Mode "B" cylinder head

john charlton

john charlton

Well-known member
This is the head with the "C" cast on it so no confusion with the "B" cast on the higher compression "police head " This "C" head is fairly common in England as the Dagenham fully counterweighted engine was built through WW2 and after . This head when fitted to an "A" engine gives higher compression and a bit more ooomph . The "B" head gasket is easily available here NOS and is the one to use when fitting the "C" head to an " A" engine . The question is if a regular "A" gasket is fitted will it leak as the gasket barely covers the two steam holes next to the centre stud hole Just curious about USA experience .

John in sunny Suffolk County England .
 
Vince Falter covers this subject on this webpage and other info of interest.

https://www.fordgarage.com/pages/ABcylinderheadgasketguide.htm


Important Note:

Most Model A head gasket profiles do not properly cover the two center 'steam' holes (actually manufacturing 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 and causing engine overheating!

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


Also something I did not know about the BF engine heads using a special gasket:

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 not perpendicular to the deck, unlike all other Model A and B engine types. The valve heads are positioned closer to the small three-inch cylinder bores, and the guide bores are angled towards the cylinder. The valve guide bores are not parallel to the cylinder bores, nor square to the block surface. The Model BF valve design and layout was a variation of the flathead V8 valve layout design.


"B" head is 5.22 to 1

"C" head is only 4.6 to 1.


When I started using "The head with the large B" in 1963 I was told by Bill Kenz and Rumble Seat to use the correct gasket as Vince states on this webpage. No leaks ever.
 
Last edited:
Benson said:
Vince Falter covers this subject on this webpage and other info of interest.


Important Note:

Most Model A head gasket profiles do not properly cover the two center 'steam' holes (actually manufacturing 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 and causing engine overheating!

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


Also something I did not know about the BF engine heads using a special gasket:

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 not perpendicular to the deck, unlike all other Model A and B engine types. The valve heads are positioned closer to the small three-inch cylinder bores, and the guide bores are angled towards the cylinder. The valve guide bores are not parallel to the cylinder bores, nor square to the block surface. The Model BF valve design and layout was a variation of the flathead V8 valve layout design.


"B" head is 5.22 to 1

"C" head is only 4.6 to 1.


When I started using "The head with the large B" in 1963 I was told by Bill Kenz and Rumble Seat to use the correct gasket as Vince states on this webpage. No leaks ever.
Click to expand...

Thank you :D
 
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