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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Sun Nov 28, 2021 8:40 pm Post subject: Flushing full flow system after bearing failure |
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Smoked 2 rod bearings today
What's the best procedure to clean out my full flow system
External oil cooler with thermostat _________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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Max Welton Samba Member
Joined: May 19, 2003 Posts: 10697 Location: Black Forest, CO
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Sun Nov 28, 2021 9:22 pm Post subject: Re: Flushing full flow system after bearing failure |
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Yes there's a filter, I run wix _________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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Max Welton Samba Member
Joined: May 19, 2003 Posts: 10697 Location: Black Forest, CO
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74 Thing Samba Member
Joined: September 02, 2004 Posts: 7369
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Cusser Samba Member
Joined: October 02, 2006 Posts: 31268 Location: Hot Arizona
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Posted: Mon Nov 29, 2021 7:49 am Post subject: Re: Flushing full flow system after bearing failure |
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sub-hatchtim wrote: |
Smoked 2 rod bearings today. |
Did you determine what caused this???? _________________ 1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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Glenn Mr. 010
Joined: December 25, 2001 Posts: 76760 Location: Sneaking up behind you
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Posted: Mon Nov 29, 2021 7:54 am Post subject: Re: Flushing full flow system after bearing failure |
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Years ago I had an aluminum rocker get chewed up. I filled the engine with kerosene and ran it for a few seconds and the drained it. I did this 3 times then filled with oil and drive it 30,000 miles before it eat a valve. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Mon Nov 29, 2021 8:44 am Post subject: Re: Flushing full flow system after bearing failure |
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Cusser wrote: |
sub-hatchtim wrote: |
Smoked 2 rod bearings today. |
Did you determine what caused this???? |
I haven't
Was driving around 25 mph didn't even make it out of my neighborhood
Oil light came on, coasted into a parking lot, could hear some engine clatter, shut it down
#1 and #4 rod bearings are gone, the journals on the crank have light scoring and the oil passages are crammed full of bearing material
The cam, main bearings and 2 and 4 rod bearings look fantastic
92x69 _________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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jimmyhoffa Samba Member
Joined: February 16, 2014 Posts: 1046 Location: St. Louis
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Posted: Mon Nov 29, 2021 9:13 am Post subject: Re: Flushing full flow system after bearing failure |
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I'd be curious about the crank style and center main bearing style. Rod #1 and #4 are both fed from the center main, and rod #2 and #3 each get to enjoy their own personal main bearing source for oil.
I tore down 8 cores recently, all slightly modified/rebuilt at one time, and 6 of the 8 had visibly pronounced wear on the #1 and #4 compared to everything else. _________________ 1974 Chenowth 2RL #1244 Street Legal
My other car isn't ridiculous.
Last edited by jimmyhoffa on Mon Nov 29, 2021 10:31 am; edited 1 time in total |
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Mon Nov 29, 2021 9:44 am Post subject: Re: Flushing full flow system after bearing failure |
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Other than full flowed it was a stock bottom end
jimmyhoffa wrote: |
I'd be curious about the crank style and center main bearing style. #1 and #4 are both fed from the center main, and #2 and #3 each get to enjoy their own personal main bearing source for oil.
I tore down 8 cores recently, all slightly modified/rebuilt at one time, and 6 of the 8 had visibly pronounced wear on the #1 and #4 compared to everything else. |
_________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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esde Samba Member
Joined: October 20, 2007 Posts: 5927 Location: central rust belt
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Posted: Mon Nov 29, 2021 9:53 am Post subject: Re: Flushing full flow system after bearing failure |
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Anywhere that may have had debris needs to be cleaned with solvent and a brush, rinsing or flushing never gets what a brush will. Thankfully, the filter should have protected everything between it and the bearings.
