hi, couple questions :

will 3.5 sohc heads fit my 3.0 ? cause i pretty sure the rear head on me magna is not good.

it doesnt matter wether it hot or cold ,and its definately not any rod/main bearings , theres a quick rapping / tapping noise coming from the rear head and seems to be mainly towards the dizzy side of the head.. ( used a stethascope ) . a complete timing belt/pulley kit was put in about 6 weeks ago, and i just recently replaced the valve lash adjusters with new ones,
NO WEAR on the rocker arms or shafts , cam lobes are fine. no broken valve springs.

also checked the oil holes in the shafts and rocker arms , all ok , put some thicker engine oil in and moreys oil stabilozer in , MAYBE made a tiny bit of differance .
the noise is there , sorta most of the time.

the only possible thing maybe , is the oil holes feeding the top end is blocked or partially blocked ?
this really HAS GOT ME STUMPED ..... i usually end up sorting things out , but NOT THIS !!
any body got suggestions ?

mark krawczuk