Rocker Shaft interchange?

[econoaddict]

Will the hydraulic rocker shafts from a sohc 1.6 work in a carbed 1.3?

I want to get away from the manual adjustment but don't want to screw something up.

[blkfordsedan]

The camshaft profile is specific to the mechanical lash adjustment. You'll need to swap in a hyd cam to go along with the HLA rockers.

Personally, with all the problems I have with HLA's, I would prefer to have the mechanical cam and live with adjusting the lash. Throttle response is probably better with the mech cam anyway.

[zoe60]

I didn't like the mechanical ones- very ticky. I ran my HLA rocker arms on a carbed cam for a long time with no issues. Don't know if it was right but it ran great. I ran it with the Aspire rollers at first and I know that's wrong but it ran ok. I have an FMS performance cam and HLA's now. It's no B6 but it does alright.

[FestYboy]

you can swap HLA rockers with mechanical rockers with no issues, just can't use aspire rollers on a non aspire cam. everything else will interchange with out incident. remember, it's the follower that matters, not the tappet end.

[blkfordsedan]

you can swap HLA rockers with mechanical rockers with no issues, just can't use aspire rollers on a non aspire cam. everything else will interchange with out incident. remember, it's the follower that matters, not the tappet end.

That's good to know. I figured since they are a different profile that it would be the same as trying to run mechanical lifters on a hyd grind (and vice-versa) in a V8, where the profiles are specific to the type of adjustment. It may work without causing any mechanical failure, but typically, mechanical cams have less lift & duration and slightly different ramp designs. I think I would still change the cam for optimum performance.

[econoaddict]

Cool, thanks for the info.