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Leaking green fluid by the back tires

Green rear coolant leakage

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Things to test when checking cooling system


<p>A leak detection additive is available through the parts department that can be added to cooling system. The additive is highly visible under ultraviolet light (black light) (1). Pour one ounce of additive into cooling system. Place heater control unit in HEAT position. Start and operate engine until the radiator upper hose is warm to touch. Aim the commercially available black light tool at components to be checked. If leaks are present, black light will cause the additive to glow a bright green color.<br /> <p>The black light can be used in conjunction with a pressure tester to determine if any external leaks exist .<br /> <p><b>PRESSURE TESTER METHOD</b><br />he engine should be at normal operating temperature. Recheck the system cold if the cause of coolant loss is not located during the warm engine examination. <br /> WARNING <p> HOT, PRESSURIZED COOLANT CAN CAUSE INJURY BY SCALDING.<br /> <p>Carefully remove the radiator pressure cap from the filler neck and check coolant level. Push down on cap to disengage it from the stop tabs. Wipe the inside of filler neck and examine the lower inside sealing seat for nicks, cracks, paint, dirt and solder residue. Inspect the radiator-to- reserve/overflow tank hose for internal obstructions. Insert a wire through the hose to be sure it is not obstructed.<br /> <p>Inspect cams on the outside of filler neck. If the cams are damaged, seating of the pressure cap valve and tester seal will be affected.<br /> <p>Attach pressure tester (7700 or an equivalent) to radiator filler neck (1).<br /> <p>Operate tester pump to apply 103.4 kPa (15 psi) pressure to system. If hoses enlarge excessively or bulge while testing, replace as necessary. Observe the gauge pointer and determine the condition of the cooling system according to the following criteria:<br /> <p><b>Holds Steady:</b> If the pointer remains steady for two minutes, serious coolant leaks are not present in system. However, there could be an internal leak that does not appear with normal system test pressure. If it is certain that coolant is being lost and leaks cannot be detected, inspect for interior leakage or perform Internal Leakage Test. Refer to <a>INTERNAL LEAKAGE INSPECTION</a>.<br /> <p><b>Drops Slowly:</b> Indicates a small leak or seepage is occurring. Examine all connections for seepage or slight leakage with a flashlight. Inspect radiator, hoses, gasket edges and heater. Seal small leak holes with a Sealer Lubricant (or equivalent). Repair leak holes and inspect system again with pressure applied.<br /> <p><b>Drops Quickly:</b> Indicates that serious leakage is occurring. Examine system for external leakage. If leaks are not visible, inspect for internal leakage. Large radiator leak holes should be repaired by a reputable radiator repair shop.<br /> <a></a> <p><b>INTERNAL LEAKAGE INSPECTION</b><br /> <p>Remove engine oil pan drain plug and drain a small amount of engine oil. If coolant is present in the pan, it will drain first because it is heavier than oil. An alternative method is to operate engine for a short period to churn the oil. After this is done, remove engine dipstick and inspect for water globules. Also inspect the transmission dipstick for water globules and the transmission fluid cooler for leakage.<br /> <br /> WARNING <p> WITH RADIATOR PRESSURE TESTER TOOL INSTALLED ON RADIATOR, DO NOT ALLOW PRESSURE TO EXCEED 145 KPA (21 PSI). PRESSURE WILL BUILD UP QUICKLY IF A COMBUSTION LEAK IS PRESENT. TO RELEASE PRESSURE, ROCK TESTER FROM SIDE TO SIDE. WHEN REMOVING TESTER, DO NOT TURN TESTER MORE THAN 1/2 TURN IF SYSTEM IS UNDER PRESSURE.<br /> <p>Operate the engine without the pressure cap on the radiator until the thermostat opens. Attach a Pressure Tester to filler neck. If pressure builds up quickly it indicates a combustion leak exists. This is usually the result of a cylinder head gasket leak or crack in engine. Repair as necessary.<br /> <p>If there is not an immediate pressure increase, pump the Pressure Tester. Do this until indicated pressure is within system range of 110 kPa (16 psi). Fluctuation of gauge pointer indicates compression or combustion leakage into cooling system.<br /> <p>Because the vehicle is equipped with a catalytic converter, <b>do not</b> remove spark plug cables or short out cylinders to isolate compression leak.<br /> <p>If the needle on the dial of pressure tester does not fluctuate, race engine a few times to check for an abnormal amount of coolant or steam. This would be emitting from exhaust pipe. Coolant or steam from exhaust pipe may indicate a faulty cylinder head gasket, cracked engine cylinder block or cylinder head.<br /> <p>A convenient check for exhaust gas leakage into cooling system is provided by a commercially available Block Leak Check tool. Follow manufacturers instructions when using this product.<br /> <p><b>COMBUSTION LEAKAGE TEST - WITHOUT PRESSURE TESTER</b><br /> <p>DO NOT WASTE reusable coolant. If the solution is clean, drain the coolant into a clean container for reuse.<br /> <br /> WARNING <p> DO NOT REMOVE CYLINDER BLOCK DRAIN PLUGS OR LOOSEN RADIATOR DRAINCOCK WITH SYSTEM HOT AND UNDER PRESSURE. SERIOUS BURNS FROM COOLANT CAN OCCUR.<br /> <p>Drain sufficient coolant to allow thermostat removal(Refer to 7 - COOLING - STANDARD PROCEDURE). Remove accessory drive belt or (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL).<br /> <p>Add coolant to radiator to bring level to within 6.3 mm (1/4 in) of the top of the thermostat housing.<br /> <br /> CAUTION <p> Avoid overheating. Do not operate engine for an excessive period of time. Open draincock immediately after test to eliminate boil over.<br /> <p>Start engine and accelerate rapidly three times, to approximately 3000 rpm while observing coolant. If internal engine combustion gases are leaking into cooling system, bubbles will appear in coolant. If bubbles do not appear, internal combustion gas leakage is not present.

