Tacho oil leak.

[Cerberus]

Hi. I had oil leaking from where the tacho screws into the head so I ordered 2 new oil seals from Fowlers in Bristol. Both seals are genuine Suzuki parts and I think I fitted them correctly. The fitting is tight and not crossed and now the oil leak is worse than it was before. anybody got any ideas? Cheers.
                                    LATER: Refitted the old outer oil seal and that fixed it (at the moment). What is going on here?

[Watcher]

Not sure, but I have two theories.

1) Is the seal perhaps shaped to fit only one way?

2) Did you wet the seal before installing it?  Just like an oil filter seal needs to have a film of oil on it for it to not leak, o-rings and other rubber seals typically need to be wet for them to work.  If the old seal was wet/dirty that could explain why it was sealing better.

[Cerberus]

Maybe the new seal wasn't wet idk. Still seems weird.

[Watcher]

It's always possible the new seal is defective.

Inspect it for cracks, wet it in oil before installing it, and try again.

[lucas]

If a seal is un-oiled wouldn't it become oiled when it leaked?   

[jdoorn14]

2) Did you wet the seal before installing it?  Just like an oil filter seal needs to have a film of oil on it for it to not leak, o-rings and other rubber seals typically need to be wet for them to work.  If the old seal was wet/dirty that could explain why it was sealing better.

So....you're saying he needs to lick it before he sticks it? 

[Watcher]

2) Did you wet the seal before installing it?  Just like an oil filter seal needs to have a film of oil on it for it to not leak, o-rings and other rubber seals typically need to be wet for them to work.  If the old seal was wet/dirty that could explain why it was sealing better.

So....you're saying he needs to lick it before he sticks it? 

Sure, whatever makes you happy!

[Cerberus]

Be aware that with post. tax etc these two tiny oil seals cost about £16. And they didn't work.

[sledge]

Be aware that with post. tax etc these two tiny oil seals cost about £16. And they didn't work.

More inclined to think you have fitted something incorrectly, damaged something in the process or there is another factor that's being overlooked 

Its good practise to lube the surfaces prior to fitting but all it does is make it easier for them to locate correctly.

Any good close up pics?

[Janx101]

Over-tightening causing seal distortion and thence leakage?