANSMISSION FLUID 2.55 LTRS(0-5mm BELOW PLUG)
    GEARBOX(4x4) 75/90W SEMI/FULLY SYNTHETIC 1.2 LTRS(0-5mm BELOW PLUG)
    TRANSFER BOX(4x4) 75/90W SEMI/FULLY SYNTHETIC 0.5 LTRS(18mm BELOW PLUG)
    ENGINE OIL FULLY SYNTHETIC ENGINE OIL NOMINAL CAPACITY 4 LTRS(3-6mm BELOW TOP MARK ON DIPSTICK)

    BRAKE DISC DETAILS

    ORIGINAL THICKNESS MINIMUM THICKNESS
    2 WHEEL DRIVE FRONT 283mm DIAMETER 24.15mm 22.8mm
    2 WHEEL DRIVE REAR 273mm DIAMETER 10.3mm 8.9mm
    4 WHEEL FRONT 278mm DIAMETER 24.15mm 22.8mm
    4 WHEEL REAR 273mm DIAMETER 20.00mm 18.0mm































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