Vehicle & Technical > Range Rover
Missing a beat
Range Rover Blues:
I know what you mean about knocking the bottom end out but as posted above be someone else, it's the top end of the V8 that suffers and whilst the big ends could be going through the lining I'd not touch it unless you have to, disturb the big ends and the rings might catch the wear lip and shatter. Bores would be nice to still see the honing but if not scratched then unless you are stripping it down just ignore it.
Back to the witness mark, on the front of the driver's side head there is a small square block facing forewards with a hole in it, it's less than an inch square and roughly in the middle of the front face, almost insignificant.
HGowever if you know how thick the heads should be I think you'll be interested to see which areas of the heads have had the most skimmed, as the heads tend to bend and go concave some combustion chambers get skimmed more than others :shock:
Garth:
Measured heads before went for skimming and niether had been skimmed which was a big surprise as surfaces looked totally different.
Both measured 23.9 at thin side and 63.5 at thick side which is correct for original as new heads non suffix B engine. Definately no witness mark.
As there is only machined faces on 4 corners I cannot measure accross heads.
The engine has been changed at some point going off engine number I thought for an older engine. But looking at manufacturing date marks the heads were manufactured November/December 1993.
Checked pistons and bores they look fine.
Range Rover Blues:
All sound ok then. Check for flatness with a steel rule and feeler guages, you may find the heads are now concave. Skimming will also get rid of any pitting in the surface around the water jackets. Is the top face of the block ok too?
Garth:
The one with the NG gasket has slight damage going from the edge of the liner towards (but not to) the waterway tried to sand out with flat block but too deep but you can only just feel it with finger nail. Currently looking on net to see if there is anything that will fill it before I put head back on. Not unduelly concerned about it though.
Range Rover Blues:
Leave it, fit composite gaskets, don't worry.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version