Model A & B

Ford Garage

Cylinder Head Gasket Guide

Model A Ford cylinder head gaskets were originally supplied by Victor and McCord, as well as produced by the Ford Motor Company. They were originally produced in both copper and brass.

All original Model A head gaskets were a sandwich construction of copper or brass with a white asbestos filler. They were all stamped with the Ford script, as well as the manufacturer's mark and gasket number.

In 1932, Detroit Gasket and Mfg. Co. was added to the supplier list, producing the Model B head gasket using their 'steelbestos' construction of steel-reinforced grey asbestos with crimped steel fire rings, and having no metal sandwich. These gaskets were also stamped with the Ford script, and sometimes also with 'Made in USA'.

In addition to Ford authorized gaskets, a variety of aftermarket suppliers produced head gaskets for Model A and B Ford engines.


There are three important considerations when selecting the proper head gasket.

  1. The gasket profile must properly match the combustion chamber of the cylinder head. The hem or fire rings cannot extend into the chamber. An exposed edge of the gasket hanging into the chamber will result in a burned gasket and likely failure. This is especially important to check when using aftermarket heads having non-stock combustion chamber shapes.

  2. The gasket bore size after installation must exceed the cylinder bore size to prevent piston contact. This is especially important to check when using blocks which have large overbores.

  3. When used with either a Model B head or Model B cylinder block, it is important to confirm that the selected gasket will properly cover and seal the two 1/4" 'steam' holes on either side of the center stud location, in order to prevent water leakage into the cylinder and exhaust leakage into the coolant and overheating.

Summarized below are head gasket brands, numbers, construction, and gasket bore sizes for a variety of gaskets produced from 1928 through the 1970's, as well as a few more recent examples.

This is the most comprehensive data ever presented on the internet relating to Model A and B Ford head gasket interchange. The data is based on numerous vintage gasket manufacturer catalogs, as well as the many varieties and variations of NOS and new head gaskets in my (130+ piece) collection.


Model A Cylinder Head Gaskets:

Model A Ford head gaskets below were used on 1928-31 Model A Ford engines. In addition, they were used on Gleaner Baldwin combines which were powered by Model A Ford engines, including the 1930-35 Model R-A, the 1936-38 Model NA and NR, and the 1939-43 Model E, F, 9H, and 9J combines.

Model A Cylinder Head Gaskets:

Brand Part Number Gasket
Bore
Construction
Ford A-6051-A 3-15/16 Copper, white asbestos core, Ford script
Ford A-6051-A 3-15/16 Brass, white asbestos core, Ford script
McCord 5559 3-15/16 Copper, white asbestos core, hemmed edge, Ford script,
Replaced by 5571
McCord 5571 4 Copper, white asbestos core,
Good for large oversize bore
Victor 800-C 3-61/64 Copper, white asbestos core
Victor 800 C1 3-61/64 Copper, white asbestos core
Victor 800-D 3-61/64 Brass, white asbestos core
Victor 800-S C1 3-61/64 Steel, white asbestos core
Victor 800-R Steel one-sided, white asbestos core, hemmed, 'Metalbac'
Fitzgerald 1000DC 3-15/16 Copper, white asbestos core
Fitzgerald 1000 4 Steel, white asbestos core,
Good for large oversize bore
Fitzgerald 1000L 4 Steel, white asbestos core,
Good for large oversize bore
Wizard RR6081 4 Fitzgerald 1000, steel, white asbestos core,
Good for large oversize bore
Stamco 2028-S Steel, tin plated, white asbestos core
Fel-Pro 7013
Steel
3-61/64 Steel, tin plated, white asbestos core
Fel-Pro 7013
Copper
3-61/64 Copper, white asbestos core
Fel-Pro 7013 R1 3-61/64 Copper, grey asbestos & steel core
Fel-Pro 7013 R2 4-1/16 Copper, grey asbestos & steel core,
Big bore, siamese blow outs are common,
Only recommended for very large oversize bore.
Recommended by Brumfield for his heads.
Fel-Pro 7013 R3 4-1/16 Copper, grey asbestos & steel core,
Big bore, siamese blow outs are common,
Only recommended for very large oversize bore.
Recommended by Brumfield for his heads.
Fel-Pro 7013 R4 Recommended by Brumfield for his heads.
Best 509C 4-1/32 Copper, white asbestos core, marked 'Made in England'
Best 509C 4 Copper, white asbestos core, 'Made in USA',
Clears larger size valves,
Minimal water jacket to combustion sealing on right hand side
Best 509G 4 GraphTite & steel, steel fire rings, 'Made in USA',
Clears larger size valves,
Minimal water jacket to combustion sealing on right hand side
Snyders A-6051-M Grey asbestos & steel, steel fire rings,
silicone bead water seal,
Not Recommended

