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Author Topic:   A Simple Question
Boss Hoss
Gearhead

Posts: 203
From: Georgia
Registered: Mar 2001

posted 10-13-2001 11:44 PM     Click Here to See the Profile for Boss Hoss   Click Here to Email Boss Hoss     Edit/Delete Message   Reply w/Quote

Whenever I start my '65 in the morning, she starts right up (that 289 is a GREAT motor), but the "OIL" light stays on for as long as 2 or 3 seconds AFTER the engine has started running. During this time, I can hear the valves complaining (a dull rattle sound). Then, finally, the oil circulates OK, the valves go quiet, and the "OIL" light goes off.

My oil level is NOT low...I have a full 5 quarts of oil in there. Also, I got a new oil pump when the engine was rebuilt, but that was about 7-8 years ago.

Is this OK? Is this normal? Thanks for any insight you folks can offer.

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*andy* ([email protected])

also known as...***Boss Hoss***

*1965 Mustang 289 coupe*
*1996 Mustang GT coupe*

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Stang28965
Gearhead

Posts: 353
From: Webster New York USA
Registered: Mar 2001

posted 10-14-2001 09:46 AM     Click Here to See the Profile for Stang28965   Click Here to Email Stang28965     Edit/Delete Message   Reply w/Quote
I'd put an oil pressure gauge on and see what it reads at start up. I know on my 65 I have instant oil pressure on start up, the only time I don't have instant is when I change the oil and then start it. So i'd say its not good!

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Boss Hoss
Gearhead

Posts: 203
From: Georgia
Registered: Mar 2001

posted 10-14-2001 11:54 AM     Click Here to See the Profile for Boss Hoss   Click Here to Email Boss Hoss     Edit/Delete Message   Reply w/Quote
Could this thing I'm experiencing indicate a bad or worn-out oil pump?

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*andy* ([email protected])

also known as...***Boss Hoss***

*1965 Mustang 289 coupe*
*1996 Mustang GT coupe*

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Harrys'65
Gearhead

Posts: 306
From: Saint Paul, MN
Registered: Sep 99

posted 10-14-2001 01:54 PM     Click Here to See the Profile for Harrys'65   Click Here to Email Harrys'65     Edit/Delete Message   Reply w/Quote
Sure sounds like a bad pump or clogged filter. I have good pressure on my 289 right at start too.
Hook up the pressure meter,and see what you get. I wouldn't run it too much like that.

Harry

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franklin
Gearhead

Posts: 128
From: VA
Registered: Nov 2000

posted 10-14-2001 03:15 PM     Click Here to See the Profile for franklin     Edit/Delete Message   Reply w/Quote
I would change to a different brand of oil filter and see if it goes away, especially if it's a Fram.

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SteveLaRiviere
Administrator

Posts: 23085
From: Saco, Maine USA
Registered: May 99

posted 10-14-2001 05:10 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Or big oil clearances.

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'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC

Be American, Drive American!

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Boss Hoss
Gearhead

Posts: 203
From: Georgia
Registered: Mar 2001

posted 10-14-2001 11:19 PM     Click Here to See the Profile for Boss Hoss   Click Here to Email Boss Hoss     Edit/Delete Message   Reply w/Quote
For the record, I use Castrol 10W-30 and a Motorcraft FL-1A filter.

Also, it only does this on the FIRST startup of the day. It has instant pressure on every start after that.

I will pull the oil pan and check the pump screen...but right now, I'm messing with putting new bushings in my door hinges and re-hanging the doors! Fun!

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*andy* ([email protected])

also known as...***Boss Hoss***

*1965 Mustang 289 coupe*
*1996 Mustang GT coupe*

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Boss Hoss
Gearhead

Posts: 203
From: Georgia
Registered: Mar 2001

posted 10-16-2001 07:23 AM     Click Here to See the Profile for Boss Hoss   Click Here to Email Boss Hoss     Edit/Delete Message   Reply w/Quote
One thing that has been bothering me...can an oil pump really "wear out"? I know that in some cases, the pump's driveshaft can fail suddenly. I didn't think an oil pump was one of those things that was regularly replaced on an engine. So, can an oil pump gradually get bad, like a tire does? How can I tell for sure?

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*andy* ([email protected])

also known as...***Boss Hoss***

*1965 Mustang 289 coupe*
*1996 Mustang GT coupe*

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franklin
Gearhead

Posts: 128
From: VA
Registered: Nov 2000

posted 10-16-2001 01:45 PM     Click Here to See the Profile for franklin     Edit/Delete Message   Reply w/Quote
The way to tell for sure if you have a serious problem is temporarily install an aftermarket oil pressure guage. The light only comes on I think around 5 lbs or less. The pumps can wear over time, but they usually fail because they suck in a piece of trash which causes damage.
I think I would still try another oil filter-they have anti-drainback valves and bypass valves in them that can leak. It may cost you $4 but it would be something simple to try.

