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Glitch
by BobtheTrain - 18/07/25 05:47 PM
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Forums34
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Aug 24th, 2023
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Joined: May 2011
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Has a lot to Say!
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OP
Has a lot to Say!
Joined: May 2011
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My Morgan handbook says that the 1595cc Sigma engine has chain driven camshafts. Michael Palmer's 4/4 book shows, and lists belt driven cams. My dealer told me the cams were chain driven.
Does anyone know the truth? If the cams are, as I suspect, belt driven what is the specified belt change frequency?
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Joined: Feb 2011
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Has a lot to Say!
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Has a lot to Say!
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don't panic Ford Zetecs are 10 years 100,000 miles.
Modern fords are now chain driven..
Peter.
Aero plus8 50th Anniversary.
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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I agree that they are usually 100,000 mile changes BUT ..the Ford Sigma (aka Zetec SE) has BELT driven cams. I think only the Duratec's (as in Plus 4) have chain drive but I might be wrong there..
Phil Egginton
1979 4/4 4 seater
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Member of the Inner Circle
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The latest Ford Sigma engines are belt driven. I wonder what the issue would be if replacement of the cam belt was overlooked as a result of the handbook stating the cams were chain driven and the belt failed?
Jays
Former Morgan owner. Gone but hopefully not forgotten!
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Joined: Dec 2008
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Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
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An expensive bill would be the outcome. As a customer you expect the Dealer to know. Most customers wouldn't recognise a cambelt if it hit them in the face.............
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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I suspect the reason the handbook says chain is because it is based upon the last 4/4 which had a 1600cc Duratec engine like the 2.0 in the Plus 4. 
Phil Egginton
1979 4/4 4 seater
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Sigma 1600 has glass fibre reinforced long life belt, 100,000 miles/10 yrs
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Joined: Sep 2010
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Talk Morgan Expert
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Talk Morgan Expert
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If these engines had chain driven cams wouldn't they sound like a 'proper' twin cam aka Lotus?
1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
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Joined: Feb 2011
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Member of the Inner Circle
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I thought the engine previous to the 1600 Sigma was the 1.8 Duratec so really Morgan should not have got the handbook wrong.
Jays
Former Morgan owner. Gone but hopefully not forgotten!
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Joined: Aug 2011
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Talk Morgan Guru
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Talk Morgan Guru
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From memory; 4/4s came with Zetec 1.8s (belt) upto about 2005 and then went to the 1.8 Duratec (chain).
My 4/4 is a Zetec and though Ford say belt change every 100,000 miles; I had mine done at 7 years old for peace of mind.
Bud
Bud
4/4 "Stanley"
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