The soft material bearings are not particularly suited to high-torque (boosted
or diesel) motors because the soft material will extrude out from between the
journal and the shell. And it can also extrude into the oil holes in the crank
and plug them up.
----- Original Message -----
From: Bob Bundy
To: [email protected] ; Ray Ayala
Sent: Sunday, August 03, 2008 12:19 AM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
I think with the Timken wheel bearings it was a material issue. 8 identical
bearings on a GTX two per corner I replaced them all with Timken didn't look at
them other than Timken was stamped on them I had two failures and I got to
looking closer. The two that failed on different corners were stamped Timken
Mexico. Two were stamped Timken Australia and the other 4 were stamped Timken
Japan. They all came out of boxes labeled Timken USA but its really getting so
nothing gets made in the USA any more. The GTX is notorious for killing wheel
bearings and just about everybody who has put in a Chinese bearing has had
infant mortality as well. I think the German ones do well.
The bearings that FM puts in are King which cost 3 times as much are made
using a single layer of proprietary bearing material on the steel backing
rather than two separate layers.They look like there machined inside and out to
really high tolerance. I think the material is softer and thicker and will
tolerate impurities a little better and be less likely to damage journals.
There like $89 for a set of 4 bearings. The Cleveite mains I have are also
machined looking inside and out but the machining on the back side doesn't look
like it was done with tools of as much precision as the King ones. The Federal
Mogul ones look like the final coating on the bearing surfaces was sprayed on
and not machined afterward to me the back side looks as stamped.
I only have 1 rod bearing that looks bad I just don't want to have any issues
because of using this bearing in a motor that is putting out over 3 times
stock.
Bob
----- Original Message -----
From: Ray Ayala
To: Bob Bundy ; [email protected]
Sent: Saturday, August 02, 2008 8:10 PM
Subject: Re: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
Ball & roller bearings have different kinds of problems than half-shell
bearings. The cheap ones have one less ball or roller (in the same cage space)
than the good ones. That reduces their life expectancy by more than 50%
because of the geometry involved. The ball or roller surfaces crumble
prematurely. With main & rod bearings it's more a matter of the material used
and the skill of the assembler in setting up the clearances.
----- Original Message -----
From: Bob Bundy
To: [email protected]
Sent: Saturday, August 02, 2008 3:08 PM
Subject: Dana Clevite vs. Federal Mogul Sealed Power rod bearings?
I ordered Clevite rod bearings from Napa. what I got was a box of sealed
power Federal Mogul bearings with a "Napa Number" sticker over the part number
that is the Clevite part number.
Should I be concerned about this?
They say made in Mexico, where as the box of Clevite main bearings say
made in Japan.
My previous experience with wheel bearings made in Mexico was not good.
Timken wheel bearings of the same part number some made in Japan some in
Australia but the ones made in Mexico always died an early death on the 323 as
did any bearings that come from China.
Bob
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