[This message has been edited by franklin (edited 10-16-2001).]

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Boss Hoss
Gearhead

Posts: 203
From: Georgia
Registered: Mar 2001

posted 10-17-2001 05:55 PM     Click Here to See the Profile for Boss Hoss   Click Here to Email Boss Hoss     Edit/Delete Message   Reply w/Quote
Some people have suggested changing my oil filter to one that does not let so much oil seep back down into the pan when the car sits overnight.

I use a Motorcraft FL-1A filter. I have always thought this was a good filter, but now I'm not so sure after hearing some comments.

Is the Motorcraft oil filter a good one? If not, what is a good oil filter to use? What do you all use? I sure would like to hear some opinions about what the best oil filter is, THANKS!

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*andy* ([email protected])

also known as...***Boss Hoss***

*1965 Mustang 289 coupe*
*1996 Mustang GT coupe*

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Stang28965
Gearhead

Posts: 353
From: Webster New York USA
Registered: Mar 2001

posted 10-17-2001 07:06 PM     Click Here to See the Profile for Stang28965   Click Here to Email Stang28965     Edit/Delete Message   Reply w/Quote
Motorcraft makes good filters, But what someone was saying (i think) is that you might have goten a defective one that is leting oil drain back.

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Ken
Gearhead

Posts: 2451
From: Prospect, Ct. M&M Member No. 31 MCA Member 49299
Registered: Jun 99

posted 10-17-2001 07:14 PM     Click Here to See the Profile for Ken   Click Here to Email Ken     Edit/Delete Message   Reply w/Quote
Andy, I'm following this posting very closely !!! Since installing my new engine and running Mobil 1 through a Motorcraft FL-1A filter also (and I've changed it three times already).....my oil light stays on longer than it used too in my old 289ci . Let me know if you remedy the problem and what you did.

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Conciousness - that annoying time between naps.

Ken
1965 Springtime Yellow Coupe
302GT40-4spd
Edlebrock RPM Air Gap
670cfm Holley Street Avenger
and much, much MORE !!!
www.mustangsandmore.com/ubb/Kens.html

[This message has been edited by Ken (edited 10-17-2001).]

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66351stang
Gearhead

Posts: 627
From: sayville,newyork
Registered: Jul 2000

posted 10-17-2001 09:46 PM     Click Here to See the Profile for 66351stang   Click Here to Email 66351stang     Edit/Delete Message   Reply w/Quote
replace the oil sender unit

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ponycar66,have you flown in a ford latley???????
66-COUPE W/351SVO
glad i had a v-8 !!!!!!
84.5 gt350-61 falcon 302
have a great day!!!!!!!!

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Boss Hoss
Gearhead

Posts: 203
From: Georgia
Registered: Mar 2001

posted 10-17-2001 10:14 PM     Click Here to See the Profile for Boss Hoss   Click Here to Email Boss Hoss     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 66351stang:
replace the oil sender unit

66351stang:
The oil sending unit cannot be the problem, because while the "Oil" light stays on, I can definitely hear noise in my cylinder heads where there is not enough oil in the valves yet. As soon as the noise stops, the "Oil" light goes out. There is definitely an oil starvation problem. I'm suspecting the oil pump more and more.

One question for everyone: Is there an oil pressure gauge that I can use under the hood, kind of like those fuel pressure gauges for fuel-injected cars? I don't want to mess with an underdash gauge if I can help it. I would rather use one that is specifically designed for diagnostic purposes, if such a gauge exists. Are there any oil gauges like that?

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*andy* ([email protected])

also known as...***Boss Hoss***

*1965 Mustang 289 coupe*
*1996 Mustang GT coupe*

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franklin
Gearhead

Posts: 128
From: VA
Registered: Nov 2000

posted 10-18-2001 06:41 PM     Click Here to See the Profile for franklin     Edit/Delete Message   Reply w/Quote
There might be guages like that, but just buy one for under the dash, but don't install it permanently. You can hook it up and use it for diagnostic use. Your going to have to unscrew the sending unit on the block no matter how you do it.

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SteveLaRiviere
Administrator

Posts: 23085
From: Saco, Maine USA
Registered: May 99

posted 10-18-2001 08:19 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Sure, you can install a regular mechanical oil pressure gauge under the hood.

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