I am going to have my engine block out and changing the cam out, so I figured I'd take a preventative measure and pin the cam bearings as well. However, I for some reason can't seem to find any previous threads that really describe this process.

Any help?

Thanks

 

how much spring pressure are you going for? its usually reserved for big power big cam NA guys

anyways you can drill down through the valley for the middle bearings and go at a slight angle for the end bearings. tiny little set screw like an 8-32 or something.

 

Why and how would you want to "pin" the cam bearings? Are you concerned about them coming out? If you use the correct set of cam bearings for your block then it shouldn't be an issue, they fit very tight. If you need the added assurance then use Loc-Tite stud and bearing mount (green colored).

 

This isnt a small block chevy. Just use a good set of durabond bearings to fit your block (there are 2 separate types depending on year) and have no worries. The only real reason an ls bearing would spin is due to severe abuse and a very very bad oiling issue. Ive seen one in 8 years. It was a 5.3l that had oil pressure issues.

http://www.ws6project.com/user_stor/catalog/index.php?cPath=235_87_555&sort=3a&filter_id=296

The P series are the heavier duty ones.

 

Heck, if you are going to go through all that work, just install roller cam bearings.

 

its not a terrible amount of work to pin them, but it's totally unnecessary with any sort of sane cam that can be street driven.

if you are running cam that needs like 250# seat pressure and 750 on the nose, then i'd pin them.

roller bearings imo are much more trouble than they are worth on most everything. if your application needs it, you arent asking the internet about pinning a stock block.

 

How would you do that?

 

Block is already bare/apart, so pinning them would be a simple extra step. Looking for someone who has actually done this before and how they did it.

 

Just like I said in my first post boss. Very common in my youth, putting hydraulic rollers in old BBC's

Fwiw there are some guys on yellow bullet that still do this type of stuff...maybe ask over there for more guidance
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Yeah, that's what I'm asking, how do you do that?

 

well you want the new bearings in the block

then you check their fit with the cam youre gonna use.

then you drill the holes and tap them and put in a set screw. you want it to be below flush of the bearing surface, just enough above the block bore surface to grab some of the steel backing of the bearing.

then check the fit again, sometimes them distort a little.

but again I gotta say there really isnt much use for it. if you need high spring pressures for a big aggressive hydraulic roller, just get an 8620 core so it doesnt flex and spin the middle bearings.

 

Drill holes with them (bearings) in place? I don't think that's possible to get a straight shot onto the area where it would need to be and if you go drilling an angled hole into your bearing surface your going to end up with a cobbled mess, the head of the "set screw" would have to be below the bearing surface. Loc-Tite makes adhesives for this.

 

Yeah its below the babbit layer, just enough to grab the steel backing. But, whatever you say chief. Just telling you how it's done.

 

You drill through the main bearing saddle up to the cam tunnel.

 

**** that'd be way easier. had to go look at an ls oiling diagram. i'm still stuck in the 90's lol

 

Just how thick do you think those cam bearings are that you can run a set screw into it? Can you show an example of this ever being done? By anybody? You know, drilling all the way through the main saddle. Do you know of a sponser on this site that offers that offer this? That's just B.S.

 

It was an option with ERL, I'm sure any decent machine shop can do this,
Just because you are not familiar with something does not mean it doesn't
exist.

 

FWIW, the Gen III bearings are .700-.890" thick depending which hole it's for.

 

They never offered any such thing. Please show a link to that service or a link where anybody's build on this site where this proceedure was done and I'll eat crow and take it back, I call B.S. Who is going to drill holes in their main saddles, the holes would counter bored to be bigger than the set set screw, the bearing would have to have a precise depth hole drilled in it and be aligned, this sounds like a great deal of work and, well, B.S. Once again, Loc-tite makes an adhesive for this purpose. Show the link, any link and I'll correct myself.

 

Hey OP, try this first.
https://www.jbtoolsales.com/loctite-...FZNgfgodokIAqg