XR400 Cracked Case at Oil Drain

Whats the fix for my cracked case at my oil drain hole? I torqued my drain plug too far and cracked the case at the bottom of the threads for the drain plug.

Whats the fix for my cracked case at my oil drain hole? I torqued my drain plug too far and cracked the case at the bottom of the threads for the drain plug.

You cracked the case or you stripped the threads? Helicoil? :smirk:

If you're sure it's a crack and not a casting mark that you didn't happen to notice beforehand, then I think the first thing I'd try is patch the area with J B Weld and fiberglass cloth.

I definitely cracked the case at the bottom of where the bolt screws in. I am sure its a crack, oil is leaking out like mad.

As long as the threads will still hold the drain plug securely, TR42's JB/cloth suggestion should work.

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