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HELP! Cracked oil drain bolt location

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ImageUploadedByThumper Talk1402280219.674181.jpgImageUploadedByThumper Talk1402280233.145683.jpg my drain bolt wouldn't tighten so i figured the threads were stripped and planned on doing a helicoil fix. I opened it up and found that it was cracked along the top where the bolt threads in:( do i need to replace the case?

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Someone could probably weld that up.  You could then see if just running a tap on the threads would get the bolt to tighten; If not, then try the helicoil.  Wouldn't cost much to see if it works, versus the notable cost of a replacement case and the associated labor costs, misc gaskets (I'd change main bearings and seals if I had to split the case too.  You should be able to get to the end of the crack, drill it out with a small bit to get crack to stop, then call around to some places that do aluminum welding.  I'd dremel the crack too before welding it.

Edited by mch

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$264 for a new right side case from Motosport. I will probably go this route. I don't want to "mend" something like this. And all this right before a 4 day fathers day trip:/ oh well stuff happens for a reason right?

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Someone could probably weld that up. You could then see if just running a tap on the threads would get the bolt to tighten; If not, then try the helicoil. Wouldn't cost much to see if it works, versus the notable cost of a replacement case and the associated labor costs, misc gaskets (I'd change main bearings and seals if I had to split the case too. You should be able to get to the end of the crack, drill it out with a small bit to get crack to stop, then call around to some places that do aluminum welding. I'd dremel the crack too before welding it.

after doing some research i think i will go with your suggestion. Id be in around $800 i figure if i bought a new half case, split the case and had to put it all back together (time). I work with welders so I'm going to see if they could help me out.
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after doing some research i think i will go with your suggestion. Id be in around $800 i figure if i bought a new half case, split the case and had to put it all back together (time). I work with welders so I'm going to see if they could help me out.

 

I think that's the way to go.  It looks like that crack is accessible to be welded and it isn't in a spot where it has to be to machine tollerances.  You just got to get the bolt to tighten and don't want more cracking.  Let us know how it comes out + pictures would be cool.

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ImageUploadedByThumper Talk1402454151.315850.jpgImageUploadedByThumper Talk1402454164.912753.jpgwent with the helicoil. I still need to hit the end of the crack with a small drill bit. Like you mentioned, the bolt just needs to tighten and hold oil, i dont even know if it needs to be welded.

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Thanks for the suggestions. Just ordered my gasket for the cover and some fresh oil and trans drain bolt washers (and a roost deflector too):) cant wait to put it all back together. I will have to miss the trip i had planned, but there will be more to come for sure.

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ImageUploadedByThumper Talk1402455778.366569.jpgjust ordered some alumibond. Might use it on the crack for a little insurance.

ALUMFAST® is a fast curing repair kit used for aluminum and copper pipes, valves, models, patterns and castings. HY-POXY® ALUMFAST® can be machined, sanded, drilled and tapped which makes it a popular choice for automotive, plumbing and HVAC repairs.

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attachicon.gifImageUploadedByThumper Talk1402454151.315850.jpgattachicon.gifImageUploadedByThumper Talk1402454164.912753.jpgwent with the helicoil. I still need to hit the end of the crack with a small drill bit. Like you mentioned, the bolt just needs to tighten and hold oil, i dont even know if it needs to be welded.

 

I was thinking that crack wasn't in too critical a spot, but I'm guessing if you did nothing it might fatigue later on and who knows what that could lead to.  That epoxy should work, but hope it never comes off.

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Yeah im going to scuff the area when i apply it and make sure it has good adhesion. Thanks again for the helicoil and drilling the crack idea.

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