Coating Engine Internals
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signalpuke
- Posts: 29
- Joined: Tue Oct 17, 2006 8:58 pm
- Car: 240
Coating Engine Internals
I am trying to find as much information as possible on my RB20DET. I have read on skylinesaustralia that the RB motors have an oil issue, and the main mod people are using is a restrictiction of the oil feed to the head of the engine. If that is the correct way to go about it, why didnt Nissan implement this change from the factory? I was wondering if anyone has had their crankshaft, connecting rods, and the underside of their pistons coated (teflon)? This would not only help shed the oil from these parts and send it back to the pan faster, but it would also increase HP at higher RPM due to less parrasitic drag from heavy oil 'sticking' to these parts. The process is cheap too, about $250 for the crank and rods.Do you think this would cure the oil issue in the RB motors?
The Teflon won't help. Oil isn't "heavy" and it doesn't "stick" to parts in that way. You may have a thin layer which coats parts, but once that's on there, it won't care if it's coating raw iron or Teflon, and you're still back at the oil flowing off the oil coating. So you have viscosity to deal with- which, in a running engine at temperature, isn't an issue.I don't know about the oiling problem, if it is one. Ask the fellows who are posting about it.
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skylndrftr
- Posts: 1908
- Joined: Wed Sep 22, 2004 11:40 am
- Car: 07 Nissan Versa S
2010 Ariel Atom (pending...)
I can't speak to this specific case but a couple general rules
the restriction to the head was most likely to put higher oil pressure into the bottom end by reducing flow to the head. This is not down to reduce the oil/air vapor or oil sticking to parts...
theres often more problems from people overfilling motors with oil than underfilling. you have to significantly underfill a motor for it to run the sump dry, however given packaging its often easy to overfill it to the point of actually forcing the crank to slice through the oil puddle.
don't put teflon in your engine, it will melt. Now before you say "but I cook with it" you don't put it in the oven, and thats for maybe an hour at a time on the stove anyways. The teflon will heat up and the motion of the rods and pistons will actually cause it to creep...and come off and plug filters and also significantly inhibit heat transfer.
the restriction to the head was most likely to put higher oil pressure into the bottom end by reducing flow to the head. This is not down to reduce the oil/air vapor or oil sticking to parts...
theres often more problems from people overfilling motors with oil than underfilling. you have to significantly underfill a motor for it to run the sump dry, however given packaging its often easy to overfill it to the point of actually forcing the crank to slice through the oil puddle.
don't put teflon in your engine, it will melt. Now before you say "but I cook with it" you don't put it in the oven, and thats for maybe an hour at a time on the stove anyways. The teflon will heat up and the motion of the rods and pistons will actually cause it to creep...and come off and plug filters and also significantly inhibit heat transfer.