Question about 2004 Pontiac Grand Am

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Coolant leakage or over flow - 2004 Pontiac Grand Am

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Is the vehicle running hot?
If so , it would be bypass from the overflow

Posted on Oct 06, 2010

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Posted on Jan 02, 2017

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I have a polo classic 1.6 2002 model. Its smoking after idling for a while. On a start up it doesn't.


It depends on the type of smoke flowing from the exhaust. It will be either burnt oil smoke or burnt coolant smoke which is lighter in colour.

Check to see if you are losing radiator coolant with no sign of any external fluid leak. If so and you have light coloured smoke from the exhaust you probably have a coolant leak into a combustion chamber(s) by way of a blown head gasket or a crack in the cylinder head. This can be checked by a leak down test on each cylinder (A prior check of compression will show if you have any compression leakage on any cylinder but not the leak source).

Jun 08, 2016 | Cars & Trucks

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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

Small amount of milk in oil


To check whether the coolant is entering into the engine oil or not, do the following.
- Park the car on a level floor.
- Check engine oil level on the dip stick and mark it with nail polish. Let it dry. Confirm the oil level. Put the dip stick back.
- Apply about 10 psi external pressure to the coolant system, while keeping caps in place.
NOTE: It is advised to use the coolant system tester. In case the tester is not available, ask any technician to do it for you. Or you can use a bicycle pump with gauge installed on it to pressure the system up to 10 psi. The system should held the pressure up to 30 Seconds.
- If the pressure is maintained for 30 Seconds every thing is good at this time. Ensure that the air is not leaking through your external pump system with which you are testing the system.
If the pressure drops, there will be a leakage some where. Either external or internal. External leakage can easily be observed while carefully examining the hose pipes, clips and joints on the engine.
Internal leakage can be determined by checking the engine oil level again.
- Take out the dip stick and inspect the oil level. If the engine oil level increases it confirm the internal leakage.
- Internal coolant leakage could be due to:-
1. Cylinder head bolts loose or under torqued. (Re-Torque the bolts).
2. Burnt cylinder head gasket. (Always use original spares).
3. Cylinder and head surfaces warped. (Surface grind the cylinder head on surface grinding machine and replace the gasket).
4. Any corroded lid in the cylinder block or cylinder head assembly.
5. Oil cooler, if any.
If the test report of above mentioned procedure is found to be OK, start the engine, pull up dip stick a little, open breather tube from the tappet cover, keep it open and keep the engine start for as long as the water vapors coming out of these points disappear and the engine oil will become clear to its original color.
At times it happens that immediately after replacing the cylinder head gasket some coolant may flow into the engine unavoidably and keep contaminating the engine oil for quite some time.
Hope that works.
Thank you for visiting Fixya.

Mar 03, 2014 | Chevrolet Cobalt Cars & Trucks

1 Answer

Is there any way besides the head gasket for coolant to burn out of the exhaust?


That is the most common route into the exhaust, via the cylinder head but, is the vehicle a diesel with a water cooled turbo? If so, check the small coolant pipes, at the turbo, for flow and return and try to see (when cold) if there is leakage past the turbo seal.
If the vehicle is conventionally asperated, a pressure test on each cylinder, should reveal if the integrity of the head gasket is compromised.

Oct 06, 2012 | Cars & Trucks

1 Answer

When idle or after turning on a/c, my 2009 tiguan starts overheating. I received a warning message which said "STOP and check engine coolant" but coolant is full


the cooling fan may not be working check to see if its working,also you may have a faulty water pump check for signs of leakage or flow. a sticking thermostat may also caurse overheating.

Jul 27, 2011 | 2009 Volkswagen Tiguan

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

I have a red dash warning light (no manual) & warning ping when I start up engine. Symbol is like an exclamation mark in circle with outside incomplete circle-lines Cheers


this light for coolant level indicator top up coolant level then s.w off and on , check for coolant leakage may be leakage from radiator sender.

Jun 18, 2011 | Volkswagen Golf Cars & Trucks

1 Answer

I have bought a 99 land rover discovery and it is overheating


From practical experiences of heavy trucks, this problem is created by poor coolant flow thro' the Radiator Core. Flush cleaning the Rad. or decontaminating the exterior air flowways will not cure the problem. My recommendation is a Recore or after market replacement.
Regards.DT

May 10, 2010 | 1999 Land Rover Discovery

1 Answer

My 1999 Honda Civic is overheating frequently. There is no oil in the coolant, no coolant in the oil, no smoke or water from the tailpipe, no cooling system leakage and coolant is flowing through the...


Yes, check your electric fan for the radiatior. Either the sensor to turn it on is not working, a wire is broken, or the fan is defective. I had some problem on my Toyota but the fan blade was broken so the motor spun but did not good :(

Mar 17, 2010 | Honda Civic Cars & Trucks

1 Answer

Overheating


have you checked if the water in the radiator is flowing constantly

Mar 16, 2009 | 2001 Oldsmobile Intrigue

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