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Author Topic: Fulvia Timing Chain  (Read 4560 times)
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Charles Frodsham
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« on: 02 October, 2017, 08:41:17 PM »

Does anyone on the forum, or does Lancia, have any guidance or information on how to assess whether the timing chain tensioner does it job correctly, and when it needs replacing?
Thanks
Charles
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roddy
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« Reply #1 on: 04 October, 2017, 07:08:52 PM »

Hello Charles

Part of the timing chain tensioner mechanism, is a curved metal 'shoe' which has its face covered by bonded-on rubber, on which the chain slides.  (The shoe is different between 1300 and 1600 engines).  A new shoe has perfectly flat rubber but after usage, the chain gradually wears away the rubber surface to show grooves corresponding to the pattern of the chain.  As wear increases, particularly at the leading edge of the shoe, the rubber can get thin and start to break away from its metal backing, and eventually the chain will start to wear away the metal part of the shoe in the same pattern.  By this stage the shoe is well past its use-by date and no doubt the chain is suffering too.  Visual inspection should be possible after removing the water pump, which exposes part of the timing chain chest.

Hopefully this answers part of your question, but possibly not it all?

Regards - Roddy   
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Roddy Young
Dunfermline, Fife

1970 Fulvia Sport S1 1.3S
nistri
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« Reply #2 on: 05 October, 2017, 11:29:39 AM »

In my own experience the chain stretches a lot before there is large wear of the tensioner shoe. One easy test for chain wear is to see if the static ignition timing is the same for cylinder #1 and 4, Andrea
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Andrea Nistri

Ardea S2
Appia S2
Fulvia GTE
Fulvia Sport 1.3 S
Fulvia Montecarlo
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chriswgawne
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« Reply #3 on: 05 October, 2017, 12:58:02 PM »

On a 1600 a worn stretched timing chain can jump resulting in valves and pistons making each other's acquaintance.
Chris
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Chris Gawne
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lancialulu
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« Reply #4 on: 05 October, 2017, 01:20:05 PM »

In my own experience the chain stretches a lot before there is large wear of the tensioner shoe. One easy test for chain wear is to see if the static ignition timing is the same for cylinder #1 and 4, Andrea
That's a neat piece of information. I will look at my 1600s in next few weeks in this regard.
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Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21.  12v
Jaydub
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« Reply #5 on: 06 October, 2017, 09:55:16 AM »

To check timing chain wear on a twin cam, press down on the chain between the cams, and if there is any slack it will show. If it remains taught, all should be fine.
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1600 HF. S2.
Charles Frodsham
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« Reply #6 on: 06 October, 2017, 01:50:53 PM »

Thanks for all the replies.....very much appreciated.

The chain is nice and tight between the cams, so that's a good start. Hopefully will find time tomorrow, whilst it raining, to investigate a little further.
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