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Discomadness
 


Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2239

Wales 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Very interesting reading. Just to satisfy a curiosity. Couldn’t the engine be modified to accept tabbed bearings or isn’t there some form of adhesive eg loctite bearing fit be used ?
 Jarrod

Current : D3 2007 HSE - AKA the lemon
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Post #201758811th Jan 2019 5:39 pm
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Pelyma
  


Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496

England 

I’m an engineering ignoramus, why does this not happen in petrol engines?
 DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
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Post #201760411th Jan 2019 6:29 pm
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OvalAutos
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Member Since: 28 Dec 2018
Location: Cradley Heath
Posts: 246

United Kingdom 

Discomadness wrote:
Very interesting reading. Just to satisfy a curiosity. Couldn’t the engine be modified to accept tabbed bearings or isn’t there some form of adhesive eg loctite bearing fit be used ?


Later Gen1 engines onward have tabbed bearings, but all they do is locate the bearing in the journal. No tab will stop a bearing from moving.

I looked at bearing loc, but the problem is it pushes the bearings inwards, thus reduce the size. This just locks the crank.

..
 .
Joe

Those in the know, know. Those that don't know, just need to ask.
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Post #201765811th Jan 2019 8:35 pm
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defector
 


Member Since: 23 Feb 2009
Location: Greater Manchester
Posts: 1105

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

Discomadness wrote:
Very interesting reading. Just to satisfy a curiosity. Couldn’t the engine be modified to accept tabbed bearings or isn’t there some form of adhesive eg loctite bearing fit be used ?


Yes i modified my engine to accept tabbed bearings, it is a very simple procedure and you require a dremel or similar to make a cut/tab for the bearing.
  
Post #201774012th Jan 2019 1:36 am
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RATA1
 


Member Since: 27 Feb 2020
Location: Somerset
Posts: 316

United Kingdom 2014 Discovery 4 3.0 SDV6 XXV LE Auto Causeway GreyDiscovery 4

OvalAutos wrote:

There is nothing I have found that can prevent shells from moving other than to go down the race engine route and screw them in place. Neutral

Can screwing them down not be a fix then? What would this add to the bill?
I don't know much about engines (other than what I learned from rebuilding a Ural!) and thought along similar lines as to if they spin, can't the oilway be drilled bigger and a cylindrical tube shoved in to stop it moving and still allow for oil to pass.
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Post #21658695th Aug 2020 3:56 pm
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OvalAutos
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Member Since: 28 Dec 2018
Location: Cradley Heath
Posts: 246

United Kingdom 

I have seen 'screwed down' or 'pinned' bearings, but the engineering cost to do this is way too high and frankly not worth it.

A far better solution would be to have a bearing pair with one of the shells have a bigger OD. Then you could machine the cap to accept the larger shell. This would give you a step to prevent spin.
 .
Joe

Those in the know, know. Those that don't know, just need to ask.
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Post #217057429th Aug 2020 9:56 am
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