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Rebuilding a Disco 4 2012
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ss9940
 


Member Since: 25 Dec 2017
Location: Maribor
Posts: 11

Slovenia 2012 Discovery 4 3.0 SDV6 HSE Auto Bali BlueDiscovery 4
Rebuilding a Disco 4 2012

Hi all!

As a new user on the forum, i have a newbie question. 2 weeks ago I bought a 2012 Discovery 4 with 99000 km on the clock with a seized engine. After a strip-down, the bearings on the crankshaft have failed. As a result, 3 conrods have snapped and made 2 holes in the engine block. Basically, the engine is scrap. I decided to get a replacement engine - a 2012 one with low mileage. My question is: should I change the main & conrod bearings (king brand) before mounting the engine as a precaution? What about the oil pump?







Thank you

Alex S.
  
Post #190175215th Jan 2018 9:59 am
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dgardel
 


Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025

Italy 2014 Discovery 4 3.0 SDV6 XXV LE Auto Santorini BlackDiscovery 4

Do you know the cause? Low on oil? Oil pump fail?.....



This document will be a great help for your rebuild project:

https://1drv.ms/b/s!AnHBx4Wc2MJLgdhptdHH0AmetYcYPg
 Discovery 5 tdv6 HSE Corris Gray Outback Engineering Limited Edition

IID Pro MV License

 
 
Post #190182015th Jan 2018 3:28 pm
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ss9940
 


Member Since: 25 Dec 2017
Location: Maribor
Posts: 11

Slovenia 2012 Discovery 4 3.0 SDV6 HSE Auto Bali BlueDiscovery 4

Hello!

The cause is definetely oil starvation (look at pic #1 - the color of the crankshaft); I think the main bearing rotation has caused oil starvation to the con rod bearings causing them to overlap destroying the engine.

Buying the replacement engine is definetly a risk that's why I was thinking about changing all the bearings & oil pump in advance.

Thank you for the book provided, it will be of great help!

Alex S.
  
Post #190182315th Jan 2018 3:42 pm
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geoffsnook
 


Member Since: 13 Jun 2014
Location: south wales
Posts: 3169

Wales 

I would change them as the engine is out just for piece of mind but the problem could reappear Thumbs Up
 Discovery 3 se gone
Range rover sport supercharged here:) 
 
Post #190182415th Jan 2018 3:47 pm
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ss9940
 


Member Since: 25 Dec 2017
Location: Maribor
Posts: 11

Slovenia 2012 Discovery 4 3.0 SDV6 HSE Auto Bali BlueDiscovery 4

Hi!

That's exactly what I thought... There is no guarantee that the problem won't reappear but at least it won't appear soon cause of worn main bearings or failed oil pump...

Any other suggestions? Glueing the Censored main bearings to stay in place?

Alex
  
Post #190182515th Jan 2018 3:58 pm
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MikeBob
 


Member Since: 19 Sep 2016
Location: Pretoria
Posts: 105

South Africa 2010 Discovery 4 3.0 TDV6 SE Auto Ipanema SandDiscovery 4

i suggest you dont replace the bearings, but do replace the oil pump. the post 2012 motors supposedly have bearings with tabs so in theory no more turned bearings
  
Post #190183315th Jan 2018 4:20 pm
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ss9940
 


Member Since: 25 Dec 2017
Location: Maribor
Posts: 11

Slovenia 2012 Discovery 4 3.0 SDV6 HSE Auto Bali BlueDiscovery 4

Hello!

Can someone confirm this? The car is 03/2012, that means that the destroyed engine is probably 2011. The bought engine is from 2012. Maybe disassemble and look before installation?

Thanx

Alex S.
  
Post #190184615th Jan 2018 5:13 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8043

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Can't you drop the sump and check them before your fit the engine?
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #190186715th Jan 2018 6:21 pm
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ss9940
 


Member Since: 25 Dec 2017
Location: Maribor
Posts: 11

Slovenia 2012 Discovery 4 3.0 SDV6 HSE Auto Bali BlueDiscovery 4

Sure, I'll do that... Do all the bearings have tabs (main/conrod)?

Alex
  
Post #190187015th Jan 2018 6:23 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 773

Sweden 2011 Discovery 4 3.0 TDV6 HSE Auto Marmaris TealDiscovery 4

Having a Disco4 3.0l MY2011 and got a MY2015 engine for replacement.
Is it a straight swop or should some of the parts from the MY2011 be put on the later engine. Like injectors, turbo or more?
Any other issues to be anle to make the swop?
  
Post #190198115th Jan 2018 10:35 pm
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