351w oil flow diagram

351w oil flow diagram DEFAULT



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Small Block Oiling System
221/260/289/302/351W/Boss 302
The small-block Ford’s oiling system is fairly conventional across the two engine families, with the
oil pump being driven via the distributor gear and a shaft. A weak spot for these engines is the oil
pump shaft itself. Even if you are building a stock engine, it is  recommended that you use a heavy
duty, aftermarket shaft as an affordable “insurance policy” against failure. Stock shafts have a
history of failure, especially in high performance applications.
289 302 351 Oil Pick Up
This is the
221/260/289/302/351W
oil pump and pick-up.
The Boss 302 has a
different type of oil
pick-up.
The best step you can take in your small-block build-up is the installation of a high-volume oil pump
and a heavy-duty shaft. There are many pumps and manufacturers vary. Federal-Mogul or Melling
high-volume pumps are recommended for your Ford small-block building effort.

With a healthy oil pump and shaft in place, you are ready to tackle the rest of the oiling system. The
221/260/289/ 302/Boss 302/351W family of engines were blessed with a healthy oiling system to
begin with. All you have to do is improve flow by radiusing the oil holes in the crankshaft and block.
This improves oil flow and reduces the risk of cracking. You also want to improve drainback by
radiusing the return holes as well. Other oiling system mods hinge directly on how the engine will be
used. Racing mandates an oil sump that will keep a constant supply of oil available to the oil pump
at all times. Drag racing mandates the use of a deep-sump pan. Road racing calls for a baffled oil
pan that keeps the oil contained around the pump pick-up. In both cases, a windage tray is
recommended to keep oil from getting around the crankshaft.
A 1978-95 FOX-bodied Ford or Mercury calls for a double-sump pan due to the design of the front
chassis crossmember. The front sump (which really isn’t a sump at all) clears the oil pump while the
rear sump serves as the pick-up point. Bear this in mind when you’re building a small-block Ford.

Another important oiling system revision is the installation of screw-in oil gallery plugs as a
substitute for the pressed-in factory plugs. This affords added safety and reliability in the oiling
system. Three retaining screws at the rear camshaft plug add reliability there.
289 302 351 Oil PanBoss 302 Oil Pan with Baffle
The 221/260/289/302/351W oil pan is basically
the same across the board. Some vehicles,
such as the Bronco, have a unique pan and
pick-up.
The Boss 302 oil pan is baffled to keep oil
where it belongs at high revs. This baffling
mandates the use of a special pick-up which
will fit through the opening.
Ford Boss 302 Oil Pump and Pick Up TubeFord Boss 302 Engine Oil Cooler
The Boss 302 oil pump and pick-up. Note the
smaller, round pick-up for use with the baffled
oil pan.
The factory oil cooler available for the Boss
302 is easily adapted to all Ford small-block
engines. This adapter screws into the block
where the oil filter normally goes, with
high-pressure lines routed to the oil cooler
mounted at the radiator support.
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High Performance Ford Engine Parts InterchangeHigh Performance Ford Engine
Parts Interchange
by George Reid
First-ever book about Ford parts interchange
Covers
the entire range of Ford engines from
221-CID to 460-CID
This is one of the best books ever written about Ford engines.
Covering both big- and small-block Ford V-8 engines, this
first-ever book on the subject provides indispensable information
to the Ford enthusiast. Included are high performance factory
parts, interchangeability between Ford Windsor and Cleveland
engines, extensive coverage of the 302 and 351 series as well as
the 352, 390, 406, 427, 428, 429,and 460 big block engines,
factory casting numbers, etc. Read the sample pages from each
chapter to learn more!
Click below to view sample
pages from each chapter
"If you are trying to mix and match cranks and rods, this book
will tell you if it can be done. If you are trying to find the correct
casting number for a Boss 429 distributor, this book will have it
listed. What we really find appealing about the book is that, not
only is it a perfect resource for those interested in factory
correct restorations, but it is equally as useful for the
performance oriented engine builder. Each chapter points out
building tips, such as how to improve a Cleveland's oiling
system, or what heads will yield the best horsepower gains. As
with all SA Design books, this one is filled with pages of detailed
photographs and diagrams. This book will prove to be a
priceless resource, as many of the original Ford V-8 parts
become harder and harder to come by."
-- FORDMUSCLE
webmagazine, February, 2000

Currently Unavailable

Small Block Fords
Chap. 1 - Small Block Ford
Chap. 2 - Cylinder Block
Chap. 3 - Crankshaft & Rods
Chap. 4 - Oiling System
Chap. 5 - Cylinder  Heads
Chap. 6 - Intake System
Chap. 7 - Ignition System
Chap. 8 - Exhaust Manifolds
Chap. 9 - Cooling System
Big Block Fords
Chap. 10 - Big Blocks
Chap. 11- Cylinder Block
Chap. 12 - Crankshaft & Rods
Chap. 13 - Oiling System
Chap. 14 - Cylinder Head
Chap. 15 - Intake System
Chap. 16 - Ignition System
Chap. 17 - Exhaust Manifolds
Chap. 18 - Cooling System
All Ford Engines
Chap. 19 - Gaskets  
Chap. 20 - Engine Math  
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Small Block Chevy Oil Flow Diagram

Small Block Chevy Oil Flow Diagram

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Oiling System Interchange for Small-Block Ford Engines

Oil is the lifeblood of any engine, providing both lubrication and cooling throughout its internal components. The design of the oiling system in Ford V-8s is outstanding, as long as the components are well matched and in good condition. The information that follows will help you achieve these two critical goals.

