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| Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions. |
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#1
28 May 2007
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Stripped oil filter bolt hole
Here's my problem: The ham fisted individual who owned the '90 XT before me decided it would be a great idea to tighten the bolts for the oil filter so tight he stripped the one in the 10 oclock position. I've owned it for about 3 weeks now and decided to change the oil today and discovered the bolt extremely loose. That would explain the ever so slight coating of oil on the left crankcase. Upon attempting to retighten it I found nary a thread to tighten it into. Any Suggestions out there in ultra smart XT land? How far are the threads into the case, can I just get the next longer bolt and get to the threads that aren't boogered up, ETC......... Any help will be a appreciated......
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#2
28 May 2007
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Strip thread
There was a thread or two few weeks ago. Some very nice solutions. Do a search. Cheers.
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#3
28 May 2007
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Two
Solutions:
1. Helicoil the damaged thread 2. Helicoil + install a thread end, so that you do not tighten the cover with the bolts but with a nut Both involve removing the clutch cover. Inserting a longer bolt is NOT a good idea; if you damage the inner engine casings you will be looking at major surgery to get your bike on the road again. You say a slight film of oil on the LH side; assume that is looking from front to back? :-) Auke
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#4
28 May 2007
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two good sugestions from aukboss, there should also be enough meat in the casing to drill out the hole and tap it out to 8mm, a much cheaper option if you dont have a helicoil kit already.
personally i would go with the helicoil and locktite a stud in there, then you will only ever disturb the nut and not the thread in the casing.
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dave
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#5
28 May 2007
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As the guys say, a helicoil is the way to go - it's an easy and very quick job.
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#6
28 May 2007
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Thanks for the ideas guys! You are the cat's meow! Sorry about the left side statement I I meand there was a film "Left" on the crankcase. I have no helicoil stuff available so I pulled the cover and found there was some threads left down there past the stripped ones. Will be heading to the store to find some studs to loctite into there. THanks, again, for the sugestions
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#7
28 May 2007
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Good reading
Here's another thread for the same issue (and there may be more) - worth a read before you go firm on your plan?
http://www.horizonsunlimited.com/hub...l-filter-22255 Cheers, Dave
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Dave
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#8
28 May 2007
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I think it is better to use a timesert better then a helicoil.
It would also be an idea to check the other 2 threads and get the fixed at the same time if needed.
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#9
29 May 2007
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Time Sert is definitely to prefer over Helicoil for one major advantage: Time Serts (properly fitted) can't dislodge and unscrew themselves. Helicoils sometimes do and the result might be a case for the well equipped enginering shop (TIGweld & mill) or Yamaha parts salesman.
Helicoil sets are dirt cheap. If you can't afford them then go to a workshop instead of messing with your bike using inappropriate tools. Time Serts unfortunately require VERY expensive tools which makes them a No-NO for hobby mechanics and even small workshops. Find someone who fits them for you. I'll do it for you if you come to Cape Town  You can get an extra long Helicoil fitting tool kit for suitable for retapping the XT oil filter bolts threads without taking the clutch cover off.
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#10
29 May 2007
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Mine too
2 of my oil filter cover bolts were stripped when I bought my bike.
Take the right side case cover off, it only takes about 45 mins. (you'll need a new gasket) and helicoil all 3 of them. If they aren't strpped yet they will be soon enough, just do all 3 now. You can get longer helicoils if your concerned you won't get enough purchase. All up it's about a 2 hour job in the garage or about an hour in a real workshop.
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