Question about 2004 Honda CRF 450 R

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2004 Honda CRF 450 R water pump leaks

My water pump on my 2004 CRF 450 leaks how can I stop it?

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Hi, Lanepitts48 for this scenario you will need your service/owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one. 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.
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Posted on Jun 28, 2017

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Posted on Jan 02, 2017

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SOURCE: 2004 honda crf 450 r

Your gear are worn out, you wil have to reaplace the gear, beter let a good motorbike machanic do it. very easy to mess it up

Posted on Mar 31, 2009

  • 3433 Answers

SOURCE: 2003 crf 450 leaking coolant from hole from the bottom of the case under the water pump. What does this indicate?

It means your water pump seal is seeping at this point. Eminent failureportended. Replace water pump. Seals on pumps usually fail because of bearing wear, so this is a precursor to pump shaft failure. Good luck

Posted on May 27, 2009

  • 3567 Answers

SOURCE: Valve Adjustment for 2003 Honda CRF 450 R

This should help.
Please rate this answer, thanks.

Posted on Jul 25, 2009

  • 3567 Answers

SOURCE: 06 CRF 450 that went under water, not getting fuel to plug

Chances are the air filter is extremely wet. Air can't get through a wet filter, and if no air can flow through the carb, no gas can flow through either. Remove the filter and try again to get the engine started. I assume you drained and cleaned the gas tank already. If still no joy, remove the carb and clean it using spray carb cleaner. Remove the air screw and throttle screw and spray into the screw holes as well as all the little drill holes in the carb body. The object here is to clean out the pilot jet and idle circuit. When re-assembling the carb, put the air and throttle screws back in and turn them inward until they LIGHTLY seat. Now open each of them up one and one half turns. This is the factory setting. Please rate my answer.

Posted on Feb 23, 2010

  • 61 Answers

SOURCE: I have a 2006 CRF 450, at the track I noticed a

yes sir the seal hole should not be oblong, was the bearing bad when you took it out? sounds like the shaft has worn out the hole.

Posted on Apr 08, 2010

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1 Answer

2006 yz450f coolant leak water pump weep hole

Take compressed air and blow air up into the the weep hole. For some odd reason it made 3 different CRF's stop leaking. It's worth a shot.

Apr 08, 2014 | 2004 Yamaha YZ 450 F

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Bleeding the rear brakes on a honda crf 450

Push brake down crack the bleeder let it spit into something with brake down still close the bleeder. Make sure the reservoir is full when doing this. It only took me 5 tries and I was done. If you pump multiple times then crack the bleeder it will take you all day.

Dec 11, 2011 | 2004 Honda CRF 450 R

1 Answer

Hi. I have a Honda crf 450 r 2004, and I discovered that there is water from the cooling system in the oil. I can see it thru the inspection glass of the engine. Where is the leek?? Please help...

there is really only two ways for oil to enter the oil (1) is the oil and water seals fitted on the water pump impellor or (2) the other is head gasket leak
the most common on MX bikes is the oil and water seal at the impellor (water pump)
if your not to mechanical minded then both of these issues you would be best to take to dealer to rectify as they bit tricky to do with out experience.
if you are mechanical minded then either problem is fairly cheap to fix about $25 for the oil water seals or about $70 for the head gasket
let me know if you want me to elaborate on either issue
good luck regards Jamie

Jun 15, 2011 | 2005 Honda CRF 450 R

1 Answer

Water weeping from the overflow weep hole in the water pump

that is not an overfill hole it is a seal and bearing drain hole, this means the shaft seal has failed, u will need to replace the water pump

Apr 17, 2010 | 2004 Honda CRF 450 R

1 Answer

2004 crf 450 r atifreeze in the oil and put new water pump and all that in it and they say it needs head gasket but if that dont work does that mean the blocks cracked

You may have put the seals in backwards. They must go in a specific direction. If that is ok, is the water on the right side oil, or left side oil? Right side you have a seal problem, Left side you have a head gasket. The cylinder wont crack unless destroyed. Replace head gasket and the bad oil on bad side. Chaz Moto DC

Feb 25, 2010 | 2004 Honda CRF 450 R

2 Answers

I think water go in to the engine oil of my bike, what can cause that? crf450, 2004

Water pump oil seal is not a possible cause. Even if the water and oil seal were so worn out that the coolant passed through both seals the weep hole in the crankcase cover would have to be completely stopped up and sealed. In that case it would leak into the transmission oil not the engine oil. The coolant leak would likely be in the cylinder/head area.

Nov 05, 2009 | 2004 Honda CRF 450 R

2 Answers

Water flows out from the hole below the water pump cover

seal is going bad, as the other post stated. IF your bike is older than 2005 then replace the water pump impeller with an 06 model or drill a 3mm hole in between 2 fins. without the hole the impeller builds too much pressure on the back side pushing water through the seal.

Sep 27, 2009 | 2004 Honda CRF 450 R

1 Answer

2004 crf450 leaks antifreeze from under waterpump case and a little from neck coming out of head


Jul 27, 2009 | 2004 Honda CRF 450 R

1 Answer

2003 crf 450 leaking coolant from hole from the bottom of the case under the water pump. What does this indicate?

It means your water pump seal is seeping at this point. Eminent failureportended. Replace water pump. Seals on pumps usually fail because of bearing wear, so this is a precursor to pump shaft failure. Good luck

May 27, 2009 | 2003 Honda CRF 450 R

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