Ford Probe, Mazda 626 & MX6 FAQ


B) Sourcing Components & Regular Maintenance


Torque Specs & Useful Technical Data

Torque Specs
    Ignition Area:
    Distributor Cap torque bolts - 19-25Nm, 14-18lb/ft.
    Spark Plug Torque - 15-22Nm, 11-16lb/ft with engine cold (hot aluminium tears)

    Exhaust Area
    Exhaust stud tightening torque - 2.5V6 - 19-25Nm, 14-18lb/ft in 2-3 steps
    Exhaust stud tightening torque - 2.0I4 - 20-28Nm, 14-18lb/ft (Nut), 16-22Nm, 12-16lb/ft) (Bolt) in 2-3 steps

    Coolant Area
    Block Drain, right side of 2.5V6 engine - 19-25Nm, 14-18lb/ft
    Thermostat bolt 19-25Nm, 14-18lb/ft
    Water (Fan) Thermosensor - 16-23Nm, 12-17lb/ft

    Oil Area
    Oil Pressure Sender - 11.8-17.7Nm
    Oil Filter Torque - 14-17Nm
    Oil Pan Drain Plug - Nm
    MTX Drain & Fill Plug - 40-58Nm, 29-43lb/ft

    Airbox Area
    Fresh Air Duct across radiator - 7.8-10.7Nm; 10mm skt
    Airbox bolts & nuts - 19-25Nm, 14-18lb/ft; 12mm skt

    Seat Belt Area
    Seat Belt Anchoring Points - 38-54Nm, 28.2-29.8lb/ft

    Wheel Area
    Wheel lug nut - 89-117Nm, 66-87lb/ft
    Front & Rear Suspension Strut Bottom Two Cross Bolts - 94-116Nm, 69-86lb/ft; 19mm skt
    Front & Rear Antiroll Bar Linkage Nuts & Bracket Nuts/Bolts - 37-53Nm, 27-39lb/ft
    Front & Rear ABS Sensor lead strut bracket - 16-22Nm, 12-16lb/ft
    Front Calliper Guide bolts - 44-49Nm, 33-36lb/ft
    Rear Calliper Guide bolts - 34-39Nm, 25-29lb/ft
    Front Calliper Bracket bolts - 78-102Nm, 58-74lb/ft
    Rear Calliper Bracket bolts - 45-67Nm, 33-49lb/ft
    Front & Rear Calliper Bleed Screw - 6.9-9.8Nm
    Front Tie-Rod End to Tie-Rod - 69-98Nm, 51-72lb/ft
    Front Tie-Rod End (Cotter Pin locked) - 31-44Nm, 23-33lb/ft
    Flexible Brake Line to Fixed Brake Line - 12.8-21.5Nm
    Front & Rear Flexible Brake Line to Calliper - 22-29Nm, 16-22lb/ft
    Front & Rear Strut-Top nuts - 46-63Nm, 34-46lb/ft
    Steering Wheel Centre Lock Nut - 39-49Nm, 29-36lb/ft
    Steering Rack Mount Bushings (Type I & II) - 36-54Nm, 27-40lb/ft

Technical Data
    Ignition Area:
    Spark-plug gap: 1.0-1.1mm on 2.0 & 2.5
    Spark plugs - 2.5: NGK ZFR5F-11 (standard), NGK ZFR6F-11 (for UK & USA)
    Spark plugs - 2.0: NGK BKR5E-11 (standard), NGK BKR6E-11 (for UK & USA)
    Ignition Timing - 2.5V6 - 10 +/- 1 degree; ECU modifies between 6-8o degrees.
    Ignition Timing - 2.0I4 - 12 +/- 1 degree, not ECU modified (no knock sensor)

    Cooling System Area:
    Coolant Capacity - 2.5V6 - 7.5litres
    Coolant Capacity - 2.0I4 - 7.0litres
    Thermostat 2.0I4 & 2.5V6 - Initial-opening 80-84oC, full-open 95oC, full-open lift 8.5mm Fan operation temperature 2.0I4 - Approximately 97oC at the radiator cap filler neck
    Fan operation temperature 2.5V6 - Approximately 100oC at the radiator cap filler neck
    Fan Motor - 2.0I4 - MTX Single Speed, 5.8-7.6Amps, ATX Two Speed, 8.0-14.0Amps; 11.5-17.5Amps
    Fan Motor - 2.5V6 - MTX Two Speed, 8.0-14.0Amps & 11.5-17.5Amps, ATX Two Speed, 7.9-13.9Amps & 13.2-19.2Amps
    Water (Fan) Thermosensor - 2.0I4 - 91oC 1.70-1.84Kohm; 97oC 1.42-1.53Kohm; 108oC 1.03-1.11Kohm
    Water (Fan) Thermosensor - 2.5V6 - 91oC 1.70-1.84Kohm; 97oC 1.42-1.53Kohm; 108oC 1.03-1.11Kohm

