i just fitted a brand new cvh 35 kent cam kit done everything right loads of cam lube etc ran it in for 20 mins at 2500 rpm sounds perfect when idle but when you rev it a little it sounds taperty if you know what i mean a light tapping sound any ideas what it could be

 

like tappets tappety or low tapping? ....did u get the whole cam kit or just the cam?

 

your head may be worn where the lifters slot in mate

 

yeah , whole kit or just a cam itself?
if you do not lower the rocker assembly with a smaller washer , you will have a horribly tappety sound as the lifters are now extended to max and cannot follow the valve

 

i fitted the whole kit sounds as its being ran in water than oil

 

i had a similar prob with a vernier which did not "butt up" against the washer . the slot on the vernier had worn slightly and was knocking against the key on the cam , very noisy at idle , went away with some rpm
this washer actually keeps the vwernier in place , check it out and tighten

 

Your rockers may be worn to a point wher the hydraulic lifters can't soak up the clearance......

 

hi mate is there anyway to check if the rockers are worn ?

 

well you can check the obvious things like looking at them but it will be hard to tell.

To be honest, the only way the top end can tap, is if there is gaps.

If you spin the engine over in the same manner as you would to check valve clearnces using the rule of 9, you can play with each rocker and see if there is any noticeable play, if there is that indicates wear, if its tight and no slop then that should be a good indication there is no wear

you did say you fitted a brand new cam and set of lifters didnt you?

 

yes mate full kit cam , lifters , springs etc the thing is it was sort of making the same noise before i changed the cam thats why i replaced it

 

Check the clearances as i said above

 

what oil it on? Loads are a bit tappy even when new. Luck of the draw - not detrinental to peformance though.

 

it has got 0-40 mobil one

 

you need 10-40 for cvh hydrolic lifters.... they are all noisy on 0-40....its a tad to thin,

millers 10-40 race spec fully sinthetic oil is the booolocks,

and you also may have low oil flow to the head, if its quiet at idle.

 

Could just be some air still in the lifters. Needs some RPM to get rid of it.

 

as above.... try givin her a run for a while... with sum right foot action every so often...

shud help...

 

i have put 10-50 oil in it now but still the same
ok i will take it out for a good thrash see if that helps

 

don't thrash it, just take it for a good drive!!

 

15-50 fully synthetic oil is all I put in mine now. I just make sure she's warmed up before i give it some.

 

Yes i agree, i only use mobil 1 15-50 oil.

 

update tried all the above new rockers new oil 10-50 still got the cvh death rattle

 

Low oil pressure? Blocked oil ways?

 

oil pressures ok

i got the head and cam from jamsport so the head is really clean no oilways blocked

 

And the cam and lifters were definately brand new?

 

take the dizzy off and make sure in the end of the camshaft there is a ball bering not a hole if its missing thats why its rattleing its nuts off

 

Hows that? Loss of oil pressure or something?

 

did you put tappets in oil b4 you fitted them. put them in a tub and cover them in oil to get the air out of them

 

yea causes loss of pressure had i b4 on a piper cam

 

ian r Lets not go into Piper cams

saphc05, if you leave lifters in a tub of oil to soak there is no way that alone will get the air out, the hydraulic lifters meter oil so pressurised oil fed into them will remove air quickly and effeciently

 

being a ford tech since 1988 ive found that leaving lifters in oil does help cos ive seen other people just throw them in and have problems though you are right pressurised oil should remove the air but this is not always the case, safer to have oil in on start up than a couple of seconds after

 

Don't get me wrong i always leave mine in a tub of oil anyway, just the way you worded it made it sound like you relied upon this to remove all the air

 

sry m8 will try to be more clearer next time