Author [ES] [CA] [PL] [PT] [IT] [DE] [FR] [NL] [DK] [NO] [GR] [TR] Topic: Workshop can't fix my engine noise, dealer won't take it in (Tiger 800 XC -14)  (Read 752 times)

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Offline stahlmannen

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Hi all!

Last year i put my bike down on tarmac at around 50 kph due to oil on road. No biggie, but after that the engine started sounding bad and now the workshop say they can't fix it, even after being in contact with Triumph. Apparently, the noise is better but not gone. It's like a hammering/ticking sound, video here:

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I did a spectral analysis and it seems to be one tick for every engine revolution. I'm not sure it's that bad, but the dealer won't sell it for me with this noise.

Job done by workshop so far:

- Three valve cotters were broken and valves bent. Complete top "renovated".
- Soot in cylinders cleaned
- Engine synced
- Cam tensioner replaced
- Balance shaft and bearings replaced
- Bearings frame, crankshaft, rods checked.

Can you help me figure this out? The bike (Tiger 800 XC) is from 2014 and has only done 15000 km, serviced every year. It's All input welcome, thanks in advance!

Offline Djairouks

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I'm by no means a specialist but my first thought is, this sounds like the oil pump is not doing it's full work,
did the dealer check that somewhere the oil circuit isn't obstructed, as you mentionned broken parts, could
be some fragments causing this maybe.

Online Georgeinabz

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Online awjdthumper

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Can you explain what damage was done to the engine when the bike went down - I'm a little confused as to how the fall resulted in bent valves?
Suzuki GSX1400, Armstrong MT560 + collection of classic British bikes

Offline Shergar

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*Originally Posted by awjdthumper [+]
Can you explain what damage was done to the engine when the bike went down - I'm a little confused as to how the fall resulted in bent valves?
It's possible that the engine over revved with little load - from one of my early jobs of testing engines on dynamometers I do know that a sudden loss of load and high revs can kill an engine and bend valves - thats after it tried to kill me when the  bolts holding the cardan shaft between the engine and dyno decided to shear and sent themselves through a very small gap in the protective cover and into the wall !
A quick blip won't do much but if it somehow revved to the limiter for more than a few seconds it could cause damage.

Online Paulhere

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Is it possible the crank could have twisted. The boy on the other thread appeared to check everything else.
Current bikes Tiger800 XRx, Tiger Sport 1050, Ariel FH 650, Yam Serow 225.

Online awjdthumper

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*Originally Posted by Shergar [+]
It's possible that the engine over revved with little load
In terms of trying to work out what is still wrong with the engine, I think it is always a good idea to try to work out exactly what happened when the bike was dropped. Normally, valves bend when they come into contact with a piston and I assume in this case there was some damage to one or more piston crowns underneath the 3 bent valves? I'm not sure what is meant by a broken cotter/collet and it would be interesting to know whether a spring parted company with the end of a valve as a result of a broken cotter?

The noise sounds as though it is coming from the cam chain and/or cam shaft. Was the cam chain carefully inspected for possible damage and what was actually replaced in terms of the cam tensioner?  Was this the hydraulic tensioner itself or was it the tensioner blades?

I would be interested to know how you did the spectral analysis - in principle, it should be ticking at half the crankshaft speed if it is coming from the cam chain or tensioner?

The engine certainly rattles but I would be tempted to carry on using it and to see whether it gets worse when it might become more obvious what is causing the noise.

Suzuki GSX1400, Armstrong MT560 + collection of classic British bikes

Offline AvgBear

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*Originally Posted by stahlmannen [+]
Can you help me figure this out?
It's All input welcome, thanks in advance!
*Originally Posted by awjdthumper [+]
The noise sounds as though it is coming from the cam chain...
The engine certainly rattles...
:0461:
When I listened to the clip I thought: "Cam chain tensioner."
Historically, failed OHC cam-chain tensioning devices can set up all kinds of racket -- make sounds like an empty tin full of rattling nuts & bolts.
Those who haven't experienced it will often surmise that the engine is completely shot!
Even shops (sometimes): I once helped a friend buy a used Kawi that a dealer had parked out-front with an extremely low price. When inquiring he was told the engine was "blown-up". I told him that I doubted it -- that particular engine-type was known to be quite robust. Upon inspection, the cam-chain tensioner plunger was hung-up in its travel -- after repair the engine was fine.
May not be the case in this instance? But, does happen...
There are a terrible lot of lies going about the world, and the worst of it is that half of them are true.
WSC

 


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