Just wondering if the cams need to be broken in?????

 

If your valves are swapped around or rotated during the install, then they may take a while to re-seat themselves...

 

Humm.. Is it typical to swap or rotate the valves during a cam install?
Beroz

 

I've never done it. I don't know what all is involved with changing out the valve springs. My assumption is that the cams are removed, and the valve springs are installed with the head and valves in place 1 cylinder at a time, while the cylinder is pressurized with air to hold the valves tightly closed.

 

gernby,
hum...very interesting.... IF they do need to be broken in I won't be able to dyno the car immediately...that sucks.....As you know the cams require new springs.... so maybe you are right!!!!! I'll find out from TODA......
Thanks gernby......BTW, I have some questions that you might be able to answer under the diff between mustang and dyno jet forum........
Beroz

 

I would think that because we have roller followers the breakin is minimal. Solid tappets have some cam face mating to do but we have roller tappets.

 

Just talked to the installers... They told me they might have to take the head off to install the springs.... They said they don't have the tools to do it without taking the head off.....hummm I am confused........ Could anyone explain this scenario to me... I don't understand why they need to take the head off....
Beroz

 

It sounds like they need to remove the head so they can hold the valves in place to install the springs. Otherwise, the valves will fall into the cylinder. I know I read something about compressing the cylinder with air (200 PSI) to hold the valves in place.

 

Yes that is exactly what they said... if this is indeed the scenario, will breaking in be required?

Beroz

 

Do a compression test before and after the install. If the compression for all 4 cylinders is unchanged, then the valves should be seated fine. If not, they will have to reseat themselves, and you will need to do a valve clearance adjustment.