on Jan 20, 2011 | Subaru Legacy Cars & Trucks

1 Answer

Antifreeze leakage


ADD TEST EQUIPMENT,PRESSURE TEST SYSTEM & VISUALLY INSPECT FOR LEAK(s)
PRESSURE TEST RADIATOR/EXPANSION TANK CAP,
INSPECT COOLANT & HEATER HOSES,
INSPECT BYPASS/MISC. COOLANT HOSES/PIPES,

If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_2f0886b7d6af32ce

Feb 07, 2014 | 1999 GMC Sierra

1 Answer

The temperature gauge symbol has started flashing - my car is a 2006 VW Golf S FSI. What are the reasons for this? The actual temperature reads as 90 C


this coolant level indicator add coolant S.W off and on . check coolant leakage from radiator there is thermo S.W sender little leakage re tigh . keep coolant on level .

Jul 13, 2011 | Volkswagen Golf Cars & Trucks

1 Answer

How to replace heate core 1988 buick reagal


REMOVE OR DISCONNECT
  1. Negative battery cable.
  2. Drain cooling system.
  3. Upper firewall weatherstrip.
  4. Upper secondary cowl.
  5. Heater hoses from core.
NOTE Blowing out residual coolant from inside the heater core will prevent coolant leakage into the passenger compartment when the heater core is removed.


  1. Sound insulator.
  2. Rear seat duct adapter.
  3. Heater duct.
  4. Heater core cover.
  5. Heater core.
INSTALL OR CONNECT

  1. Heater core.
  2. Heater core cover.
  3. Heater duct.
  4. Rear seat duct adapter.
  5. Sound Insulator.
  6. Heater hoses to core.
  7. Upper secondary cowl.
  8. Upper firewall weatherstrip.
  9. Fill cooling system and check for leaks.
  10. Negative battery cable.

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Oct 21, 2010 | 1988 Buick Regal

1 Answer

How to replace a heater core


Heater Core Removal & Installation Front To Remove:
  1. Make sure you have the anti-theft codes for the audio and the navigation system, and then write down the audio presets.
  2. Disconnect the negative cable from the battery.
  3. From under the hood, disconnect the heater valve cable from the heater valve. Turn the heater valve arm to the fully opened position.
  4. When the engine is cool, drain the engine coolant from the radiator.
  5. Disconnect the inlet heater hose and the outlet heater hose from the heater core.
  6. Remove the mounting nut from the heater unit. Take care not to damage or bend the fuel lines, the brake lines, and related parts.
  7. Remove the dashboard.
  8. Remove the evaporator.
  9. Remove the mounting bolts and remove the heater unit. Front heater unit honda-10-00-4128.gif