But you really have to wonder about the cause of this failure. How many hours on this motor? _________________ modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that. |
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Mon Nov 29, 2021 10:10 am Post subject: Re: Flushing full flow system after bearing failure |
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Around 6k miles in my westy _________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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Brian_e Samba Member
Joined: July 28, 2009 Posts: 3227 Location: Rapid City, SD
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Posted: Mon Nov 29, 2021 10:27 am Post subject: Re: Flushing full flow system after bearing failure |
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Did you check to make sure the oil feed hole in the bearing saddle was fully uncovered? It sounds to me like it might have been partially blocked by the bearing and starved the rod bearings.
You can usually see the witness mark on the backside of the used bearing half.
Post some pictures of the oil feed hole in the center main on the crank, and also the center main bearings. I am also interested in which combo of crank/bearings you used.
Brian _________________ www.type-emotorsports.com |
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Mon Nov 29, 2021 10:32 am Post subject: Re: Flushing full flow system after bearing failure |
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I'll snap some pics this afternoon
This engine was assembled by a local engine builder
Brian_e wrote: |
Did you check to make sure the oil feed hole in the bearing saddle was fully uncovered? It sounds to me like it might have been partially blocked by the bearing and starved the rod bearings.
You can usually see the witness mark on the backside of the used bearing half.
Post some pictures of the oil feed hole in the center main on the crank, and also the center main bearings. I am also interested in which combo of crank/bearings you used.
Brian |
_________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Mon Nov 29, 2021 5:23 pm Post subject: Re: Flushing full flow system after bearing failure |
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_________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Mon Nov 29, 2021 5:25 pm Post subject: Re: Flushing full flow system after bearing failure |
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One thing I found odd during tear down, when I pulled the dog house cooler and stand not a single drop of oil came out _________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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Max Welton Samba Member
Joined: May 19, 2003 Posts: 10697 Location: Black Forest, CO
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Chickensoup Samba Member
Joined: January 06, 2018 Posts: 5368 Location: Good Hope, GA
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Posted: Mon Nov 29, 2021 6:06 pm Post subject: Re: Flushing full flow system after bearing failure |
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Max Welton wrote: |
sub-hatchtim wrote: |
One thing I found odd during tear down, when I pulled the dog house cooler and stand not a single drop of oil came out |
Normal. The oil drains out when the engine stops.
Max |
not a single drop??
ive torn down a few engines that have been sitting for 20 plus years. oil came out of all the coolers. even the ones without oil in the sump. both early and late coolers. _________________ -'85 c10 5.3 LS, 222 cam, long tubes, x pipe, 3 inch spin tech's
-'05 B5.5 TDI Wagon 17in sport rims ;EGR + BSM + ASV Delete, Stage-2 Tune, straight pipe
'65 Tourist Delivery Build
'66 RIP
'69 RIP
Hosea 4:6 "My people are destroyed for lack of knowledge" |
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Max Welton Samba Member
Joined: May 19, 2003 Posts: 10697 Location: Black Forest, CO
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Posted: Mon Nov 29, 2021 6:14 pm Post subject: Re: Flushing full flow system after bearing failure |
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Chickensoup wrote: |
Max Welton wrote: |
sub-hatchtim wrote: |
One thing I found odd during tear down, when I pulled the dog house cooler and stand not a single drop of oil came out |
Normal. The oil drains out when the engine stops.
Max |
not a single drop??
ive torn down a few engines that have been sitting for 20 plus years. oil came out of all the coolers. even the ones without oil in the sump. both early and late coolers. |
My experience is different.
Then again, maybe we just discovered what killed his engine.
Hey sub-hatchtim, was there any oil in the engine when you tore it down?
Max _________________ 1967 Type-3 Fastback
Under the Knife https://shoptalkforums.com/viewtopic.php?f=24&t=151582
Home Stretch https://www.thesamba.com/vw/forum/viewtopic.php?t=767836 |
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sub-hatchtim Samba Member
Joined: September 19, 2006 Posts: 2610 Location: Phoenix AZ
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Posted: Mon Nov 29, 2021 6:27 pm Post subject: Re: Flushing full flow system after bearing failure |
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Yes and I had just checked the oil _________________ 58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S |
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