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Timing chain tensioner broken! 

 

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 Post subject: Timing chain tensioner broken!
Posted: Sat Oct 29, 2005 1:31 pm 
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I recently had tm engine rebuilt [6 months, 4000km ago] and last week while driving home from work something started to rattle in the engine a couple hundred metres from home, however it was still running fine. So the next day i took the rocker cover off and there is a piece of metal laying next to the top sprocket of the timming chain!

Ive now taken it back to where i had the engine built and they have replaced the tensioner, timing chain and other associated pieces, but something is not right and now it is VERY noisy, and they are continuing to work on the car until they completely rectify the problem.

They tell me that they have heard of the tensioner bracking before, but it has never happened to one of "their" engines.

Has this happened to any one else before??? And does anyone know what might have caused it???

 

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Posted: Sat Oct 29, 2005 2:37 pm 
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most people are lucky if they don't break,,,so your not the only one...

 

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Posted: Sat Oct 29, 2005 4:30 pm 
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The tensioner may not have the spring released, the only other thing is if one of the chain guides is damaged/broken

 

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Posted: Sat Oct 29, 2005 4:44 pm 
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if they replaced timing chain they would have replaced the guides as well i assume, something similar has happened to my engine im not gonna investigate to far because i think its going to be easier to put a new engine in. im sure if they have had the timing case off they should have benn able to see any obvious problems seems a little strange to me
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Posted: Sat Oct 29, 2005 4:52 pm 
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thats the first time i've heard of the actual tensioner breaking.
the guides are a common problem (mainly the top one that isnt OVERLY important)
but the tensioner is usually fine.

 

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Posted: Sat Oct 29, 2005 5:42 pm 
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hers some pics

 

 

Attachments:
timing chain11.JPG
timing chain11.JPG [ 133.8 KiB | Viewed 96 times ]
timing chain10.jpg
timing chain10.jpg [ 90.25 KiB | Viewed 59 times ]

 

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Posted: Sat Oct 29, 2005 5:48 pm 
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ah thats the guide, not the tensioner :)

 

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Posted: Sat Oct 29, 2005 5:56 pm 
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oh. Just checked my repair manual, "tensioner damper". my mistake, thats what i meant in the first place.

 

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Posted: Sat Oct 29, 2005 6:11 pm 
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its fairly common for the one on the other side to snap, but the one thats broken on urs i the less common to go.

 

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Posted: Sun Oct 30, 2005 12:03 am 
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Looks like the lower one to me 12 hour job.
Done it 3 times

 

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Posted: Sun Oct 30, 2005 2:01 am 
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ahhhhh thats an absolute b**ch of a job! mine took a while.. most of the time is just pulling out half ur engine bay to get to the bloody thing to take off the timing cover! :evil:

 

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Posted: Sun Oct 30, 2005 10:34 am 
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that aint gunna be easy..

 

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Posted: Sun Oct 30, 2005 11:22 am 
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it is actually the one on the passenger side of the car that the tensioner backes up to. It snapped in 2.

 

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Posted: Sun Oct 30, 2005 12:49 pm 
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The tensoiner is on the drivers side

If its the top half of the passenger side guide you can get by without it.

 

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Posted: Sun Oct 30, 2005 7:32 pm 
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I am just puting my input in. I had my engine re-built 9 months ago and its done the exact same thing last week, mabey a faulty tensioner? or if it was ran with the tensioner not adjusted. thats about all I could come up with for mine. Mine was done by a mechanic also so I can only guess. Cheers
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