Anyway of fixing an oil leak at bottom of engine of my Yamaha without tearing the entire engine apart.?

Question

Bumped the engine off a railway track and now it has a slight leak at the two halves of the bottom by the oil plug. Read manual and it doesn't even show a gasket and looks like the only way to get the two halves apart is to strip the entire engine down. Just wondering if anyone has any ideas. Thanks

Answer 1

I think what the person above may be talking about is "Liquid tape". It can be used to repair cracked gaskets and assist with re-sealing leaky spots.

If the gasket is really the problem this might work. However, this may not be the problem. Sadly, my knowledge of motorcycles engines is relatively elementary given that I only recently started learning.

I'm afraid I can't offer any more ideas.

Answer 2

If you had provided model or engine type it would have been easier to answer your question. Sorry to say, but, it sounds as though you have cracked your engine case and that is not good. Your options are: try some sort of epoxy or other sealant goop which may or may not hold over time, have the crack welded or replace the cracked part which means a time consuming and expensive repair. At this point you should wash and degrease the underside of the engine then completely dry it. Wait or ride it a short distance if you have to and check frequently in order to determine exactly where the leak is coming from. I have known people to think they have an oil leak only to find that it was excess chain lube dripping off, hopefully you will be as lucky.

Answer 3

The right way to seal it is to tear it apart. There is no gasket between the case halves. It is sealed with a silastic sealer available at bike shops, usually a 3M product in a squeeze tube.

You could possibly clean and dry the case and just smear a good quality RTV sealer over the area providing there isn't much damage. The secret would be CLEAN and DRY!

Otherwise, well you know the rest...

Answer 4

Make absolutely certain that the leak is that joint! you know oil always follows down around the engine and you have to trace it back up. if it is it sounds like the case is bent and taking it aprt and putting it together probably won't fix it. a patch repair may be in order. i have heard great things about a product called JB Weld. some kind of metallic epoxy. have to drain the case and flush clean and dry and then cover it. probably work.

Answer 5

There used to be a product, a liquid, that help seal small leaks. Don't remember the name, but they had a whole line of products for every fluid in the car. The cap was the color of the fluid, so it made picking the right one idiot proof. Not sure if this product is still on the market. Try a bike shop or an auto parts store.