|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
04-27-2021, 12:13 AM | #1 |
Senior Member
Join Date: Aug 2012
Location: Perth, Western Australia
Posts: 2,687
|
Whats up with this bearing?
This is the center main bearing I just pulled out, was in the engine 3 years. What gives?
__________________
"Came too close to dying to stop living now!" |
04-27-2021, 01:12 AM | #2 |
Senior Member
Join Date: May 2015
Posts: 7,933
|
Re: Whats up with this bearing?
__________________
The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
Sponsored Links (Register now to hide all advertisements) |
|
04-27-2021, 01:49 AM | #3 |
Senior Member
Join Date: May 2010
Location: Masterton, New Zealand
Posts: 3,816
|
Re: Whats up with this bearing?
I've seen many flathead bearings like that...too many! What the cause is I'll let the experts explain
__________________
Unfortunately, two half wits don't make a whole wit! |
04-27-2021, 01:56 AM | #4 |
Senior Member
Join Date: May 2010
Location: MN
Posts: 7,053
|
Re: Whats up with this bearing?
I'm no expert. I'd say it is what it is. Probably run as is for another 3 years or more. Crank bearings are not typically line bored hence the wear on the leftside. It's a imperfect world we are just driving in it.
|
04-27-2021, 02:30 AM | #5 |
Senior Member
Join Date: Oct 2019
Location: Carthage , Tennessee
Posts: 199
|
Re: Whats up with this bearing?
Looks like the bearing is delaminates from the base material .
You see some bearings have slight chunks come off sometime like this . You might consider swapping in some new ones . As long as the crank journals look good,,,,I wouldn’t worry too much . Do a good visual inspection of the cap also,,,,,to be sure . The wear pattern looks good,,,,,no serious gouges,,,,,you should be good . All bearings are not created equal,,,,,,these things are made in a machine,,,and they are made fast,,,,,sometimes the bonding just isn’t perfect. Also,,,,,well,,,,you get it . Tommy Last edited by Desoto291Hemi; 04-27-2021 at 02:35 AM. |
04-27-2021, 05:35 AM | #6 |
Senior Member
Join Date: May 2010
Location: Chester Vt
Posts: 8,842
|
Re: Whats up with this bearing?
Sponsored Links (Register now to hide all advertisements)
|
04-27-2021, 03:36 PM | #7 | |
Senior Member
Join Date: May 2010
Location: Yakima Washington
Posts: 913
|
Re: Whats up with this bearing?
Quote:
Use a trimetal bearing like a Clevite 77 they are a hi performance bearing, steel back a layer of copper and a thin layer of tin/babbitt. The thick layer of tin/babbitt is soft/compressible and the continued flexing fatigues the tin/babbitt layer and starts to crack and fall out. The trimetal bearing with the copper layer and thin tin/babbitt layer doesn't have this problem. I had this same problem in race engines. Bill |
|
04-27-2021, 04:05 PM | #8 |
Member Emeritus
Join Date: May 2010
Location: Fitzgerald, Georgia
Posts: 2,204
|
Re: Whats up with this bearing?
This is a typical example of bearing damage from "lugging" the engine. Of course their can be other causes, including a faulty fusion of the outer layer.
|
04-27-2021, 04:09 PM | #9 |
Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,197
|
Re: Whats up with this bearing?
Too much clearance and old bearings
You running a filter Rob. Lawrie |
04-27-2021, 07:22 PM | #10 |
Senior Member
Join Date: Aug 2012
Location: Perth, Western Australia
Posts: 2,687
|
Re: Whats up with this bearing?
Good answers guys ,thanks.
This engine was the one that they lost the caps too and I had to get others so it was line bored. Lawrie ; Clearance should have been spot on the guy that did the crank said it was basically blueprinted [?] . The bearings were new . Yes I did the 90% oil filter setup. John ;Lugging, interesting.. Most of my driving is too and from work however I drive it like I stole it most of the time . Ron; Too much oil pressure, possible but does not go over 60 lbs. One of my worst problems is that I dont get the oil hot enough most days so the pressure does stay high. Bill; good info the the types. Well if theres anyone in Oz with a spare .030 bearing let me know
__________________
"Came too close to dying to stop living now!" |
04-28-2021, 11:42 AM | #11 |
Senior Member
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,013
|
Re: Whats up with this bearing?
If it was mine, I'd replace the entire main bearing set - with a recently manufactured set. I'm running King Bearings on many of my recent engines - have not seen an issue like this to date. Check your clearances - as every bearing manufacturer is a bit different.
I've also had good luck with Clevite/Mahle P-Series bearings . . . just a little bit pricey. Question: Whose bearings and are they NOS/vintage manufacturer or recent? |
04-28-2021, 04:11 PM | #12 |
Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,197
|
Re: Whats up with this bearing?
Rob, clevite are hard to get but you can get them here.
Lawrie |
04-28-2021, 04:33 PM | #13 |
Senior Member
Join Date: May 2010
Location: Masterton, New Zealand
Posts: 3,816
|
Re: Whats up with this bearing?
The bearing pictured is out of a 21 stud engine. Now it's hard enough to source genuine Ford bearings for these early engines, let alone aftermarket...The only aftermarket bearings I've seen for these motors were Repco brand. I don't think King make them....
There is an antique engine reconditioner here in NZ that can re-metal shells, often the only alternative when playing with real obscure makes. Rob, just keep looking, you'll find a replacement. Good luck!
__________________
Unfortunately, two half wits don't make a whole wit! |
04-28-2021, 06:14 PM | #14 |
Senior Member
Join Date: Sep 2011
Location: Christchurch New Zealand
Posts: 1,603
|
Re: Whats up with this bearing?
Could try Reds Antique Parts as opposed to Reds Headers.
I have had some useful brgs etc from him Phil NZ |
04-28-2021, 07:44 PM | #15 |
Senior Member
Join Date: May 2010
Location: Charlotte NC KiWi-L100 available here
Posts: 2,945
|
Re: Whats up with this bearing?
Or Fred
Barnfind08 |
04-29-2021, 08:38 PM | #16 |
Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,197
|
Re: Whats up with this bearing?
Rob , Did you get some bearings?
Lawrie |
04-29-2021, 09:04 PM | #17 |
Senior Member
Join Date: May 2010
Location: Masterton, New Zealand
Posts: 3,816
|
Re: Whats up with this bearing?
Rob, reading the adverts I see Chuck has .030 mains -front and centre.
__________________
Unfortunately, two half wits don't make a whole wit! |
04-29-2021, 11:25 PM | #18 |
Senior Member
Join Date: Aug 2012
Location: Perth, Western Australia
Posts: 2,687
|
Re: Whats up with this bearing?
Thanks BB
NO Lawrie haven't started looking locally yet... Lead?
__________________
"Came too close to dying to stop living now!" |
04-30-2021, 02:17 AM | #19 |
Senior Member
Join Date: May 2010
Location: Qld, Australia
Posts: 4,197
|
Re: Whats up with this bearing?
Have you tried auto surplus.
Lawrie |
04-30-2021, 06:04 AM | #20 |
Senior Member
Join Date: May 2010
Location: Southern France
Posts: 5,279
|
Re: Whats up with this bearing?
Got my set for a 36LB from C&G 3 yrs ago.The rod bearings were harder to find
|
Thread Tools | |
Display Modes | |
|
|
Sponsored Links (Register now to hide all advertisements) |
|