Not my engine but tought it was fitting for this occasion.
Bought the bike second hand, did exactly 10km's with it and then this! Comes to 600euro's per km I've driven
.Seized engine
- Thread starter BelgiqueBasterd
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Not my engine but tought it was fitting for this occasion.
Bought the bike second hand, did exactly 10km's with it and then this! Comes to 600euro's per km I've driven
.Re: What makes a grown man cry?
Here come the questions
-Are the liners interchangable from the 2001 to 2008 range? I've got a couple lying around but don't know there exact year of manufacturing.
-Already know the answer to this question but gonna ask it anyway, how critical is the separation between the crank and the gearbox? In other words do I need to have my cases welded/machined or can I run the engine with the missing piece?
-Should I reuse the conrod? Is there any way to have it tested for straightness as I reckon that it got a pretty good bang when the piston let go?
-In the last picture, is there a piece broken off, or is that edge just scuffed from moving pieces of piston/liner? A picture of the inside of 2008 empty cases would be very helpfull.
-Any other things I have to check before reassembly?
Here come the questions
-Are the liners interchangable from the 2001 to 2008 range? I've got a couple lying around but don't know there exact year of manufacturing.
-Already know the answer to this question but gonna ask it anyway, how critical is the separation between the crank and the gearbox? In other words do I need to have my cases welded/machined or can I run the engine with the missing piece?
-Should I reuse the conrod? Is there any way to have it tested for straightness as I reckon that it got a pretty good bang when the piston let go?
-In the last picture, is there a piece broken off, or is that edge just scuffed from moving pieces of piston/liner? A picture of the inside of 2008 empty cases would be very helpfull.
-Any other things I have to check before reassembly?
Re: What makes a grown man cry?
I cry with you
Just came in from a tappetadjustment on my beloved 501 -99 and thinking to change the piston now after 290h.
Regards
Jampe
I cry with you
Just came in from a tappetadjustment on my beloved 501 -99 and thinking to change the piston now after 290h.
Regards
Jampe
Joined Jun 2007
4K Posts | 1K+
south east WA Australia
Re: What makes a grown man cry?
it would run open just like a lifan 125 id fix the RHS case between the gearbox and crank there is not much load on that bit it should not be a problem to fix
the other brocken bit on the case was just a baffel for the reed valve passage doesn't matter I think.. could be wrong
you can test the big end for wear by twisting the rod to look for movement and can wash out all the oil with a solvent then hold the crank in the air with one hand by the rod, hit the top of the rod downward with your other hand if it rings its got some play.
you can't see though if there is damage to the bearing surfaces from the impact of hitting the piston. I would open it up, check it and put a steel caged big end bearing in.
don't know about the liners, if they install fine, measure round when installed and have the correct piston/liner clearence they should work, no reason not to.
do you how may hours on this piston ? and did it seize first then break or just break because it was old?
it would run open just like a lifan 125
id fix the RHS case between the gearbox and crank there is not much load on that bit it should not be a problem to fixthe other brocken bit on the case was just a baffel for the reed valve passage doesn't matter I think.. could be wrong
you can test the big end for wear by twisting the rod to look for movement and can wash out all the oil with a solvent then hold the crank in the air with one hand by the rod, hit the top of the rod downward with your other hand if it rings its got some play.
you can't see though if there is damage to the bearing surfaces from the impact of hitting the piston. I would open it up, check it and put a steel caged big end bearing in.
don't know about the liners, if they install fine, measure round when installed and have the correct piston/liner clearence they should work, no reason not to.
do you how may hours on this piston ? and did it seize first then break or just break because it was old?
Joined Nov 2001
17K Posts | 773+
Ely, England
break the crank and the rod can be twisted a little. up to the engineers. they will say yes or no. a little heat would be nice. you need that wall welding back up. you may have damage where the liner 'O' rings seal inside the cases.
what is the cause. you're still going to find more i'm afraid!
regards
Taffy
what is the cause. you're still going to find more i'm afraid!
regards
Taffy
Only thing I can come up with is that one of the two parts that holds the gudgeon pin broke off and was the reason for all this carnage, offcourse if that missing part is the cause or the result of the problem I'll never know.
Any theories as to what might've caused this are more than welcome, repairs are gonna be over a 1000 euros and don't wan't to have the same problem after 10km again because i've overlooked something.
Any theories as to what might've caused this are more than welcome, repairs are gonna be over a 1000 euros and don't wan't to have the same problem after 10km again because i've overlooked something.
Joined Nov 2001
17K Posts | 773+
Ely, England
if the gudgeon pin started to float out to the side it would have graunched the side wall a few times scoring it. I can't see anything here. If it was in front of me I bet i could.
By the way, I have just saved a bent and twisted rod. Someone is going to be very happy!
regards
Taffy
By the way, I have just saved a bent and twisted rod. Someone is going to be very happy!
regards
Taffy
Taffy said:
Some pics of the bottom side of the piston, I've checked the liner again and can't see any evidence that the gudgeon pin moved out the side, the liner looks ok, well at least the pieces I could find
I'm thinking that the part that holds the gudgeon pin broke off maybe due to a bad casting of the piston? But then again, what do I know anyway
Joined Nov 2001
17K Posts | 773+
Ely, England
no. what has happened is that a circlip has jumped off and the pin has drifted into the part that is BROKEN off. I suggest that moments before the incident the pin eventually left the right side and once it was supported on just one side - THAT's when it all happened.
you lost a piston circlip.
regards
Taffy
you lost a piston circlip.
regards
Taffy
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