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| Changing Antifreeze, any warnings? http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=52315 |
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| Author: | tulsa [ Thu Apr 29, 2010 11:41 am ] |
| Post subject: | Changing Antifreeze, any warnings? |
I am ready to drain the antifreeze and replace with Zerex G-05. I would like comments on how to reach the drain valve the easiest and whether the CRD drains completely just removing the cap and opening the valve. Thanks Lewis |
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| Author: | racertracer [ Thu Apr 29, 2010 1:13 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
I Believe that the process is a little more indepth than that..... Read Below. STANDARD PROCEDURE DRAINING COOLING SYSTEM. WARNING: DO NOT REMOVE THE CYLINDER BLOCK DRAIN PLUGS (1) OR LOOSEN THE RADIATOR DRAINCOCK WITH SYSTEM HOT AND UNDER PRESSURE. SERIOUS BURNS FROM COOLANT CAN OCCUR. 1. DO NOT remove radiator cap first. With engine cold, raise vehicle on a hoist and locate radiator draincock. NOTE: Radiator draincock is located on the left/lower side of radiator facing to rear of vehicle. 2. Attach one end of a hose to the draincock. Put the other end into a clean container. Open draincock and drain coolant from radiator. This will empty the coolant reserve/overflow tank. The coolant does not have to be removed from the tank unless the system is being refilled with a fresh mixture. When tank is empty, remove radiator cap and continue draining cooling system. REFILLING COOLING SYSTEM 1. Tighten the radiator draincock and the cylinder block drain plug(s) (if removed). CAUTION: Failure to purge air from the cooling system can result in an overheating condition and severe engine damage. 2. Fill cooling system with the antifreeze mixture (Refer to LUBRICATION & MAINTENANCE/FLUID TYPES - DESCRIPTION). Fill pressure bottle to service line and install cap. NOTE: The engine cooling system will push any remaining air into the coolant bottle within about an hour of normal driving. As a result, a drop in coolant level in the pressure bottle may occur. If the engine cooling system overheats and pushes coolant into the overflow side of the coolant bottle, this coolant will be sucked back into the cooling system ONLY IF THE PRESSURE CAP IS LEFT ON THE BOTTLE. Removing the pressure cap breaks the vacuum path between the two bottle sections and the coolant will not return to cooling system. 3. With heater control unit in the HEAT position, operate engine with pressure bottle cap in place. 4. Add coolant to pressure bottle as necessary. Only add coolant to the pressure bottle when the engine is cold. Coolant level in a warm engine will be higher due to thermal expansion. NOTE: The coolant bottle has two chambers. Coolant will normally only be in the outboard (larger) of the two. The inboard chamber is only to recover coolant in the event of an overheat or after a recent service fill. The inboard chamber should normally be empty. If there is coolant in the overflow side of the coolant bottle (after several warm/cold cycles of the engine) and coolant level is above cold full when cold, disconnect the end of the overflow hose at the fill neck and lower it into a clean container. Allow coolant to drain into the container until emptied. Reconnect overflow hose to fill neck. COOLING SYSTEM - REVERSE FLUSHING CAUTION: The cooling system normally operates at 97-110 kPa (14-16 psi) pressure. Exceeding this pressure may damage the radiator or hoses. Reverse flushing of the cooling system is the forcing of water through the cooling system. This is done using air pressure in the opposite direction of normal coolant flow. It is usually only necessary with very dirty systems with evidence of partial plugging. CHEMICAL CLEANING: If visual inspection indicates the formation of sludge or scaly deposits, use a radiator cleaner (Mopar T Radiator Kleen or equivalent) before flushing. This will soften scale and other deposits and aid the flushing operation. CAUTION: Be sure instructions on the container are followed. REVERSE FLUSHING RADIATOR: Disconnect the radiator hoses from the radiator fittings. Attach a section of radiator hose to the radiator bottom outlet fitting and insert the flushing gun. Connect a water supply hose and air supply hose to the flushing gun. CAUTION: The cooling system normally operates at 97-110 kPa (14 -16 psi) pressure. Exceeding this pressure may damage the radiator or hoses. Allow the radiator to fill with water. When radiator is filled, apply air in short blasts allowing radiator to refill between blasts. Continue this reverse flushing until clean water flows out through rear of radiator cooling tube passages. For more information, refer to operating instructions supplied with flushing equipment. Have radiator cleaned more extensively by a radiator repair shop. REVERSE FLUSHING ENGINE: Drain the cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE). Remove the thermostat housing and thermostat. Install the thermostat housing. Disconnect the radiator upper hose from the radiator and attach the flushing gun to the hose. Disconnect the radiator lower hose from the water pump. Attach a lead away hose to the water pump inlet fitting. CAUTION: Be sure that the heater control valve is closed (heat off). This is done to prevent coolant flow with scale and other deposits from entering the heater core.'Connect the water supply hose and air supply hose to the flushing gun. Allow the engine to fill with water. When the engine is filled, apply air in short blasts, allowing the system to fill between air blasts. Continue until clean water flows through the lead away hose. For more information, refer to operating instructions supplied with flushing equipment. Remove the lead away hose, flushing gun, water supply hose and air supply hose. Remove the thermostat housing (Refer to 7 - COOLING/ENGINE/ENGINE COOLANT THERMOSTAT - REMOVAL). Install the thermostat and housing with a replacement gasket (Refer to 7 - COOLING/ENGINE/ENGINE COOLANT THERMOSTAT - INSTALLATION). Connect the radiator hoses. Refill the cooling system with the correct antifreeze/water mixture (Refer to 7 - COOLING - STANDARD PROCEDURE). INSPECTION: After performing a cleaning/flush procedure, inspect all hoses, clamps and connections for deterioration and leaks. Inspect radiator and heater core for leaks. |
