Fitting high lift cams into a valver

Discussion in '16-valve' started by sambo, May 19, 2006.

  1. sambo Paid Member Paid Member

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    I will be fitting some wild cams to my valver soon, 288s with over 11mm lift

    Question is will i need to do anything to the tappets like emptying them of oil so valves dont hit pistons?

    Any other advice so i can avoid any potential problems?

    Also what is correct procedure for running new cams in?

    Cheers:p
     
  2. RobT

    RobT Forum Junkie

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    if you get this wrong, your engine could be very badly damaged - from your question about the tappets - do you really know what your doing ?
     
  3. sambo Paid Member Paid Member

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    Hi rob, changed cams few times in a valver but never for a brand new ones that need bedding in

    Just a bit cautios really, thats why asking for tips and advice:)

    Asked about tappets as i'v heard before about this kind of problem
     
  4. RobT

    RobT Forum Junkie

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    the tappets (cam followers) are hydraulic and fill themselves with oil when the engine is running, if you 'empty' them, they will only fill up again when you start the engine - and if they dont fil up you have a problem and they need changing anyhow.

    You need to know you have sufficient valve / piston clearance when the cams are installed and timed properly - this is done usually with bits of plastacine on the piston crown in the engine dummy build - other ways are to fit some very weak valve springs, do dummy build, time cams and then throughout the engine cycle use a dial guage to check piston/valve clearance

    none of this is trivial, and if you get it wrong, the engine will be badly damaged

    alternative is to fit some cams that you know other (reliable) people have fitted to same engine and they have been fine

    http://www.fordmuscle.com/fundamentals/pistontovalve/

    http://www.pumaracing.co.uk/cam1.htm
     
    Last edited: May 20, 2006
  5. sambo Paid Member Paid Member

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    These are newman cams and i belive lots of people have used them

    Schrick cams of same duration probably have even more lift so i'm not worried about clearances, i was only asking for simple advice as i didnt want to overlook anything

    All my tappets were renewed with engine rebuild 4.5k ago so they should be spot on

    What oil should i pour over cams and bearings during initial install?

    Once engine starts do i run it for 10min on constant 2k rpm?

    Is this correct procedure?

    Cheers for advice rob:)
     
  6. Deako Paid Member Paid Member

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    You can get a special lube for running in cams, apply a liberal coating to all the bearings and lobes on installation. I have heard of poeple using regular oil though.
     
  7. sambo Paid Member Paid Member

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    I'v also heard about special lube hence asking about it:)

    Will however turn engine over few times by hand after the install just to make sure all is well
     
  8. Deako Paid Member Paid Member

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  9. matt d Forum Member

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    Silly not to use cam lube i think;)
    When i fitted my Shricks (1.5mm lift) I remember having some difficulty with getting the bearing caps on enough to get the nuts onto the threads.
    Be carefull not to break anything, a mate to help is usefull.
     
  10. GVK

    GVK Paid Member Paid Member

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    There's a 'nack' in doing the cams on a vw 16v, you need to get the cams together in the chain with the dots facing each other, then fit a few caps on the ex cam and then turn the cam belt pulley forward and it will open the valves on the inlet cam enough to allow the caps to be fitted in the inlet cam without too mnuch struggle.

    Sounds easy, but if you can get them fitted with the intercam timing spot on first time, have a beer on me !
     
  11. sambo Paid Member Paid Member

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    Cheers boys for advice and help

    Garry you owe me a beer! Got them in spot on first time[:D]

    Did do cams in valvers lots of times tho and do seem to have that "nack"[:$]

    Fitted kr cams just to get the engine runing on k-jet, than if all is still well with the block(took quite a big impact in crash), i will than fitt bodies, get them running with kr cams than and only than i will install wild newmans

    Hopefully shouldnt have any big probs
     
  12. TrackCab16v Forum Member

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    double check that the dots line up with the back of the head, dummy fit a standard pully ,and pop your cover on and re check all lines up ;)
     
  13. sambo Paid Member Paid Member

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    It all lined up first time, i dont take the exhaust cam pulley off anyway;)
     
  14. philip walker Forum Member

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    You dont need any expensive "cam lub" etc with the Newmans just tip some engine oil over them with the bearing caps off.
    No "special" running in either, you may find they need some revs, say 2000 rpm untill the tappets have settled down.
     
  15. sambo Paid Member Paid Member

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    Thanks phil:thumbup:
     
  16. NeoMKI Forum Member

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    thanks for this..........might have saved me a couple of days and sleepless nites :lol:
     
  17. murph81 Forum Member

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    Sorry about the thread revival!

    How did you get on in the end Sambo, what spec cams did you fit?
     
  18. LukaszGti

    LukaszGti Paid Member Paid Member

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    Would that cam require raising comp. ratio slightly ?
     

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