View Full Version : 1.73 rocker arm install

08-05-2003, 10:12 PM
how do you install rocker arms? how do you know when to shim them and when not to, etc?


08-05-2003, 10:46 PM
get ur valve covers off and if u got the peestal mount ones they should bolt righht on in place of the other ones make sure u get the torque specs

MIKE 38sc
08-06-2003, 12:45 AM
Are you useing stock camshaft and pushrods?
What are you trying to do? Are you just installing roller rocker arms on a stock engine?

08-06-2003, 08:24 AM
i have 1.73 rockers from paul at btm, ported and polished heads from blksc, 7.200" pushrods, and a dr. fred .520 cam (as soon as i get it.)


08-06-2003, 08:43 AM
First off, you will need to put the cam in the motor, the lifters in, the heads on the engine, and mount one rocker with a pushrod on the motor. Then, with a dial indicator, see how far the rod pushes the lifter plunger down with the lifter on the flat side of the cam. If it is between 20-60 thousandths, you are ok. Best to stick on the loose side of that, so 20-40 thousandths are better. If it pushes it down too far, then you will need to shim. If it doesn't push down enough, you've gotten the wrong size pushrods. I suspect Paul and Fred already know that you need 7.200 pushrods for that cam. That actually makes sense, because the 605 lift cam in my friend's car required 7.300 pushrods, and a slight shim under the lifter (15 thousandths).


35th SC
08-06-2003, 12:27 PM
With a 520 cam and the same roller rockers that you have, I ended up using 7.250" pushrods and shims.