72Dart6pack
Harder Better Faster Stronger.
Just as a reference as the type of work I do. My 408 6 Pack.
Pushing your CAM button
- Thread starter Holy Roller
- Start date
-
famous bob
mopar misfit
I used allen heads, and still had to cut the heads down some-------
Holy Roller
Well-Known Member
Does ARP sell Allen head timing gear bolts.
famous bob
mopar misfit
Don`t know, I used regular black 3/8' allen heads from a anywhere. Most are grade 8 around here. As long as possible too ! Just get the heads shorter than the button.
Holy Roller
Well-Known Member
Ok, thank you ..we have a couple of places I think I can get them.
He is working on a big block which requires a cam button.
Holy Roller
Well-Known Member
If you don't mind, would you show us some pics as you do the assembly. That would be a good "how to" on here.
No can do. Sorry.
Holy Roller
Well-Known Member
Appreciate the advice and info. anyway
PRH
Well-Known Member
Digging through some old stuff....... came across this thread.
The factory doesn’t use a button for cam position retention....... but every v8 ohv engine with factory installed roller lifters has a means to positively locate the cam.
When retrofitting a roller cam into a block that doesn’t have any factory cam position retention, it must be added.
This is just retrofit roller cam 101.
The BBM never came factory equipped with a roller cam, so when you put one in, some form of cam position retention must be employed.
The thrust button is the most common way of doing this...... but not the only way.
For example, a Jesel timing belt system has a thrust plate/bearing designed into the cover.
When the factory started installing roller cams into what were at the time the two most popular v8 platforms in the world(SBC and BBC), which up until that point did not have way to positively locate the cam........ they added camshaft thrust plates to both.
The factory doesn’t use a button for cam position retention....... but every v8 ohv engine with factory installed roller lifters has a means to positively locate the cam.
When retrofitting a roller cam into a block that doesn’t have any factory cam position retention, it must be added.
This is just retrofit roller cam 101.
The BBM never came factory equipped with a roller cam, so when you put one in, some form of cam position retention must be employed.
The thrust button is the most common way of doing this...... but not the only way.
For example, a Jesel timing belt system has a thrust plate/bearing designed into the cover.
When the factory started installing roller cams into what were at the time the two most popular v8 platforms in the world(SBC and BBC), which up until that point did not have way to positively locate the cam........ they added camshaft thrust plates to both.
Last edited:
-
