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I run my truck and buildup air in the radiator and water coming out?

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Pressure cap bad, replace radiator cap.

Posted on Nov 29, 2013


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Hi, i replace the thermostat and water pump flashed the radiator has coolant but still overheating, what else could it be its golf 4 tdi diesel 2002. Thank you

Radiator may have rust/salt deposits inside, if that is case its cheaper and better to change the radiator. Also for future don't use normal tap water in radiator, use a coolant + ph balanced water meant for radiators to reduce salt buildup inside radiator.

Also check the radiator fan is working ok and rotating in the right direction, sucking cool air inside not blowing out hot engine air to the radiator. Some electric fans can have wires mixed up so they start in the wrong direction. (make sure fan is sucking cool air outside towards the engine).

In some cars, radiator fan has a top cover that stops hot engine air getting sucked by the fan, if your car has it, make sure it is fitted properly and is in good order.

Some cars have a fan fitted on the AC condenser, make sure this fan is working as well.

Oct 01, 2016 | Cars & Trucks

2 Answers

How to flush a radiator in a 1998 ford expedition

Depends whether a problem is suspected or whether the radiator is definitely the cause of the trouble.

Flushing a radiator requires it to be no worse than moderately blocked because without reasonable water flow flushing is doomed to failure and even then it is nearly impossible to clean the interior of a radiator without taking it apart and rodding out the tubes or using either an acidic or a caustic additive.

Flushing the old coolant out and a small percentage of sludge is as much as can be accomplished unless an additive is used and even then with variable success. I do this by disconnecting the heater outlet hose and fitting the (turned on) garden hose to it and then running the engine until the water runs clear. Once this is done I transfer the garden hose to the top of the radiator (top hose disconnected and plugged) and also plug the disconnected heater hose. Start the engine and run until the water runs clear from the heater outlet.

A more thorough cleaning will require the radiator to be removed and laid flat on the floor. This is definitely a kill or cure process but no less risky than using a caustic additive.. The results are usually quite impressive but beware - you and anyone nearby is likely to get wet.

I have the poor-man's pressure washer, officially entitled a water-air gun, but as long as the radiator is filled with water and water is running through it and the inlet is sealed apart from the water-air gun or other arrangement that allows compressed air to be introduced into the filled radiator while water continues to flow will have the desired effect. I kneel on the radiator to keep it stable and sometimes I feel it grow under me when I give it the full air tank pressure.

If it breaks, the reason is it wasn't much good in the first place...

May 08, 2016 | Ford Cars & Trucks

3 Answers

Have 2005 chevy Silverado and its overheating have changed the water pump and thermostat have new hoses what else could be the problem

I would run radiator cleaner thru truck several times till water is clear and fill with correct ratio of antifreeze/water. Check oil if milky you have a cracked head or head gasket . clutch fan may not be engaging radiator old or incorrect for truck Semper Fi!

Feb 05, 2015 | 2005 Chevrolet Silverado

2 Answers

Why does my 2002 dodge intrepid run hot half of the time? I replaced a hose 2 days ago that burst. Today i put 1/2 and 1/2 in the reservor, it went straight thru, but looking under the car, saw nothing...

these cars have a water pump in the front center of the engine and when it leaks cant see it couse coolant or water runs to the back of the engine between the heads thats one but did you change the thermostat and or radiator cap? try with that first but is a good chance that you have a water pump problem.

May 24, 2014 | 2002 Dodge Intrepid

1 Answer

1990 BMW 525i 2.5L engine overheats after rplaceing water pump, stermostat,fan clucth,radiator

There's trapped air in the cooling system.
  • You need to remove the bleeder screw on top of the radiator when adding water to the expansion tank.
  • With the engine running, pour water into the expansion tank till you see air go out through the bleeder screw's hole.
  • Just keep adding water until no more air bubbles come out then just put the screw back in place.
  • Then fill the expansion tank to it's normal level/line.