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| Author: | tulsa [ Thu Apr 29, 2010 1:57 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
Does the CRD have a engine block coolant drain also? The picture in the SM only shows the 3.7L. Lewis |
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| Author: | MrMopar64 [ Thu Apr 29, 2010 2:42 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
No block drains on the VM, at least nothing serviceable in the sense of a plug that can be removed like other engine families. |
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| Author: | dgeist [ Thu Apr 29, 2010 4:36 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
FYI: 11.8 qts (or just under 3 gallons) is the service manual capacity for the CRD cooling system. Be prepared to catch that and drop it off somplace listed at http://earth911.com/. Most types of automotive coolant are known to be toxic to animals if consumed. Although somewhat biodegradable, ethylene glycol and similar compounds (even the "green" ones) will suck the free oxygen out of a water table as they break down and threaten everything from fish to microbes. Better to be safe and drop it off at the local reputable quickie-lube or recycling center. Also, if you haven't changed your coolant before, there's a good chance you're on your first thermostat and you might want to go ahead and change it while your coolant is out http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=50940. Dan |
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| Author: | tulsa [ Thu Apr 29, 2010 8:07 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
I am still having trouble getting a wrench on the drain valve, there is a hose that wraps around the valve that is secured by a bracket I can't get to. Is the nut on the valve 15 or 16mm? Is there a female hex or torx in the end of the nut? Lewis |
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| Author: | tulsa [ Fri Apr 30, 2010 11:10 am ] |
| Post subject: | Re: Changing Antifreeze, Help! |
I could really use some help from someone who has changed the antifreeze in their CRD. I have changed antifreeze in all my vehicles in the past, but can't get the drain cock open on my Jeep. Can't get a wrench or pliers on from the top or bottom. The plastic nut is not a straight hex, but I have managed to turn it about 1/4 turn. In order to do that I had to remove the air intake hose to the filter box. Is it possible to get an Allen wrench into the end of the valve? Lewis |
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| Author: | GreenDieselEngineering [ Fri Apr 30, 2010 12:36 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
tulsa, It is quite a challenge to open the drain on the radiator. We ended up using some channel locks and a long nose pliers to to keep rotating it counter clockwise just a few degrees each turn. Eventually the plug will rotate out about a 1/4' or so and then the coolant will flow well. The plug is fully out in about 1 full turn or less. Maybe the drain was designed with you in mind...it adds challenges to your life, what could have been an ordinary day just turned into something more! If you can deal with a quick drain, it might be easier to remove the lower radiator hose...this tends to get messy! Good Luck, GDE |
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| Author: | tulsa [ Fri Apr 30, 2010 1:30 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
GreenDieselEngineering wrote: tulsa, It is quite a challenge to open the drain on the radiator. We ended up using some channel locks and a long nose pliers to to keep rotating it counter clockwise just a few degrees each turn. Eventually the plug will rotate out about a 1/4' or so and then the coolant will flow well. The plug is fully out in about 1 full turn or less. Maybe the drain was designed with you in mind...it adds challenges to your life, what could have been an ordinary day just turned into something more! If you can deal with a quick drain, it might be easier to remove the lower radiator hose...this tends to get messy! Good Luck, GDE GDE, Thanks so very much. I had come to the conclusion that the only way to open the valve was with extra long handle needle nose pliers. I am so close to 1/4 turn now, should not much more movement. Lewis |
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| Author: | papaindigo [ Mon Jan 17, 2011 2:58 pm ] |
| Post subject: | Re: Changing Antifreeze, any warnings? |
Late update on draining regarding how to open/close the radiator bottom drain plug. Squeeto (viewtopic.php?f=5&t=56486&p=628305&hilit=citric#p628305) recommends, works great, cutting 2cms off a 10mm Allen wrench. Stoutdog has tried this idea and adds 1) remove air box and 2) come in from the top with a Craftsman box/open end double ratchet wrench. The Allen thing pops right in and stays in place and the ratchet wrench opens and closes it with the greatest of ease. |
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