Oiling issue?

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1bdapl
Driving Mom's Station Wagon
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Joined: Fri Aug 17, 2012 6:44 pm

Oiling issue?

Post by 1bdapl »

I seem to keep having an issue with number three rod. Three different engines and all three have had issues with number 3 rod bearing. Anyone else have this issue. Or an answer to this issue?
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Gotenks64
Knows Some Stuff About 240's!
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Re: Oiling issue?

Post by Gotenks64 »

What issues are you actually having?
Built Head w/ BC stage two 264/264 Cams
Cosmetic Head Gasket
.020 Over Bore with Wiseco 9:1
Eagle Rods
Fully balanced rotating assembly
Stock flywheel
Spec Stage 3+ Clutch
ARP'ed Everything
Clevite Bearings
SARD 850cc Injectors
1bdapl
Driving Mom's Station Wagon
Posts: 32
Joined: Fri Aug 17, 2012 6:44 pm

Re: Oiling issue?

Post by 1bdapl »

Spinning number three bearing. 2 engines were stock the third was built. clearances were right on spec. New oil pump, etc.
All three spun number three rod bearing. No part or system has been the same on all three. The built motor was running a oil cooler and still always seems to be number 3
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nissanfanatic
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Re: Oiling issue?

Post by nissanfanatic »

What oil and filter?

What conditions did the engine fail under?
-Cory

2020 Subaru WRX
A long time ago...
https://www.ka-t.org/cory_b.php
Use Linux...
1bdapl
Driving Mom's Station Wagon
Posts: 32
Joined: Fri Aug 17, 2012 6:44 pm

Re: Oiling issue?

Post by 1bdapl »

I believe I found the issue with the last motor but just seems weird that it is always number 3 rod.
Mobil one oil and filter. Drifting when each one has gone.
I had stock oil pan and with the side loading on this last engine it was uncovering the oil pickup
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Gotenks64
Knows Some Stuff About 240's!
Posts: 259
Joined: Tue Dec 27, 2011 7:02 am

Re: Oiling issue?

Post by Gotenks64 »

Do you have the cars tuned? Is there gas in the oil?
Built Head w/ BC stage two 264/264 Cams
Cosmetic Head Gasket
.020 Over Bore with Wiseco 9:1
Eagle Rods
Fully balanced rotating assembly
Stock flywheel
Spec Stage 3+ Clutch
ARP'ed Everything
Clevite Bearings
SARD 850cc Injectors
1bdapl
Driving Mom's Station Wagon
Posts: 32
Joined: Fri Aug 17, 2012 6:44 pm

Re: Oiling issue?

Post by 1bdapl »

Yes engine was tuned each time. No gas in the oil.
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Gotenks64
Knows Some Stuff About 240's!
Posts: 259
Joined: Tue Dec 27, 2011 7:02 am

Re: Oiling issue?

Post by Gotenks64 »

What flywheel are you running?
Built Head w/ BC stage two 264/264 Cams
Cosmetic Head Gasket
.020 Over Bore with Wiseco 9:1
Eagle Rods
Fully balanced rotating assembly
Stock flywheel
Spec Stage 3+ Clutch
ARP'ed Everything
Clevite Bearings
SARD 850cc Injectors
1bdapl
Driving Mom's Station Wagon
Posts: 32
Joined: Fri Aug 17, 2012 6:44 pm

Re: Oiling issue?

Post by 1bdapl »

stock flywheel. entire rotating assembly was balanced
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Gotenks64
Knows Some Stuff About 240's!
Posts: 259
Joined: Tue Dec 27, 2011 7:02 am

Re: Oiling issue?

Post by Gotenks64 »

Oil type and weight?
Built Head w/ BC stage two 264/264 Cams
Cosmetic Head Gasket
.020 Over Bore with Wiseco 9:1
Eagle Rods
Fully balanced rotating assembly
Stock flywheel
Spec Stage 3+ Clutch
ARP'ed Everything
Clevite Bearings
SARD 850cc Injectors
1bdapl
Driving Mom's Station Wagon
Posts: 32
Joined: Fri Aug 17, 2012 6:44 pm

Re: Oiling issue?

Post by 1bdapl »

Mobile one 5-30
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nissanfanatic
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Joined: Sat Nov 20, 2004 1:16 pm

Re: Oiling issue?

Post by nissanfanatic »

http://forums.nasioc.com/forums/showthr ... ?t=2472787

Subarus tend to be pretty hard on oil, but M1 5w-30/10w-30 tend to shear down very fast.

Switch to something a little more robust like M1 0w-40/Rotella T6/German Castrol. They are probably cheaper as well.
-Cory

2020 Subaru WRX
A long time ago...
https://www.ka-t.org/cory_b.php
Use Linux...
1bdapl
Driving Mom's Station Wagon
Posts: 32
Joined: Fri Aug 17, 2012 6:44 pm

Re: Oiling issue?

Post by 1bdapl »

Ok so changing the oil weight will explain why it is always the number3 rod??
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Gotenks64
Knows Some Stuff About 240's!
Posts: 259
Joined: Tue Dec 27, 2011 7:02 am

Re: Oiling issue?

Post by Gotenks64 »

It may be the culprit or you have extremely bad luck with that rod. I would run a heavier weight oil. I run 5W-40.
Built Head w/ BC stage two 264/264 Cams
Cosmetic Head Gasket
.020 Over Bore with Wiseco 9:1
Eagle Rods
Fully balanced rotating assembly
Stock flywheel
Spec Stage 3+ Clutch
ARP'ed Everything
Clevite Bearings
SARD 850cc Injectors
User avatar
nissanfanatic
SuperMod
Posts: 5078
Joined: Sat Nov 20, 2004 1:16 pm

Re: Oiling issue?

Post by nissanfanatic »

1bdapl wrote:Ok so changing the oil weight will explain why it is always the number3 rod??
#3 rod has always been the first to go on KA's.

Reasoning is probably due to it receiving the lowest amount of oil flow.

The oils I mentioned have produced very good wear numbers on numerous engines under extreme duty such as racing. OIl is more than just the numbers on the front of the bottle. The biggest variables are HTHS, wear additives, detergents, and Used Oil Analysis results. Considering it has the single largest impact on bearing life, I would look into it.

Also, for weight arguments sake, your 5w-30 turns to a 20w at 224*F. Say you hit 250*F, and you are at the lower end of 20w oils. And these numbers are all based on fresh virgin oil. Once it has been in the pan for a couple months and has sheared down from use, your even further up the creek... More robust oils will withstand shearing down better. This is why I run Motul 300V in my track car.

http://www.corelab.com/saybolt/cms/docs ... lator.aspx
http://www.bobistheoilguy.com/viscosity-charts/
-Cory

2020 Subaru WRX
A long time ago...
https://www.ka-t.org/cory_b.php
Use Linux...
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