Member Since: 08 May 2018
Location: Lytham
Posts: 32
Discovery 3.0 TDV6 head gasket replacement
Good day fellow contributors. I have a 2009 Discovery 4 3.0 TDV6, and need to replace the head gaskets. Has anybody attempted this with the engine in situ. Lifting the body off is not an option for me. Is there any links to other people’s experience, I would be very grateful for any help.
9th May 2018 10:47 am
Erea
Member Since: 19 Mar 2012
Location: Munster
Posts: 1509
I can’t help but I presume it’s only one head gasket would need replacement, for both sides to be gone at the same time would be unusual. Is it the nearside or offside that’s in trouble? That might make a difference for access.
9th May 2018 11:14 am
tungi
Member Since: 08 May 2018
Location: Lytham
Posts: 32
I will do both sides. The car was allowed to drive for too long whilst overheated. I feel happier doing both sides.
9th May 2018 2:24 pm
Neil990
Member Since: 14 Apr 2018
Location: Dorset
Posts: 12
It would be a struggle to do it with body on. I wouldn't like to try it.
9th May 2018 9:23 pm
woody32 Site Sponsor
Member Since: 11 Mar 2009
Location: Somerset
Posts: 3551
It’s a struggle but doable but a 1000 times easier with the body off and I’d park it in a shed until I could get the body off from experience,what’s your issue I’d be very surprised if there damaged/blown as there metal shims basically unlike conventional head gaskets,if it’s been cooked then possibly expect warped heads and without checking I think skimming is not advisable.
If you don’t have issues and you just want to change them because it got hot I personally wouldn’t bother can you elaborate on what happened as we maybe able to point you in the right direction Wanted D4s non runners pm for competitive price.
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9th May 2018 10:40 pm
tungi
Member Since: 08 May 2018
Location: Lytham
Posts: 32
The car turns over at a normal speed but sounds as if there is no compression and it also builds pressure in the header tank which would also make me suspect that its the head gasket.
I’m starting to believe I will need to lift the body off. I am contemplating using 4 hi-lift jacks and 4 mates to lift the body, remove engine and lower body back whilst engine is being overhauled.
By the way the car has done 147k miles
10th May 2018 10:51 am
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
I think you would be better spending your money on another lump rather than dig your self a potential money pit with one thing after another going wrong.
As for lifting body on hi lift jacks it may work but stability will be a major issue!
10th May 2018 1:12 pm
Russell
Member Since: 24 Aug 2007
Location: Kent
Posts: 10564
Someone on here did it with wooden blocks and trolley jackMY17 D5 1st Edition Namib Orange
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10th May 2018 1:37 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
A trolley jack is sort of stable, hi lifts are certainly not and 4 together will certainly be fun.
10th May 2018 2:10 pm
Erea
Member Since: 19 Mar 2012
Location: Munster
Posts: 1509
Hi lift jacks are about as unstable as you could get. We raised the roof of a shed 40’X15’ using one small bottle jack and timber blocks. Another option could be to raise the entire discovery on maybe 4 high lift trolley jacks prop the body solidly in position and disconnect and drop the chassis, it probably only needs less than 2’ to get clear of each other.
10th May 2018 2:29 pm
tungi
Member Since: 08 May 2018
Location: Lytham
Posts: 32
I agree the more I think about it the hi-lift jacks is a non starter. I am going to persevere because I like the discovery and I also like diy and I’m bugged if I’m going to let this beat me. I don’t have or plan to have a car lift, so I best get thinking. Any ideas or suggestions would be welcome, nothing is stupid (remember my hi-lift idea😂😂😂).
10th May 2018 7:30 pm
woody32 Site Sponsor
Member Since: 11 Mar 2009
Location: Somerset
Posts: 3551
The first body I took off I used two small fork lifts under the sills but not everyone has access to forklifts Wanted D4s non runners pm for competitive price.
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but not everyone has access to forklifts 
