|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
03-22-2021, 03:19 PM | #1 |
Senior Member
Join Date: May 2010
Location: Meredith, N.H.
Posts: 766
|
low oil pressure ?
When I first start up the truck, I have very strong pressure but after driving a while, it reads close to O. Should I be concerned ? Fresh 15-40 and filter and no leaks.
|
03-22-2021, 03:28 PM | #2 |
Senior Member
Join Date: May 2015
Posts: 8,111
|
Re: low oil pressure ?
For peace of mind, check it with a mechanical gauge or install a known good sender...
__________________
The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
Sponsored Links (Register now to hide all advertisements) |
|
03-22-2021, 03:37 PM | #3 |
Senior Member
Join Date: May 2010
Location: Meredith, N.H.
Posts: 766
|
Re: low oil pressure ?
NOS sending unit
|
03-22-2021, 03:44 PM | #4 |
Senior Member
Join Date: May 2015
Posts: 8,111
|
Re: low oil pressure ?
Did this low pressure problem just start - what's the history?
__________________
The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
03-22-2021, 04:12 PM | #5 |
Senior Member
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,064
|
Re: low oil pressure ?
I'd be concerned - as low oil pressure (if it was an accurate reading) means you are probably starving the bearings - so how long will they last? As noted by others, first put a mechanical gauge on it - just to be sure of your readings.
Tell us what the engine is, how many miles on it, what do you know about the internals, etc.. The more you can give us, the better we can diagnose the problem (hopefully). What are your pressure readings - cold start, warm start. At idle, at RPM on the road, etc.. Did this just start happening - all of a sudden? Did it slowly get worse over a long period of time? Have you changed anything on the oil pressure system - like the installation of a filter that wasn't there before, etc.. |
03-22-2021, 04:19 PM | #6 |
Senior Member
Join Date: May 2010
Location: shirley ny
Posts: 992
|
Re: low oil pressure ?
Sponsored Links (Register now to hide all advertisements)
|
03-22-2021, 04:57 PM | #7 |
Senior Member
Join Date: May 2010
Location: Meredith, N.H.
Posts: 766
|
Re: low oil pressure ?
I will start it up in the AM and pay attention to the readings. I have had the truck for 3 years but not driven it very much as it needed a lot of repair work. Came from Canada. Runs pretty well now but looking at that gauge makes me uncomfortable. I have another question ? The spokes on the steering wheel are vertical and should be horizontal I believe, Is the pitman arm splined or do I need to adjust the drag link to fix the issue ?
|
03-22-2021, 06:28 PM | #8 |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,177
|
Re: low oil pressure ?
Regarding cocked wheel: What year truck? Dad has an ‘49 F1. When he got, similar condition. Turned out both front springs were broken.
Last edited by Tim Ayers; 03-22-2021 at 06:54 PM. |
03-22-2021, 06:42 PM | #9 |
Senior Member
Join Date: May 2010
Location: Alabama
Posts: 3,258
|
Re: low oil pressure ?
Remove the line that feeds the oil filter and screw a plug in the block then see what the pressure does.
|
03-22-2021, 07:18 PM | #10 |
Senior Member
Join Date: Aug 2012
Location: Perth, Western Australia
Posts: 2,687
|
Re: low oil pressure ?
They can read low when well into temperature, the main thing is you see the pressure rise when the rpm goes up.
__________________
"Came too close to dying to stop living now!" |
03-22-2021, 08:25 PM | #11 |
Senior Member
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,627
|
Re: low oil pressure ?
Regarding that steering wheel alignment; you probably need to get that straightened out with drag link adjustment, because the steering box adjustment to take out free play is designed to be made with the steering wheel dead center straight ahead. Check your steering wheel free play with the wheels tracking straight ahead (steering wheel off by 90 degrees) and then compare that to the free play with the steering wheel in the correct horizontal position. Report back what you find.