    Oil System Area
    Oil Capacity - 2.5V6 - Engine+Filter 4.0litres
    Oil Capacity - 2.0I4 - Engine+Filter 3.5litres
    Oil Dipstick L to F mark represents 1-litre
    Oil Pressure Specs - 2.5V6 - 28psi @1000rpm, 49-71psi @3000rpm
    Oil Pressure Specs - 2.0I4 - 57-71psi @3000rpm
    HLA Wear Limit - 0.18mm, replace at 0.15mm (feeler guage between slowly-rotated cam & HLA)
    MTX Oil Capacity - 2.7litres

    General Specs 2.5V6
    Valve Timing - Intake - Open BTDC - 8 degrees, Close ABDC - 50 degrees
    Valve Timing - Exhaust - Open BBDC - 54 degrees, Close ATDC - 8 degrees
    Bore & Stroke - 84.5mmx74.2mm, 3.33"x2.92"
    Spec Compression - 9.2:1; pressure 203psi at 250rpm, min 142psi at 250rpm
    Throttle Body - 2.5V6 - 60mm dia
    Variable Resonance Induction System, VRIS
    Engine Speed 0-3250 3250-4250 4250-6250 6250-7500rpm
    Shutter #1 Closed Open Open Closed
    Shutter #2 Closed Closed Open Closed

    General Specs 2.0I4
    Valve Timing - Intake - Open BTDC - 8 degrees, Close ABDC - 47 degrees
    Valve Timing - Exhaust - Open BBDC - 50 degrees, Close ATDC - 5 degrees
    Bore & Stroke - 83mmx92mm, 3.27"x3.62"
    Spec Compression - 9.0:1; pressure 171psi at 300rpm, min 119psi at 300rpm
    Throttle Body - 2.0I4 - 55mm dia

    Fuel System Area:
    Fuel Pressure Regulator - 2.0I4 - 37-36psi
    Fuel Pressure Regulator - 2.5V6 - 41psi
    Max Pump Pressure - 2.5V6 - 72-92psi
    Max Pump Pressure - 2.0I4 - 64-85psi
    Injector Resistance - 2.0I4 - 12-16 Ohms at 20oC
    Injector Resistance - 2.5V6 - 12-16 Ohms at 20oC

    Power Steering Area:
    Power Steering Fluid - ATF Dexron-II or M-III
    Steering Wheel Free Play - 0-30mm

    Front Brakes
    Master Cylinder i.d. 23.81mm, 0.937"
    Front Disc - Cylinder Bore - 57.15mm, 2.250"
    Front Disc - Pad Dimensions - 4800mm^2 & 10mm thick
    Front Disc - Dimensions - 258mm x 24mm (Probe/MX6 can be 264mm)
    Rear Disc - Cylinder Bore - 30.16mm, 1.187"
    Rear Disc - Pad Dimensions - 2900mm^2 & 8mm thick
    Rear Disc - Dimensions - 261mm x 10mm
    Power Brake Unit - MTX - 239mm, 9.4"; ATX - 188+215mm, 7.4+8.5"
    Brake Pedal Lever ratio - 4.1, Max Stroke 125mm, 4.92"

    Tyre Rotation - 6200 miles
    Wheel Imbalance - max at wheel edge on 15" wheel - 9 grammes

    Manual Gearbox Ratios
    94 UK 626V6-2.594 UK 626I4-2.094 UK 626I4-1.8
    1st - 3.3071st - 3.3071st - 3.307
    2nd - 1.8332nd - 1.8332nd - 1.833
    3rd - 1.3103rd - 1.2333rd - 1.233
    4th - 1.0304th - 0.9144th - 0.914
    5th - 0.7955th - 0.7175th - 0.717
    Rev - 3.166Rev - 3.166Rev - 3.166
    Fin - 4.105Fin - 4.105Fin - 3.850

    In reality the 1993 cars are probably different in final drive & cam profile, as 1993 V6s had a tendency to put too much torque bias to the left-front. Even later cars still exhibit this tendency, torque steer should be neglidgible however.

    Alignment
    Front Wheel Alignment - Toe-in - 3mm +/-3mm
    Front Wheel Alignment - Camber - MX6: -0o42' +/- 45'; 626: -0o36' +/- 45'
    Front Wheel Alignment - Caster - MX6: 3o01' +/- 45'; 626: 2o37' +/- 45'
    Front Left/Right differences - Camber: 30' max, Caster: 45' max
    Rear Wheel Alignment - Toe-in - 3mm +/-3mm
    Rear Wheel Alignment - Thrust Angle - 0o +/- 0.1o

VRIS System

    RPM 0-3250 3250-4250 4250-6250 6250-7500
    VRIS#1 Closed Open Open Closed
    VRIS#2 Closed Closed Open Closed



Ford Probe, Mazda 626 & MX6 FAQ

Last Upload: 31st January, 2002. V1.50a
URL: http://homepage.ntlworld.com/dorothy.bradbury/probemx/p_m14.htm