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Thread: Z20NET Spec Sheet

  1. #1
    Regular Member Jezzy's Avatar
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    Default Z20NET Spec Sheet

    Because I can do a good impression of a geek, and because I like my engine, I've drawn up what I hope will become a sticky once it's finished, and act as a reference guide to the Z20NET for forum members.

    At the moment it consists of a picture of the engine, some facts and figures, and BHP and torque curves.

    Please feel free to point out any inaccuracies, and make suggestions for additional information that should be included, and if you also have that information to hand, so much the better.







    Engine designation:


    Vauxhall:
    Z20NET (Z = Euro4 emissions standard, 20 = 2.0 litre, N = compression ratio 9.0-9.5:1, E = injection, T = turbocharged)
    Saab:
    B207L


    Engine installation
    Front, transverse in front of axle, 10° backward inclined

    Cooling system
    Liquid, sealed circuit

    Cylinders, number
    4

    No 1 cylinder location
    At timing chain end

    Bore (mm)
    86

    Stroke (mm)
    86

    Displacement (cc)
    1998

    Compression ratio
    9.5 : 1

    Engine, type
    In line; 5 main bearings

    Cylinder block/ head material
    Aluminium/ aluminium

    Camshaft(s), location
    2 overhead (DOHC), driven by chain

    Valve train
    Roller rocker with hydraulic bucket tappets

    Valve, arrangement
    v; 4 per cylinder

    Valve, adjustment
    Automatic – hydraulic

    Fuel system
    Sequential multi point fuel injection

    Ignition system
    Electronic ignition map, ignition coil direct to spark plug

    Fuel pump
    Electric, in tank

    Emission control system
    3 - way cat. conv. with 2 oxygen sensors

    Output
    129 kW / 175 BHP at 5500 RPM

    Specific power (kW/l; hp/l)
    64.6; 87.6

    Max. torque (Nm at 1/min)
    265 kW / 195 lb ft at 2500 RPM

    Specific torque (Nm/litre)
    132.6

    Mean effective pressure at max. power/ max. torque (Nm/litre)
    1408.7/ 1667.5

    Average piston speed (m/s)
    15.8

    Number of camshaft bearings
    6 per camshaft


    Lubrication:

    Engine oil, capacity (l)
    6

    Difference between Min and Max markings on dipstick
    1 litre

    Oil filter type
    Disposable paper cartridge, top mounted

    Oil filter nut size
    32mm

    Oil filter nut torque setting
    25 Nm / 18 lb ft

    Sump drain plug torque setting
    25 Nm / 18 lb ft

    Minimum oil pressure at 80 C:
    Crankcase
    2.0 bar at 1000 RPM

    Cylinder head
    0.8 bar at 1000 RPM

    Oil pressure warning switch activates at
    0.3 bar

    Oil cooler thermostat opens at
    107 C (No thermostat fitted from 2008 onwards - oil cooling at all temperatures)


    Coolant capacity (l)
    7.5

    Battery 12V, capacity (Ah)
    66

    Alternator 14.2V, capacity (W)
    1704

    Max. service interval
    20,000 miles or 2 years

    Emission compliance
    Euro 4

    OEM spark plug brand/type
    NGK PFR6T-10G

    Electrode gap
    0.9mm to 1.0mm

    Spark plug torque setting
    28 Nm / 21 lb ft

    Firing order
    1-3-4-2.





  2. #2
    Regular Member Jezzy's Avatar
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    Default

    First revision is complete, I've added part numbers for some commonly replaced parts specific to this engine, some more diagrams of the engine and labelled some of the major components. As before, suggestions/revisions welcome.





    Engine designation:


    Vauxhall:
    Z20NET (Z = Euro4 emissions standard, 20 = 2.0 litre, N = compression ratio 9.0-9.5:1, E = injection, T = turbocharged)
    Saab:
    B207L


    Engine installation
    Front, transverse in front of axle, 10° backward inclined

    Cooling system
    Liquid, sealed circuit

    Cylinders, number
    4

    No 1 cylinder location
    At timing chain end

    Bore (mm)
    86

    Stroke (mm)
    86

    Displacement (cc)
    1998

    Compression ratio
    9.5 : 1

    Engine, type
    In line; 5 main bearings

    Cylinder block/ head material
    Aluminium/ aluminium

    Camshaft(s), location
    2 overhead (DOHC), driven by chain

    Valve train
    Roller rocker with hydraulic bucket tappets

    Valve, arrangement
    v; 4 per cylinder

    Valve, adjustment
    Automatic – hydraulic

    Turbocharger
    Garrett GT 2052S

    Fuel system
    Sequential multi point fuel injection

    Ignition system
    Electronic ignition map, ignition coil direct to spark plug

    Fuel pump
    Electric, in tank

    Emission control system
    3 - way cat. conv. with 2 oxygen sensors

    Output
    129 kW / 175 BHP at 5500 RPM

    Specific power (kW/l; hp/l)
    64.6; 87.6

    Max. torque (Nm at 1/min)
    265 kW / 195 lb ft at 2500 RPM

    Specific torque (Nm/litre)
    132.6

    Mean effective pressure at max. power/ max. torque (Nm/litre)
    1408.7/ 1667.5

    Average piston speed (m/s)
    15.8

    Number of camshaft bearings
    6 per camshaft


    Lubrication:

