jcfrx7

What are symptoms of a spun bearing?

KhanArtisT

iTrader: (2)

Wtf

Howstuffworks.com/how a rotary engine works.

But since I come from a platform where engine rebuilds are tune ups, it sounds like rodnock/hammer hitting your motor/ clack clack clack clack sound that gets louder and faster as you rev higher. Power loss obviously, make sure its coming from the bottom of your motor.

jcfrx7

^ Thanks for the input. I should be able to see any bearing particles in my oil if this happened right.

jcfrx7

oh yeah the only reason Iam asking this question is because my oil pressure is maxin out at 110psi at 3000rpm and someone told me it could be a bearing.

KhanArtisT

iTrader: (2)

Uh...I don't know if you're talking about your RX7 or not, I assumed you werent. Rotary engines don't have rod bearings, thats why I told you to learn how it works. Here:

http://www.rotaryengineillustrated.c...animation.html

110psi? Holy ****. Well, when a bearing does spin you'll notice lower oil pressure, higher is usually good.

NOPR

actually, rotaries have pressed in bearings in the stationary gears and rotors. they can spin like any other bearing.

KhanArtisT

iTrader: (2)

Ah, ok. I assumed he meant rod bearing

Wankel7

I would guess a loss of engine power and all sorts of debris in your oil . However, the bearing material isn't ferrous so it won't stick to a magnet.

James

Stanello

iTrader: (1)

Some of it will stick to a magnet.

You can actually hear spun bearings. It's a slight whirring sound. You can also feel slight pulses/vibrations through the clutch pedal and shifter.

Do an oil change and check for copper shavings in the old oil.

My5ABaby

iTrader: (7)

Are you getting 110psi on your stock gauge or an aftermarket one? Stock gauges aren't particually accurate.

jkimbro

iTrader: (3)

It's copper, and it would show up in your oilpan.

Terrh

iTrader: (7)

spun bearings make a whirrring sound, if you're using the stock gauge it's probably just an electrical issue.

jcfrx7

I have changed the oil and no sings of copper or any other metals. I am going to drop the oil pan to check the pressure regulators and or may bee changing them out to a new one. All my pressure measurements were taken with a mechanical gage. Thanks for the info everyone.

Aaron Cake

iTrader: (1)

Symptoms:

http://www.aaroncake.net/rx-7/damage.htm

The engine will make strange knocking or scraping noises, idle speed will be lower, metal shavings in the oil, less power and the engine can eventually seize up.

jcfrx7

Well I do not have these symptoms. So I think Ill be all right. The only thing is this oil pressure in which is not really too bad to have 110psi but it concerns me because is a turbo engine and I don’t really want to damage any seals on the turbo. May bee is because is a JDM engine....Does anyone know if the JDM engines came with different oil pressure regulators?

RETed

Several people have mentioned it already, but you seem to not listen to them.
I dunno who told you high oil pressure = spun bearing, but they are wrong.
The stock oil pressure sender is notorious for going bad.
Why don't you check this out first?


-Ted

jcfrx7

I am listening and I already mention that I used a mechanical gage to get my readings. I know that the pressure sender is no good. I’m only trying to gather some info so I can either troubleshoot more or just let it be.

Juan

Aaron Cake

iTrader: (1)

Someone may have swapped the pressure regulator. Unless you are having other problems, just leave it alone. The stock turbo has a restrictor which will deal with the increased pressure.

RETed

Sorry about that - I missed that part of the thread.

Are you measuring oil pressure with everything fully hot?
If you're just measuring cold temps, very thick oil can read very high, especially if it's cold outside.
Do you know what weight oil you are using?

No, the stock FC oil pressure regulator, even J-Spec, should all be the same.


-Ted

jcfrx7

Yes I wait to normal temp of engine and Iam using 10w30.