WR400 Oil Leak
Posted August 06, 2006 - 07:56 AM
The oil seal behind the front sprocket was leaking oil. I replaced the seal and it was still leaking, and when the bike comes off tick over it seems to pump the oil out. i then checked all the breathers and put another seal, O-ring and spacer behind the front sprocket. This still did not cure the problem. I then put a new piston and rings in, i also had the barrel re-plated because the old one was worn. i then put in another new oil seal and this has not helped in any way the oil is still coming out. I have also checked the oil level and it is ok and all the oil lines and filters are clear.
Please Please Please Help
Posted August 07, 2006 - 04:19 AM
If this is not the case, then I would assume that something could be wrong with the shaft causing the seal to work improperly. How tight are you running your chain?
Hope this helps.
Posted August 07, 2006 - 05:53 AM
I have no idea what could cause this and would appreciate any suggestions on what the fault could be.
Posted August 07, 2006 - 06:25 AM
Posted August 07, 2006 - 09:04 AM
Posted August 07, 2006 - 09:13 AM
Are you sure you have the seal in the correct way? All the way seated?
Verify your installation process with the manual, and look at some on line micro fisches for diagrams.
What does the seal look like when you take it out? Are you putting a little grease on the inner lip where the shaft goes through?
Keep us posted
Posted August 07, 2006 - 09:20 AM
After the first seal i put in was leaking I then replaced the o-ring, sleeve and i put another new oil seal in. i also have checked she shaft for play and there was not any. This did not fix the problem. i was then told it might be crankcase pressure due to worn piston, rings and sleeve these were all replaced along with another oil seal and it still leaks. I have no idea of what can be causing the oil to leak out and am extremely grateful for any advice.
There should not be any crankcase pressure even with worn rings. The motor basically is open vented via the breather hose unless perhaps the hose is blocked?
Posted August 07, 2006 - 12:43 PM
Unfortunately i cannot post any pictures at the moment but i don't think they would help much as everything looks fine.
I really appreciate the help you are giving me and i hope someone out there has heard of a fault like this and has a solution.
Posted August 07, 2006 - 02:41 PM
Double check your part numbers and also look at the part numbers for different years of bikes to see if they change. Was there / did you replace the bearing on the shaft by chance? Could it be that you installed the bearing backwards?
I would look up some info on line for you, but I am stuck here in dial up land until work in the morning.
Posted August 07, 2006 - 03:13 PM
Posted August 08, 2006 - 05:22 AM
Posted August 08, 2006 - 08:58 AM
when i can get a camera what sort of picture would help?
Thanks for all your Help
Posted August 08, 2006 - 11:27 AM
The oil pressure is only used to get the oil to the parts that need it, the transmission and bottem sump area are not presurrised.
One thought might be that if the bearing for the shaft was taken out, it might not be ligning up correctly with the oil hole in the shaft. Or seals might not be correct.
There is supposed to be a washer behind the bearing, then the bearing, then the seal, then the seal retainer. Just trying to clarify.
Posted August 09, 2006 - 01:27 AM
The bike is a wr400f 2000 model do you know what the part number should be for the oil seal so i can compare it with the number on the new seal when it arrives.
Also is there any way of checking that the bearing is in correctly with it in place or would i have to take it all apart?
Thank you very much for all your help this fault has me totally confused
Posted August 09, 2006 - 03:28 AM
24 BEARING (5GS5)
25 OIL SEAL (5GS5)
Take a look here
Old seal in place, shaft with no seal, old seal side by side with new seal (front & back & side)
As for the bearing, I am not sure how it goes in, I guess I would assume it can only be removed when splitting the cases and removing the shaft.
Have you noticed anything strange when changing the oil filter?
Sorry I can't be more helpful. I am not sure as to what would be the cause. Another thing to consider is to look around your area for others that ride and see if they can help, maybe see a dealer?