just fitted new cam "still tapping"
12-08-2006, 02:40 PM
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1981
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just fitted new cam "still tapping"
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 
any ideas what it could be
12-08-2006, 04:12 PM
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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
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
12-08-2006, 04:58 PM
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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
this washer actually keeps the vwernier in place , check it out and tighten
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12-08-2006, 05:36 PM
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Originally Posted by SafeChav
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 ?
12-08-2006, 06:09 PM
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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?
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?
13-08-2006, 03:04 PM
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Originally Posted by Rick
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
13-08-2006, 03:39 PM
#14
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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.
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.
15-08-2006, 12:10 PM
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Originally Posted by mitchrst
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
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!!
03-09-2006, 11:54 AM
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Originally Posted by SafeChav
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
03-09-2006, 01:11 PM
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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 
03-09-2006, 01:24 PM
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Originally Posted by ian r
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
Loss of oil pressure or something?
04-09-2006, 09:23 AM
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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
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
04-09-2006, 05:45 PM
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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
05-09-2006, 09:30 AM
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Originally Posted by saphc05
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
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