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+--- Thread: Head skim? (/showthread.php?tid=14284)
Head skim? - martyn92 - 30-05-2013
Been cleaning up the head and found this on cylinder 4,theres a ring about half the way round the cylinder, its smooth in places and rough in others.
![[Image: 20130530_222522_zpsb5ae425b.jpg]](http://s799.photobucket.com/user/martyn992/media/20130530_222522_zpsb5ae425b.jpg.html)
Im guessing it will need skimming?
RE: Head skim? - Dave - 30-05-2013
How have you been cleaning it up, flat surface or sand paper?
RE: Head skim? - martyn92 - 30-05-2013
Got all of the old gasket and thick rust off with a blade, then went over it with a flat (had it machined flat) piece of metal with 800 wet and dry lightly. The old headgasket has done that im sure of it
RE: Head skim? - Ruan - 31-05-2013
Yeah thats the ring that seals the combustion chamber... I'll guess that it had one of those wank fibre gaskets with rings on it rather tHan a proper steel gasket...
I'd get that skimmed as thats exactly the place it needs to seal the best...
RE: Head skim? - martyn92 - 31-05-2013
I think its the original gasket from 94. Do I need to remove the valves before getting it skimmed?
Also, I haven't cleaned the block up yet but is it likely to be the same ?
Head skim? - Frosty - 31-05-2013
The valves don't need to be removed for skimming.
RE: Head skim? - martyn92 - 31-05-2013
Decided to get it skimmed, rather be safe than sorry!
Is it normal after changing to hdi rods that the crank is harder to turn than before?
RE: Head skim? - darrenjlobb - 06-06-2013
(31-05-2013, 07:17 PM)martyn92 Wrote: Decided to get it skimmed, rather be safe than sorry!
Is it normal after changing to hdi rods that the crank is harder to turn than before?
Nothing should be harder to turn....do you mean harder compression? Or just harder right thro the cycle?
Correct choice to skim that, just asking for trouble if not!
RE: Head skim? - martyn92 - 06-06-2013
I reinserted piston 1 and it was much easier to turn after that
plus I had only just nipped up the end caps but after I had tightend the end caps fully that made a big differnce too ! However I now have this problem ... http://306oc.co.uk/forum/thread-14421.html
