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Old August 26th, 2014, 10:01 PM   #21
ReiKo
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We have had several race motors that have over 100psi of oil... My SBF turbo motor was going to see over 100psi...

Have you changed the oil filter? I have seen multiple times filters making the oil pressure act real funky...
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Old August 26th, 2014, 10:04 PM   #22
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Both motors in my boat and the motor in my f100 always hit around 85-95 psi at startup. I'd let it run and warm up.
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Old August 27th, 2014, 01:40 PM   #23
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Hmmm..... I started it a few times today, but was wary to let it warm up because I have have my front clip off right now, and no electric fan and unsure if I have an accurate engine temp... After a few starts and a few mins of it running, my engine temp gauge didn't even budge (starts at 130 degrees), so I'm not sure if its working figures....

Cold start... oil pressure looks great... 60 psi, I like it
http://vidmg.photobucket.com/albums/...827_130036.mp4

Putting it in gear, raises oil pressure a little but not too much, I'm ok with that
http://vidmg.photobucket.com/albums/...827_130147.mp4

Second start, in park , oil pressure starts to climb, stays around 70-75psi but I shut the motor off because I am uncomfortable not knowing the engine temp. But I would think as a motor warms up, it should drop and not climb.... wtf
http://vidmg.photobucket.com/albums/...827_130608.mp4

*ignore the obnoxious fuel pump*


Last time I ran it, it ran for 3 minutes then I drove it forward and backyard a few times then put it in park and the oil pressure was nearly 80psi at that point and I was worried it would keep rising.

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Old August 27th, 2014, 01:44 PM   #24
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What are the odds of having a bum oil filter if the bypass is stuck in the filter? I've seen this once.
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Old August 27th, 2014, 01:51 PM   #25
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Quote:
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What are the odds of having a bum oil filter if the bypass is stuck in the filter? I've seen this once.
I mean anything is possible. Did an oil change 10-15 start-ups ago and it was fine initially, suppose the filter could be messed up... I'll change the oil tomorrow Bye bye VR1 racing oil
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Old August 27th, 2014, 01:56 PM   #26
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Was it fine before you changed the oil and filter? You don't need to drain the oil, just swap the filter if it's questionable.
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Old August 27th, 2014, 02:03 PM   #27
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Way back 8ish years ago, when the motor was built, and broken in etc, the oil pressure was normal (60 cold, 30-40 warm).

Then it sat for 6 years or so in my barn without being started. Then I started working on it again and changed all of the fluids before the first start up. Its pressure was normal (60 cold, 30-40 warm) initially, then it started to act funny after I got that loose rocker arm and fixed it.
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Old August 27th, 2014, 03:50 PM   #28
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What oil filter is on it now??? Change just the filter and see what it does... A motor will not over heat from running 5 minutes to warm up...

The motor in this car idles for 5 minutes at least with no radiator in the vehicle whatsoever...
http://youtu.be/Wx6clRpo-5A?list=UUC...n27koijFIF4msw
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Old August 27th, 2014, 08:56 PM   #29
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Bridged rockers aren't adjustable, torque to specks and that's it. If your running a high lift cam then your bridged heads "might" need machine work. Buy single rockers & studs.

If you've tightened the (bridged)rockers to specks and start bending push rods after start up, Cha-ching!!! My question/s would be, what kind of cam did you install? lift and duration, etc.

I think you'd do better checking out the amc forum and throwing your questions there.
AMC used to adjust/ regulate the oil pressure by changing the spring inside the oil pump housing. I wish I had your problem. The spring is easy to swap out, take off the nut on the bottom of the oil pump, the spring comes out along with the small piston that reulates your oil pressure.
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Old August 28th, 2014, 10:11 AM   #30
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Originally Posted by jeepers48 View Post
Bridged rockers aren't adjustable, torque to specks and that's it. If your running a high lift cam then your bridged heads "might" need machine work. Buy single rockers & studs.

If you've tightened the (bridged)rockers to specks and start bending push rods after start up, Cha-ching!!! My question/s would be, what kind of cam did you install? lift and duration, etc.

I think you'd do better checking out the amc forum and throwing your questions there.
AMC used to adjust/ regulate the oil pressure by changing the spring inside the oil pump housing. I wish I had your problem. The spring is easy to swap out, take off the nut on the bottom of the oil pump, the spring comes out along with the small piston that reulates your oil pressure.
Thanks, I think I might post up on bulltear

If you read most of my posts - this is a new problem, not a problem that started right after my build. If it was a problem with my heads, I think it would be very apparent shortly after first start up. I have had extensive head work done, and my machinist knew what cam I was using. I don't think my rods are bent, my motor runs awesome.



I think the reason my one set of rockers got loose after I played with them is that I did not torque them down with that piston at top dead center. I just went out to barn one day, took off my valve cover to inspect what was ticking, and tightened the loose rockers to spec in whatever stroke that cylinder was in. The valves might have been slightly/completely open, and just I torqued them down. In theory, they could loose some of their 20ftlb's I torqued them down to once the valve closes again since the tension is decreased, correct?

Then shortly later they started to tick..... Thats why when I re-adjusted them I did lots of research and did it with the motor running.... it has been running fine ever since, no ticks, runs strong, starts right up Just has a extra beefy oil pressure

Oddly enough, the tick I had doesn't worry me that much - I think I know why it happened. The oil pressure does worry me, because that is a change I don't think I can control or that I contributed to.

Last edited by Leanz; August 28th, 2014 at 10:17 AM.
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Old August 28th, 2014, 11:39 AM   #31
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Ok. I think this is getting away from what things effect oil pressure. The head work and rockers are not going to effect oil pressure.

If I were to start checking things, first I would verify the oil pressure gauge. Is it a mechanical? Electrical?

Then, I would pull the pressure bypass spring and plunger off the oil pump. With the spring removed, I would make sure the plunger is freely sliding in and out.
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Old August 28th, 2014, 06:07 PM   #32
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took apart my oil filter adapter today, plunger was stuck! cleaned out some grime in the passages, getting a new gasket, checking my clearances, packing gears with vaseline then putting it back together. Hope that was my issue. If it wasn't, I will inspect the pressure gauge....
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Old August 28th, 2014, 07:29 PM   #33
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Knew it would be something simple.
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Old August 29th, 2014, 03:12 PM   #34
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Quote:
Originally Posted by Leanz View Post
took apart my oil filter adapter today, plunger was stuck! cleaned out some grime in the passages, getting a new gasket, checking my clearances, packing gears with vaseline then putting it back together. Hope that was my issue. If it wasn't, I will inspect the pressure gauge....
Sweet. Good news.
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