15 second oil light on start up.
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- FORDBOYpete
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A Sub Standard or Cheap Oil Filter, lacking the correct residual, anti Back Flow, Valving causes that problem by letting oil drain back and air to enter the system from the top. Every time you restart after sitting, the pump & system has to refill with oil B4 it creates PSI. The lighter the viscosity rating oil used, the more thorough the drainback will be hot, especially with an "I" configuration engine as opposed to a "V" configuration . . . . .
D'ya think Maybe there's a Motorcraft in your future.
FBp
D'ya think Maybe there's a Motorcraft in your future.
FBp
Change is the Only Constant
Sounds like low oil pressure from here, Doc.
That's what I did with the ABS light on our '91 Exploder...works great!
Macon ACE wrote:A guy I used to work for had the same problem with his chebby. He just put a piece of black electrical tape over the oil light. You might try that.
That's what I did with the ABS light on our '91 Exploder...works great!
My "Slickitis" affliction began here...
66 F100 CC/65 F100 CC/66 F250 CC
If it starts to rain, they'll tax the splash.
If you want to fish, they'll tax the bass.
If you plant a yard, they'll tax the grass.
If you don't play nice, they'll fine your *$#!
66 F100 CC/65 F100 CC/66 F250 CC
If it starts to rain, they'll tax the splash.
If you want to fish, they'll tax the bass.
If you plant a yard, they'll tax the grass.
If you don't play nice, they'll fine your *$#!
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15 seconds is an eterninty as far as the oil light being on.
also the light does not come on until pressure is below 8 psi which is very low. i do not hold a lot of trust in the electrical oil pressure units, either the light or gauge.a mechanical gauge provides a much more accurate reading.
i run sae 30 in my y block because there is a noticeable 5-7 psi more than with 10w30, and the consumption is less as well, 10w30 needs an added quart more often than 30w.
also the light does not come on until pressure is below 8 psi which is very low. i do not hold a lot of trust in the electrical oil pressure units, either the light or gauge.a mechanical gauge provides a much more accurate reading.
i run sae 30 in my y block because there is a noticeable 5-7 psi more than with 10w30, and the consumption is less as well, 10w30 needs an added quart more often than 30w.
1966 F250 4x4
1964 Rambler Ambassador 990
Rest in peace departed Slick family members
Cam Milam
Lesley Ferguson
Steve Lopes
John Sutton
1964 Rambler Ambassador 990
Rest in peace departed Slick family members
Cam Milam
Lesley Ferguson
Steve Lopes
John Sutton
Doc
The light coming on at idle is not good. Even if your idle is set way low it should still have enough pressure to keep the light off.
You might have a bad sender but I would suspect worn bearings, pump, or a stuck relief valve.
Since this happened when you switched a lower viscosity oil you might want to go back to a thicker oil.
Myself I would put in a mechanical gauge to check it.
My 300 has 20-25 lbs pressure hot at idle
Not sure but I believe a 240 should be the same on these pressure numbers.
Good luck hope its something simple.
O yea the filter is mounted horizontally on my 300 also
Guess I should add Im useing 15w40 oil in mine
The light coming on at idle is not good. Even if your idle is set way low it should still have enough pressure to keep the light off.
You might have a bad sender but I would suspect worn bearings, pump, or a stuck relief valve.
Since this happened when you switched a lower viscosity oil you might want to go back to a thicker oil.
Myself I would put in a mechanical gauge to check it.
My 300 has 20-25 lbs pressure hot at idle
Not sure but I believe a 240 should be the same on these pressure numbers.
Good luck hope its something simple.
O yea the filter is mounted horizontally on my 300 also
Guess I should add Im useing 15w40 oil in mine
Last edited by Ford4jack on September 23, 2007, 6:57 am, edited 1 time in total.
My old 240 fires right up to 75lb psi and the light goes out when I crank it. If I leave 10w30 in there in the summer, it will get down to perhaps 15 psi at idle, but only after the oil is blazing hot (like 30 miles at 70mph, with 90+ degree heat).
So I run 15w40 in summer and 10w30 in winter. I'd run 5w40 DEO year round, but those oils are synthetic or semisynthetic and I am afraid my slow leaks would become gushers.
