Skip to main content ↑ ↓
Topic: oil pressure drops (Read 798 times) previous topic - next topic

oil pressure drops

Sorry I dont have alot of info as the car isnt here and I am only relaying what I was told. It a 302 in a 80 Bird abd after about an hour of driving, which it runs fine, the oil pressure drops and of course the rattling begins. Any thoughts?

oil pressure drops

Reply #1 –
main bearing?
mine drops from 50 lbs to about 0 in 40 min.
then the clunking starts
[SIGPIC][/SIGPIC]
***** Project "EVOLUTION" 1987 Cougar LS  & 1985 Cougar Convertible *****
[/COLOR]
5.0 HO 306 roller block, machined GT-40P heads, Wiseco dished forged pistons, Eagle forged floating I-beam connecting rods, Lunati pushrods, ARP bolts, Scorpion aluminum 1.6 rockers, Comp Cams Magnum 266HR, Explorer intake, 65mm TB, MAF Conversion, 19# injectors, Ford Racing stainless P-headers, 2-1/2" cat-less exhaust w/ Flowtech Afterburner lers , SC AOD with 2800 BDR torque converter, 3.73 T-Lok rear, CHE rear control arms, full 2-1/2" frame w/1" jacking rails & seat supports, Rear disk brakes, Turbine wheels, All original interior w/ floor shift upgrade .......
Pretty much every panel on my 87 is new, rebuilt, or re constructed. :D
Join us on Facebook
http://www.facebook.com/home.php?sk=group_137541156293768&ap=1

oil pressure drops

Reply #2 –
Main bearings would be my guess as well - they're so sloppy the oil pump can't keep up with the oil being thrown off the crank when it's hot (and thin). Try an oil change with a heavier oil (20W50 or so). It won't repair the problem but it might buy some time...
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

oil pressure drops

Reply #3 –
it could be the pick up tube screen is clogging up. if the plastic cam gear goes south all that plastic goes into the pan. the reason i say this is if it were bearings it would start to rattle as soon as it is warmed up. where if it is the tube plugging up it happens after a while of driving. sorry but my guess is that the oil pan needs to be pulled and cleaned out. and also you might as well put a pump and tube in while you're there.
louie  :birdsmily:
[SIGPIC][/SIGPIC]       
My famous last words:
It seemed like a good idea at the time.        88TC R.I.P.      88 Sport build in progress
 

oil pressure drops

Reply #4 –
Quote from: dudeman351
my guess is that the oil pan needs to be pulled and cleaned out.

Which is one helluva job with these cars.
-Jim
1987 Cougar LS 5.0