Model A High Compression Cylinder Head (Police) Gaskets:

The characteristic distinction of the cylinder head gasket for the Model A Ford high compression police head (marked with a large letter 'B') is the revised combustion chamber opening shape closely following the valves to fit the 5.2 : 1 high compression ratio A-6050-B cylinder head.

Brand Part Number Gasket
Bore
Construction
Ford A-6051-B Copper, white asbestos core
Victor 850 Copper, white asbestos core
Fitzgerald 1156 3-63/64 Copper, white asbestos core

Model B Cylinder Head Gaskets:

The characteristic distinction of the Model B Ford cylinder head gasket is the revised combustion chamber opening shape around the valves and the addition of two 1/4" 'steam' holes next to the center head stud, matching the 'steam' holes in the Model B cylinder head and the Model B engine block.

The Model B style head gaskets are also suitable for use on the 1948-54 Claas Mähdrescher combines produced in Germany using the Köln G28T engine.

When using either a Model B cylinder head (marked with a large letter 'C') or a Model B block (having a RH side fuel pump boss), it is important to use a Model B head gasket which properly seals the two center steam hole openings.

Important Note:

Most Model A head gasket profiles do not properly cover the two center steam holes in the Model B head and block, and are unable to effectively seal those holes.

The use of a Model A gasket profile with a Model B head and/or Model B block often results in water leaking into the cylinders, and/or exhaust gas leaking into the coolant!

Check for water in the (milky) oil, and foaming coolant or bubbles in the radiator!

Model B Cylinder Head Gaskets:

Brand Part Number Gasket
Bore
Construction
Ford B-6051 3-15/16 Detroit Gasket 'steelbestos', grey asbestos & steel core,
steel fire rings, Ford script, Made in USA
Ford BG-6051 Köln Germany head gasket originally for 7.0 : 1 CR,
Gas Compressor (wood gas) conversion on Model B block,
Optional with standard B gasket
Ford G087TG-6051 Köln Germany head gasket originally for 8.5 : 1 CR,
Gas Compressor (wood gas) conversion on G28T block
Victor 900 C1 3-63/64 Copper, white asbestos core, stamped large outline "C",
Correct original Model B combustion chamber shape
Victor 900-R C2 3-15/16 Steel one-sided, white asbestos core,
hemmed, 'Metalbac' style,
Correct original Model B combustion chamber shape
Victor 900 4 Copper, white asbestos core,
Good for large oversize bore
Victor 900 C2 4 Copper, white asbestos core,
Good for large oversize bore
McCord 5737
Copper
4-1/32 Copper, white asbestos core,
Good for large oversize bore
McCord 5737
Steel
4-1/32 Steel, white asbestos core,
Good for large oversize bore
Fitzgerald 1300DC 3-63/64 Copper, white asbestos core
Fitzgerald 1300 4-1/64 Steel, white asbestos core,
'Aluma-fused steel oxide' style,
Good for large oversize bore
Fel-Pro 7014 3-15/16 Grey asbestos & steel core, steel fire rings
Fel-Pro 7014 R1 4 Grey asbestos & steel core, steel fire rings,
Good for large oversize bore
Excelsior 530 Copper, white asbestos core, (Made in France),
Correct original Model B combustion chamber shape
Best 573C 3-15/16 Copper, white asbestos core, marked 'Made in England',
Correct original Model B combustion chamber shape
Best 573C 4 Copper, white asbestos core, 'Made in USA',
Incorrect (Model A) combustion chamber shape,
Clears larger size valves,
Minimal water jacket to combustion sealing on right hand side
Best 573G 4 GraphTite & steel, steel fire rings, Made in USA,
Incorrect (Model A) combustion chamber shape,
Clears larger size valves,
Minimal water jacket to combustion sealing on right hand side
Snyders B-6051-M 4 Grey asbestos & steel, steel fire rings,
silicone bead water seal,
Not Recommended

Overhead Valve (Miller-Schofield, Cragar, Morton & Brett, Alexander, McDowell, etc.) Cylinder Head Gaskets:

The characteristic distinction of an Overhead Valve cylinder head gasket for the Model A and B Ford is the round combustion chamber opening shape and absence of valve clearance. The Overhead Valve head has all the valves in the head, operated by push rods through the gasket holes.

Brand Part Number Gasket
Bore
Construction
Victor 1225 C2 3-61/64 Steel & copper, white asbestos core,
Morton & Brett, Miller
Victor 1409 4-1/16 Copper, white asbestos core,
Morton & Brett
McCord 5621 Copper, white asbestos core,
Morton & Brett, Miller
Fitzgerald 1084M 3-15/16 Copper, white asbestos core,
Morton & Brett
Fitzgerald 0261 4-1/16 Steel, white asbestos core

F Head (Riley, Roof Cyclone, etc.) Cylinder Head Gaskets:

The characteristic distinction of an F Head cylinder head gasket for the Model A and B Ford is the combustion chamber opening shape around the valves. The F Head has the intake valves in the head, and the exhaust valves in the block.

When using a Model B block, it is important to note if the head gasket properly aligns with and seals the two 1/4" 'steam' holes next to the center head stud in the block.

Brand Part Number Gasket
Bore
Construction
Victor 1400 Copper, white asbestos core,
Riley
McCord 5929 Copper, white asbestos core,
Riley
Fitzgerald 1125 R. & R., Grant, Roof Cyclone, Riley 2 port
Fitzgerald 1445M 4 Steel & copper, white asbestos core,
Large valve opening, Riley 4 port
Fitzgerald ? 4-3/32 Steel, white asbestos core
Best Yapp 4 GraphTite & steel, steel fire rings, Made in USA

British Model AF and BF Small Bore Cylinder Head Gaskets:

The characteristic distinctions of the British Model AF and BF Ford small-bore cylinder head gaskets are the 3" bore size and the combustion chamber opening shape around the valves and water jackets. The following illustration and pics show an AF gasket and a BF gasket.


The Model AF head gasket will only properly fit a Model AF block and head.

Ford
Model
Brand Part Number Gasket
Bore
Construction
AF Ford AF-6051 Copper, white asbestos core
AF Victor 725 C2 3-1/8 Copper, white asbestos core
AF McCord 5458C Copper, white asbestos core

The 1932-35 Model BF head gasket will only fit a Model BF block and head. The valves and guide bores in the BF block are angled towards, and are closer to the cylinder bores. The valves are not perpendicular to the deck like other Model A and B type engines.

The water jacket openings on the right hand side of the Model BF engine are also substantially larger than those of a Model A, AF, or B engine block and head. This is evident along the bottom of the gasket in the pic below when comparing the gasket to other Model A and B gaskets.

Ford
Model
Brand Part Number Gasket
Bore
Construction
BF Ford BF-6051 Copper, white asbestos core
BF Payen 1420 3-3/16 Copper, white asbestos core
BF ? ? Grey asbestos & steel core, steel fire rings

German Model G28T Air Compressor Cylinder Head Gaskets:

The characteristic distinctions of the German Model B and G28T Ford air compressor cylinder head gaskets are the size and the shape of the cylinder openings around two pair of adjacent cylinders.

The two rear cylinders are used for pumping air, and their gasket openings are shaped for the compressor reed valving. The two front cylinders are used for engine operation and their gasket openings are conventionally shaped for the poppet valves.

See (this link) on Ford Garage for an actual German G28T air compressor engine which would use this type of cylinder head gasket.

Ford
Model
Brand Part Number Gasket
Bore
Construction
G28T Goetze 8114 Steel, asbestos core?

More related information on Ford Garage:

  1. Model A Original Head Gasket Details
  2. Model A & B Fel-Pro 7013 Cylinder Head Gaskets
  3. Model A Brumfield Cylinder Head and Gaskets
  4. Model A & B Cylinder Head Flatness Requirements by Larry Brumfield
  5. Model A & B Cylinder Head Gasket Installation Instructions by Larry Brumfield
  6. Model A & B Cylinder Head Nut Tightening Sequence
  7. Model A & B Snap-On Cylinder Head Nut Wrench proper torque application tool
  8. Model A & B Cylinder Head Stud Removal Tools
  9. Model A & B Broken Cylinder Head Stud and Bolt Removal
  10. Model A & B Cast Iron Cylinder Head Variations and Compression Ratios
  11. Model A & B Cylinder Head Comparison

July 2006