Doc, get a good Wix or Baldwin filter. If that don't correct the problem, you better get a mechanical guage and see what's going on.
You have any idea what kind of miles are on that engine?
So I run 15w40 in summer and 10w30 in winter. I'd run 5w40 DEO year round, but those oils are synthetic or semisynthetic and I am afraid my slow leaks would become gushers.
Doc, get a good Wix or Baldwin filter. If that don't correct the problem, you better get a mechanical guage and see what's going on.
You have any idea what kind of miles are on that engine?
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- YukonCor55
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I run 4 qts of 10W40 and 1 qt of Lucas Oil Stabilizer in my ol' 55 with a 272 and my 62 4 x 4 with a 292. It's the best cocktail an old Y block will ever drink! I get good pressure as soon as the key is turned.
SMSgt USAF Retired
1962 Ford F-250 4 X 4, 1955 Ford Fairlane, 1955 Ford Ranch Wagon, 2002 Indian Chief & a couple of old Fender guitars...Life's Good!
"The credit belongs to the man in the arena whose face is marred by dust and sweat and blood...his place shall never be with those cold, timid souls who know neither victory nor defeat." (Theodore Roosevelt)
1962 Ford F-250 4 X 4, 1955 Ford Fairlane, 1955 Ford Ranch Wagon, 2002 Indian Chief & a couple of old Fender guitars...Life's Good!
"The credit belongs to the man in the arena whose face is marred by dust and sweat and blood...his place shall never be with those cold, timid souls who know neither victory nor defeat." (Theodore Roosevelt)
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I've always heard that if you overfill an engine with oil, you run the risk of blowing seals. Never tried it, don't know if it's true.
But, we do know that at startup, you had low oil pressure. After 15 seconds, pressure was sufficient to turn off the light, so, how much pressure do you have now after 15 seconds? Ever hook up a mechanical gauge to actually know what you're dealing with?
But, we do know that at startup, you had low oil pressure. After 15 seconds, pressure was sufficient to turn off the light, so, how much pressure do you have now after 15 seconds? Ever hook up a mechanical gauge to actually know what you're dealing with?
Hope your joking about 16 quarts Doc.
But if overfilling helped it you might want to check out your oil pump pickup tube for a crack or something.
I would imagine there's a gasket or o ring where it bolts to the pump.
That could be a problem area also.(if you really put that much oil in it)
I know overfilling a hydraulic system on some things will find a cracked tube or a bad seal etc on the suction or return side. They will quit sucking air when this is done in some cases.
But if overfilling helped it you might want to check out your oil pump pickup tube for a crack or something.
I would imagine there's a gasket or o ring where it bolts to the pump.
That could be a problem area also.(if you really put that much oil in it)
I know overfilling a hydraulic system on some things will find a cracked tube or a bad seal etc on the suction or return side. They will quit sucking air when this is done in some cases.
- Johnny Canuck
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Heavyhauler wrote:The 460 guys bag on the consumer grade Fram as well.
I bag on them as well, I wouldn't put a Fram on a car bound for the crusher next week.
It kills me when I see someone posts pics of their nice expensive freshly rebuilt engine, that they just sunk a few thousand bucks into & there's a friggin' $3 Fram screwed onto it.
BTW, I'm fairly certain that the same company that makes Frams also makes STP oil filters...along with a plethora of other cheap brands.
Wix, Hastings, Baldwin, Motorcraft & even AC filters are the only ones worth a damn. Maybe even K&N's filters, but I haven't seen one cut apart yet, nor have I seen a report on them.
My "Slickitis" affliction began here...
66 F100 CC/65 F100 CC/66 F250 CC
If it starts to rain, they'll tax the splash.
If you want to fish, they'll tax the bass.
If you plant a yard, they'll tax the grass.
If you don't play nice, they'll fine your *$#!
66 F100 CC/65 F100 CC/66 F250 CC
If it starts to rain, they'll tax the splash.
If you want to fish, they'll tax the bass.
If you plant a yard, they'll tax the grass.
If you don't play nice, they'll fine your *$#!
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- Joined: April 21, 2007, 9:58 am
- Location: Mandurriao, Iloilo City, Philippines