Engine Oil (again)

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The Plunger
Posts: 262
Joined: Mon Sep 03, 2012 8:48 am
Location: West Des Moines, Iowa

While I'm here, is it wise to

Post by The Plunger »

While I'm here, is it wise to flush the motor? I'm thinking an annual flush might help keep the slingers clean and wash away any other debris, or, perhaps, it might do more harm than good?
Brian
Bikeless

"A man without a bike, is a man without a purpose."
Nietzche, I think

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schrader7032
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Joined: Fri Oct 27, 2006 3:00 am
Location: San Antonio, TX

Never heard of that.

Post by schrader7032 »

Never heard of that. Imagine, though, by trying to flush things you push some debris into the lower rod holes which feeds to the bearings or maybe plugs the hole to the bearings. The stuff that is trapped in the slingers is out of the way and will no do any harm...not worth stirring things up.

I understand that the low pressure oil pump shoots a stream of oil onto the spinning slinger disk. The oil then is slung out to the outer edges/cup. The heavy particles are compressed into the cup...the oil builds up or stacks up and the top edge of that oil falls into the rod bearing holes.

IMO it's best to leave things alone.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

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The Plunger
Posts: 262
Joined: Mon Sep 03, 2012 8:48 am
Location: West Des Moines, Iowa

Kurt, I'm thinking it would

Post by The Plunger »

Kurt,
I'm thinking it would help prevent buildup in a new motor where there isn't much debris to begin with. I believe the procedure is to add or replace about 16oz to oil, run it up to temp and then drain it all. By the description, it SAYS it works. Here's a link to Amsoil's version:

https://www.amsoil.com/shop/by-product/ ... SEQAvD_BwE

I'm getting close to my first oil change on the new motor and am mulling this over.

Brian
Brian
Bikeless

"A man without a bike, is a man without a purpose."
Nietzche, I think

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schrader7032
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Joined: Fri Oct 27, 2006 3:00 am
Location: San Antonio, TX

All I can say is that I've

Post by schrader7032 »

All I can say is that I've never heard anyone mention this approach before. Your engine...your choice. Give it a try and report back in 40K miles! :D
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

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Twocams
Posts: 771
Joined: Sun Mar 16, 2014 8:42 pm

Plunger, I wont put that

Post by Twocams »

Plunger, I wont put that snake oil in a modern engine. Why put it in a vintage engine. Says its good for engines and automatic transmissions, there is a big difference between the two and there make up. If you change the oil every 1500 miles and drop the oil pan once in a while to clean it out. Would be better. But.......

twocams
Twocams
92 R100RT/69 R69S
2004 Aprilia Atlantic 500cc single cylinder Scooter
83 Honda V65 Magna, fastest production bike in1983

312Icarus
Posts: 458
Joined: Fri Jul 15, 2016 1:53 am

Flushing

Post by 312Icarus »

While I'm here, is it wise to flush the motor? I'm thinking an annual flush might help keep the slingers clean and wash away any other debris, or, perhaps, it might do more harm than good?

Anytime I have heard about “engine flushing” especially with an older engine, it has ended badly. I had a friend who had a slant 6 valiant, and engine known to run literally forever. He decided one day it was time to do an engine flush, which he did. Ten days later the engine locked, mains and rods torn to shreds. Flushing loosened all the gunk just fine, only to deposit it on running surfaces and that was the end.

Icarus

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stagewex
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Joined: Sun Oct 26, 2014 8:18 am

I actually don't know enough

Post by stagewex »

I actually don't know enough about and wouldn't bother to flush my old '69's engine however it is close to 50 years old so not a new motor or new engine build described.

However... I have a marine big block (454) out for complete rebuild and refurbish right now that is very close to being completed.
As part of my 2 year warranty it stipulated that after initial start-up and running the engine, all oil and filters have be changed at no more than 20 minutes runtime. 20 minutes!
After that just regular routine servicing. I guess that's almost the description of a "flush"?

But the engine does have filters, our old bikes don't.
mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol, 1991 Honda XR250L

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