Question about 1994 Cadillac DeVille

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There is water leakage from the engine and we can not see from which place it leaks because it is between engine and the place near to dashboard.cadillac concours1994 northstar engine 4.6l v8

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Must be a HVAC problem . u got to replace the hoses for the HVAC .

Posted on Dec 02, 2012

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You will have to ethier get under the car or crawl on top and check the heater hoses this sounds like your problem.

Posted on Jan 31, 2010


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Water leak at waterpump

Since you are able to determine that the leak is from the water pump, I assume your Grand Am has a 3.1L V6 and not a 4-cylinder engine. Water leakage at the pump is indicative of a defective pump bearing. There is a "weep hole" built in to allow for this leakage when the pump bearing begins to wear out. Replacement is the only repair.

Jan 01, 2014 | 1996 Pontiac Grand Am


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

1993 Camry v6 le overheating and fluid in reservoir boiling and smoking on that side only. Nothing seems to be leaking from radiator, but I'm having to add antifreeze daily. Once antifreeze is in...

Hi Lil Cutey, The proof that you have a leakage is the fact that you need to add coolant every day. The leakage is somewhere else in the cooling system other than the radiator. Look at the places where the radiator pipes join to the engine to see if there are any signs of leakage. There will be a powdery deposit a similar color to the coolant. If you locate the leakage you may be able to get new hose clips and attend the problem. If the leakage is not evident from there, you will need to look more deeply. Inspect the front of the engine, where the serpentine belt is fitted and look for the same marks around the water pump. If its the water pump which is leaking it will mean fairly major work. If you want to tackle it let me know and we can go through it together. but it is not simple! Now we come to the worst part. If there are no signs of leakage from the water pump, start the engine and leave it idling until it gets to operating temperature and then let it continue until you can see which part of the engine where the steam is most dense. If its from the back of the engine (the part closest to the passenger compartment, then your car may have a major problem with that cylinder head. To work on that needs a certain expertise and special tools and equipment. The cylinder head will also need to be taken to a machining company for skimming. Let me know what you would like to do.Regards John

May 04, 2012 | 1993 Toyota Camry V6

2 Answers

No leakage anywhere near engine but still the engine oil is disappearing

Check coolant tank for oil deposits( milky in substance) means you have a bad head gasket.
Usually if you were burng oil you see it at the tail pipe.
If you still can't find anything then bring it to a shop and have them do a cylinder leakage test. If yor handy let me know I'll give you the procedure do this. Good luck

May 20, 2010 | Cars & Trucks

1 Answer

Cooolant level down no leakage from engine

u could have a leake in your head gasket and the collent is getting out that way . when car is up to temp stand behind the car near the exaust a see if u can smell the coolant

May 04, 2010 | Chevrolet Chevy Cars & Trucks

2 Answers

Water leak, installed new water pump thinking was the problem but not

check to make shure that there isnt any cracks in the hoses or leaks in the radiator.

Nov 02, 2009 | 1996 Chevrolet Lumina Mini

1 Answer

Water leakage

Possibly a core plug. They are pressed into various places around the block and often corrode from the inside out. It may be easier to see where it's coming from if you take it for a couple of block drive, to pressurize the system, then have a better look.

Aug 04, 2009 | 1996 Nissan Maxima

2 Answers

Radiator leak

if you want to make sure you can put some soap bubles on the hose and see where the leak has actually taken place as a first step in diagnostic.

just pour the soap on the top and you can see (not inside the radiator), once it blows then there is your leakage.

either the radiator itself is the prob or the hose

Aug 19, 2008 | 2001 Hyundai Elantra

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