Flushing full flow system after bearing failure

[Max Welton]

So the light came on. No pressure. Why?

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

[sub-hatchtim]

Not sure

No oil loss

Thinking a galley may have plugged up 🤷‍♂️
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58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S

[Max Welton]

That shouldn't happen if you were running a filter.

Did you find a plugged galley? What is the history of this engine?

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

[sub-hatchtim]

Haven't so far

Sees a lot of highway use here in phx, 2 round trips to LA, usually loaded up for camping
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58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S

[Max Welton]

You really need to figure out what happened.

A fresh clean engine that gets a filter should not plug a galley. Unless there was already junk in the system when the filter was installed.

What is the history of this engine before the filter was installed?

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

[sub-hatchtim]

Freshly built, new lines, cooler, etc


Yeah I'm working on trying to figure figure out what went south
_________________
58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S

[Brian_e]

Cut apart the oil filter and see what is inside of it.

I would also ask what kind of assembly lube he used. That nasty white lithium assembly grease hardens up pretty quick and can make a mess of oil passages.

What kind of pre-oil procedure did you use? Was it cranked lots without pressure before starting?

It does look like some of the oil galleys in the case were opened up some for bearing alignment. That is a good thing.

Does your crank have a straight hole for the oil galley on the main journals, or does it have the long slot/groove?

Just a few things to check.

Brian
_________________
www.type-emotorsports.com

[sub-hatchtim]

Cut open filter, didn't see anything alarming

I bypassed the full flow for break in using comp cam breaking oil

Cranked until the light came on, let it sit until the light went off, cracked until the light came on "did this a few times" then hooked up the coil and proceeded to do the cam break in procedure.

Long slotted hole in crank
_________________
58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S

[jimmyhoffa]

Yeah... this is weird... long scalloped oil holes in the center main journal, plus the late external groove bearing is a known safe / "VW approved" combination. Gives 1 & 4 rods oil through a majority of crank rotation, with a short "no oiling" period that shouldn't be an issue. Something else is up.
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1974 Chenowth 2RL #1244 Street Legal
My other car isn't ridiculous.

[esde]

If not a failure caused by contaminated oil, then one would assume lack of oil. Those 2 rods would be the first to give out as they share a supply. Perhaps a relief valve stuck open, or oil pump gear spinning on the shaft?
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modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that.

[sub-hatchtim]

I made sure to check the relief plungers on tear down

They slid nice and smooth
_________________
58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S

[Max Welton]

Did you check how well both plungers seal at the top of their travel?

What about the oil pickup tube? Any chance it got loose where it fits into the case?

PS: Here's a great thread on how the oiling system works.

https://www.thesamba.com/vw/forum/viewtopic.php?t=280293

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

[Max Welton]

Also ...

[Max Welton]

I'm looking at your photos. What the h3ll is that in the grove?

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

[Lingwendil]

[Brian_e]

I think you have a combination of 3-4 bad things.

Most likely the extra cranking with not enough, or the wrong kind of assembly lube ran the bearings dry, then they scored once it was running.

I NEVER crank for oil pressure. Always use a pressurized oil primer, or a modified oil pump cover. And back feed the oil pup to prime it. Then you know 100% you have oil pressure, long before the engine is even turned over.

Can you ask your engine builder what the oil clearances were on those rods?

Had the engine sat for a while since it was assembled?

The no filter on the engine at startup didn't help either.

Brian
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www.type-emotorsports.com

[sub-hatchtim]

[sub-hatchtim]

[sub-hatchtim]

[sub-hatchtim]

Found the culprit

Oil pump failure, the gear spins on the shaft with low resistance
_________________
58' pg/sg silo fridge westy
58 Dove blue singlecab
76 911S