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Home >> Jaguar >> 2010 >> XFR >> Repair and Diagnosis >> External Pages >> Different car >> Section 130 (Engine Cooling - GTDI 2.0L Petrol -- XF/X250) >> Engine Cooling - GTDI 2.0L Petrol >> Diagnosis And Testing >> Engine Cooling >> Pinpoint Tests >> PINPOINT TEST B: Engine Overheating Tests

PINPOINT TEST B: Engine Overheating Tests

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.
  1. B1: ENGINE OVERHEATING TEST 1 
    • DO NOT  remove the coolant expansion tank cap when the engine is hot. Failure to follow this instruction may result in personal injury.
    • Never, under any circumstances, remove the coolant expansion tank pressure cap while the engine is operating. To avoid having scalding hot water or steam blow out of the cooling system, use extreme care when removing the coolant expansion tank pressure cap from a hot cooling system. Wait until the engine has cooled, then wrap a thick cloth around the coolant expansion tank pressure cap and turn it slowly until the pressure begins to release, step back while the pressure is released from the system. When certain all the pressure has been released (still with a cloth) turn and remove the coolant expansion tank pressure cap. Failure to follow these instructions may result in damage to the cooling system, engine and/or cause personal injury.
    1. Check the coolant level and specific gravity

      Is the coolant level and specific gravity within specification?

      • Yes  : GO to  B2.
      • No  : Refer to the relvent service information and fill and bleed the cooling system as necessary. Check for coolant loss
  2. B2: ENGINE OVERHEATING TEST 2 
    WARNING:
    • DO NOT  remove the coolant expansion tank cap when the engine is hot. Failure to follow this instruction may result in personal injury.
    • Never, under any circumstances, remove the coolant expansion tank pressure cap while the engine is operating. To avoid having scalding hot water or steam blow out of the cooling system, use extreme care when removing the coolant expansion tank pressure cap from a hot cooling system. Wait until the engine has cooled, then wrap a thick cloth around the coolant expansion tank pressure cap and turn it slowly until the pressure begins to release, step back while the pressure is released from the system. When certain all the pressure has been released (still with a cloth) turn and remove the coolant expansion tank pressure cap. Failure to follow these instructions may result in damage to the cooling system, engine and/or cause personal injury.
    1. Remove the coolant expansion tank cap
    2. Use water to clean cap in area of rubber seal and vacuum relief valve
    3. Following manufacturer's instructions, install the coolant expansion tank cap to the pressure tester
      NOTE: If the pressure tester is pressurised too quickly, an erroneous pressure reading may result.
    4. Slowly pressurise the system until the pressure gauge reading stops increasing, and note highest pressure reading obtained
    5. Repeat step  4 at least twice to ensure the pressure test reading is repeatable and within specification

      Are the coolant expansion tank cap relief valve test results within specification?

      • Yes  : GO to Pinpoint Test C .
      • No  : Install a new coolant expansion tank cap
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