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Old 05-29-2023, 12:16 PM   #1
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Oil pressure spike

Started coach this morning, oil pressure gauge spiked to 65 psi. Normally 48 psi with no issues. Currently, while driving is at 50-52. What do you think?
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Old 05-29-2023, 12:30 PM   #2
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Not a problem. I get well over 60psi when I first start. Once warmed up, I have about 25psi at idle and about 50psi at anything above idle.
Later...
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Old 05-29-2023, 12:33 PM   #3
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What was the outside temperature? Oil pressure running is good....enjoy the ride.
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Old 05-29-2023, 12:34 PM   #4
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Tom

My gauges (digital) are all encoded with a green section and a plain section, and I hate to admit this but I have no real knowledge of proper and appropriate pressures or temperature. My eyes simply focus on the dash, and if all the needles are within the green bandpass, my eyes move back to the road and my brain stops worrying about it. I have no real idea what numbers are on the scale.... only if the needle is in the green area. So I am of no help to you and apologize for my ignorance on this issue .. ..

Oh, and all my meter "needles" have always been within the green zone

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Old 05-29-2023, 12:44 PM   #5
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X15 turning 1500-1520 rpm oil pressure constant 35 psi. It doesnít go much above that on a cold start, maybe 45 psi, 20-25 at idle.
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Old 05-29-2023, 03:26 PM   #6
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High oil pressure can be as bad as NO oil pressure as it MAY indicate a blocked oil passage. May be something as simple as a bit of crud that may resolve itself or it may indicate something as serious as a spun crank bearing that is blocking just one crank journal's oil passage (which will give you higher oil pressure, but not as high as if the entire oil system were blocked). I'd keep a very close eye on the oil pressure and if it doesn't return to what you consider normal, I'd pull a SOAP sample and check for wear metal.
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Old 05-29-2023, 05:49 PM   #7
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Thanks for the insight.
My oil pressure has always lived at 48psi. To be honest, I canít recall if it ever drops to 25 psi at start because I usually go right into fast idle.
Temps in mid 70ís and good weather.
For whatever reason, psi shot up to, I would guess, around 65psi.
I let it go through fast idle to get to ride height. Then shut down. After we brought in the slides, I did a quick engine inspection, checked oil, added just 3/4 quart to top off.
Upon restart, gauge came down a bit but bounced while acceleration out of park.
Shut off engine, hooked up toad, upon restart, psi was a bit north of 50psi. Drove 200 miles with psi steady between 48-51psi. No deviation with engine break or shifting up and down hills.
I will see what happens when we pull out in a few days.
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Old 05-30-2023, 09:34 AM   #8
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Quote:
Originally Posted by RayandWendy View Post
Not a problem. I get well over 60psi when I first start. Once warmed up, I have about 25psi at idle and about 50psi at anything above idle.
Later...
Ray
Same as Ray.
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Old 05-30-2023, 09:49 AM   #9
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Possibly the relief valve in the oil pump or in the filter stuck. If so it should clear itself in the pump, the filter could have a defective one. 65 psi is nothing to really be concerned with.
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Old 05-30-2023, 09:49 AM   #10
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Originally Posted by bevandtomH View Post
. After we brought in the slides, I did a quick engine inspection, checked oil, added just 3/4 quart to top off.
Never add oil , unless the engine has been shut off for at least an hour at full operating temperature . 2>3 hours if shut down cold .
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Old 05-30-2023, 10:00 AM   #11
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Never add oil , unless the engine has been shut off for at least an hour at full operating temperature . 2>3 hours if shut down cold .
Why ?
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Old 05-30-2023, 10:02 AM   #12
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I never add oil till it is to the "Add" mark on any dip stick.........thats why the stick says add on it........... learned this from a old engine builder a long time ago. Some might find as I did years ago, that the oil level might just stay between the lines but when at the full mark it will go down in time of running.
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Old 05-30-2023, 10:24 AM   #13
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Originally Posted by palehorse89 View Post
I never add oil till it is to the "Add" mark on any dip stick.........thats why the stick says add on it........... learned this from a old engine builder a long time ago. Some might find as I did years ago, that the oil level might just stay between the lines but when at the full mark it will go down in time of running.
In addition the dipsticks are not always calibrated to our rear mounted engines. The only way to be sure is an oil change using gallon jugs, not Speedco with bulk fill to the "full" line. If the correct measured amount of oil is between add and full, mark it with a file, that is the new full line. Any oil above the mark will be thrown out and wasted. Also makes oil splatters on the toad.
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Old 05-30-2023, 10:34 AM   #14
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On my old gauges the oil pressure was slow to respond and hard to really tell what it was.
So I installed a Silverleaf that displays on my tablet. Great tool. But when the engine would get hot and I got into stop and go traffic I saw the oil pressure drop to ~20 psi, I got worried. I did some research and found the the 20 psi was normal, the pressure switch that throws the CEL is ~10psi (maybe lower).



On my high side, when it's cold it goes to ~80 psi and then warm at highway speeds it will be ~55psi.



I do have an alarm set up on my Silverleaf for volts, engine and transmission temp, and oil pressure so I hear an alarm is something is out of wack. I heard it when road debris took out my radiator and I lost all my coolant.

My wife took the coach to a dog show last weekend and said she didn't want to fool with the Silverleaf, I told her the coach doesn't move until it is displaying the engine vitals and explained why.
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