 

221/260/289/302/ 351W/Boss 302

The small-block Ford’s oiling system is fairly conventional across the two engine families, with the oil pump being driven by the distributor gear and a shaft. The oil-pump shaft itself is a weak spot for these engines. Even if you are building a stock engine, you should use a heavy-duty aftermarket shaft as affordable insurance against failure. Stock shafts have a history of failure, especially in high-performance applications.

The best step you can take in your small-block buildup is to install a highvolume oil pump and a heavy-duty shaft. There are various pumps available from several manufacturers. It is recommended Federal-Mogul or Melling highvolume pumps for your Ford small-block building effort.


bookcoverThis Tech Tip is From the Full Book, HIGH-PERFORMANCE FORD ENGINE PARTS INTERCHANGE. For a comprehensive guide on this entire subject you can visit this link:
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Oiling System Interchange for Small-Block Ford Engines 1

Here’s a typical 221/260/289/302 front sump oil pan, which doesn’t have baffling. The Boss 302 oil pan has baffling around the pickup to keep oil contained. Scott Drake Reproductions makes both the standard pan and Boss 302 pan.

Oiling System Interchange for Small-Block Ford Engines 2

Typical small-block oil sump pickup. Boss 302 pickup is smaller due to windage tray and pan baffling. This pickup does not fit a Boss 302 pan.

With a healthy oil pump and shaft in place, you are ready to tackle the rest of the oiling system. The 221/260/289/ 302/Boss 302/351W family of engines was blessed with a healthy oiling system to begin with. All you have to do is improve flow by radiusing the oil holes in the crankshaft and block. This improves oil flow and reduces the risk of cracking. You also want to improve drainback by radiusing the return holes as well. Other oiling-system mods depend directly on intended engine use. Racing mandates an oil sump that keeps a constant supply of oil available to the oil pump at all times. Drag racing mandates a deep-sump pan. Road racing calls for a baffled oil pan that keeps the oil contained around the pump pickup. I suggest a windage tray in both cases, to keep oil from getting around the crankshaft.

A 1978–1995 Fox body Ford or Mercury calls for a double-sump pan due to the design of the front chassis crossmember. The front sump (which really isn’t a sump at all) clears the oil pump while the rear sump serves as the pickup point. Bear this in mind when you’re building a small-block Ford.

 

Oiling System Interchange for Small-Block Ford Engines 3

Small-block Fords, and virtually all Ford engines after the Y-Block, have a G-rotor oil pump with outer and inner rotors that work collectively to move oil under pressure. This is a selfregulated pump with a control valve. A good practice before installation is to check clearances and control valve for smooth operation. Never install a pump right out of the box.

Oiling System Interchange for Small-Block Ford Engines 4

MCE Engines in Los Angeles, California, blueprints new oil pumps and ships them ready for installation. Always use a heavy-duty oil-pump shaft. The stock shaft is a small-block Ford’s weakest link.

Oiling System Interchange for Small-Block Ford Engines 5

Shelby Cobra T-pans are available as original pieces and as reproductions. They’re fitted with baffles and doors designed to keep oil around the pickup in hard corning. Smaller aftermarket oil pickups (Milodon) work better with this pan than original Ford pieces.

Oiling System Interchange for Small-Block Ford Engines 6

Main-journal restrictor plugs reduce oil flow and pressure to cam journals yielding more oil to main journals. Do not install an oil-restrictor plug at the number-1 main journal.


 

 

Another important oiling system revision is the installation of screw-in oil gallery plugs as a substitute for the pressed-in factory plugs. This affords added safety and reliability in the oiling system. Three retaining screws at the rear camshaft plug add reliability there.

 

351C/351M/400M

The 351C/351M/400M family of engines suffers from inadequate oiling systems, which feed the camshaft bearings and then the main bearings. The result is oil-starved number-4 and -5 main and rod bearings. However, there is a simple solution for this problem. This easy modification involves routing an oil line from the front of the block, where the sending unit screws in, to the back of the block where there is an oilgallery plug. This modification channels a greater volume of oil to the back of the block to feed number-4 and -5 main bearings.

 

Oiling System Interchange for Small-Block Ford Engines 7

Forward oil gallery pressfit plugs should be replaced with screw-in plugs in the interest of oiling-system security. Your machine shop can do this.

Oiling System Interchange for Small-Block Ford Engines 8

Two basic types of oil-filter adaptors are available for small-block Fords: the type shown here, which uses an Allen wrench, and a hex-type that calls for a socket wrench.

Oiling System Interchange for Small-Block Ford Engines 9

Aftermarket windage trays curb oil windage when Boss 302 types are not available. This one is available from MPG Products. It keeps oil from being drawn into the rotating masses at high RPM.

Oiling System Interchange for Small-Block Ford Engines 10

Small-block Fords have gallery access on top, plugged with a Welch plug. MCE Engines in Los Angeles peens this plug for security. Use this galley access for oil-gallery cleaning.

Oiling System Interchange for Small-Block Ford Engines 11

The small-block’s oiling system is straightforward right off the oil filter to main journals, then, cam journals. The only exception to this rule is the 351C, 351M, and 400M where cam journals get oil first, then, main journals.

Oiling System Interchange for Small-Block Ford Engines 12

Fox-body 1979–1995 Mustangs have a dual-sump pan with the oil pickup in the rear. Oil pump is located in the front sump. Each sump has a drain plug. This is an aftermarket Canton oil pan with baffles to keep oil around the pickup in hard cornering.

Aside from the external oil line, the 351C/351M/400M engines receive all of the internal oiling system mods mentioned earlier. A good rule with these engines is to increase oil volume and match oil pressure to the RPM expected. You need 10 psi for every 1,000 rpm expected. If you are expecting 7,000 rpm, you need an oiling system that makes a maximum of 70 psi.

Written by George Reid and Republished with Permission of CarTech Inc

 

 

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Flow diagram oil 351w

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How oil circulates around an engine when started

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