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My 2002 crf450r is leaking radiator fluid. i put all new seals, bearing etc in the water pump and everything seems to look good! now with that being said, the COOLANT IS LEAKING INTO THE ENGINE. I kno

My bike is leaking coolant into the engine. while running it shoots out white-ish smoke. (Which is a direct indicator of coolant leakage into the engine). WHERE IS THE LEAK COMING FROM. I'm about to junk the darn thing

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  • Honda Master
  • 817 Answers

Check your head gasket

Posted on Nov 15, 2014

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Posted on Jan 02, 2017

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hotstickray2
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SOURCE: coolant leaking around new installed head gasket on a 83 honda gl1100 motorcycle. How do I fix it? Is starting it without coolant a good option?

You might have installed the head gasket wrong (Upside down or backward) or put the left head on the right side, You need to pull that head again and check that all the water holes line up with the gasket between the block and head, Also you should only use oil on the head bolts, the moly will allow the bolts to back off over time.

Posted on Apr 07, 2014

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On my 2002 sr5 sequoia radiator doesn't seem to be building up pressure,but,everything seems to be working properly ??? any comments??


leak in the coolant system
possible causes
cracked plastic radiator tanks ,
cracked hoses
rusted welsh plugs
corroded housing behind water pump putting water into sump ( grey sump oil)
have it pressure tested to find the fault

Jan 08, 2017 | 2002 Toyota Sequoia

1 Answer

Water Pump leaks from the front end of the Wagon.


follow this steps and fix it. God bless you
  1. Determine the Reason for Water Pump Failure
    • 1 Repair a water pump by checking your car for a failure in the bearings. You can test for bearing failure by seeing if there is any play in the shaft that is connected to the electrical fan blades, as well as the drive pulley to the pump itself.
    • 2 If you notice any free play in the shaft or the pulley, you will need to take the pump apart and replace the bearings.


    • 3 Determine if the water pump failure is due to a leak in the casing. Examine the water pump housing for leaking or water stains in the drainage hole next to the pulley.
    • 4 If water is dripping from this hole, then the seals inside the pump need to replaced in order to repair the pump.
    Remove the Water Pump for Repair
    • 5 Allow the engine to cool completely before removing any part of the cooling system. Never open a radiator cap or plug while the engine is still warm.
    • 6 Disconnect the car battery. This will prevent the electrical fan from turning on while you are under the hood.
    • 7 Drain the radiator of all fluid and disconnect the radiator hoses. Collect the fluid with a plastic container and keep it in a safe place until you are ready to put it back into the radiator.
    • 8 Remove the fan assembly. This will include the shroud, the fan and the fan belt. Disconnect the electrical leads for the fan.
    • 9 Remove the pulley for the fan belt as well in order to have access to the water pump.
    • 10 Use a socket set to remove the water pump from its engine mount.
    • 11 Open the housing for the water pump and replace the seals or bearing as necessary. Some auto parts stores carry repair kits that have both the seals and bearings for specific types of water pumps.
    • 12 Reassemble the cooling system by replacing the water pump, pulley, fan belt, fan assembly and radiator hoses. Refill the radiator with the fluid.
    • 13 Start the engine to see if the water pump repair was successful. Check for leaks before you take the car out on the road.

Oct 18, 2012 | Cars & Trucks

1 Answer

Solution for Honda crf450r overheating


Hi, Davincik66 and the usual suspects are:
1. Engine oil level and SAE weight are too low or not circulating.
2. Insufficient or blocked air flow over the engine.
3. Heavy combustion chamber carbon deposits.
4. Ignition timing retarded due to faulty MAP, CKP, or CMP sensor.
5. Carburetor jetted too lean.
6. Leaking intake or exhaust valve.
7. Water coolant old or low change every two years.
8. Water pump failure.
9. Radiator clogged, cap loose or malfunctioning.
10. Radiator fans not coming on.
11. Clutch slipping, brakes dragging, heavy load, towing a trailer etc.
12. Idling too long without moving.
13. For constant hot weather temperatures, mountain, or desert riding conditions consider adding an oil cooler and or cylinder head cooler.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
CRF450R Overheating
http://www.proride.com/smfforum/index.php?topic=79600.0
Honda CRF450X 2005 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CRF450R Owner Manual

Apr 01, 2012 | 2003 Honda CRF 450 R

3 Answers

Car is overheating after short drive (3/4 hour) had thermostat changed, put new coolant in radiator. radiator was pressure tested no leaks? car ok short drive to store. resevoir seems always overfilled...


The expansion tank will be more full when hot. Let it cool down and check it then. The level in the axpansion tank should go lower. If not then you may have a faulty radiator cap.
Also have you checked the cooling fan? Engine driven? With the engine off, spin the blade. Does it spin real freely? Continue to spin for more than a quick second? May have a bad fan clutch. They have fluid inside and the fluid can leak out of the seals after age.

Sep 02, 2011 | 2002 Dodge Durango

1 Answer

Have an antifreeze leak but not sure where its leaking from, doesn't seem to be hoses or radiator; car leaking under what i think might be the water pump


Yep that a one that will let the job down - the seal can go - what age and has the mix been kept with glycol and inhibitor as water will erode material.
Hard to see where water is comeing from as it leaks from around the shaft behind the pully.
Quite an easy fix which is no real emergency so long as you keep topping up radiator.
Check out replacement or recon existing, the price of some water pumps new replacement makes time and parts spent on repair far too expensive.
On the larger older diesels i have experiece of - the water pump would go whilst working in the day then cause bearing failure which would allow the fan blade to carve up the radiator.
Cost then would escalate, radiator, fan blades, water pump and if you were really unlucky some of the surrounding bits. All good fun

Good luck Owen

Oct 11, 2010 | Chevrolet 1500 Cars & Trucks

1 Answer

2000 Audi A6 radiator fluid leak


? WATER PUMP SEAL.??????

Dec 31, 2009 | Cars & Trucks

2 Answers

Have to put fluid in the radiator and over flow tank about three times a week but don't really see any on the ground where we park. Leak stop was put in by previous owners but doesn't seem to have helped.


the fluid may be goind out the exhaust, look foe excessive moisture out of the tail pipe, if you gotta fill it so often then its going somewhere right? may be sign of a bad head gasket, jut one more thought, are you using anti freeze or just plain water, water evaps quick, and a bad cap will let pressure escape and evaporate quickly, so you will not see a leak, good luck

Nov 28, 2009 | 1997 Oldsmobile Cutlass Supreme

1 Answer

Need to put in new bearing, it is really starting


Bearing on new motor failed for some reason, Make sure the new one will last, check that all shields and water deflecters are in place and that pump seal is not leaking. New motor bearings should be sealed but water has a bad habit of getting into anytging we try to keep dry.
I recomend replacement of pump seal whenever pump is opened and impeller is removed, cheep insurance. Take your time and make sure everything is clean as it goes back together, don't lubricate the pump seal faces, the ceramic faces are designed to be self lubricating and anything (even fingerprint oils) on them can cause a leak.

Aug 01, 2009 | A.O. Smith SQ1102 Pool Pump Motor

2 Answers

Water pump


i had a similar problem... it is possible that when you assembled the oil seals that they did not seat entirely or properly

Mar 24, 2009 | 2004 Yamaha YZ 450 F

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