fastbob Posted March 14, 2019 Posted March 14, 2019 Just out of interest when you say you were unscrewing it the wrong way do you mean the sump turned out to be reverse threaded? I've never come across that before but have only ever worked on older vehicles so just curious if thats the case for newer ones Its normal thread sump. I just started unscrewing the wrong way, don't see cover damage hope I just stripped the threads.Anyhow thank you guys it seems I need to get the cover out and just fix stripped threads. If , and it's a big if , you have stripped the bolt and not the thread in the strainer cover then you are incredibly lucky.Its not very likely especially if the sump is alloy and the bolt is steel but stranger things have happened. Quote
Valko Posted March 16, 2019 Author Posted March 16, 2019 Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap. Quote
Westbeef Posted March 16, 2019 Posted March 16, 2019 I've done exactly this, except I was trying to tighten it and went too far.High temp RTV silicone on the threads and it'll seal no problem My temp fix became permanent https://www.amazon.co.uk/Sealpro-ProSeal-80726-Temperature-Silicone/dp/B000FW7VNW/ref=asc_df_B000FW7VNW/?tag=googshopuk-21&linkCode=df0&hvadid=310513207083&hvpos=1o6&hvnetw=g&hvrand=14618368658436732785&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9046623&hvtargid=pla-421610480130&psc=1&th=1&psc=1 It sealed this right up for me; Quote
Stu Posted March 16, 2019 Posted March 16, 2019 Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap. Where did you get u get it all from? I have just discovered shagged threads on the BMW sump! Quote
Bender Posted March 16, 2019 Posted March 16, 2019 [mention]Stu[/mention] Just Google sump repair kit, it's a problem that's often encountered with loads of sets to choose from Quote
Stu Posted March 16, 2019 Posted March 16, 2019 @Stu Just Google sump repair kit, it's a problem that's often encountered with loads of sets to choose from Yeah I know but I like first hand experience of things like thisI was going to helicoil it I prefer a proper repair Quote
megawatt Posted March 16, 2019 Posted March 16, 2019 Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap.You fixed a damaged M14 thread with an M15 thread? Hmmm. Don't think that will last. Quote
Guest Posted March 16, 2019 Posted March 16, 2019 no way would I use a breaker bar on a sump plug I would use a spanner only ...yes, a 1.5m long one...... Quote
Guest Posted March 16, 2019 Posted March 16, 2019 Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap. How did you manage to ensure that no swarf etc. went into the sump? Quote
fastbob Posted March 16, 2019 Posted March 16, 2019 I've Helicoiled plenty of blind holes but never an open ended hole such as a sump drain. What is there to keep the Helicoil insert from turning in either direction when the bolt is turned ? Is it possible that cutting a larger thread is actually the better option ? I hope I never have to find out . I had a look on eBay and there are enough of these kits to suggest that cutting a larger diameter thread is a very common practice. Quote
mikestrivens Posted March 16, 2019 Posted March 16, 2019 article in MCN this week about this sort of problem Quote
Valko Posted March 16, 2019 Author Posted March 16, 2019 Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap. How did you manage to ensure that no swarf etc. went into the sump? Praying. Seriously the tap tool has grooves and I have seen all the swarfs getting into tap tool grooves and going downwards. I have done it in two passes, 1st chasing only to the middle then got out the tap tool and cleaned the swarfs than 2nd time.If there is a little get in, my thinking is the filter is there to stop them yes?My main concern now have I got too deep and drilled something inside, anybody has any idea how deep is the cover and what is the space there? Quote
Valko Posted March 16, 2019 Author Posted March 16, 2019 (edited) Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap. Where did you get u get it all from? I have just discovered shagged threads on the BMW sump! Amazon and because I needed it next day bought this £23: https://www.amazon.co.uk/gp/product/B00DTEM2C8/Otherwise would have bought this half price £11: https://www.amazon.co.uk/Sump-Plug-Thread-Repair-Re-taps/dp/B012B3ZQCA/Otherwise Google "Oil Drain Plug Thread Repair Set M15" if your old is M14. There are may of those different sizes. Very please with it.I didn't have the proper square handle for the tap tool and just used a bit and wrench which was not perfect fit, with the handle you will have precise control on the thread. Edited March 16, 2019 by Valko Quote
