Low Oil Pressure ?? - Off-Road Forums & Discussion Groups
Ford 67-96 F-Series, 78-96 Bronco All discussions of 67-96 F-Series Trucks and 78-96 Broncos

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 08-12-2004, 10:47 PM
Posts: n/a
Low Oil Pressure ??

I have an '84 F150 with a 300 cu. in.,6 cylinder.My problem is I first start it it has good Oil Pressure.Let it warm up it drops off way Low.Still runs smooth,just Low pressure.

Been running like this for short periods for two years.Would it be weak Oil Pump ?

Sponsored Links
post #2 of (permalink) Old 08-13-2004, 09:25 AM
Join Date: Mar 2001
Posts: 2,074
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Low Oil Pressure ??

Sounds like aging rings, bearings and pump. Things are tight when it is a cold block but when it warms up it gets a bit loose. Try using 20W50 and keep it changed. Do not flush the engine you could make it worse...
havack is offline  
post #3 of (permalink) Old 08-15-2004, 05:25 PM
Join Date: Feb 2004
Posts: 373
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Low Oil Pressure ??

Are you going by the factory guage or a mechanical gauge? If the factory guage is showing low I would spend $10 on a cheap aftermarket mechanical guage to see how low it actualy is. I've had several old trucks that ran really low pressure at idle ie 4/10 psi but ran about 20psi at highway speeds. Might be a good idea to just drop the oil pan and put a new pump in. Not very hard to do. Alot of times the problem is crud in the pickup screen not the actual pump itself. However if you have it apart its worth investing in a new pump. I highly recomend the fel-pro ulta-seal oil pan set for a 300. It comes with these neat plastic pegs you screw into the block that hold the gasket in position till you mount the pan. I saved mine and have used them on several other projects. New pump and pan gasket probably would only run $30 or so maybe less.
Jacob_Royer is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome