For those guys who build their own engines, what sort of clearance figures have you come up with between the cam bolt and the timing cover. On the engines I have on hand, I have measured about 0.25 inches of clearance. I am working on a cam button for the slant, a trim to fit (for clearance), that basically fits over the cam bolt. I was going to just make it 1/2 inch "tall" but the engineers have told me that this will cause some issues related to shrinkage and thick parts. I/2" would have left plenty of room to trim for clearance, but now I am thinking I might just go with something like 0.35 - 0.40" height.
Any data you guys can offer here would help.

_________________
-MattMan
LEANED & MEAN

I run a rocker bolt through timing cover. Honestly the timing cover is pretty flimsy for that but I run mine in until I see the timing cover flex. Then back it off a 1/4 turn or so. I figure that is just a "smidge of clearance and whatever interference may be there will soon wear into place. Always use a smooth head bolt on the cam.

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

I am very familiar with that style of cam stop. I have this idea and I will see it through, even if it doesn't work that well.
What's the worst that can happen.,......

_________________
-MattMan
LEANED & MEAN

Set your cam up and make sure it's all the way back in the block. Put a lump of clay on the bolt and cover with plastic wrap. Install cover with the gasket, then carefully remove cover. Slice clay and measure thickness.

_________________
Official Cookie and Mater Tormentor.

Yes, that is how I measure the clearance. I am wondering what clearances OTHER people have measured. I am in the design stages of the cam button and it would help to have as much data as I can get.

_________________
-MattMan
LEANED & MEAN

Not many do it that way. Nut and rocker adjuster is much easier.

Team Green may have done a spacer at one time.

_________________
Official Cookie and Mater Tormentor.

The timing cover will deform in the area where the button contacts it. You'll need to reinforce it by spot welding a piece of sheetmetal on to the outside of the cover. A cam button from a GM(Buick 231) is spring loaded and can be another option....

_________________
There's no such thing as too much cam....only not enough engine!

When I tear the engine down this winter I will let you know what is going on.
I ran that style of button in my 11 second 440 for a few years.
No problems.
Oh yea, a gentleman who won Indy in a Hemi Funny car in 1969 gave me the button.
Pretty sure he knew what he was doing.

_________________
Hyper_pak

Well, just an FYI. I have these in the development stage.

Cone shaped ‘button’ that fits over a 7/16” hex bolt head (5/8” wrench)
It is Derlin, roughly 0.644" total height leaving it about 0.400" above the cam bolt head (the cone part).

It fits snugly over a factory slant six cam bolt (pictured). I put a piece of paper inside the bottom just to give contrast for the picture.

_________________
-MattMan
LEANED & MEAN

That looks nice Matt. I like it.

_________________
“Buy the ticket, take the ride.”
― Hunter S. Thompson

They are very nice.

_________________
Hyper_pak

Have these made it to the "For Sale" stage yet?

_________________
Official Cookie and Mater Tormentor.

Yes, they are now for sale in my eBay store, $21.65 shipped.

https://www.ebay.com/itm/334940928290

_________________
-MattMan
LEANED & MEAN