Question about 1999 Cadillac DeVille

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I have been putting alot of coolant in my radiator I dont think its a hose because it seems to be coming from the middle to bottom part of the car could this be a water pump problem?

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The water pump is in the center of the engine. It usually has a small hole in the casting on the snout. If the seal went bad water usually runs out of the small hole and down the center of the front of engine. With the engine OFF, put your hand under the pump, and feel the snout to see if water winds up on your hand. If possible use a flashlight and check for a leak all around the pump, and bolts that hold it in. In a rare case the pump gasket could be leaking. If the pump appears to be dry, check the small hose that goes from the center of the pump to the block.

Posted on Jul 28, 2010

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1998 Toyota Camry 4 cyl.only blows warm air from heater when car is unning for say ten min. When I start driving the temp gage goes down to cold and blows cool air, no heat. I changed thermostat and...


Your radiator cooling fan will only come on when the engine temp has reached the point where it needs to have air forced through the radiator and thus bring engine heat back down to safe operating range. If your heater is not working check to make sure the fresh air vents aren't stuck open (are the controls stiff or not going all the way across?) check also that the heater shutoff valve lever which is usually situated on the firewall at the rear of the engine and can be found easily by tracing the hoses back from the thermostat housing aren't bent and/or seized up.

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On my 1999 oldsmobile alero. the overflow hose seem like it got a pin hold in it. because when i was driveing all this stam was comeing out. where is it comeing from?


Yes it could be a leak in the hose between the radiator and the overflow tank. The tank is supposed to hold excess coolant when the engine is hot and then release it back into the radiator when the engine is cool.

Jul 25, 2012 | 1999 Oldsmobile Alero

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CAR OVERHEATING FIRST CHECK FOR LOW COOLANT IN THE RADIATOR COOLANT OVERFLOW JUG.IF COOLANT LEVEL IN OVERFLOW JUG LOW REFILL ADD COOLANT BACK TO THE FULL COLD MARK.PUT RADAITOR CAP ON COOLANT OVERFLOW JUG START ENGINE LET IT IDLE UNTIL IT OPERATING TEMPERATURE.MAKE SURE TOP RADIATOR HOSE GETTING HOT WHILE ENGINE WARM UP.IF TOP RADIATOR HOSE DONT GET HOT WHILE ENGINE IDLING YOUR THERMOSTAT COULD BE STUCK CLOSE CAUSING CAR TO OVERHEAT.IF TOP HOSE IS GETTING HOT.CHECK FOR COOLANT LEAKS CHECK TOP RADIATOR HOSE AND BOTTOM RADIATOR HOSE FOR LEAKS.CHECK FOR LEAKS AT THE RADIATOR CORES AND PLASTIC SIDE CONTAINERS.IF ALL IS GOOD ENGINE OVERHEATING WHILE IN A LONG TRAFFIC LINE, COOLANT FANS NOT COMING ON.COULD HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR BLOWN COOLING FAN FUSE OR RELAY.COULD HAVE PCM FAULT.MAKE COOLING FAN ELECTRICAL CONNECTORS AND WIRING NOT DAMAGE OR BROKEN.

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Need a diagram of how to install a thermostat on my 99 mailbu


  1. do it when cold(coolant)
  2. if never done this before just follow thes step's
  3. on radiator at bottom it's left side at bottom (face the car)is drain plug loosen to let some of coolant out dont have to drain all of it (gallon or so)
  4. follow top hose to engine at end of hose will be thermosat housing it be 2 bolt's holding it on (1/2 inch socket )
  5. before taking out bolt's take clamp off of hose & pull hose off.
  6. now take bolt's out
  7. lift housing off
  8. look at how thermostat is in
  9. take out thermostat dicard
  10. clean gasket off of housing & engine block
  11. put sealer on block & put thermostat in (same way came out)
  12. put gasket on block & put thermostat housing on ,put bolt's in ,tigthen bolt's (20 flbs)
  13. put hose on & tigthen clamp
  14. close drain plug & titghen
  15. top off radiator with coolant
  16. crank engine , tpo off w/more coolant if need it ,let it run & come to temperture ,top off radiator again ,because when the thermostat open's coolant will begin to flow ,when full put cap on radiator ............DONE
  17. JUST CHECK MAKE SURE NO LEAK'S