Regarding low oil pressure; first verify with a mechanical oil pressure gauge. If that verifies low pressure, replace the oil with 50 weight and see if the oil pressure comes up. If so, you can run it that way while you save up for the overhaul. If not, the rods will be knocking in a few hundred miles. |
03-22-2021, 09:20 PM | #12 | |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,177
|
Re: low oil pressure ?
Quote:
|
|
03-22-2021, 10:54 PM | #13 |
Senior Member
Join Date: May 2010
Location: MN
Posts: 7,053
|
Re: low oil pressure ?
I might ask also to Bob, what is very strong pressure at start. If I can.
|
03-23-2021, 11:13 AM | #14 |
Senior Member
Join Date: May 2010
Location: Meredith, N.H.
Posts: 766
|
Re: low oil pressure ?
OK guys, here is a followup. I started cold this AM and show at the red dot on oil pressure gauge between 30 and 80 if that makes sense ? idled for a full twenty minutes for temp to reach normal and watched it go down to just below the dot between 0 and 30. giving a fast idle it goes just above the dot. What do y'all say ? Someone asked for more info, it is a Canadian built Ford 1/2 ton and the engine heads say: C7RA-A, Made in Canada. I asked some time back if it might just have a 4" crank and was told probably not. Appreciate every ones input and am listening !
|
03-23-2021, 11:27 AM | #15 |
Senior Member
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,627
|
Re: low oil pressure ?
Sounds fine. "close to 0" is okay at hot idle. as long as you get some pressure. So, you have oil pressure at idle and the good news is that it moves up with RPM. Drive the wheels off of it, and don't worry. Maybe go to 50 weight oil.
|
03-23-2021, 01:19 PM | #16 |
Senior Member
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,526
|
Re: low oil pressure ?
Ixnay on 50 wt oil.
|
03-23-2021, 04:53 PM | #17 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,312
|
Re: low oil pressure ?
Jack's right again.
|
03-23-2021, 06:30 PM | #18 |
Senior Member
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,064
|
Re: low oil pressure ?
I'd still put a mechanical gauge on it so you can be sure that you have an accurate pressure reading.
|
03-23-2021, 06:46 PM | #19 |
Senior Member
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,627
|
Re: low oil pressure ?
|
03-23-2021, 06:54 PM | #20 |
Senior Member
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,064
|
Re: low oil pressure ?
|
03-23-2021, 10:36 PM | #21 |
Senior Member
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,526
|
Re: low oil pressure ?
That's what I thought.
|
03-24-2021, 11:31 AM | #22 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,571
|
Re: low oil pressure ?
In my youth I had a 50 ford with the 6 in it. Oil ran out about as fast as you could pour it back in. Straight 50wt. helped a lot in that wreck! sorry, off track again
|
Sponsored Links (Register now to hide all advertisements) |
|
03-24-2021, 04:37 PM | #23 |
Senior Member
Join Date: May 2010
Location: Meredith, N.H.
Posts: 766
|
Re: low oil pressure ?
cas3, U made me laugh, my first car was a 1938 C - - - - it had a knee action front end. I started out with hydraulic oil and was all the way to GX 90 and still leaking ! Solved the problem by trading for a 39 Ford two dr.
|
03-24-2021, 05:54 PM | #24 |
Senior Member
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,627
|
Re: low oil pressure ?
My first car was also a C____, 1935. We name our cars. That one was named Pogo, because of worn out knee-action front suspension. Paid $50. for it and sold it a year later for $60, and splurged on an 1935 Ford coupe for $95. That was 61 years ago, and I am still hooked on flathead Fords.
|
03-24-2021, 06:34 PM | #25 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,312
|
Re: low oil pressure ?
I spent part of a miserable summer in 1961 underneath a friend's '38 Chevrolet Master coupe with a hammer and cold chisel removing the "knee-action" so we could install a straight axle for a Standard.
It was worth the effort. |
03-25-2021, 01:48 PM | #26 |
Senior Member
Join Date: May 2010
Location: Meredith, N.H.
Posts: 766
|
Re: low oil pressure ?
Sponsored Links (Register now to hide all advertisements)
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|