CRANK SEAL REPLACEMENT
CRANK SEAL REPLACEMENT
Hi guys
engine now running but spewing oil out of both cans-- only light blue haze from the left but obscuring smoke from the right hand even after 20 mins warm up The more it was revved the more of a smoke cloud from the r/h can and both cans still spraying oil.
General concensus is crank seals gone and r/h prob sucking in gearbox oil as well.SILLY QUESTION to which i probably know the reply----can you replace the seals without splitting the cases>
I read the manual through re disassembly of bottom end but photos and text seem to jump stages and aren`t really that explanetery.
A blog with a series of pics on this subject would be great ---any takers?
engine now running but spewing oil out of both cans-- only light blue haze from the left but obscuring smoke from the right hand even after 20 mins warm up The more it was revved the more of a smoke cloud from the r/h can and both cans still spraying oil.
General concensus is crank seals gone and r/h prob sucking in gearbox oil as well.SILLY QUESTION to which i probably know the reply----can you replace the seals without splitting the cases>
I read the manual through re disassembly of bottom end but photos and text seem to jump stages and aren`t really that explanetery.
A blog with a series of pics on this subject would be great ---any takers?
YOU GET MORE POKES WITH TWOSTROKES !!
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
Re: CRANK SEAL REPLACEMENT
can't remember now, but i don't think you can get the gear off the end of the crank easily, so therefor can't replace the seal, or at least not a diy job, would await the experts though.
Re: CRANK SEAL REPLACEMENT
ok fella thanks for the reply--i hope some clever geezer on here has found a way to do it and lets us know--you never know with a bit of luck it may not be the seals leaking--has anyone used a leak down test kit to confirm this problem??
YOU GET MORE POKES WITH TWOSTROKES !!
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
Re: CRANK SEAL REPLACEMENT
If there is smoke coming from both sides there is a possibility that the inner seals are leak ( the inner shaft is worn)
In both times you must split the cases.
In both times you must split the cases.
Kr1s C1 zeus blue
ZXR400 SP
ZXR250A
ZXR400 SP
ZXR250A
Re: CRANK SEAL REPLACEMENT
hi jarno thanks for the reply--bit strange this one----i changed the right hand carb(still don`t know why)For a spare i had lying around to see if the engine would start after weeks of possible ignition problems and still no start but now plenty of spark----i gave it one kick and the engine burst into life.
the engine did NOT blow smoke or oil spray previously when it was running until i fitted this r/h carb!!!!!!!!!!!!!!!!!!!!!!!!!!!
tomorrow i will refit the original carb and we will see what we will see(probably through a blue haze!!)
the engine did NOT blow smoke or oil spray previously when it was running until i fitted this r/h carb!!!!!!!!!!!!!!!!!!!!!!!!!!!
tomorrow i will refit the original carb and we will see what we will see(probably through a blue haze!!)
YOU GET MORE POKES WITH TWOSTROKES !!
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
Re: CRANK Shaft cog
hi i got the cog off using a sturdy bearing puller from jago, on amazon about 30 quid ,first i punched a straight line from cog to end of shaft using an i letter from letter punches as a reassembling guide,then pulled it off using puller.
Re: CRANK SEAL REPLACEMENT
hi beezer-thanks for the reply--is the cog an interference fit? or is it on a keyway? AND--
did changing the outer seals sort the problem(i`m assuming it was smoking badly?) or not?
did changing the outer seals sort the problem(i`m assuming it was smoking badly?) or not?
YOU GET MORE POKES WITH TWOSTROKES !!
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
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Re: CRANK SEAL REPLACEMENT
you need to split the cases to change the seal,as the seal has as sort of lip that fits inside a groove in the cases
You know it's cold outside when you trip over dog shit instead of standing in it.
Re: CRANK SEAL REPLACEMENT
Yes Jarno-- i thought that might be the case(no pun intended!!)i`ve just found a picture of a seal and i can see that it has a raised profile on the outer seal surface obviously there to lock the seals in place under compression.
Lets hope i don`t have to fork out for a crank rebuild and the smoky cans settle down with a little more running at temperature.
Lets hope i don`t have to fork out for a crank rebuild and the smoky cans settle down with a little more running at temperature.
YOU GET MORE POKES WITH TWOSTROKES !!
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
KRI
CBR250RR
CBR400RR NC23
vfr400 nc30
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