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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Tue Jan 18, 2011 1:05 am Post subject: Engine out |
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Sooooo I finally started the job to take the engine out my SB6 and check the top end.
I had the engine tunned last year and all was well until about 500miles when I first used it with a bit of fizzz. It developed a tick in the top end at half time to the engine revs.
Anyway all I've done tonight is take the fairings off, drain the coolant and oil.
_________________ Don't read everything you believe |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Tue Jan 18, 2011 7:27 am Post subject: |
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Not teaching you to suck eggs but have you checked you havn't got a blow from the exhaust headers?
It can sound for all the world like a top end rattle
This has happend to me twice.......
bought a bike cheaply because it needed a top end rebuild which turned out to be a blowing header |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Tue Jan 18, 2011 11:05 am Post subject: |
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Yes - when it happened I pulled into a petrol station and that was one of the things I checked but it didn't really sound like that.
_________________ Don't read everything you believe |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Tue Jan 18, 2011 11:25 am Post subject: |
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Both times I was convinced it was a noisy tappet or cam problem after listning to the engine
one occasion it was a broken header bolt, the other occasion it just required nipping up the header bolts.
Worth checking because it's a cheap fix
Fingers crossed for ya |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Tue Jan 18, 2011 1:03 pm Post subject: |
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Well I've dropped the oil which needed to be done anyway and because I didn't warm it first and theres a bit of sludge, I think I'll take the sump off and clean it inside. That will mean taking the rad and Downpipes off so if I find a loose bolt I'll take a view before dropping the engine _________________ Don't read everything you believe |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Sat Jan 22, 2011 5:33 pm Post subject: |
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Well it's not good news
You can see the dark grey of the vavle stem .... and the bright silver round shape which I think is the valve punched through the head.
I've got a man picking it up on Wednesday evening, he'll tear it down and tell me the news. _________________ Don't read everything you believe |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Sat Jan 22, 2011 5:52 pm Post subject: |
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Big ouch
Never seen a valve head the wrong side of the seat before.
Not many miles on that engine is there?
did you have any head work done? |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Sat Jan 22, 2011 7:38 pm Post subject: |
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I don't really want to see that side of the valve at all, yes the head was flowed and it had about 500miles on it. _________________ Don't read everything you believe |
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sapila racing
Joined: 14 Jan 2009 Posts: 67 Location: Athens, Greece
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Posted: Mon Jan 24, 2011 12:34 pm Post subject: |
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That's a shame.
I hope whoever dod the work on the head, will be responsible enough to get it fixed at his own cost. |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Mon Jan 24, 2011 3:10 pm Post subject: |
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Ha !!!!!!
I doubt that's going to happen.
No offence to the guy but it took foooorking ages to get the engine done (over 6 months), and the best I could hope for would be free labour but because he's a one man band I can see this sinking to the bottom of the pile ..... so I've called the guy I wanted to do the work originally and he's picking the bike up on Wednesday. He'll take the bike rather than the engine strip and sort it. I've got a spare standard head but of course I'd sooner use this one, if it's salvageable.
I'll let you know the reason it let go and report back. Feel free to place your bets. _________________ Don't read everything you believe |
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bluedog59
Joined: 14 Nov 2010 Posts: 37
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Posted: Mon Jan 24, 2011 5:24 pm Post subject: |
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That is not good and I would say that head is toast. If one has gone after 500 miles are the rest far behind ? I would have a long chat with the guy that did the head to find out why it has failed if nothing else. |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Mon Jan 31, 2011 10:18 am Post subject: |
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I spoke to the man today - not good news.
Luckily I have a spare cylinder head.
I was under the impression the head had been flowed ... turns out otherwise. Cam timing was out and valve tollerances were very wrong. So, what happened - the cam foller on that valve broke, the valve dropped and the rest (as they say) is history.
From here I've asked the man to port the head and rebuild the engine as he see's fit. He'll have a look at the cam and see if it's usable, repairable or toast. Hopefully the other half of the cam foller will show up in the sump.
Hey ho. _________________ Don't read everything you believe |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Mon Jan 31, 2011 10:44 am Post subject: |
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And I thought I had problems
Question is, who did your cam timing |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Mon Jan 31, 2011 12:38 pm Post subject: |
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Well I know who did it .... but then again I don't know how I can do anything about it. At the end of the day there won't be much come back other than he'll offer to rebuild the engine with free labour .... and would you want that ???? I certainly don't.
I might wander down there and give him a picture of the damage, but as far as anything else is concerned it will be my word against his. _________________ Don't read everything you believe |
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GeeKay
Joined: 29 May 2009 Posts: 1767 Location: West Yorkshire
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Posted: Mon Jan 31, 2011 12:54 pm Post subject: |
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are you doing this on purpose to extend your already extensive media coverage (it's approaching soap opera status on the PB forum) or are you really so unlucky?
Top tip to improve viewer ratings - when you get it completed and running sweetly, arrange for an aircraft to crash on your garage...... |
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