Roller lifter crossbar pin rubs on the valley wall

[bsprowl]

On my BBM engine I cannot get three of the Morel lifter pairs into place; one lifter in each of three pairs doesn’t have enough clearance. 

The easiest solution is put the link away from the valley wall, but I’ve never seen them installed that way.  The other solution is to grind clearance in the valley wall.  The amount it appears to be small – probably less than a 1/16”.

Any comments?

The number of strange little problems I'm having is surprising.

[fekbmax]

I have always placed link bars towards center of valley. 

[blykins]

Link bars face toward center of lifter valley.

[bsprowl]

Oh...

Thanks I've never built a roler cam engine before - obviously.  I wonder what else I'm mesing up. 

Time will tell...

[HarleyJack17]

Assuming you got a custom grind cam, and/or likely from Comp....be certain to check the cam bolt thread pitch. Comp can, and does, swap cores and the thread pitch can differ from OEM.
There is no data, no nothing....you are just expected to know this. At least this is how it was circa 2016.

[blykins]

Assuming you got a custom grind cam, and/or likely from Comp....be certain to check the cam bolt thread pitch. Comp can, and does, swap cores and the thread pitch can differ from OEM.
There is no data, no nothing....you are just expected to know this. At least this is how it was circa 2016.

Might seem frustrating, but there's a method to their madness.  Not only Comp, but pretty much any other cam grinder. 

They all buy their cores from the same place and only specific grinds can be used on specific cores.  It may be that someone orders a large hydraulic roller and it will only fit on a solid roller core, or something like that.  Different cores have different bolt thread/pitch depending on the use. 

You can buy a SBF custom solid roller and it will be ground on a core with a 3/8-16 bolt hole or you can buy a large hydraulic roller and the only core it will fit on will be a solid roller core with a 7/16-20 hole. 

Just depends. 

[galaxiex]

Assuming you got a custom grind cam, and/or likely from Comp....be certain to check the cam bolt thread pitch. Comp can, and does, swap cores and the thread pitch can differ from OEM.
There is no data, no nothing....you are just expected to know this. At least this is how it was circa 2016.

Might seem frustrating, but there's a method to their madness.  Not only Comp, but pretty much any other cam grinder. 

They all buy their cores from the same place and only specific grinds can be used on specific cores.  It may be that someone orders a large hydraulic roller and it will only fit on a solid roller core, or something like that.  Different cores have different bolt thread/pitch depending on the use. 

You can buy a SBF custom solid roller and it will be ground on a core with a 3/8-16 bolt hole or you can buy a large hydraulic roller and the only core it will fit on will be a solid roller core with a 7/16-20 hole. 

Just depends. 

Brent, regarding FE's are there sometimes differences in the cam dowel pin size as well?
I had to ream the cam gear dowel hole as it was too small for the pin that fit the custom hyd roller I got from you.
Not throwing shade on you, I realize you probably have no control over what the cam core has for dowel diameter.
I bought a 0.3125" reamer to ream the cam gear dowel hole.

OR was my cam gear dowel hole under size?
I bought the cam gear/chain kit from POP.
It's the needle bearing machined setup.

The 0.310" dowel fit nice in the gear, but sloppy in the cam.

The 5/16" / 0.3125" dowel that fit nice in the cam would definitely NOT fit thru the cam gear as it was.

I have a good used cam dowel that came from stock FE and a new dowel that I bought (don't remember where)
and both the original used dowel, and the new one measure 0.310"
Both a sloppy fit in the cam, but fit nice in the cam gear prior to reaming.

Everything I find online says the FE uses a 0.3125 or 5/16" dowel.
Yet I have 2 examples that are 0.310"

What gives?
What's the "real" FE cam dowel size?

Thanks!

[blykins]

When you're dealing with multiple aftermarket parts it's just an issue of tolerance stacking.

What I would say, and it probably doesn't help much, but the size is whatever you need for a nice slip fit into both the cam and the gear.  I don't like press fit pins at all and will usually ream to fit.  If it's a tad loose, green Loctite will firm it up.  Pins are just used for location, not for clamping.  The cam bolt keeps everything together.

[MeanGene]

My neighbor across the street that owns the local speed n machine has a favorite saying- "the more expensive the aftermarket part, the less likely it's going to fit"

[pbf777]

       Look, it's printed on the same piece of paper that came in the box that says: "NO WARRANTY" , it also says: " SOME 'FITTING' MAY (will ) BE REQUIRED"!   

       Scott.