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T3 Sport / Touring Forum For the discerning Hinckley Sporting Enthusiasts. Open to all lovers of the original T3 Sport Models including the Trident, Sprint, Sprint Exec, Daytona, Trophy, and Speed Triple.

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Old 03-21-2010, 03:06 PM   #1 (permalink)
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Catastrophic Engine failure at speed

Here is the much awaited pictures of the egine which exploded under my legs at speed on the M11 motorway.

I'll leave you all to ponder on this one but what you are about to see is not a pretty sight.

The big-end bearing went which then snapped the con-rod as so much movement up and down and side to side.
This then shot the entire crankshaft into a fizzy fit which put side movement on it as well as up and down smashing the outer crank-casing covers from the inside out.

The top half of the piston then came up hard against the valves and bent two valves.
The force was so great with the piston coming up it also caused the valves to push the entire camshafts and even burst a cap bolt clean off.

The entire engine and cyclinder head as you will see is wrecked.

I can see also why the gearbox locked-up, so much shrapnel and shards of metal and alloy it went into the gear-box and clutch.
I also lost the clutch on trying to free-wheel when the back locked up and the clutch pipe was severed behind the starter motor by flying shrapnel so no pressure to push the selector rod.

lets say I'm lucky to have walked away from this without as much as a scratch.
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Catastrophic Engine failure at speed-dscf1879.jpg   Catastrophic Engine failure at speed-dscf1887.jpg   Catastrophic Engine failure at speed-dscf1892.jpg   Catastrophic Engine failure at speed-dscf1891.jpg   Catastrophic Engine failure at speed-dscf1895.jpg  

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Old 03-21-2010, 03:11 PM   #2 (permalink)
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second lot of images from my smashed engine.
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Catastrophic Engine failure at speed-dscf1897.jpg   Catastrophic Engine failure at speed-dscf1899.jpg   Catastrophic Engine failure at speed-dscf1900.jpg   Catastrophic Engine failure at speed-dscf1999.jpg   Catastrophic Engine failure at speed-dscf1903.jpg  

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Old 03-21-2010, 03:12 PM   #3 (permalink)
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Bloody hell!!!! Don't suppose Triumph would fix it under warranty? (Joke!) Can you tell if the oil pump failed?
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Old 03-21-2010, 03:20 PM   #4 (permalink)
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FFS mate that's the sort of grenade that drag bikes suffer....what you been doing to it ?? (only joshing), quick engine flush and a set of gaskets she'll be as good as new :-/ !!!

Glad you got off that one to tell the tale ;-)

Oh cheque is in the post been flat out so a bit slow in the offing.

Cheers
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Old 03-21-2010, 04:25 PM   #5 (permalink)
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Jeez! That is some failure......... It is amazing how much damage has been done inside (and outside). Now the reason for the big-end failing.................?

Thanks for sharing.
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Old 03-21-2010, 04:43 PM   #6 (permalink)
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that middle rod has got very hot was there no warning noise wise ??
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Old 03-21-2010, 04:44 PM   #7 (permalink)
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What, I thought they were drag bikes, thats what went wrong, pull the throttle back and only change gear when she cuts out, Ah wait, no rev limiter, so get ready to change gear when engine explodes, ah too slow, engine HAS EXPLODED

They just don't make engines like they used to
Laughing and joking about it now as definitely something to remember for some time to come.

Thanks motT3 no problem, will take me a few weeks to get it all in and sort out another ride.

I will look more soon until I find out exactly what happened but normally in this kind of failure, oil has failed to lubricate the bearing surface turning at the bloody speed of light, so heat is immense, burning the bearing surface away and actually burning the bearing into oblivion and allowing bare hardened metal to metal turning.

The big-end cap as you can see is burnt to high heavens which in turn let the con-rod wobble side to side and up and down. Bang, as you can see, goes the con-rod and what-ever she can wack into on her way round just to really hit home that your engine is not going to survive what it's about to have done to it.
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Old 03-21-2010, 04:45 PM   #8 (permalink)
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Oop's that does look bad , i'm scared to go out on mine now , think i'll swap it for something a bit more reliable like an old meriden bonnie ...
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Old 03-21-2010, 05:05 PM   #9 (permalink)
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Smile

Are you going to get another engine ? There's some on Ebay now.
The bike is worth it..... Then sell all the good parts from the old one. :-)
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Old 03-21-2010, 05:44 PM   #10 (permalink)
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Quote:
Originally Posted by buckoz View Post
that middle rod has got very hot was there no warning noise wise ??
I've had engines over the years in racing cars and on the road give warnings something major is about to happen and had one that had gone on the small-enf bearing smashing the piston through the side of the block and making a hole in the bonnet the size of a rocket propelled grenade, a 6 cyclinder inline side in a race prepared BMW 323i.
I used to race formula ford 1600's in Scotland for an Irish team some years ago and you always got warning something major was about to happen.
A wobble, sudden vibration, thumping, knocking, rattling, even a warning light on oil or something.
Banger racing & rally driving in forests, although I would not have the engine go but wrap the car around a tree or fly of the corner and bye-bye rally car. These are expected and you are kitted up and geared up for these sort of events.

I'm not as confident on two wheels but over the years have done trials and tried a bit of moto-cross.
I can still also jump off rock-faces with my mountain bike I'll post an image or two of this one, see who else is as mad.

But on this instance, i'm riding outside lane M11 and suddenly bang, clatter, EEK, rear wheel locked up, bits of shrapnel flying out from between my legs and smoke. But all that was on my mind in that split second was to get out of the outside lane or I was wiped out.
I saw the cloud of smoke in my left side as I was skidding between the cars to get to the inside lane. I was lucky as somehow I had a path (almost) through both lanes as I had no real other control on my steering as the back wheel was on lock-down. I wonder if the tyre carcus could have slipped on the rim while all this was happening, causing the engine through the gears to be turned even more?
I never had time to think or listen as this all happened so fast I honestly can't remember what noises there were after it happened.
I rememebr hearing squealing tyres from brakes of cars as it woke up a few drivers on the spot.

All I was caring about was trying to skid my way onto the hard shoulder. I also remember I was ready to jump off once I hit the hard shoulder and let the bike go, i'd only have cut up my riding gear a bit and would have been fine. I always wear full body protection.

But for the grace of god somehow, don't ask me how, I brought her to a stop on the banking, slid her back down, she came down at quite a speed. I put the side stand down, turned off the ignition, got off and turned around to see the carnage and mayhem my bike had just caused.

Not a single car had touched each other and there was some amount of cars pulling up to offer help with a couple running out who pulled up sharpish to see if I was alright.
I didn't care at that moment about me, I was gutted at what had just happened to my engine. I'd spent over a year rebuilding this baby and engine wise she was beautiful, throaty, and a lovely deep down pulling power and grunt.
This all happened from beginning to end in about 4 seconds flat, from explosion to stop.

I remember my arse working hard on the seat as was my body and every muscle on me taught to the limit and adrenilin pumped through me at the speed of light

The car bumper I knew I was going to hit on the way over the lane but at that speed in survival mode you wouldn't feel it until the end of it all.
Luckily it was a scrape and nothing to write home about. Not even an ouch, that hurt.

Then the stupid driver decided to have a go at me for touching his car bumper and causing him to swerve and I remember doing something to him I shouldn't have done but it just happened. All I wanted him to do was shut up and let me calm down after what had just happened.

What a long winded answer, happy reading, hope you had a cuppa ready to drink
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