HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
skwerlee

stripped crankcase bolt!!!

7 posts in this topic

I need to know if it's possible to drill and tap the rights side crankcase cover. I was threading the bottom bolt that drains oil and holds the Oil filter cover on the side of the crankcase and I accidentally cross threaded it…DOH!!! I need to know if I can drill this out with a drill press and maybe tap it or install a HeliCoil? I found a new crankcase cover for $217.00 on Partsfish but if I can repair this for free then that would be great. Any help would be most helpful.

Share this post


Link to post
Share on other sites

Yes, you can repair it. This particular bolt hole is commonly stripped (Mine too). Get the 6mm x 1.0 helicoil kit. Place your bolt through the oil filter cover hole (with it off of the side cover) where it goes. Then measure the distance of the bolt that is visible through the cover, so that you can mark your drill bit the same distance. This way, you won't drill too far. Tap your hole. If you've never tapped before, be slow and careful. Lubricate as you go, and back the tap out 1/2 a turn for every turn you go in to release the thread waste, so it doesn't jam. If you use the 1/4 inch long helicoils, you will need to use two. They hold great. You will need to remove your cover either before or after you do this to remove any shavings from inside the case or hole. This hole does penetrate the case, so the shavings could end up in your crankcase if you don't.

Share this post


Link to post
Share on other sites

If you crossthreaded it try just running a tap through there. :) If that dosent work chhose one of the methods.

Share this post


Link to post
Share on other sites

Thanks for the help guys. Does anyone know if a helicoil will work as well as a timesert?

Share this post


Link to post
Share on other sites

I think i'm gonna go with the timesert, will the m6 x 1 allow me to used my exsisting drain bolt?

Share this post


Link to post
Share on other sites
Thanks for the help guys. Does anyone know if a helicoil will work as well as a timesert?

Timesert is the fix for this - it holds up a lot better :)

it will also solve the common YZF problem....with the oil debri in the drain hole that wears all the threads out over time. Also from too much torque -

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0