bonio Posted March 16, 2019 Posted March 16, 2019 I have read this thread and will probably have nightmares tonight. Praying your fix works out well, [mention]Valko[/mention] Quote
Stu Posted March 16, 2019 Posted March 16, 2019 Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap. Where did you get u get it all from? I have just discovered shagged threads on the BMW sump! Amazon and because I needed it next day bought this £23: https://www.amazon.co.uk/gp/product/B00DTEM2C8/Otherwise would have bought this half price £11: https://www.amazon.co.uk/Sump-Plug-Thread-Repair-Re-taps/dp/B012B3ZQCA/Otherwise Google "Oil Drain Plug Thread Repair Set M15" if your old is M14. There are may of those different sizes. Very please with it.I didn't have the proper square handle for the tap tool and just used a bit and wrench which was not perfect fit, with the handle you will have precise control on the thread. Thats the one I have been looking at although on the BM its an M18 Quote
fastbob Posted March 16, 2019 Posted March 16, 2019 Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap. How did you manage to ensure that no swarf etc. went into the sump? Praying. Seriously the tap tool has grooves and I have seen all the swarfs getting into tap tool grooves and going downwards. I have done it in two passes, 1st chasing only to the middle then got out the tap tool and cleaned the swarfs than 2nd time.If there is a little get in, my thinking is the filter is there to stop them yes?My main concern now have I got too deep and drilled something inside, anybody has any idea how deep is the cover and what is the space there? Should have just poked a stick up it and used your thumb to gauge the depth. Quote
fastbob Posted March 16, 2019 Posted March 16, 2019 Well well well , guess what ? If you were to buy a new sump ,Yamaha have modified it so that the drain plug is now ON THE SIDE ! Apparently the plug is too close to the ground to get a bowl underneath to catch the oil. It's also very vulnerable to being knocked off . That would also explain all the aftermarket sump protectors on the net . Quote
skyrider Posted March 17, 2019 Posted March 17, 2019 get in touch with Yamaha and complain bitterly you might get a new sump out of them Quote
Guest Posted March 18, 2019 Posted March 18, 2019 get in touch with Yamaha and complain bitterly you might get a new sump out of them ..... and then he won the Euro millions jackpot...... Quote
Valko Posted March 23, 2019 Author Posted March 23, 2019 Update: passed MOT Monday, but there is tiny leak.My mechanic told me I managed to make the new thread with very small angle deviation from the vertical.One tiny drop of oil in like 10 minutes. Not happy.He gave me a plastic washer said the plastic can compress unevenly and to take out the leak. I have tried the plastic washer and it started leak a lot more Drained all oil.Today bought Loctite SI5990 Copper Silicone Gasket Maker and put the bolt with regular metal washer and some loctite. Copper silicone is high temp oil resistant stuff it must work yeah?Will add oil again tomorrow and see how it goes. If there is a leak I am going full liquid metal on that drain plug. Seriously pissed off now. Quote
Bender Posted March 23, 2019 Posted March 23, 2019 (edited) I would have tried ptfe on the last 2/3 of threads upagainst bolt head if you follow. Edited March 23, 2019 by Bender Quote
skyrider Posted March 23, 2019 Posted March 23, 2019 yea that will have put a dampener on your weekend Quote
Valko Posted March 24, 2019 Author Posted March 24, 2019 See my previous posts. I found only 1 post and I have to say it is not tremendously helpful mate, unless I miss something Fixed it without removing the cover. Used thread repair tap making the thread from M14 to M15 than put the new 15mm drain plug bolt.It took 2 minutes to make the new 15mm thread with the tap.You fixed a damaged M14 thread with an M15 thread? Hmmm. Don't think that will last. Thank you anyway... Quote
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