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Old Dec 29, 2006 | 12:25 PM
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Default Oil Pressure


I've got a 2000 Classic but no owners manual. What should the oil pressure be under normal riding conditions with a warm engine?
 
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Old Dec 29, 2006 | 01:20 PM
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Default RE: Oil Pressure

5 at idle and 30 at running speeds.They don't carry much oil pressure.
 
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Old Dec 29, 2006 | 01:23 PM
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Default RE: Oil Pressure

Are you having a problem, or just asking? There are some things that can be done to help oil pressure if need be.
 
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Old Dec 29, 2006 | 02:08 PM
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Default RE: Oil Pressure

My 01service manualsays 9-12 at idle.
30 to 38 at 2000 rpm with engine atnormal operating temps. (230deg F).
JL
 
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Old Dec 29, 2006 | 03:06 PM
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Default RE: Oil Pressure

That's about what my 2000 Ultra reads, between 30-40 at 2000-3000 rpm.
 
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Old Dec 29, 2006 | 05:37 PM
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Default RE: Oil Pressure

ORIGINAL: Taterdog


I've got a 2000 Classic but no owners manual. What should the oil pressure be under normal riding conditions with a warm engine?
Normally 10 pounds for every 1000 rpm is normal for all internal combustion engines.
 
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Old Dec 29, 2006 | 07:00 PM
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Default RE: Oil Pressure


Thanks, everyone. No problem (I hope), just needed some info since it seems to be running on the low side, but I don't know what normal is.

I'm running around 7 to 10 at idle and 30 to 32 at 2000 rpm. Never seems to go much higher when warmed up. Probably okay, just didn't know where it should be. The previous owners supposedly have used HD syn since new.
 
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Old Dec 30, 2006 | 10:33 AM
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Default RE: Oil Pressure


ORIGINAL: Taterdog


Thanks, everyone. No problem (I hope), just needed some info since it seems to be running on the low side, but I don't know what normal is.

I'm running around 7 to 10 at idle and 30 to 32 at 2000 rpm. Never seems to go much higher when warmed up. Probably okay, just didn't know where it should be. The previous owners supposedly have used HD syn since new.
That's fine. It will be a little higher on cold startup but settles into the range you posted once warm. Harley engines don't need a lot of pressure. I've seen some that barely register pressure at idle on the guage at all once warmed up.
 
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Old Dec 30, 2006 | 12:40 PM
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Default RE: Oil Pressure

Someone correct me if I'm wrong please, but from what I've heard H-D's run on VOLUME rather than high pressure... There can still be high volume movement even at low pressures - it just depends on the size of the channels/galleriesit is passing through. In the case of H-D motors it appears they flow alot of oil but don't run at high pressure.
 
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Old Dec 30, 2006 | 12:51 PM
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Default RE: Oil Pressure

[sm=exactly.gif]

Except for the lifters and the oil jets spraying the bottom of the pistons, HD engines will run with very little pressure. They are ball and roller bearing design which is different from most auto engines that use plain bearings and need high oil pressure to keep from self destructing.
 
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