replacing rocker arms/roller rockers when rebuilding head ?

[franx]

I had one of the rocker arms broken (valves floated with too many rpm's + did some damage) , a piece of the rocker lodged itself between the cams and made some nice drawings on them :dead:

When we are rebuilding the head, do we need to change all the rockers or just the broken one? The mech says they feel a bit "rough" on the roller-part and this may mark up/damage the new cams..

I had a look a the price for these rockers and they're very expensive, 30 pounds a piece i believe! When i need 16 it does'nt add up to the prices i've seen on here for refurbed heads; so are they always re-used ?

thanks

 

[Dan@SJM]

I've never replaced them, that's because in the ones I've done I haven't ever seen a worn set

 

[franx]

So in your cases the cams must have also been unscaved? My cams looked like this on some of the lobes:

Hoping that just replacing some of them will be allright, do'nt know if they wear differently which could mean all of 'em have to be done..?

 

[franx]

:bump:

 

[Dan@SJM]

Tbh if it was my personal engine if probably use them again, just as its only my labour/money I'm playing with. I'd probably micro polish the cams to get them as smooth as possible.

 

[franx]

^^the cams are shot , these pics do'nt really show the damage. I'm wanting to go with some new Schricks as they come pretty close to the C&B spec that i was running. My mechanic only warned about the rockers feeling "rough" and was afraid these might mark up the new cams.. he's wanting to replace them.

As far as i can see replacing the rockers is just about "not done" by anyone, or at least not written about on here.. ca'nt find any info on it anyway

 

[franx]

here's one where you can see the damage a bit better

 

[Dan@SJM]

Ah I see, yeh I'd replace the rough rockers then, my understanding was you were asking about the cams on the new rockers sorry!

 

[mr.pink87]

I'd replace the rockers. Would be a shame to ruin a set of Schricks with shot rockers.

 

[Ph1 Tom]

I have a full set of good rockers. Also a set of hydraulic followers. PM me if you need anything

 

[franx]

^^ great stuff! Next questions immediately arises; are there differences between ph1 + ph2 rockers+lifters ?

 

[MicKPM]

Nope, they're all the same across the 16v petrols including 1.4/1.6