Oil pressure up 15 psi?!??!
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Road Captain
Joined: Jan 2006
Posts: 508
Likes: 14
From: Tallahassee
Oil pressure up 15 psi?!??!
I have an 08 Roadglide with the FM 107 kit. The bike has 30,000 total miles with the 107 at about 5000.
Recently my oil pressure went up about 15psi. Ideling hot it would normaly be about 10, its showing about 25. Riding around 2500rpm when warm it would normaly be about 35psi, now its 50+. When I fire it up cold it is at 60psi!!!
The cam plate, oil pump, etc are all stock.
I am not getting any wierd noises and the bike is running great.
This week I changed the oil, filter and took off the oil cooler to blow it out and change the lines. I also checked the wiring behind the fairing. No change in oil pressure.
I guess the next step is to put a analoge mechanical gadge on the motor to see if it really is that high or is my oil pressure gadge flakly (I have Dakota Digital gadges).
I have been concerned with the stock flywheel/rod assembly as the FM 107 makes good power.
But if it was crank runout too high I would think I would notice other problems like noise and other horrable things.
I will put a mechanical gadge on it this weekend but was wondering what besides a clog, would cause oil pressure to go up so much?
Any input would be greatly appreciated.
Thanks for your time,
Doug
Recently my oil pressure went up about 15psi. Ideling hot it would normaly be about 10, its showing about 25. Riding around 2500rpm when warm it would normaly be about 35psi, now its 50+. When I fire it up cold it is at 60psi!!!
The cam plate, oil pump, etc are all stock.
I am not getting any wierd noises and the bike is running great.
This week I changed the oil, filter and took off the oil cooler to blow it out and change the lines. I also checked the wiring behind the fairing. No change in oil pressure.
I guess the next step is to put a analoge mechanical gadge on the motor to see if it really is that high or is my oil pressure gadge flakly (I have Dakota Digital gadges).
I have been concerned with the stock flywheel/rod assembly as the FM 107 makes good power.
But if it was crank runout too high I would think I would notice other problems like noise and other horrable things.
I will put a mechanical gadge on it this weekend but was wondering what besides a clog, would cause oil pressure to go up so much?
Any input would be greatly appreciated.
Thanks for your time,
Doug
Road Warrior
Joined: Sep 2009
Posts: 1,267
Likes: 6
From: Northern Michigan
If gauge check out OK it could be the pressure bypass spring/check valve on the oil pump is bad or plugged.
The wife has the 107" also on her TG , 14k+ miles with no problems, its just what tubby needed to get it going.
The wife has the 107" also on her TG , 14k+ miles with no problems, its just what tubby needed to get it going.
Last edited by icebite1; Mar 7, 2013 at 10:30 AM.
Road Master
Joined: Apr 2012
Posts: 1,096
Likes: 17
From: San Jose
I would think "icebite1" is on the right track. Maybe the cam chain tension-er is on its way out. Probably going to have to open the cam chest. That is assuming the mechanical gauge backs up the factory gauge.
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From: Fla
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Road Master
Joined: Jan 2010
Posts: 922
Likes: 2
From: Hampstead, MD
In the middle of my FM107 kit now and began the process due to LOW oil pressure. You know, told the wife I had low oil pressure and needed to check out the plunger. Which meant new cam plate. Which meant new cams. Which meant new jugs and pistons, cuz there's NO WAY to get those pushrods out without taking the top end off. You get the drift... LOL. Turned out my crank had .020 runout so that had to be replaced also. Then... might as well upgrade the comp and clutch, it's all apart anyway. Oh yeah, and head work too. Only about $3500 into it now. Haha!
Hope it's just your gauge and not a real problem. My first thought is that your bypass valve is stuck. That would be a somewhat easy check. Then again, for me it would turn into a Baisley, then cams, then cam plate, etc, etc, etc.
Hope it's just your gauge and not a real problem. My first thought is that your bypass valve is stuck. That would be a somewhat easy check. Then again, for me it would turn into a Baisley, then cams, then cam plate, etc, etc, etc.
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In the middle of my FM107 kit now and began the process due to LOW oil pressure. You know, told the wife I had low oil pressure and needed to check out the plunger. Which meant new cam plate. Which meant new cams. Which meant new jugs and pistons, cuz there's NO WAY to get those pushrods out without taking the top end off. You get the drift... LOL. Turned out my crank had .020 runout so that had to be replaced also. Then... might as well upgrade the comp and clutch, it's all apart anyway. Oh yeah, and head work too. Only about $3500 into it now. Haha!
Hope it's just your gauge and not a real problem. My first thought is that your bypass valve is stuck. That would be a somewhat easy check. Then again, for me it would turn into a Baisley, then cams, then cam plate, etc, etc, etc.
Hope it's just your gauge and not a real problem. My first thought is that your bypass valve is stuck. That would be a somewhat easy check. Then again, for me it would turn into a Baisley, then cams, then cam plate, etc, etc, etc.
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