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Oil Pressure Drop

  • Thread starter Thread starter ryonker
  • Start date Start date
ryonker said:
So, if the bike is really hot (while riding) and when I stop at a light and the pressure is between .5 and 1 psi at idle, I shouldn't worry about that? Nessism, you said yours goes that low sometimes as well?

Thanks everyone!!!!!!!!!!!!!!!!!!!

Rick
Click to expand...

No worry with that kind of oil pressure, perfectly normal.
 
Update

Update

I connected with Terry, and he told me to change out the O ring that sits on the Hex ended sensor module. Come to think of it, mine was pretty smashed (no longer a nice rounded O ring, it was a flat ring :eek: ) so I had to screw it in pretty tight to seat it and keep it from leaking oil.

So I put a beefier O ring on and screwed in the sensor module (thus reducing the oil pressure need to push it open...ie. shortening the distance by moving the sensor out a little). Then, voila..:idea:, no more oil light turning on or flickering.

I let the engine warm quite a while. Initially, with choke on, pressure surged up to 12 psi. dropping back to 4 then 3psi with choke of. It ran 3 psi quite a while then dropped back to about 2psi but not much less!

So I think it is all working quite like it should :D!

Thanks everyone for all the great help!

Thanks Terry for the final solution!!!!!!

Rick
 
Your oil pressure will be very low at idle once the oil is hot. Both my bikes run at about 1 psi or a little less when hot, and around 4 psi while cruising. That is normal.

Nessism,

I have played around with dozens of oil pressure gauges. The VDO is the most accurate one I have tried. If your gauge does not go back to zero, it is probably defective or you raced the motor too high while the oil was cold, thus causing it to "peg" and screw up the internals. I have had a few VDO gauges that registered above zero right out of the box.

If you bought the gauge from me, send it back and I'll do a warranty exhange.
 
ryonker said:
I let the engine warm quite a while. Initially, with choke on, pressure surged up to 12 psi. dropping back to 4 then 3psi with choke of. It ran 3 psi quite a while then dropped back to about 2psi but not much less!

So I think it is all working quite like it should :D!

Rick
Click to expand...
factory spec 1.42psi @3,000 rpm @ 60c oil temp...
 
Also, with the cooler and lines on my GS1000, I had to add about 1/2 quart extra to the engine. When the bike is on the center stand, the oil shows just above the top of the site glass.
 
So, if the bike is really hot (while riding) and when I stop at a light and the pressure is between .5 and 1 psi at idle, I shouldn't worry about that? Nessism, you said yours goes that low sometimes as well?
Click to expand...

mine does that ...sits down real low at idle when hot , but runs up to about 10 to 12 psi when im nailing it and sits at about 7 to 8 psi when cruising. i dont have an idiot light as the sensor had to go to make way for the external head feeds .
i have an ?80 glycerin filled gauge plumbed in thru the headstock and out the top nut ...so i can see it whilst riding . thing is these beasties have roller bearing cranks which run on a gnats fart ofpressure anyways , so i wouldnt worry about the low pressure reading at standstill. id worry if that were the case whilst you were motoring :rolleyes:
 
here you can see the head feeds ...whose adapter plate kinda stops you using a pressure sensor. so i plumbed in off the rear gallery up through the steering stem to the bars for the gauge :)


works pretty good
 
Nice photos Saffa!

Renobruce...thanks for the pressure gauge. Mine works just fine. Drops right back to 0 with bike off. Needle holds steady and it's easy to read.

Happy Riding :D


Rick
 
ryonker said:
I connected with Terry, and he told me to change out the O ring that sits on the Hex ended sensor module. Come to think of it, mine was pretty smashed (no longer a nice rounded O ring, it was a flat ring :eek: ) so I had to screw it in pretty tight to seat it and keep it from leaking oil.

So I put a beefier O ring on and screwed in the sensor module (thus reducing the oil pressure need to push it open...ie. shortening the distance by moving the sensor out a little). Then, voila..:idea:, no more oil light turning on or flickering.

I let the engine warm quite a while. Initially, with choke on, pressure surged up to 12 psi. dropping back to 4 then 3psi with choke of. It ran 3 psi quite a while then dropped back to about 2psi but not much less!

So I think it is all working quite like it should :D!

Thanks everyone for all the great help!

Thanks Terry for the final solution!!!!!!

Rick
Click to expand...

No worries Rick, sorry I haven't been around much of late, I've been working away from home during the week and busy making Honda CB750 oil cooler adapters to send to the US on weekends, and I didn't even realize you'd started a thread on the subject.

It was interesting to read some of the theories and possible solutions raised by the guys here, sadly, unless you're actually looking at something and don't really understand how it works, it's easy to get way off base, I guess.

I'm glad you contacted me for the solution, something as simple as a worn out O ring could have caused you to spend a lot of time testing theories that wouldn't have helped at all.

I bought one of RenoBruce's 20 dollar VDO oil pressure gauges too, and it looks great! Cheers, Terry.
 
Thanks for the adaptor and cooler Terry! I have been riding alot (starting commuting this week) and the cooler works great!

I gladly recommend your adaptors and work to anyone!!!!!


Cheers!

Rick
 
ryonker said:
Thanks for the adaptor and cooler Terry! I have been riding alot (starting commuting this week) and the cooler works great!

I gladly recommend your adaptors and work to anyone!!!!!


Cheers!

Rick
Click to expand...

No worries Rick, if you're happy, then so am I! Cheers, Terry.
 
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