Question about 2003 Honda Hornet 250

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I have the same problem too

I do have the same problem. I changed my Radiator cap was difective.hopefully this was creating unwanted pressue to leak out.

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It was coming out from the plastic tank on the side. after changing te radiator cap, the pressure stays well within the acceptable level and no coolant spitting out now.

Posted on Aug 31, 2009

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Where was it comming out from the weep hole on the water pump cover

Posted on Aug 30, 2009

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I have a 2000 Subaru Legacy that overheats!


there should be no pressure in a system when the engine is cold
the cap is designed to allow extra pressure to blow off into the over flow reservoir and as the system cols down there is a vacuum created in the cooling system which opens a valve in the radiator cap and draws coolant back from the reservoir
I suggest that yo have a radiator shop test the cap for operation and get a new cap

Apr 25, 2015 | 2000 Subaru Legacy

1 Answer

My 1997 buick park avenue, is getting hot. upper radiator hose gets under extreme pressue, stem coming from radiator hose/radiator inlet, leaks coolant only after shut off??


Normal pressure is 16 psi controlled by the radiator or coolant tank filler cap. Sometimes a cap fails to hold the proper pressure this is most noticeable at engine shut off, water and steam blow out

Aug 22, 2013 | 1997 Buick Park Avenue

1 Answer

Running hot


The easiest test if a pressure test of the radiator cap - if you don' t have a tester - when it is cool remove the cap and see if it is has a defective seal or other sign it is leaking - corroson/ antifreeze. It that looks ok get a pressure tester and test the system pressure only to the setting on the cap or by spec on your car. If it wont hold pressue look for leaks while pressurized including around your water pump. It that all checks out - you may have a lot of bugs in your A/C coils and radiator. A good check here is to get it up to the 200 deg and turn on the heater full hot - if the temp drops it is a good indicator of a plugged radiator or the need to flush your radiator if not buggy..

Jul 25, 2012 | 1999 Pontiac Grand Am GT

2 Answers

My heater is blowing cold air and the temp gauge is rising; do I need a new heater or is it something else? I regulary put in fuel injector cleaner every 3000 miles. When I searched for Heater Cores it...


it sounds like you are running out of coolant. refill and check for leaks. The coolant reservoir may have a leak. Your thermostat may need replacement.

Jan 14, 2011 | 2002 Pontiac Grand Am

1 Answer

Leaks Antifreeze but not all the time. Location of leak right center of Radiator. ( facing radiator) will a new raditor cap help?


hi,
no, I got a brand new radiator for a STS at a radiator shop for 140.00. shop around and replacing the radiator isnt too bad usually and you will save alot of money if you buy a chilton or haynes and do it yourself. Park it where children and unwanted people dont have access to your car. thats a strange place for a radiator to burst out of the blue. If you have to drive it in an emergency leave the radiator cap on to the first click or loose, but not tight. dont drive it at all if you dont have to.
good luck..
jm

Nov 06, 2010 | 2000 Cadillac Escalade

2 Answers

Antifreeze is leaking from around my radiator cap on my 2003 chevy impala and I think it is the cause for my car overheating but my radiator cap is not hot, What could be wrong?


try to replace a new rad. cap-if still leaking & original radiator-then the tanks are wearing down,try putting some stop leak in it momentary-radiator may need to be replaced-not that big of job,you can do yourself-shops will charge $$$$$ hope that helps-good luck!

Nov 05, 2010 | 2003 Chevrolet Impala

1 Answer

Changed entire cooling system and still overheats


The overheat sounds like an air pocket in the cooling system there are two bleeder screws located on top of thermostate hosing and 1 on the metal pipe just above the water pump I believe they are 7mm. with the radiator cap off and the car running slowly open 1 bleeder at a time just crack it loose until you get a steady stream of coolant make sure to keep the level in the radiator up. be carefull coolant may be hot! when you take the oil cap off you are creating a big vacuum leak thru the PCV (positive crankcase ventalation) system this is normal for this car to surge or die.

Aug 02, 2009 | 1997 Chevrolet Lumina

2 Answers

Change hose radiator


your radiator is probably bad small leak but itll do its deal of leak...

Jul 10, 2009 | 1997 Infiniti.5 J30

1 Answer

Water leak from top of expansion tank.2000 BMW 316i se


The water (coolant) in the expansion tank will rise and fall with the engine temperature. What the expansion tank does is collect and return coolant to and from the engine. When the engine warms up the coolant gets hot, builds up pressure and opens up the radiator cap. The coolant then goes into the expansion tank. Now when the engine cools down the pressure drops in the cooling system and the pressure drop (vacuum) pulls the coolant back into the engine via the radiator cap. The radiator cap allows the cooling system to build up pressure and by doing so increases the boiling point of the coolant, but when that pressure exceeds the caps rating the cap opens and the coolant goes to the expansion valve. The cap has another part to it that when the engine cools down and a partial vacuum is created in the cooling system a "valve" in the radiator cap opens and allows the coolant to be drawn back into the engine. I would look at your radiator cap to see if any gunk or build up is on it, and check the rubber gaskets for cracks. It's easiest just to replace the cap because they are inexpensive and easy to replace (2-10 dollars). The expansion tank should have two hoses on it. The one on the bottom comes from the radiator and the one on the top (possibly part of filler cap) runs down and is open to the ground. That way if it is overfilled or becomes overfilled it will slowly leak onto the ground. When and if you change your radiator cap, make sure the engine is cooled down, remove cap and start engine and turn heater to full blast, full heat. Leave the cap off and let it run until engine warmed up. This should burp out any air pockets that may have happened when coolant was changed. Also top off the coolant in the radiator while it is running. Hope this helps and good luck

Apr 03, 2009 | 1992 BMW 3 Series

2 Answers

Leaking Anti Freeze on a Dodge Neon 1999


i had the same problem until i changed my water pump,so you might want to get that checked out

Nov 15, 2008 | 1999 Dodge Neon

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