My new RV cam is shot.So I installed my old Downey Cam.The RV cam has more kick and I want another one or something else.I drained the water first.Then I loosen valve cover,cam gear,distributor,ARP head studs,etc...No leaks & no Overheating.Did it in 2 1/2 hours with timing adjustment s before hitting the road.

How did you manage to wipe your cam out? As far as how many times can cams be swapped while leaving the head inplace...couldnt tell you since Ive never done it. I know people have done fine doing a one-time change over. Im swapping in a variation of Engnbldr's 261C this next week, but I'll be pulling the head since the engine has less than 250 miles on it. I cant see any reason to take short cuts since we are recording test data of stock vs. a new "wonder what would happen if I ..." camshaft.

The more times clamping pressure is released and then reapplied compromises the HG's ability to seal. Give her a shot, worse scenario is taking it bake apart and fixing it..provided you arent far away from home.

~Darin <img src="/forums/images/graemlins/baby.gif" alt="" />

I would vote for "none". I know some people have done it (i think someone even went so far as to wrap come-alongs around the head and block to maintain some pressure), but I would personally be wary of the headgasket's ability to maintain a proper seal after the pressure has been released. This is the main drawback I've found with this motor, the fact that the headbolts have to be removed to swap a cam... I'm happy with everything else though!