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Author
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Topic: A Simple Question
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Boss Hoss
Gearhead Posts: 203
From: Georgia
Registered: Mar 2001
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posted 10-13-2001 11:44 PM
   
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.  ------------------
*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
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posted 10-14-2001 09:46 AM
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
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posted 10-14-2001 11:54 AM
Could this thing I'm experiencing indicate a bad or worn-out oil pump?------------------
*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
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posted 10-14-2001 01:54 PM
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
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posted 10-14-2001 03:15 PM
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
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posted 10-14-2001 05:10 PM
Or big oil clearances. ------------------
'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
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posted 10-14-2001 11:19 PM
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! ------------------
*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
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posted 10-16-2001 07:23 AM
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?------------------
*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
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posted 10-16-2001 01:45 PM
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
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posted 10-17-2001 05:55 PM
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!  ------------------
*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
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posted 10-17-2001 07:06 PM
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
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posted 10-17-2001 07:14 PM
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.------------------
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
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posted 10-17-2001 09:46 PM
replace the oil sender unit ------------------
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
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posted 10-17-2001 10:14 PM
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?
------------------
*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
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posted 10-18-2001 06:41 PM
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
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posted 10-18-2001 08:19 PM
Sure, you can install a regular mechanical oil pressure gauge under the hood.
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