Felonious Thump
Member
Posts: 204
Same hair line...
West Valley City, Utah
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« on: July 19, 2014, 01:06:22 PM » |
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My little trip down to the edge of Cottonwood creek left the left side of my timing belt cover and that belt shredded. Having never had the front off before I need to know the chances that my left bank will be out of time, and valve problems. I am fairly sure the bike was on its side before the timing cover was done in by a bolder. However i can't be 100% sure. How quick does the tilt switch kill the engine from idle? What do I look for when I get the cover off next week? My back and arm are healing up enough that I think I can clean up the bike, give a complete detailed inspection, and start pulling it apart starting Monday or Tuesday. Unless my honey-do is deemed more urgent by the boss.
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Of all the things I lost I miss my mind the most.
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Pete
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« Reply #1 on: July 19, 2014, 01:30:49 PM » |
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Install a new timing belt correctly, then carefully rotate the engine to make sure there are no metal to metal interference to rotating.
If that works then:
Then do a compression test on every cylinder.
No metal to metal and a good compression test you may be ok.
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Grandpot
Member
Posts: 630
Rolling Thunder South Carolina Chapter 1
Fort Mill, South Carolina
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« Reply #2 on: July 19, 2014, 01:46:26 PM » |
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Pete gave you good advice. The Valkyrie engine is an "interference" engine, which means you may or may not have had the valves collide with the pistons. The only way to find out for sure is to put on a new belt and test it.
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 Experience is recognizing the same mistake every time you make it. |
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Felonious Thump
Member
Posts: 204
Same hair line...
West Valley City, Utah
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« Reply #3 on: July 19, 2014, 02:59:49 PM » |
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I am hoping the kill switch had it stopped. Thanks for the info, guess I will find out.
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Of all the things I lost I miss my mind the most.
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #4 on: July 19, 2014, 03:39:16 PM » |
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What do you mean by shredded. Did the belt break and come off ? If so, there could be a problem. If it didn't, it should be good.
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Brian
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« Reply #5 on: July 19, 2014, 06:04:58 PM » |
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The shop manual is very important here as you can get the valves out of time with the pistons. Use a ratchet wrench to turn the engine crankshaft. I would pull the spark plugs so you know compression is not stopping you verses a valve hitting the piston. Actually, I recommend you pull the head off for a visual inspection first. That way you know for sure there is no real valve or piston damage. These engines are not that hard to remove the heads. Others might disagree, but I have done it. You will need a torque wrench for the low range required and possibly a special valve spring compressor if you have to replace bent or broken valves. I bought my spring compressor through J-P Cycles. It worked great.
Good luck.
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Attic Rat
Member
Posts: 446
VRCC # 1962
Tulsa, OK
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« Reply #6 on: July 20, 2014, 06:43:06 AM » |
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If you think you will need help with the timing belt just send me a PM and I will give you my phone number. I will walk you thru it. It is not a big deal.
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The Attic Rat Performance Works
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gordonv
Member
Posts: 5763
VRCC # 31419
Richmond BC
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« Reply #7 on: July 20, 2014, 04:57:25 PM » |
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Treat the inspection the same as the start of a belt change.
Rotate the engine till the timing marks align. If all align properly, then there is most likely no damage done, unless that one belt slipped completely around the cam 360' and came back to where it belongs (not likely at all).
The belt is strong, and those cams and notches are very strong also. I think it more likely that the belt was damaged, but unless something either jammed the cam or belt, then it did not jump a tooth.
If it did, jumping only one, maybe 2 teeth, and you might be safe. If it jumped a lot, then you could be dealing with damage.
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1999 Black with custom paint IS   |
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Felonious Thump
Member
Posts: 204
Same hair line...
West Valley City, Utah
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« Reply #8 on: July 20, 2014, 07:43:36 PM » |
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The belt did break. So what I gather is I could very easily have valve problems. The bike has 73k on it , so maybe a valve job on both sides for good measure if the left bank is damaged. At one time I was the mountain manager at a small ski area, so I have the tools and know my way around engines. Have not done mechanical work in years but...
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Of all the things I lost I miss my mind the most.
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #9 on: July 21, 2014, 03:17:23 AM » |
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Personally, I wouldn't take too much apart. I'd recommend installing the belts and performing a compression check. That'll let you know if a head has to come off. Hopefully you'll be lucky.
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Felonious Thump
Member
Posts: 204
Same hair line...
West Valley City, Utah
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« Reply #10 on: July 21, 2014, 01:30:35 PM » |
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I think I got lucky. Pulled the damaged cover off, and the belt I thought was severed still had a small string attached. Timing marks seem to line up. I ordered new belts. Should be fine.
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Of all the things I lost I miss my mind the most.
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Chrisj CMA
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« Reply #11 on: July 21, 2014, 02:30:29 PM » |
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I think I got lucky. Pulled the damaged cover off, and the belt I thought was severed still had a small string attached. Timing marks seem to line up. I ordered new belts. Should be fine.
WOW, saved by a thread.........Where is the picture? This closer than close call deserves photographic documentation...............  |
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #12 on: July 21, 2014, 02:46:06 PM » |
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Good, glad to hear it. Its nice to catch a break once in awhile.
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Brian
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« Reply #13 on: July 21, 2014, 05:07:38 PM » |
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Awesome. You got lucky. Pictures would be great.
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Pepmyster
Member
Posts: 698
Go Bonzo, Go!!!!
Mascouche, Quebec, Canada
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« Reply #14 on: July 21, 2014, 05:28:02 PM » |
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Now this is getting interesting........
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gordonv
Member
Posts: 5763
VRCC # 31419
Richmond BC
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« Reply #15 on: July 21, 2014, 09:06:58 PM » |
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WOW!! Great luck.
I was thinking I have spare heads off my wrecked engine. But your later remarks about the alignment marks matching, means you shouldn't have any problem.
Insurance should have covered any problem, shouldn't have it?
Like mentioned, throw a new set of belts, and check your compression. If the good side matches the side with the damaged belt, then most likely no damage happened, and you avoided a possible very big repair.
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1999 Black with custom paint IS |
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Felonious Thump
Member
Posts: 204
Same hair line...
West Valley City, Utah
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« Reply #16 on: July 22, 2014, 10:27:01 AM » |
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I got such a good deal on the bike I went for basic coverage... Damage not covered, OAP. Sorry about lack of photos, I should have done before, after, and after documentation. Got some photos of the bike before it went down   |
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« Last Edit: July 22, 2014, 10:29:04 AM by Felonious Thump »
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Of all the things I lost I miss my mind the most.
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