May 07, 2014 | 1990 BMW 525i

1 Answer

Bad radiator

Step_1 disconnect inlet (top hose) & outlet bottom) hose. I'm assuming you're replacing a corroded radiator. They now offer copper or plastic radiators that have high resistance to corrosion. If you replace with alluminum or steel radiator, do a flush job yearly with replace with the green radiiator solution or the red one if you replaced with aluminum radiator.
Step_2 disconnect the electric fan. first unhook the wire connection, then loosen the 4 screws that's holding the fan assembly against the radiator.
Step_3 Loosen the bolts holding the radiator unit. When re-attaching the new radiiator, install new hoses as well. Fill the radiator through the pressure relief cap with 60-40 radiator to water mixture. The instructions say 50-50, but 60-40 is a stronger solution that prevents freezing, boiling, & corrosion buildup. It there's a coolant filter, replace this unit as well. It looks like an oil filter cartridge.
Preventive miantainance: Perform a coolant flush every 50K miles. Most car manufacturers recommend 30K miles or 2 years, which ever comes first, but that's to boo$t revenue for car dealership service centers. IMO the max is 70K or 2 years. When you notice the temperature is overheating in the summer months, an engine radiator flush AND replacing the thermostat is the solution. Most shops will say "you need a new water pump" and the scammer had not even performed a diagnostic test. The water pump will last the life of the engine (140K+ miles) unless the car had run dry without radiator fluid. The radiator fluid lubricates the water pump. Running the engine dry (or low of) without radiator fluid damages the water pump. Running tap water instead of 50-50 or 40-60 radiator fluid mixture will also cause premature wear on the water pump because water by itself is insufficient lubricant on the water pump.

Mar 12, 2014 | 1996 Cadillac DeVille

1 Answer

2002 silhoutte new tstat,radiator,belts and hoses runs hot no water at bleeder valve water pump 2 yrs old

It is running hot because have an air lock in the system. Check that the bleeder valve is not blocked . Take a hose off that is high up and run the engine until water comes out . Replace the hose and check for water in the radiator. Open the heater system to help bleed out the air.. If that fails take it to a radiator s\hop and have them pressure bleed it.

Jan 17, 2014 | 2002 Oldsmobile Silhouette

2 Answers

What would cause overheating with radiator full of fluid and coolant?

That old of a van I would say the cores in the radiator are corrodied and stopped up and impeding the flow of water though it. to check drain down the water in the radiator to about half after the engine is warmed up. Take a flashlight and look down the neck of the radiator and look at the ends or the cooling tubes they should be clean and no buildup, if they have a lot of buildup on them then they are probable plugged and not flowing water. Then start the engine and rev it up. You should see water shooting out of most of the cores above the water line the ones that no water comes through are plugged. The best fix is a new radiator you can pick them up off ebay at a much better price than the auto parts store. I have put 5 of them in different things including my 2001 caravan with no problems.
If money is tight and you are able you can drain the radiator and refill with distilled water and run it for a day or two then drain and repeat for several days. the distilled water is pure so it will absorb the mineral deposits that has built up in the cores from useing tap water to fill the radiator. But this may not get enough out to help because the water needs to flow through the tube to work. and do not do this if you live where it get below freezing. When you get finished only use distilled or deionized water mixed 50/50 with antifreeze to refill. You can by 50/50 premix but you are paying several dollars for a half gallon of distilled water that you can buy at the grocery store for 50cents
hope this helps

Jan 23, 2013 | 1991 Dodge Caravan

1 Answer

Temp on a 1997 jeep wrangler is running over 220 degrees. is this normal.

that is on the high end of normal, the thermostat is probably a 195 that is fully open at 210-so it really should run around 210 in warmer weather, and cooler if the air is cooler. check the coolant level, make sure the fan clutch 'slips' when you turn it-it should only spin about 1/2 a turn when you spin it by hand, if it is loose, it is not working properly, and if it spins too hard it is going to use a lot of gas and will be hard on the water pump bearing (and be loud). If you have doubts about the cooling system, change the thermostat to a 180, flush and full the radiator with new antifreeze (50/50 mix water and antifreeeze). Make sure the front of the radiator is clean so air can go through the fins, and check the upper radiator hose when the engine is hot to see if the hose is hot and has pressure (can't calopse the hose due to pressure buildup)-if you cannot, check your radiator cap, it might be defective.

Apr 19, 2011 | Jeep Wrangler Cars & Trucks

2 Answers

A couple of weeks ago I noticed a brown or rusty crusty looking buildup on the sides of the radiator resevoir. I cleaned most of it out, but last week the air conditioner stopped putting out any cool air....

You need to replace the radiator, and flush the coolant system, some one added water previously and you can not add water, it must be coolant fluid, Anti-freeze.

Aug 08, 2009 | 1997 Pontiac Grand Prix

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