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Sacrificial rocker arm ?
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euangibson
 


Member Since: 24 Dec 2010
Location: Borders
Posts: 11027

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Firenze RedDiscovery 4
Sacrificial rocker arm ?

Helped my mate yesterday strip his Alfa engine (1.9JTD)..... Well,I held the bits and made tea Embarassed
His belt had snapped and the engine stopped immediately.
He explained the Alfa engine has "sacrificial" rocker arms,so in the event of belt failure,the damage is very limited ......
On stripping down and taking the head off,sure enough,they had done their job with 8 snapped or fractured....
I don't venture under the bonnet,as most of what goes on under there is witchcraft to me,but it got me thinking about the obvious question...why doesn't the Discovery engine have a similar system to prevent catastrophic engine failure in the event of a belt snapping ?
 "Better to remain silent and be thought a fool,than to speak out and remove all doubt" ?.....what rubbish...

Locking rear E-diff
RLD spare wheel protector & sump guard
Extended roof rails
Series 111 mudflaps
Black side tubes,grill and vents
Timed climate remote
Hids4u interior lights

D4 Firenze my2012 HSE
D3 Java 2005 SE manual (sold,sadly,thanks for the memories)
1966 '88 Series 2a....still starts in the morning better than I do... 
 
Post #115587811th Sep 2013 8:13 am
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WillyEckerslike
 


Member Since: 22 Aug 2013
Location: Out in the world
Posts: 967

2007 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

Why? Because it's far more lucrative to sell a whole engine instead of a handful of rockers? Or is that me being cynical? Laughing

Or is it the difference between Italian and French engineering? The Italians know whatever they make will break, so might as well prepare for it. The French think their engineering is perfect, so why even think of the negative?
  
Post #115588711th Sep 2013 8:24 am
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