|
oil pressure |
Post Reply 
|
| Author | |
fordpower 
Senior Member 
Joined: 02-September-2010 Location: willseyville,ny Status: Offline Points: 1713 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: oil pressurePosted: 26-August-2020 at 9:40AM |
|
does anyone else's 351w only carry 20lbs oil pressure at idle'It has been like this since 2002 32000 miles now has 70000. It goes up to around 50 when driving.
|
|
 |
|
|
californiajohnny
Moderator Group 
Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14467 |
Post Options
Thanks(0)
Quote Reply
Posted: 26-August-2020 at 6:37PM |
|
sounds about right for a stock pump
|
|
|
JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
|
|
|
|
gpd294
Senior Member
Joined: 18-September-2008 Location: Dallas, Texas Status: Offline Points: 2147 |
Post Options
Thanks(0)
Quote Reply
Posted: 27-August-2020 at 4:55AM |
|
I always wondered about this ever since I had my 400 rebuilt. When I first start her up she's got about 80 lbs of pressure until it warms up and then at idle it's around 20 lbs or so.
Glad to hear that it's pretty much normal. Thanks for the information.
 |
|
|
Carlos....1975 Gran Torino Squire Station Wagon restored to look like a 1973 Torino Station
Wagon my Dad bought new from McAnary Ford on June 6, 1973 in Gary,Indiana |
|
|
|
|
fordpower
Senior Member
Joined: 02-September-2010 Location: willseyville,ny Status: Offline Points: 1713 |
Post Options
Thanks(0)
Quote Reply
Posted: 27-August-2020 at 10:10AM |
|
I have been waiting for the knocking for yrs. It has always had blow by since 32000 when I bought it.
On trip to georga dip stick end cracked mad a mess of my new wires etc. It fills bottom of air cleaner on long trips like to ky. |
|
|
|
|
Big Bird
Senior Member
Joined: 25-August-2013 Location: New York Status: Offline Points: 4194 |
Post Options
Thanks(0)
Quote Reply
Posted: 27-August-2020 at 10:28AM |
|
For the blow-by: Make sure the PCV is working, and you might want a catch-can on the PCV line as well.
|
|
|
"What we do in full frontal view, is more honest than your cleaned-up mind."
Randy 1979 T-Bird 2005 F-150 STX RCSB 4.6, 3.55 LSD How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds? |
|
|
|
|
72 RS 351
Senior Member
Joined: 04-September-2014 Location: Knoxville TN Status: Offline Points: 2338 |
Post Options
Thanks(0)
Quote Reply
Posted: 27-August-2020 at 10:55AM |
You can also experiment to find a different PCV which is less restrictive. They vary a lot. I had an 85 Crown Vic(351W P71 model) with lots of blow by, big mess in the air cleaner often. I found a PCV which was better, but it still pushed oil out. I then cheated, I rerouted the PCV system with the PCV on the outer end, full vacuum to one valve cover. That stopped the mess in the air cleaner, and it used about a quart of oil per month(which was only a little more than before that). I don't suggest that unless it's really bad and you are prepared to watch the oil/dipstick often.
|
|
|
Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W 73 Ranchero GT 351C-4V &4R70W for sale later. 92 Lincoln Mark VII SE GTC, OBDII 347/4R70W |
|
|
|
|
Rockatansky
Senior Member
Joined: 30-July-2010 Location: On The Road Status: Offline Points: 5798 |
Post Options
Thanks(0)
Quote Reply
Posted: 27-August-2020 at 11:50AM |
|
fordpower what oil type & weight are you running? and do you drive it year 'round?
|
|
|
72 GT Ute
|
|
|
|
|
fordpower
Senior Member
Joined: 02-September-2010 Location: willseyville,ny Status: Offline Points: 1713 |
Post Options
Thanks(0)
Quote Reply
Posted: 28-August-2020 at 12:59AM |
|
only in summer. since 2018 only about 1000. Oil 10/30 valvoline.
|
|
|
|
|
Rockatansky
Senior Member
Joined: 30-July-2010 Location: On The Road Status: Offline Points: 5798 |
Post Options
Thanks(0)
Quote Reply
Posted: 28-August-2020 at 9:44AM |
|
and you're using an appropriate vintage / hot rod type oil that has sufficient zinc/phosphorus content for flat tappet cams? drain, filter, fill with Rotella 15-40 and see what happens i'd set up a catch can in the pcv line from the valve cover to the intake manifold, and disconnect the tube from the air filter housing. you can either find a breather that fits into the tube or find a breather that fits into the valve cover, or set up a catch can for that line as well time for an overhaul
Edited by Rockatansky - 28-August-2020 at 9:51AM |
|
|
72 GT Ute
|
|
|
|
|
fordpower
Senior Member
Joined: 02-September-2010 Location: willseyville,ny Status: Offline Points: 1713 |
Post Options
Thanks(0)
Quote Reply
Posted: 28-August-2020 at 12:20PM |
|
Ya been that way since I bought it in 02 37000 though 32000.
|
|
|
|
|
72FordGTS
Admin Group 
GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5308 |
Post Options
Thanks(0)
Quote Reply
Posted: 28-August-2020 at 1:04PM |
|
They make Rotella 10W30 too. In northern areas, that might be a better choice than 15W40. The Rotella 10W30 is a bit thicker than a standard 10W30 if you look at the CST at 100 degrees C. FWIW, I have run Rotella 10W30 for years on my flat tappet engines, and never had an issue.
|
|
|
Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
|
|
|
|
72 RS 351
Senior Member
Joined: 04-September-2014 Location: Knoxville TN Status: Offline Points: 2338 |
Post Options
Thanks(0)
Quote Reply
Posted: 28-August-2020 at 3:11PM |
|
What choices are there for oil additives for old cam engines? I'd prefer using modern oils and an additive, I like Amsoil the most. They do make special oils for older engines, but I also like choices that don't require special ordering. I just received an order in two days through the Amsoil site, a case of Severe gear oil. So it isn't really slow, but it isn't as convenient or fast like going to any local store etc.
|
|
|
Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000+ rpm 351-4V &4R70W 73 Ranchero GT 351C-4V &4R70W for sale later. 92 Lincoln Mark VII SE GTC, OBDII 347/4R70W |
|
|
|
|
Big Bird
Senior Member
Joined: 25-August-2013 Location: New York Status: Offline Points: 4194 |
Post Options
Thanks(0)
Quote Reply
Posted: 29-August-2020 at 2:44AM |
|
If I'm reading your post right, you bought the car 18 years ago and only put 5,000 miles on it, the 40+ year old car has only 37,000 miles total. Cars that mostly sit tend to use more oil/have more blow-by than cars that get used regularly. Rings don't seat well, seals tend to get dried out.
|
|
|
"What we do in full frontal view, is more honest than your cleaned-up mind."
Randy 1979 T-Bird 2005 F-150 STX RCSB 4.6, 3.55 LSD How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds? |
|
|
|
|
schufitz
Member 
Joined: 23-February-2014 Location: Hammond IN Status: Offline Points: 101 |
Post Options
Thanks(0)
Quote Reply
Posted: 29-August-2020 at 4:31AM |
 Kind of a tight fit with power steering. Was able to keep dash light using a Scott Drake extender  Edited by schufitz - 29-August-2020 at 4:50AM |
|
|
Dave
1969 Torino GT/351W 2V/FMX/Vinyl Top/Black Jade/Gold Stripes/Nugget Gold Buckets/Console/Racing Mirrors/AC/PS/PDB |
|
|
|
|
Post Reply
|
|
| Tweet |
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options
fordpower wrote: