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Hi!

Is there any difference between the rocker posts for smalbore and bigbore (smal vs. oval pad 'folded' rockers)? Or are they interchangeable? I hope for the latter, saves me a head gasket

Background: I installed a smalbore 'folded' rocker assembly (smal, round pads) to a 1275, assuming they were the same. Now that I found out how bad they sit on the valves, I want to change them over for the oval pad type rockers. But I'm not sure whether the offset for the rocker shaft is different between round & oval pad type rocker assemblies.

Situation now:



Regards,
Jan

PS: I hope you get what I'm on about

As far as I am aware the 3 types of rocker post are;

Early alloy (850 only)

Sintered (most common by a mile)

Forged (Cooper S only)

As far as I a aware there are no dimensional differences worth noting, you can get spacers to move the rockers around on the shaft to align them as well as possible.

Hi Mark!

Ok, thanks a lot!

I know about the spacer trick (MiniSpres sells even a shim kit), but since I need to pull the shaft I'm it's not more wok to just chnage the rockers. And if it's true that the oval pad rockers give a wee little more lift...

Regards,
Jan

Mmmh - yes, I think that looks a lot better!



I had indeed fitted the smal pad ones... Easy to spot the difference, once you know about the two different rockers.

Much better!