SV Talk, Tuning & Tweaking Discussion and chat on all topics and technical stuff related to the SV650 and SV1000 Need Help: Try Searching before posting |
|
Thread Tools |
14-06-22, 02:33 PM | #1 |
Member
Join Date: Mar 2022
Posts: 42
|
Engine won't turn - stuck.
Yesterday I balanced the carbs on my partner's recently acquired K1. 17k miles, tidy bike. I fitted a hose to the front cyl intake. I did not take the carbs off. Got the carbs set, & finished yesterday evening putting the airbox back on. I had to turn the idle speed down after finishing, but it seemed a little more difficult to start, so I was interested to see how it started this morning.
It turned over for a fraction of a second & then there was a solid clunk. The engine is stuck. I've taken out both spark plugs & took the starter motor off. No sign of any damage. I can't turn the engine with the back wheel, forwards or backwards. If I've managed to drop something into a cylinder it's happened fitting the airbox, but if so it's immediately got past a carb slide.....??? Suggestion as to what to do next? |
14-06-22, 10:37 PM | #2 |
Member
Mega Poster
Join Date: Apr 2005
Location: Sunny Swindon
Posts: 3,570
|
Re: Engine won't turn - stuck.
I've not experienced this myself but it sounds a little odd that it started and then wont turn over the following day even with the spark plugs out and turning the rear wheel. If the engine is suspected to be stuck then while I would think to test directly by turning the engine from the fly wheel as done to set the cams but that might not be the best thing...
If you were in the carbs then I'd go there and start looking. Take the carbs off and see if there is anything trapped in the inlets. Check that the hoses are all still correctly connected and the balance pipe is blanked back off. Do you have a bore scope or way of looking into the bores while the plugs are out to ensure that there is nothing in there? I'd also be tempted to take the valve covers off to see if there is anything obvious there in case there is a stuck or bent valve or the cam chains are still attached and tight. Hopefully this will be a simple fix to a simple problem but I expect you'll need to do a bit of time consuming investigations and take it slowly step by step. |
14-06-22, 10:42 PM | #3 |
Member
Join Date: Mar 2022
Posts: 42
|
Re: Engine won't turn - stuck.
I don't have a borescope. They can had be had fairly cheap I believe.....may have to get one. I basically agree with all you've said.
|
15-06-22, 03:08 PM | #4 |
Member
Join Date: Jan 2019
Location: N W Leicestershire
Posts: 249
|
Re: Engine won't turn - stuck.
If something fell into a cylinder it would surely still try and turn over and you would hear about it. it was obviously in gear when you turned the rear wheel, and presumably you did try it in neutral on the starter motor? I presume the starter motor spins ok disconnected from the engine A locked gearbox would give the same symptoms . Keep us informed of progress.
Good luck |
15-06-22, 05:11 PM | #5 |
Member
Join Date: Mar 2022
Posts: 42
|
Re: Engine won't turn - stuck.
I went to see a Mech engineer who has a machine shop. He recently did a job on carbs. He's puzzled why the engine won't turn in either direction. He's wondering timing chain. He's suggested a couple of things to try.
|
17-06-22, 11:06 AM | #6 |
Member
Join Date: Mar 2022
Posts: 42
|
Re: Engine won't turn - stuck.
The front cylinder intake was full of fuel. So when engine started to crank it filled the cylinder. I'm not sure why...
|
17-06-22, 11:45 AM | #7 |
Member
Mega Poster
Join Date: Jun 2016
Location: NE Lincs
Posts: 1,069
|
Re: Engine won't turn - stuck.
If the seals on the vac operated fuel pump have failed and a float valve stuck in a carb it can do that.
__________________
2016 SV650AL7 2023 GSX-8S |
17-06-22, 11:56 AM | #8 |
Member
Join Date: Mar 2022
Posts: 42
|
Re: Engine won't turn - stuck.
|
17-06-22, 01:15 PM | #9 | |
Member
Join Date: Aug 2007
Location: nr. Ashby-de-la-Zouch
Posts: 321
|
Re: Engine won't turn - stuck.
Quote:
Also, it's possible that the problem was there before you bought the bike and just hadn't been noticed. If the 'leak' is minor it might take some days for sufficient fuel to pass to cause a problem so if the bike was used regularly it would never show itself. Maybe the agitation from removing and re-fitting the airbox allowed more flow than 'usual'? (speculation) From memory the front cylinder is lower than the rear and of course differently inclined, so maybe that just meant more fuel gathered there? (more speculation) My last curvy seemed to have a similar starting problem occasionally but it was totally fine if the bike was used for day-to-day commutes - it usually only 'struggled' on Monday mornings if it had been stood over the weekend. (Battery & usual reg/rec possible issues were eliminated throught fault-finding!) Sadly I never fixed it fully because I was knocked off and the bike was scrapped. But I was considering just fitting an old fashioned on/off fuel valve on the tank outlet pipe that I could use for longer lay-ups - more a bodge than a proper fix though. Checking and changing seals on vac operated bits is probably the right answer.
__________________
Spannering the wife's SV650S K5 pointy in Black, and son's SV650 X curvy in Blue. RIP SV650 X curvy, crashed and written off December 2019. I'm (procrastinating about) fixing up an old Yamaha FZ600 to get myself fully back on the road. |
|
17-06-22, 01:19 PM | #10 | |
Member
Join Date: Aug 2019
Posts: 48
|
Re: Engine won't turn - stuck.
Quote:
This phenomenon (called 'hydrolock' from hydraulic lock) is fairly common on Kawasaki Concourses, caused by a combination of crappy petcock and leaky float valves, and has been known to cause bent rods.
__________________
65 CB160 (67-69), 69 350GTR (69-72), 72 R5, 73 RD350 (73-84), 82 XZ550 Vision (84-03), 01 Concours C10 (03-19), 89 EX250 (11-14), 00 SV650S (14-16), 03 SV650S (19-) |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Turn the key, only the side lights come on! Plz help - I am stuck at work | ron2580 | Bikes - Talk & Issues | 16 | 04-06-13 10:44 AM |
K3 Engine fix - water pump stuck - help! | muzikill | SV Talk, Tuning & Tweaking | 19 | 06-02-11 10:50 PM |
Engine removal - stuck, help! | muzikill | SV Talk, Tuning & Tweaking | 26 | 30-08-10 04:52 PM |
Running an engine with a stuck choke | Caddy2000 | SV Talk, Tuning & Tweaking | 11 | 31-08-07 02:36 PM |
clutch sticking in gear until I turn off engine??? eh? | GooseSVSK2 | SV Talk, Tuning & Tweaking | 2 | 17-07-06 10:23 AM |