Dec 17, 2010 | Chevrolet Malibu Cars & Trucks

1 Answer

RAdior is leaking badly what do I do? One of the hoses seems to be broken, and seems like a huge leak on the bottom??? Need help asap contact me at downloadkris4free@hotmail.com


  • Turn off the engine as soon as you suspect a leak, to prevent the engine from overheating.
  • 2 Determine which radiator hose is leaking and exactly where the leak is coming from by looking for wetness.
  • 3 Purchase 1 gallon of antifreeze and the correct replacement radiator hose from your local auto-parts store or dealer. (Radiator hoses are not interchangeable. They come in specific sizes and shapes for your particular car model.)
  • 4 Wait for the engine to cool down for at least 20 minutes, before beginning any work on the cooling system.
  • 5 Place a large pan or wide bucket on the ground under the hose to catch the coolant.
  • 6 Use a screwdriver to loosen the hose clamps at both ends of the hose you are replacing.
  • 7 Remove the radiator hose by twisting and pulling where it connects to the radiator and engine. If the hose won't budge, use a utility knife to cut it off the fittings.
  • 8 Remove the hose clamps from the old radiator hose and slide them onto the new hose.
  • 9 Put the new radiator hose on. Spray the inside of the hose ends with WD-40 if the hose is hard to get on. Tighten the hose clamps.
  • 10 Refill the radiator and the coolant reservoir with a 50-50 mixture of water and antifreeze.
  • 11 "Burp the cooling system" by running the engine with the radiator cap off until the engine warms up. Keep the engine running until both the upper and lower radiator hoses feel warm (this indicates that the thermostat is open and the coolant is flowing through the entire system). Burping the cooling system allows any air bubbles to escape. Add coolant to the radiator as needed.
  • 12 Look for leaks. Inspect around the hose clamps for dampness. Tighten the hose clamps if there is any wetness.
  • 13 Put the radiator cap back on.
  • 14 Check the coolant level after driving, to ensure there are no leaks



  • Dec 13, 2010 | 2001 Chrysler Sebring

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    My 1998 Saturn SL2 is leaking coolant what is causing the problem? I have poured coolant into the compartment that the manual said to, this Saturn has 140,000 miles on it. The meter reads cool when I put...


    it could be one of the hoses leaking. with your car running look under the front and see where it is coming from. The top/bottom hose coming off the radiator or MAYBE from the water pump

    Jul 15, 2010 | 1998 Saturn SL

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    How to replace a thermostat on a 1990-lexus ls 400


    open the hood and locate the big hose that comes form the radiator on the top it is under the air channel cover that goes across the top of the radiator remove it and you will see the hose in the middle of the front of the engine remove the 2 bolts and be careful not to spill alot of your coolant or if it is hot to burn yourself once you get the thermostat housing off pop the old one out and put a new o ring or gasket in there with the new one tighten it back up and put the air channel back on and re fill the coolant start it check for leaks and you are good to go if there are no leaks.

    Jul 08, 2010 | 1990 Lexus LS 400

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    Leaking coolant. Not from hoses or radiator. Seems


    you are looking at a water pump problem, have fun

    Jul 08, 2010 | 2000 Chevrolet Silverado

    1 Answer

    My s type over heats and blows cold air please help


    hey deanfuller,
    Ok, ive seen this alot with this year s-type, the only problem is its always something different.

    What i would do first is warm the car up, NOT TO HOT, but warm it up and start feeling hoses. Turn your heat on full blast and let the car idle. When the car is warm all your coolant hoses should be warm, check the top and bottom radiator hoses the hoses before and after the thermostat.

    I mean it coolant be coolant gumming up, radiator plugged, bad thermostat, bad or plugged heater core, bad fluid valve just a ton of stuff soo its hard to say one.

    But after you checking the hoses, this is what i think it is, this is just a educated guess. I think its your fluid valve not opening. This valve is located on the passenger side of the radiator all the way on the bottom. There are i think either 2 or 3 small hoses coming to and from it. Now this valve is electronically controlled so you have to get a multi meter and make sure it is getting voltage at the 2 pin connector. If it is, then you can replaced the valve.

    I know this is alot, i hope this helps you out. Start with this and let me know if you need more.

    Apr 18, 2009 | 2000 Jaguar S-Type

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