Coolant leak


9 replies to this topic
  • Barbados-WR

Posted August 22, 2005 - 02:45 PM

#1

Sometimes coolant is leaking through small hole below water pump housing located on crankcase cover (right). Anyone know why ?

1998 YZ 400F

  • walent215

Posted August 22, 2005 - 03:31 PM

#2

must be the water pump seal or shaft or both.all easy fixes

  • ONLY4STROKES

Posted August 22, 2005 - 04:25 PM

#3

Yes, you have a blown water pump seal.

  • PurpleHaze896

Posted November 27, 2005 - 02:47 PM

#4

i'm having the same problem as well. I know that i need the oil and water seal and the impeller shaft. I see the shaft and oil seal on this diagram but i dont see which one the water seal would be.

Posted Image

1: SHAFT, IMPELLER
((5JG5)) 298498-001 $23.93
2: IMPELLER, WATER PU
(5NX1) 295711-001 $48.47
3: WASHER,PLATE
(5NX1) 346834-001 $2.34
4: OIL SEAL
(5NX1) 358878-001 $3.00
5: OIL SEAL,SD-TYPE
(SD 12-22-5 HS) 4983-001 $4.47
6: BEARING
(B6001) 1121-001 $11.37
7: COVER, HOUSING
((5JG5)) 295069-001 $44.05
8: O-RING
((5JG1)) 295070-001 $5.88
9: PIN,DOWEL
(USA) 799-001 $0.73
10: GASKET
(5NX1) 796-001 $1.74
11: DISCONTINUED
(6X25) 363933-001
$0.93
12: PIPE, WATER
((5JG5)) 295076-001 $2.94
13: O-RING
(UR YAMAHA) 359108-001 $1.06

  • Barbados-WR

Posted November 27, 2005 - 04:29 PM

#5

#4 is your "water seal" ,#5 is your "oil seal" . Buy those 2 seals along with shaft and bearing #6 . Problems Gone !!!! :applause:

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • PurpleHaze896

Posted November 27, 2005 - 08:25 PM

#6

alright, thanks a lot

  • stvmoto

Posted December 08, 2005 - 08:51 PM

#7

My bike leaks out of the same hole on the water pump.For me I noticed it just recently started leaking.The only difference is it only dribbles out a little bit of water then when the bike gets warm it stops???.......Any ideas anyone???

  • yamaboy23

Posted December 09, 2005 - 08:50 AM

#8

change the seal

  • MotoGoalie

Posted December 09, 2005 - 01:26 PM

#9

Sometimes coolant is leaking through small hole below water pump housing located on crankcase cover (right). Anyone know why ?

1998 YZ 400F


Hey, I was just in Barbados. Where do you ride. I did the Queens Route tour with a bunch of old fogeys. :applause:

  • slopoke

Posted December 11, 2005 - 05:39 PM

#10

ya...same problem...sorry to dredge up this old thread, but i searched first!!...lol....so how do you know which you've blown?? why do these blow in the first place?? i just put the whole bike back together after my motard build and i was riding up and down the block...it started to dribble water out of the little hole....you don't always need a shaft do you?





Related Content

Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
Forums
Photo

First Hare scramble tips by dhend8


Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  33 replies
Forums
Photo

The "going back to the other darkside" adventure... by Monk


Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  94 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.