    Engine oil, capacity (l)

    6

    Difference between Min and Max markings on dipstick
    1 litre

    Oil filter type
    Disposable paper cartridge, top mounted

    Oil filter nut size
    32mm

    Oil filter nut torque setting
    25 Nm / 18 lb ft

    Sump drain plug torque setting
    25 Nm / 18 lb ft

    Minimum oil pressure at 80 C:
    Crankcase
    2.0 bar at 1000 RPM

    Cylinder head
    0.8 bar at 1000 RPM

    Oil pressure warning switch activates at
    0.3 bar

    Oil cooler thermostat begins to open at
    107 C, fully open at 120 C (No thermostat fitted from 2008 onwards - oil cooling at all temperatures)


    Coolant capacity (l)
    7.5

    Battery 12V, capacity (Ah)
    66

    Alternator 14.2V, capacity (W)
    1704

    Max. service interval
    20,000 miles or 2 years

    Emission compliance
    Euro 4

    OEM spark plug brand/type
    NGK PFR6T-10G

    Electrode gap
    0.9mm to 1.0mm

    Spark plug torque setting
    28 Nm / 21 lb ft

    Firing order
    1-3-4-2.


    Commonly replaced parts
    Charged air bypass valve, Vauxhall part number 55354158
    Oil filter element, 93175493
    O-ring seal for oil filter, 90537437
    Mass air flow sensor, 24452491
    Thermostat and flange, 90537811




    Engine from the front:





    Engine from the rear:





    Component location:



    Key:
    1 Air box
    2 Brake fluid reservoir
    3 Coolant reservoir
    4 Mass air flow sensor
    5 Spark plugs and ignition coils cover
    6 Turbocharger heat shield
    7 Oil cooler
    8 Air conditioning low pressure pipe valve
    9 Coolant return pipe ventilation valve
    10 Fuel rail de-pressurising valve
    11 Alternator
    12 Charged air boost control valve





  3. #3
    Regular Member sy_uk's Avatar
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    Default

    Maybe a sticky for veccy/siggy engines, then inside that post links to each engines own "non-stickied" thread?

  4. #4
    Ex Vec-C Admin Deztroyer's Avatar
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    Default

    sticky created

    0-Large smile ......every time it's driven

  5. #5
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    Default

    Jezzy,

    additional component for Tubo solenoid

    looks identical to the charged bypass valve that so many of us have fitted and works in tandem with it - do not confuse them as they do have different reference values and will not effectively work if reversed

    Vauxhall part no 12787706 description "valve"

    location as per your picture of the engine with the cover removed ..
    located above the dipstick with 3 pipes and electrical connector coming out of the unit .

    my advice is if your fitting "Charged air bypass valve, Vauxhall part number 55354158" you fit this one as well - belt and braces but for around a tenner might save you an additional trip to the dealers

    regards

    Dez

    0-Large smile ......every time it's driven

  6. #6
    Regular Member Jezzy's Avatar
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    Default

    Pictures of the rarely seen turbo side of the Z20NET:






  7. #7
    Regular Member Jezzy's Avatar
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    Default

    Air/fuel flow diagram (not to scale), from Saab:





    KEY

    1. Check valve, crankcase ventilation
    2. Air filter
    3. Mass air flow sensor (MAF)
    4. Turbo
    5. Charge air cooler
    6. By-pass valve
    7. Solenoid valve, turbo by-pass
    8. Throttle body actuator
    9. Intake air temperature sensor
    10. Manifold absolute pressure sensor
    11. Engine
    12. Crankcase ventilation, oil trap
    13. Check valves
    14. EVAP canister purge valve
    15. Evaporative emission canister
    16. Wastegate valve
    17. Charge air regulator
    18. Boost pressure control valve
    19. Oxygen sensor
    20. Catalytic convertor
    21. Exhaust temperature sensor
    22. Front silencer
    23. Rear silencer
    24. Vacuum pump
    25. Brake servo
    26. Check valve
    27. Fuel pressure regulator
    28. Atmospheric pressure sensor

  8. #8
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    Default

    whats the part that bolts on the side of the cam cover at the side round shape thing ??

  9. #9
    Regular Member Jezzy's Avatar
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    Default

    This one?




    That's the vacuum pump.

  10. #10
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    Default

    yes mate that's it, should it make a tapping rattle clicking sound??

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