| Author |
Message |
    
Mrsmichele
| | Posted on Wednesday, January 24, 2007 - 02:11 pm: | 
|
I had the left bolt that mounts the front upper isolator to the head snap off just below the bolt head. One the manual says DO NOT REMOVE. The rest of the bolt backed right out of the head easily so I replaced it with a new bolt from the local Buell dealer. Now I notice a small oil leak coming from between the head and the isolator where I replaced the broken bolt. My questions are. Should I have used a thread sealer? Was there a small metal washer there I could have lost when the bolt broke and didn't notice it during replacement? Anyone know what the torque spec's are on it? Thanks for any help. |
Firemanjim
| | Posted on Thursday, January 25, 2007 - 12:15 am: |
|
Should be no path from inside head through that bolt so your leak is likely the rockerbox. |
Kilroy
| | Posted on Thursday, January 25, 2007 - 06:39 am: |
|
Look in torque spec table at he front of the applicable section in the service manual. XL-style motor torque spec is 75 ft.lb if I remember correctly. As Jim said, there should be no leak path through the bolt hole, but you need to check the torque spec and set the bolt correctly. |
Mrsmichele
| | Posted on Thursday, January 25, 2007 - 07:16 am: |
|
The rocker box upper and lower gaskets have been replaced with the newer gaskets to get rid of the failure prone paper ones. The leak is coming through the head bolt hole. I removed the bolt to check the torque and started the engine. Oil sprays out the bolt hole when the bolt is removed. Defective head? over drilled from the factory? Will a sealer help?
(Message edited by mrsmichele on January 25, 2007) |
Gowindward
| | Posted on Thursday, January 25, 2007 - 08:40 am: |
|
Michele, I think you are on the right path with trying some thread sealer. It's an cheap fix to try. |
Jlnance
| | Posted on Thursday, January 25, 2007 - 09:21 am: |
|
I'm looking at the Blast service manual. The steps to replace these bolts are as follows:
1 - Get new bolts and washers.
2 - Apply red loctite to last few threads of bolts.
3 - Apply a film of engine oil to both sides of washers and bottom of bolt head. Avoid getting oil and loctite mixed.
4 - Tighten bolts to 60 ft-lbs
5 - Loosen bolts 1 full turn
6 - Retighten to 60 ft-lbs
These bolts usually break because someone removed and replaced them. They are one use only bolts. That means you should probably replace both of them. I'd get 2 new bolts and 2 new washers.
If you'd like a service manual, your dealer can get you one, or get one from one of the board sponsors. They are worth their weight in gold.
I looked in your profile and noticed you like the Blast cause its a beginner bike, and you've done 185 on a Hayabusa. Thats an interesting combination.  Are you liking the Blast? |
Mrsmichele
| | Posted on Thursday, January 25, 2007 - 01:14 pm: |
|
I love the blast but will probably go bigger this spring. I just started riding last July. My husband an avid Buell and Harley rider says "if your going to ride, you need to know how to fix and maintain the bike". He helps but I have to try the work and problem solving myself first. I've already ordered another set of bolts and lock washers from the dealer. And my PDF downloaded manual I printed doesn't cover the head bolt replacement in the upper isolator. I'll pick up the red locktite and see what happens. I did see a revision on the torque spec's from 75 to 60 lbs and they say to tighten fully back it out a 1/4 turn then tighten to 60 lbs. I still don't understand how oil is getting through the head to this bolt hole and I'm not inclined to drop the engine to find out. The service tech just looked puzzled when I told him my problem. |
Court
| | Posted on Thursday, January 25, 2007 - 01:29 pm: |
|
If someone told you there was a .pdf "download manual" they were funnin' ya.
The Factory Service Manual is delivered in a bound printed version only.
Was this the same person who owned the "Yamaha Hayabusa?"
Go get'em! |
Jlnance
| | Posted on Thursday, January 25, 2007 - 01:38 pm: |
|
If you're using the same version of the manual as I am, it's described in figure 3-40 on page 3-21. |
Troubleshooting (Poor Starting/Running/Handling/Ride Issues) »
Archive through February 28, 2007 »
2001 blast isolator/head bolt oil leak?