Question about 1988 Audi 90

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I have a 1988 Audi 90 the pressure builds up in the cooling system, twice it blew out the freeze plug in the head and this time it blew out all the coolant. any suggestions?

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  • Expert
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If the freeze plugs are correctly installed and proper amount of sealant is used they should never blow off. Try leaving the radiator cap loose while you drive it around (short distance). Then try a new radiator cap .If a new radiator cap doesnt work then there maybe a crack on the head or block blown head gasket that is causing excess pressure

Posted on May 18, 2011

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YOU NEED TO HAVE RADIATOR AND ENGINE FLUSHED OUT.THEN CHANGE RADIATOR PRESSURE CAP AND REPLACE THERMOSTAT.REPLACE ALL RADIATOR HOSES.MAKE WATER PUMP BYPASS HOSE TO HEATER CORE NOT STOPPED UP.

Posted on May 18, 2011

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  • Audi Master
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  • You have to make sure the plug is fitted properly. If it's popping out, it is not because of to much pressure, it's because of improper installation. I see it time and time again. Not cleaning the area and preparing the plug accordingly. rust, corrosion, improper installation all lead to the plugs popping out. If you paid take it to someone who will do it right. If this was a home job I suggest a complete Freeze Plug Installation Kit and clean the plug hole completely with sandpaper and see it fits permanently.

Regards, Tony

Posted on May 18, 2011

  • Iron
    Iron May 18, 2011

    If you have any further questions please feel free to comment right here. Pressure is not a reason the freeze plugs blow.

    Regards,
    Tony

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2002 isuzu rodeo cylinder head torque lbs. for 2.2


Print


Removal & Installation

2.2L Engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2. Drain the cooling system.
  3. Relieve the fuel system pressure.
  4. Remove or disconnect the following: Negative battery cableIntake Air Temperature (IAT) sensor connectorPositive Crankcase Ventilation (PCV) valve and hoseAir intake assemblyUpper radiator hoseAccessory drive beltExhaust front pipeAlternator and bracketsCrankshaft Position (CKP) sensor connectorKnock sensor connectorHeater hosesWater bypass hoseFuel linesEvaporative Emissions (EVAP) valve connectorCanister hoseIntake manifoldEngine wiring harness connectors at left rear of the engine compartmentPower steering pump pressure switch connectorFront coverSpark plugs and wiresCamshaft Position (CMP) sensorValve coverTiming belt. Refer to the Timing Belt unit repair section.Timing belt idler pulleysTiming belt rear coverOil pressure switch connectorCamshaftsCylinder head. Remove the bolts in reverse of the tightening sequence.

    Negative battery cable Intake Air Temperature (IAT) sensor connector Positive Crankcase Ventilation (PCV) valve and hose Air intake assembly Upper radiator hose Accessory drive belt Exhaust front pipe Alternator and brackets Crankshaft Position (CKP) sensor connector Knock sensor connector Heater hoses Water bypass hose Fuel lines Evaporative Emissions (EVAP) valve connector Canister hose Intake manifold Engine wiring harness connectors at left rear of the engine compartment Power steering pump pressure switch connector Front cover Spark plugs and wires Camshaft Position (CMP) sensor Valve cover Timing belt. Refer to the Timing Belt unit repair section. Timing belt idler pulleys Timing belt rear cover Oil pressure switch connector Camshafts Cylinder head. Remove the bolts in reverse of the tightening sequence.

To install:


0996b43f802097a8.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Cylinder head torque sequence-2.2L (VIN D) engine

NOTE Use new cylinder head bolts for assembly.

  1. Install the cylinder head with a new gasket. Tighten the bolts in sequence as follows: Step 1: 18 ft. lbs. (25 Nm)Step 2: Plus 90 degreesStep 3: Plus 90 degreesStep 4: Plus 90 degrees
    1. Step 1: 18 ft. lbs. (25 Nm)
    2. Step 2: Plus 90 degrees
    3. Step 3: Plus 90 degrees
    4. Step 4: Plus 90 degrees

  2. Install or connect the following: CamshaftsOil pressure switch connectorTiming belt rear coverTiming belt idler pulleys. Tighten the bolts to 18 ft. lbs. (25 Nm).Timing beltValve coverCMP sensorSpark plugs and wiresFront coverPower steering pump pressure switch connectorEngine wiring harness connectors at left rear of the engine compartmentIntake manifoldCanister hoseEVAP valve connectorFuel linesWater bypass hoseHeater hosesKnock sensor connectorCKP sensor connectorAlternator and bracketsExhaust front pipeAccessory drive beltUpper radiator hoseAir intake assemblyPCV valve and hoseIAT sensor connectorNegative battery cable

    Camshafts Oil pressure switch connector Timing belt rear cover Timing belt idler pulleys. Tighten the bolts to 18 ft. lbs. (25 Nm). Timing belt Valve cover CMP sensor Spark plugs and wires Front cover Power steering pump pressure switch connector Engine wiring harness connectors at left rear of the engine compartment Intake manifold Canister hose EVAP valve connector Fuel lines Water bypass hose Heater hoses Knock sensor connector CKP sensor connector Alternator and brackets Exhaust front pipe Accessory drive belt Upper radiator hose Air intake assembly PCV valve and hose IAT sensor connector Negative battery cable
  3. Fill the cooling system.
  4. Start the engine and check for leaks.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain the cooling system.
  3. Relieve the fuel system pressure.
  4. Remove or disconnect the following:

    Negative battery cable Intake Air Temperature (IAT) sensor connector Positive Crankcase Ventilation (PCV) valve and hose Air intake assembly Upper radiator hose Accessory drive belt Exhaust front pipe Alternator and brackets Crankshaft Position (CKP) sensor connector Knock sensor connector Heater hoses Water bypass hose Fuel lines Evaporative Emissions (EVAP) valve connector Canister hose Intake manifold Engine wiring harness connectors at left rear of the engine compartment Power steering pump pressure switch connector Front cover Spark plugs and wires Camshaft Position (CMP) sensor Valve cover Timing belt. Refer to the Timing Belt procedure. Timing belt idler pulleys Timing belt rear cover Oil pressure switch connector Camshafts Cylinder head. Remove the bolts in reverse of the tightening sequence.

To install:

0996b43f802097a8.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Cylinder head torque sequence-2.2L (VIN D) engine


NOTE Use new cylinder head bolts for assembly.

  1. Install the cylinder head with a new gasket. Tighten the bolts in sequence as follows:
    1. Step 1: 18 ft. lbs. (25 Nm)
    2. Step 2: Plus 90 degrees
    3. Step 3: Plus 90 degrees
    4. Step 4: Plus 90 degrees

  2. Install or connect the following:

    Camshafts Oil pressure switch connector Timing belt rear cover Timing belt idler pulleys. Tighten the bolts to 18 ft. lbs. (25 Nm). Timing belt Valve cover CMP sensor Spark plugs and wires Front cover Power steering pump pressure switch connector Engine wiring harness connectors at left rear of the engine compartment Intake manifold Canister hose EVAP valve connector Fuel lines Water bypass hose Heater hoses Knock sensor connector CKP sensor connector Alternator and brackets Exhaust front pipe Accessory drive belt Upper radiator hose Air intake assembly PCV valve and hose IAT sensor connector Negative battery cable
  3. Fill the cooling system.
  4. Start the engine and check for leaks.

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