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Timing chain witness marks ?
http://forum.triumphdolomite.co.uk/viewtopic.php?t=34668		 Page 1 of 1
Author:  MIG Wielder [ Sun Jan 20, 2019 5:07 pm ]
Post subject:  Timing chain witness marks ?
I've been helping a colleague with an early Sprint cylinder head job and I've just noticed what look like timing chain witness marks on the inside of the timing chain case that runs through the front of the cylinder head.
Is this normal ?
I do remember that when we bolted the camshaft sprocket to the support bracket the chain wasn't really as tight as I remember mine as it ran round the sprocket.
Thanks ,
Tony.

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timing chain marks2.jpg
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Author:  cleverusername [ Sun Jan 20, 2019 11:26 pm ]
Post subject:  Re: Timing chain witness marks ?
Quote:
I've been helping a colleague with an early Sprint cylinder head job and I've just noticed what look like timing chain witness marks on the inside of the timing chain case that runs through the front of the cylinder head.
Is this normal ?
I do remember that when we bolted the camshaft sprocket to the support bracket the chain wasn't really as tight as I remember mine as it ran round the sprocket.
Thanks ,
Tony.
No, at least my head does have anything similar and I can't imagine you'd design it this way. My original timing cover had a similar problem, with marks were the chain cut through. Tensioner failure, stretched chain, basically the chain making a bid for freedom.
Author:  tony g [ Mon Jan 21, 2019 6:42 am ]
Post subject:  Re: Timing chain witness marks ?
Certainly caused by the chain, whether its the current one or a previous one is unknown I suppose.

Tony
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