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
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 ?
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
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
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
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.
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
Demon Tweeks sell cam lube. http://www.demon-tweeks.co.uk/products/ProductDetail.asp?cls=MSPORT&pcode=NIMA380000HE Only 1oz bottles though, but cheap.
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.
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 !
Cheers boys for advice and help Garry you owe me a beer! Got them in spot on first time 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
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
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.