Camshaft / oil spray bar

[e21-Mark]

I'm swapping the camshaft in my car for a Schrick one but is there any way of improving on the oil feed via the spray bar? Is it better to just fit a new one and leave well alone?

I've noticed my car sounding a bit 'cammy' lately but I'm unsure if there is anything more than usual engine noise? Does anyone else have the same sort of sounds?

I am having new guides, valve stem oil seals etc, but am I right in thinking there are no real gains to be made from flowing an m20 731 head?

[Jason_323i]

The trouble is normally too much oil to the head in a tuned engine, if the stock spray bar does not work then you have a problem else where

Jason

[e21-Mark]

So better to just fit a new standard bar when the head is rebuilt then Jason? What should valve clearnces be set too?

[murran]

isnt it .25mm cold, both exhaust and inlet?
if its sounding tappety it might just need them setting.

[e21-Mark]

Thanks. I had a cO check done and they seemed to think that they might be a bit tight? Would that cause the noise too?

[murran]

shouldnt do, but it will cause the slipper pads on the rocker and cam to eat each other.

usually if theyre too tight you'll be loosing a bit of compression if the valves being held off its seat slightly.