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Disco 3 tdv6. Head gasket replacement (body on)
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3
Disco 3 tdv6. Head gasket replacement (body on)

So, after buying a 2005 Tdv6 with a suspect blown HG . The car has injector timing codes of p020a, p020b, p020c.(cylinder 1,2,3. Off side)
The expansion tank is pressurising as soon as the key is turned,indicating exhaust gasses......it did run yesterday, but very poorly (maybe on 3)..and after a lot of cranking......but today wouldn’t fire.

I don’t have a ramp so I’m going to have a crack at doing it myself body on, and on the driveway.....I’m not a mechanic but I’ve played with these things for a few years now, including replacing several oil pumps and cam belts....so I’m quietly confident.

please don’t tell me to get someone else to do it, or to take the body off....it’s not going to happen......I’d just like any tips and advise that you may have from experience, also a list of parts that I’ll need to complete the job.

I’ve got plenty of time to do this job, and it may take a while but I’ll keep the forum updated on progress and issues for anyone who’s interested.

many thanks
  
Post #21914724th Dec 2020 5:10 pm
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darrind
 


Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2863

England 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Good Luck with this as it is its possible to do the head swap on the drivers side head without too much hassle compared to the passenger side which is more complex

https://www.disco3.co.uk/forum/tdv6-head-removal-149234.html

https://www.disco3.co.uk/forum/topic100891.html

Im sure there will be lots along to say its easier doing body off but if thats not an option, its not an option.

Lets see pictures of it along the way! Hope youve got a cover over you to keep the winter off your back whilst doing it!

Good Luck! Thumbs Up Thumbs Up
 Must stop buying shiny toys....  
Post #21914814th Dec 2020 5:45 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

Thanks
I’ll be taking loads of photos, and may even video it.....no cover unfortunately.
  
Post #21914844th Dec 2020 5:50 pm
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motorworks
 


Member Since: 14 Nov 2019
Location: Usk
Posts: 401

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

As a first step I would try to find which cylinders are leaking. You may only need to remove one cylinder head.

I am not aware of an easy way to check for leakage. My approach would be to remove injectors, find TDC cylinder 1, then apply air pressure to each cylinder and watch for bubbles in the expansion tank.

If the oil leak (MOT history) is from o/s inlet manifold you can fix that at the same time.
 Chris  
Post #21915604th Dec 2020 8:49 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Yeah remove injectors

But get a kit off eBay where you apply pressure to the header tank cap.
Then look thru the injector holes for orange coolant appearing or stick a screw driver down

Or turn the engine manually and see which hole shoots water out like a fountain Rolling with laughter
  
Post #21915844th Dec 2020 10:39 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3





  
Post #21919366th Dec 2020 6:39 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

Spent half an hour stripping it today and found this broken sensor thingy....what is it please?
 

Last edited by Jonmoore1970 on 6th Dec 2020 7:05 pm. Edited 1 time in total 
Post #21919376th Dec 2020 6:40 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Broken leak off pipe.
Fuel temp. Sensor
  
Post #21919386th Dec 2020 6:41 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

Perfect, thanks mate.
  
Post #21919436th Dec 2020 7:05 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

Apologies for anyone who’s interested, I’ve been incredibly lazy.
Anyway, yesterday and today I’ve been tucking into the engine, I’ve run out of light today but just have the head bolts and manifold bolts to remove before the head can lift off.

A few things I’ve noticed along the way. (see pics)....
No wonder people say the body should come off, it’s totally doable but the easiest of bit to remove are painfully difficult with the body on. The water pipe across the back of the engine took me 45 minutes to remove, 2x 10mm bolts holding it on were a nightmare. (Probably easier with a right angle wrench, but i don’t have one).

one job I wasn’t looking forward to was the injectors , but they came out very easily, but were covered in oil. I’m guessing two things, either they’ve been done before and coated in oil when fitting, or the injector holes in the head have cracks (all 3 not likely?)

Looking at the cam belt can someone decode the numbers on it for me, the tensioner is 2015 and it has a new oil pump but the dodgy old style one, so I’ll be replacing the belt pump and all pulleys with new bolts.

looking at the cams the left one is very black at the rear, but pretty clean everywhere else. Any ideas why?

The head has handwritten writing on it indicating it’s a second hand part.....my intention is to stick another used head in it , that is known and tested. (Any advice here?)
My intention is to have the head off tomorrow and order the parts required, I’ll update then hopefully.

https://share.icloud.com/photos/0LtKTHL1fv...JxPpG1aAng
  
Post #219749130th Dec 2020 5:49 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Very oily injectors. I guess the 2nd hand cam cover gasket was used previously

If your struggling with the water pipe bolts, let’s hope you don’t need to remove the passenger head

Have you checked thru the injector holes if you can see orange coolant ?
Would be good to have the cambelt on so you can rotate engine to help look for coolant
  
Post #219751430th Dec 2020 6:46 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

Looks oily rather than coolant.




  
Post #219752430th Dec 2020 7:33 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

Looks oily rather than coolant.




  
Post #219752530th Dec 2020 7:33 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Need to look thru that tiny hole to see.
If you rotate the engine round to bring each piston to the top in turn it will allow you to see better. You need the cambelt on though
  
Post #219753030th Dec 2020 7:46 pm
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Jonmoore1970
 


Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125

2005 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

I’ll see once the head is off, surely?
  
Post #219754630th Dec 2020 8:30 pm
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