  10. Remove the self-tapping screws and the clamp.
  11. Carefully pull out the heater core so you don't bend the inlet and outlet pipes.
Front heater core honda-10-00-4129.gif

To Install:
  1. Using care, install the heater core to the heater unit and secure.
  2. Using care, install the heater unit and tighten mounting nuts and bolts to 7 ft-lb (10 Nm).
  3. Install the evaporator.
  4. Install the dashboard.
  5. Connect the inlet heater hose and the outlet heater hose to the heater core.
  6. Connect the heater valve cable to the heater valve.
  7. Refill the cooling system with engine coolant.
  8. Adjust the heater valve cable.
  9. Make sure that there is no coolant leakage.
  10. Make sure that there is no air leakage.
  11. Connect the negative battery cable.
  12. Perform the power window control unit resetting procedure.
  13. Enter the anti-theft codes for the audio and the navigation system, and then enter the audio presets.
Rear To Remove:
NOTE: The rear blower motor, the rear heater core, the blower screen, the rear blower resistor (heating/air conditioning system) and the rear power transistor (climate control system), the rear air mix control motor (climate control system) , the rear mode control motor and the rear expansion valve can be replaced without removing the rear heater-A/C unit.
  1. Remove the self-tapping screws and the clamp, and then remove the bolts and the rear evaporator lines with the rear expansion valve. If necessary, remove the rear expansion valve. Use a second wrench to hold the other fitting on the valve so the rear evaporator lines won't twist. Leave the first fitting loosely connected so you can use it to hold the valve while you loosen the second fitting.
  2. Remove the rear heater hoses.
  3. If necessary, remove the rear blower motor, the rear heater core, the blower screen, the rear blower resistor (heating/air conditioning system), the rear power transistor (climate control system), the rear air mix control motor and the rear mode control motor.
  4. Remove the self-tapping screws and the lower housing.
  5. Remove the self-tapping screws, and carefully separate the left upper housing from the right upper housing. Remove the rear heater core.
Rear evaporator assembly honda-10-00-4116.gif

To Install:
  1. Replace the rear heater core.
  2. Attach the heater hoses.
  3. Make sure no air is leaking from the left upper housing and the right upper housing fitting and from the upper housings and the lower housing fitting.
  4. Before reassembly, make sure that the rear air mix control linkage and door move smoothly without binding.
  5. Before reassembly, make sure that the rear mode control linkage and door move smoothly without binding.
  6. Reassemble the housing.
  7. After reassembly, make sure the rear air mix control motor runs smoothly.
  8. After reassembly, make sure the rear mode control motor runs smoothly.
  9. Refill the cooling system and make sure that there is no coolant leakage.
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Oct 16, 2010 | 2005 Honda Pilot

1 Answer

Heater will not blow hot air while truck is idle. When truck is moving hot air blows. There is some clear redish leakage underneth the truck. How can I fix this problem?


You are low on coolant. Find the leak, the red is most likely the coolant.
Coolant comes in 2 colors red and green.
Your leak is probably either a hole in a hose or a faulty water pump. The water pump has a small hole, usually on the bottom, when the seal goes bad, it will leak there. The only fix is a new water pump.

If it is a hose, just replace it. Make sure when you fill it that you fill the radiator and the overflow, just filling the overflow could cause it to over heat.
Also, depending on your climate, you need to mix your anti-freeze with 30-50% water. If you live in a very cold climate, you want to go with 30%water-70%anti-freeze.
Make sure that you use the right anti-freeze. red with red, green with green. Some green ones are now compatible with the red, if you change the color, make sure it is compatible.

Feb 18, 2010 | 2004 Dodge Ram 1500

1 Answer

Heater not working


The Navigator has rear air, so coolant lines run to a heater core in the rear. It will help if you elevate the front of the truck on a set of ramps or incline. Turn the heat for both front and rear. Run the truck and add coolant as needed until all the bubbles come out of the coolant tank. You can tell when you get coolant to the rear when hot air blows from the vents. By raising the front of the truck you allow the the air in the lines to bleed to the front.

Jun 22, 2009 | 2001 Lincoln Navigator

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