Question about 2008 KTM 250 SX-F

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Water coming out overflow

When bike running water coming out of the overflow of radiator

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Rad cap might be bad or bike overheating try a 50/50 water to antifreeze mix or thermostat

Posted on Apr 17, 2014

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My 2000 chrysler voyager radiator fluid bubbles in radiator overflow tank evn when cold nd when turning over. I just had head gasket replaced whats going on


I suspect a crack in the head or block. The cooling system is suppose to be closed so any air has to be coming from somewhere - if the head gasket is good then the air is likely to be coming from a crack. A pressure test will confirm if your system is not air tight. That is if you are seeing bubbles in the radiator water if you just mean you are losing water through the overflow then it might just be the radiator cap needs replacing as it is not sealing the system when it gets hot.

Jan 23, 2013 | 2000 Chrysler Grand Voyager

1 Answer

Daihatsu Applause Cooling system problem


two chances either the impeller on the water pump has come off the drive shaft ,its plastic on a metal shaft and they do often go or the head gasket where the vehicle has been run with no antifreeze causing the water ports to corrode and get bigger ,hence your rad blocked so where did this blockage material come from? think about it

Mar 05, 2012 | Cars & Trucks

1 Answer

Water is coming out of the radiator and is going into the overflow tank when engine is shut off


this is normal. The heat from the engine is no longer being circulated by the water pump, this causes the pressure to rise. The coolant is expelled into the coolant tank. The coolant is drawn back into the radiator as it cools. If the coolant level is low when checked ( bike cool ) then there may be another problem. Over heating due to stuck thermostat or blown head gasket. Be sure the coolant overflow tank hose is not cracked or leaking.

Dec 23, 2010 | 1998 kawasaki KLX 300

1 Answer

Coolant coming out overflow. Can grooves in water pump shaft cause this?


no, the groves may alow water into the oil, past the seal, or even outthrough the leakhole in the pump housing, would check condition of the radiator cap, make sure it iss sealing ok not got corroded or contaminated inside the radiator where the cap seals, you dont say what bike it is my bigest thought on this if the pre mentioned is not the cause would be the head gasket has failed,forceing presure into the system and pushing the water out, but without seeing the bike my advice would be to do a compresion test to eliminate this.

Dec 08, 2010 | Honda CR 250 R Motorcycles

1 Answer

Water comes out overelow tube of radiator when


It should build up some pressure, before it overflows as it heats up, perhaps you need a new cap.
If the bike starts and runs ok it probably isnt a head gasket gone

May 12, 2010 | 2004 Suzuki RM-Z 250

1 Answer

Coolant leaks


Any of the yz and wrf 250 and 426 ,450 will overheat and water will come out of the radiator if you let it sit and idle.After a hard run it happens quickly.20 seconds.After a cold startup,5 mins.If you own one of these bikes,turn it off after TEN seconds of idling.ESPECIALLY after a hard ride.Basic rule.They do not like to idle.They need air over the radiator......Hope this helps

Mar 09, 2010 | Yamaha YZ 450 F Motorcycles

2 Answers

First Steam then Water coming out of the overflow hose of the radiator reservoir. Is this a thermostat problem or Waterpump. When water is coming out the dash thermometer is approx half way. When I remove...


Your overflow hose is at the first tier after the seal on the radiator cap. The first thing I would check is the cap gasket, then make sure the cap is completely installed, push down hard and turn until it locks into position. If your water pump was bad, you would either be leaking water from the pump, or your car would be running hot. Usually, when you have steam/water coming out the overflow, if it is not a problem with the cap, then you are indeed running hot. If the thermostat is not opening or is stuck in the closed positiion, it will not cause your radiator to overflow, however if it is sticking closed and allowing your car to overheat then opening at a higher pressure, it could happen. Check the components in this order, gasket, cap installation, then thermostat, (you can replace the thermostat for about 10 dollars. Good luck

Oct 06, 2009 | 2000 Mazda 626

2 Answers

Wen running hot the overflow of the radiator runs bak onto the radiator and exaust cause a big boil up and smoke everywhere. why is it getting so hot?


the puke line for the radiator runs to the frame between the radiators. it's a bad location for it and very messy in the event of coolant loss.

yes they tend to run hot...
ktm has a great add on electric fan for your bike and it well help greatly. save money by installing it yourself as its easy to install.

also use Engine Ice or Water Wetter for better cooling.

I prefer Evans NPG, cost more but worth it!

Jun 25, 2009 | 2008 KTM 450 EXC-R

2 Answers

Water not staying in Radiator


yes, not having an overflow reservoir for your radiator will cause you to lose water. As your engine warms up the water expands and creates pressure in the cooling system. When the pressure reaches a certain point(usually about 15 psi.) the radiator releives the pressure by releasing water into the overflow tank. When the engine cools back down the water shrinks pulling water back into the radiator from the overflow. If there is no overflow, the everytime the engine warms up on a drive water will be lost and not recovered on cooldown.

Jun 04, 2009 | 2000 Hyundai Elantra

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