Is there a “good enough” when lining up oil holes in cam bearing installation?

[Lordofthepings777]

changing cam bearings in my 400 mopar. Got new ones in and this is my first time doing it. The one with multiple oil holes are very close, but it seems no matter what direction I try to change it will make the others worse other than a tiny amount. My question is, is this good enough based on the photos? Or does the lining up have to be 100% perfect? This is the 2nd bearing from the back I’m installing (the one with 3 holes).

 

[Toolmanmike]

They look good.

 

[Big_John]

Look good to me too.

 

[MONC440]

I agree you are good

 

[CBODY67]

Looks like the holes in the bearings are a big bigger than what is in the block? Which might be a built-in "safety factor" for installation?

Enjoy!
CBODY67

 

[57fury440]

Those look fine.

 

[300George]

So, my dad taught me that Mopar engines put way too much oil to the top end. He did have a knack with the BB Mopars as some here might know. He always did a bit of offset to the cam bearing to keep more oil down low in the crank bearings.

 

[Frank Odenthal]

Engine builder pressed in the cam bearings, cam fits in very nicely, but he had problems with alignement of No. 4.
The passenger side cylinder head oil passage is half way blocked, wheras the other is sitting Perfect, as well as the lower Main feed Port.
Is this still good enough ?

I dont want to pull that bearing.
What is the best way to free up this passage if needed ?

Small round file ?
Long drill from cylinder head side ?

 

[Big_John]

When I dropped off my 273 block at the machine shop, I gave him the old cam. He said "I was just going to ask. These Mopars are tough to get right."

 

[Fury1969WI]

if it were mine i'd want to have those oil flows to the valvetrain even. As long as you plan to clean the block really good again i'd just get a round ("rat tail") file and go at it. Bearings are soft so won't take too much effort. a dental drill with an assistant running suction would be awesome for this job LOL. Good luck!!

 

[Frank Odenthal]

if it were mine i'd want to have those oil flows to the valvetrain even. As long as you plan to clean the block really good again i'd just get a round ("rat tail") file and go at it. Bearings are soft so won't take too much effort. a dental drill with an assistant running suction would be awesome for this job LOL. Good luck!!

Thank you,
I will ask my dentist to visit me at Home

 

[Fury1969WI]

Engine builder pressed in the cam bearings, cam fits in very nicely, but he had problems with alignement of No. 4.
The passenger side cylinder head oil passage is half way blocked, wheras the other is sitting Perfect, as well as the lower Main feed Port.
Is this still good enough ?

I dont want to pull that bearing.
What is the best way to free up this passage if needed ?

Small round file ?
Long drill from cylinder head side ?

View attachment 745315

hmm... maybe something like this?

12" Right Angle Flex Shaft

 

[Big_John]

The soft bearing material will just gum up the burr. You can cut that easily with a sharp knife. A utility knife blade with some tape around it to make a "handle" is my first thought.