Mercedes technology
#2578116
11/13/18 10:00 PM
11/13/18 10:00 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
OP
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OP
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Posts: 4,219
New York
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Just watched an assembly video of an AMG V8. Each piston with rings got about 4 oz. of oil...
Boffin Emeritus
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Re: Mercedes technology
[Re: polyspheric]
#2578198
11/14/18 12:12 AM
11/14/18 12:12 AM
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Joined: Dec 2005
Posts: 12,318 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 12,318
Fulton County, PA
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4oz. applied where? I used to make them dripping wet years ago, until people smarter than me said not to. Just a smear I'm told now.
If the results don't match the theory, change the theory.
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Re: Mercedes technology
[Re: polyspheric]
#2578247
11/14/18 03:36 AM
11/14/18 03:36 AM
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Joined: Mar 2003
Posts: 4,848 Memphis
HemiRick
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master
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Memphis
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4 oz of oil will not stick to any piston I've seen. 3.5 oz of that oil will drain to the pan. I say it don't really matter how much oil you put on a piston as long as there is some.
Take care, Rick 68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: Mercedes technology
[Re: polyspheric]
#2578625
11/15/18 02:37 AM
11/15/18 02:37 AM
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Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
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master
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Utah and Alaska
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the latest consumer report listed all used Mercedes Benz as cars you do not want to buy because of poor quality.
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Mercedes technology
[Re: polyspheric]
#2578666
11/15/18 10:39 AM
11/15/18 10:39 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
Posts: 1,400
Trumbauersville PA
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so are you guys telling me I shouldn't dip the assembly in used cat litter after the oil dip ?
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: Mercedes technology
[Re: polyspheric]
#2578778
11/15/18 03:35 PM
11/15/18 03:35 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
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OP
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This was known to interfere with break-in and leak-down over 20 years ago. Trust me: when interviewing for the "gunk boy" job at a major race engine builder, the first question on top of the list is chosen to remove as many "you're in the wrong place, Pizza City is next door" as possible. Question: "How much oil of the same weight as in the pan should coat the rings and lands of an engine being assembled?" Correct answer: "None, there are better choices".
Boffin Emeritus
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Re: Mercedes technology
[Re: polyspheric]
#2578825
11/15/18 05:01 PM
11/15/18 05:01 PM
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Joined: Jan 2008
Posts: 1,222 Minn
SportF
pro stock
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pro stock
Joined: Jan 2008
Posts: 1,222
Minn
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With every cylinder firing cycle you generate say 1000 degrees of heat and 500 pounds of pressure.
I would think that would be enough heat and pressure to burn and blow any excess oil from the rings in a couple of cycles. After about 5,000 cycles, just about enough time to warm and engine for a couple of "seat the rings" hits, I would think there wouldn't be much "excess" oil in there.
I'm guessing this is like a couple of other topics that show up here, opinions, but no physical proof. There is lots of "this was done, and this happened", but that is not proof.
Last edited by SportF; 11/15/18 05:23 PM.
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Re: Mercedes technology
[Re: polyspheric]
#2578855
11/15/18 06:09 PM
11/15/18 06:09 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
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OP
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Posts: 4,219
New York
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no physical proof. There is lots of "this was done, and this happened", but that is not proof.
A cause which produces an effect is not proof? It's the very definition of scientific experimentation.
Boffin Emeritus
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Re: Mercedes technology
[Re: polyspheric]
#2578873
11/15/18 06:50 PM
11/15/18 06:50 PM
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Joined: Jan 2008
Posts: 1,222 Minn
SportF
pro stock
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pro stock
Joined: Jan 2008
Posts: 1,222
Minn
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Poly, your point is well taken. But what I meant was, you put an engine together with lots of oil, no oil. Then what happens, happens. How about the way you started it, flooded, to much timing, too little, what crank oil, how long did it sit...…..what is the cylinder finish, how tight the bore....
Everything that could affect it is thrown in there, there is a lot of possibilities that can change.
What to the "big Three" do? Whatever they do, that is probably what we should do.
Anybody know?
Here is another possibility, it may not matter.
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Re: Mercedes technology
[Re: polyspheric]
#2578892
11/15/18 07:51 PM
11/15/18 07:51 PM
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Joined: Dec 2005
Posts: 12,318 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 12,318
Fulton County, PA
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I was told by a buddy, who has worked in a serious engine shop for a lot of years, excessive oil in the lands will burn and coke up causing problems with the rings. He told me I was using too much. I never used more than a few short squirts of motor oil on the rings and the skirts, spread evenly by hand, just enough to coat them with a smear. And a squirt in the cylinder evenly spread. Dunk them in a bucket of oil? I can't imagine making such a mess. And then there's this. When I hear so many different opinions, I always go searching for what the experts have to say. https://www.youtube.com/watch?v=Z66MXpVKc_0
If the results don't match the theory, change the theory.
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Re: Mercedes technology
[Re: polyspheric]
#2578899
11/15/18 08:05 PM
11/15/18 08:05 PM
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Joined: Jan 2003
Posts: 10,088 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
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Posts: 10,088
Frostbitefalls MN (Rocky&Bullw...
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Kind of simple, really. A very light coating on all sliding surfaces, just like you find when you would pull a freshly run engine apart. If you have pre oiled the system there is plenty of oil dripping/splshing onto all those parts right away.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Mercedes technology
[Re: polyspheric]
#2578929
11/15/18 09:09 PM
11/15/18 09:09 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
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New York
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If oil distribution is limited to pre-oiling there will be no oil above the oil ring.
Boffin Emeritus
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