full or half groove main bearings

-
I figured the runout would bother me, even though I know it wouldn't actually matter. Its hard to see in the pic but there is enough of a lip that I could hold it in a 3 jaw if I wanted.
 

Show us a link to Ebay's full groove, race .001" main bearings for the SBM.
 
gregcon said:
Show us a link to Ebay's full groove, race .001" main bearings for the SBM.
### Grooved bearings in general
U do a little digging or ask seller and many many times u find what you seek ( Simple Process ) !
Just like I did finding these grooved bearings for my LA .
Click to expand...

20210115_185142.jpg


20210114_200136.jpg
 
Here is a listing for small block Chebby on ebay so get on the phone etc and see if King offers such for LA
Worth a shot !

Screenshot_2021-01-31-14-28-08.png
 
Those aren't full groove nor are they the race bearings.

As for King, you can forget it. I've made at least three phone calls to their tech line. They catalog the bearings but none are available and in three weeks they will begin production. Three weeks from when? From the date that you ask.
 
gregcon said:
Those aren't full groove nor are they the race bearings.

As for King, you can forget it. I've made at least three phone calls to their tech line. They catalog the bearings but none are available and in three weeks they will begin production. Three weeks from when? From the date that you ask.
Click to expand...
Those are Race bearings according
To 1979 Speed Pro catalog
 
In 1979 they might have been but they've been superceded by a new generation, Clevite uses the H designation for example.
 
gregcon said:
In 1979 they might have been but they've been superceded by a new generation, Clevite uses the H designation for example.[/QUOTE
I dont have me book with me
Click to expand...
gregcon said:
In 1979 they might have been but they've been superceded by a new generation, Clevite uses the H designation for example.
Click to expand...
I will enlighten u when I have my book in my possesion these are Clevite 77
That name or patented abbreviation was used for several bearing manufacturers content://media/external/file/207596s-
 
I understand they are Clevite. The P series is a mid-level bearing, the H is the race bearing. There's nothing wrong with P series, but like anything else.....hard to ignore the H series when you know it's there.
 
gregcon said:
I understand they are Clevite. The P series is a mid-level bearing, the H is the race bearing. There's nothing wrong with P series, but like anything else.....hard to ignore the H series when you know it's there.
Click to expand...
I think H series is a Nascar bearing if my memory serves me correctly.
 
Cross drill the crank. When you drill a hole in something, you weaken it....
The original cross drilling concept of the 60s/70s has been discredited in recent years. I forget the reasons, but you will probably find the info on the net.
 
My machinist tells me to use my mini dremel tool to cut a groove in my un-grooved bearing shells.

Im using King bearings with half groove shells.
 
I often see 'recommendations' to grind a groove, or enlarge a hole, in brg shells. Grinding or drilling metal raises an edge.
Given that the oil clearance is usually 2-3 thou, that is 1-1.5 thou radially.......
which means if the burr left from grinding is higher than 1.5 thou, the burr will scratch the crank. Good luck to anybody who can feel anything that small!
 
Just a FYI. I have been doing my own full groove mains for the slant six for 40 years. I use a die grinder with a cutoff wheel, "freehand". Doesn't look pretty, but it works. Never had a oil related failure since I started doing this. Also never saw any problem with the crank, on future teardowns.
 
Bewy said:
I often see 'recommendations' to grind a groove, or enlarge a hole, in brg shells. Grinding or drilling metal raises an edge.
Given that the oil clearance is usually 2-3 thou, that is 1-1.5 thou radially.......
which means if the burr left from grinding is higher than 1.5 thou, the burr will scratch the crank. Good luck to anybody who can feel anything that small!
Click to expand...
No burrs left if you dress the new groove with 2000 grit paper or Scotch brite.

Ive been told this is std. procedure on Pontiacs....
 
I'm not a fan of using abrasives on any bearing. You know why.

The saving grace of having burrs on a bearing is that the metal is much softer than the crank. They'll get smushed down or dislodged before they hurt the crank. I'm not saying it's the best way to operate, but it's not a crank killer either.

After I groove my bearings...I plan to debur them using a steel edge tool (no abrasives) and then get them coated. If that's not good enough...too bad!
 
You must log in or register to reply here.
-
Back
Top Bottom