Vehicle & Technical > Range Rover
3.9 V8 Auto overheating
Dr Strangeglove:
Took the thermostat out this weekend - need to stick it in water to test it yet mind. I need to get my friend to check the compression for me as I want to make sure it is the head that has gone. I also need to check between the rads as well.
When you take the head off do you have to replace the old bolts with new?
I am currently looking at a 200 TDI engine so I don't know just what to do (do I have the heads skimmed? Do I do both heads? etc.). It’s a case of how far do I go to get it going again!
By the way - Check this out!! Found it by accident when looking for another site I wanted to leave the address for!!
http://www.landrover.ee/est/files/manuals/engine/V8overhaulManual.pdf
This is the one I was looking for!
http://www.v8engines.com/engine-4.htm
Thanks for the help – I will keep you informed.
Range Rover Blues:
On the V8 you can re-use the bolts. As a rule of thumb any tightening sequence that involves angle-tightening indicates strethc bolts which are sacrificial ( on Transit they can be used 3 times and should be punched each time). The V8 does not use stretch bolts but I advise a thread lubricant and sealer to protect the aluminium.
gnasha:
i recently had a prob with header tank getting pessure did comp test on left bank and had low psi on a couple of cylinders so i have changed both head gaskets (First time for me :D ) just did it how it says in manual used a very straight edge and a torch to see if any warping had happend and was lucky both haeds as flat as can be put all back togeather slowly made sure twice or was it 3 times that all was in right place put key in and she fired stright up :D not had a problem since
by the way every one i spoke to said change both gaskets as u half way to doing both anyway
Dr Strangeglove:
Checked the compression on the head last night - Off side front to back 80,85,100,100 Near side front to back 110,125,125,125 (although on the 110 the battery was fading so this may have made a difference). I will take the heads off this weekend change the gaskets (may also get the heads skimmed).
When taking the plugs out I noticed oil had been leaking from them and they were sooty. What are the possible causes of this and what do I need to do to cure it.
Also - as the heads are off are their any other items that you recommend I look at/replace with it being stripped to this point. The vehicle won’t get a lot of use so I need to bear this in mind before I start spending a great deal on it!
All help appreciated
Regards
Mick
Rich_P:
I would check the top of the liners in each cylinder as well while the top end is off.
Sooty plugs can be an indication of the fuel being poorly burnt. Compression wouldn't be affected by the cranking speed either I believe, as it would still be generating the same compression except not turning over as quick.
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