engine rebuild - head

1. wicked-vtr Saxperience Forum Bum Joined: Jan 2009 Surrey Posts: 2608 200sx s14a mark 1 vts

   #1 1st October 2010, 14:07

   So im getting on with my engine rebuild project (pics/progress thread to follow if anyones interested)
   Got the head off to find its got a snapped valve, obviously this will be replaced. Im just wondering what else i should be renewing/uprating on the head whilst i have it off, so far ive got:
   
   Damaged valve, camshaft oil seals, cam ladder seal, cam followers, valve stem seals. Is there anything ive missed? or would you say im going a bit far?
   
   Also, is it only worth uprating valve springs/solid lifters for a high revving engine? Worth having some headwork done as its off?
   
   
   Sorry there's so many questions, thought it would be better than starting multiple threads.
2. user_37194 Established Member Joined: Sep 2009 rotherham Posts: 1832 Be scirocco, full on 03plate track spec Saxo

   #2 1st October 2010, 23:12

   rebuilt my head, took valves out cleaned them up, new valve stem seals, new springs, new caps and new tappets.
   
   may find this usfull, pm any questions
   http://www.saxperience.com/forum/sho...d.php?t=328665

   1 user thanked this post: wicked-vtr
3. alendil Infrequent Poster Joined: Sep 2010 Posts: 167

   #3 1st October 2010, 23:41

   port it and polish it
   make masive change in higer range of revs
4. wicked-vtr Saxperience Forum Bum Joined: Jan 2009 Surrey Posts: 2608 200sx s14a mark 1 vts

   #4 2nd October 2010, 14:33

   cheers mate, that guide will help me out alot
5. VTR_Craig Saxperience Forum Bum Joined: Apr 2007 Lincoln/Newark Posts: 2673 Mercedes C220, Scooby, Saxo VTS

   #5 2nd October 2010, 14:48

   Skim, port and polish, i had the valve seats recut, new seals etc and piper valve springs
6. wicked-vtr Saxperience Forum Bum Joined: Jan 2009 Surrey Posts: 2608 200sx s14a mark 1 vts

   #6 2nd October 2010, 16:52

   Quote:

   Originally Posted by VTR_Craig Skim, port and polish, i had the valve seats recut, new seals etc and piper valve springs

   how much did this cost you if you dont mind me asking?
7. thebooth Newbie Joined: Sep 2010 alford Posts: 14 2000 mk2 saxo vtr, 106 gti front end

   #7 3rd October 2010, 21:58

   if you are going for head work i would look into tripple vavle seats and bigger vavles, also look into getting your valves shimmed up so they will stay open for longer
8. VTR_Craig Saxperience Forum Bum Joined: Apr 2007 Lincoln/Newark Posts: 2673 Mercedes C220, Scooby, Saxo VTS

   #8 3rd October 2010, 22:02

   Quote:

   Originally Posted by wicked-vtr how much did this cost you if you dont mind me asking?

   i took the head off and took it to him
   
   cost me £180 + VAT and he fitted cams, valve springs, resealed valves, recut valve seats, port and polish and skim
9. wicked-vtr Saxperience Forum Bum Joined: Jan 2009 Surrey Posts: 2608 200sx s14a mark 1 vts

   #9 3rd October 2010, 22:50

   I expacted it to be more tbh. Anyone recomend any good places to get headwork done?
10. mik Frequent Poster Joined: Mar 2009 tamworth Posts: 629 vts gti-6 XKR

    #10 4th October 2010, 00:06

    Quote:

    Originally Posted by alendil port it and polish it make masive change in higer range of revs

    need,s an expert to grind out ports and head and balance them all to the same cappacity =£££
11. Wizzy Frequent Poster Joined: Jan 2009 Wokingham, Berkshire Posts: 606 16v VTR

    #11 4th October 2010, 00:19

    Any moron can grind metal away but proper headwork = ££££
    
    On a rebulid i would do what you said plus lap the valves in & skim. Seats only need doing if they are starting to burn out. Id also check followers for wear but valve springs are only needed if going for a wild cam.
12. wicked-vtr Saxperience Forum Bum Joined: Jan 2009 Surrey Posts: 2608 200sx s14a mark 1 vts

    #12 4th October 2010, 00:34

    cheers for the replies. I would only consider having any headwork done by a reputable engine builder/tuner, its not something id attempt myself.
    Wizzy, what do you mean by "lapping" in the valves? Similar to grinding them in? Im not too clued up on this sort of thing
13. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

    #13 4th October 2010, 01:03

    No-ones really asked what your desired engine spec is yet? purpose of use? road / track?
14. wicked-vtr Saxperience Forum Bum Joined: Jan 2009 Surrey Posts: 2608 200sx s14a mark 1 vts

    #14 4th October 2010, 13:17

    Awaits posts calling me a dreamer, but I want to turbo it.
    It will predominantly be for road use, so will need to pass a mot, im not after silly power. I plan to build it with a fairly good spec so that no part is near its limit in a effort to keep it reliable ish, if that makes sense.
    Planning on using low comps, probably forged rods as well, and a t25/28 turbo.
    
    As for the head, a good port and polish will help it flow the boost better, so that will be benefical. But I doubt I will need stiff valve springs as I doubt il will rev high enough to warrant them, unless there's another reason to fit them? I wont be using stupidly high lift cams/shims as I understand that will lead to 'charge robbing'.
    Cam choice at the moment is piper bp285's (already own), standard vts cams (already own) or buying some turbo spec ones. Im also undecided about the benefits of fitting larger valves.
    
    I have a lot still to decide in regards to the head, apolagies for the long post
15. hard_corejoeboy Saxperience Forum Bum Joined: Nov 2007 Southend, Essex/Thetford, Norfolk Posts: 4203 Seat Mii Toca/VW Polo Gti 6c 1.8 turbo

    #15 4th October 2010, 13:53

    I don't know anywhere i would trust to do headwork. Seems to be a bunch of cowboys everywhere from what i've heard (and my own experience)