Model C head on a Model A block
 

Does anyone have a Model C head on their Model A block?
I refering to the Model B head that has the 'C' on it.

What needs to be done to a Model C head to run it on a Model A block?
I heard that they may be a couple of water port holes that should be welded up?

What type of gasket is used?

Did you notice any increase in horse power?

Thanks, Neil

Re: Model C head on a Model A block
 

neil , I had one awhile back . seems it was like 5.2 or 5.4 compression . less than the police head . I got it in a trade & sold it ......... steve

Re: Model C head on a Model A block
 

I think you need to install set screws or pipe plugs in the two steam holes in
the center of the head. Vince's has a little info on his site http://www.fordgarage.com/pages/ABcy...comparison.htm

Bob

Re: Model C head on a Model A block
 

Water pump modifications are required for a B head.

I was very fortunate to have an excellent professional vintage mechanic teacher years ago who proclaimed three (3) Cardinal Head Rules that one should:

1. Never exceed 55 foot pounds head bolt torque ........ even with a Police Heads; &,

2. Never remove engine heads while engine is hot or even warm; &,

3. Always loosen & tighten head bolts gradually in proper sequence.

Hence always kept flat heads dead flat.

Never did anything to extra B holes in B heads or B engines, or B heads on A engines, or holes in B head gaskets, because I always had dead flat A heads on dead flat B engines, and/or dead flat B heads on dead flat A engines & used either an A or B head gasket, (whichever I had on hand), on any combination.

Always applied No, 2 Permatex non-hardening gasket sealer back then prior to modern silicone head gaskets.

Hope this helps.

Re: Model C head on a Model A block
 

I had to paint my car Washington Blue to get the '32 'C' head to fit properly. It cost a lot - but the new 'C' head sure makes my car look a lot better !

Re: Model C head on a Model A block
 

What water pump modifications are required for a B head other than using a B water pump on the 1932 head and a standard A pump on the police head?

Charlie Stephens

Re: Model C head on a Model A block
 

no! A head on B block yes.

Re: Model C head on a Model A block
 

Neil,

The problem with the the water holes goes away when you use the 1932-34 gasket with the 1932-34 head. The problem occurs when you run a 1932-34 block and a Model A head. The holes are too close to the edge of the gasket and will leak coolant into the combustion area.

Charlie Stephens

Re: Model C head on a Model A block
 

They're only like a 4.7 compression ratio. Very slightly higher than a stock A.

Re: Model C head on a Model A block
 

Hi Charlie,
I'm confused.
If I use a Model B head (C on it) and a Model B gasket on my Model A block, wouldn't the water holes on the B head line up with the water holes on ther B gasket and then allow the water onto the A block? Did you mean to say use a Model A gasket?

Re: Model C head on a Model A block
 

Hi Neil,

A. While not being fully informed about all of the different Model A Religions, again per reply #4, I've many times used:

1. A Model A "Police Head" marked "B", on a B engine with no leaks, in conjunction with either providing a Model A head gasket or a Model B head gasket, sealed with Permatex No. 2; and,

2. A Model A "Police Head" marked "B" on a Model A engine with no leaks, in conjunction with either providing a Model A head gasket or a Model B head gasket, sealed with Permatex No. 2; and,

3. A Model B head marked "C" on a Model A engine with no leaks, in conjunction with either providing a Model A head gasket or a Model B head gasket, sealed with Permatex No. 2.

B. A Model B head has (3) water pump mounting holes in lieu of the (4) water pump mounting holes provided in a Model A head; hence, a Model B head requires a Model B water pump with three (3) mounting holes & a Model B water pump gasket with (3) holes.

C. In my humble experiences, with both head & block maintained "dead flat", coupled with proper sequence tightening of head nuts, & always using vintage Model T era Permatex No 2 gasket sealer on all four (4) mating surfaces, I never experienced head or head gasket leaks around the two (2) extra small holes & never plugged these holes.

D. Furthermore, with either cooling system, whether Model A or Model B, coolant is circulating with such a low pressure type pump that it does not create much internal engine water pressure & very little water head pressure -- if circulating coolant did have the water head pressure of domestic water at one's hose bibb, one could remove a Model A radiator cap & observe radiator water flying over the neighbor's roof.

E. Just one guys multiple experiences.

Re: Model C head on a Model A block
 

Thank you everyone.
My plan is to install new head studs, a Model B head with the 'C' on it, with the 3 hole Model B water pump. I intend to use one of the new silicone head gaskets.

Re: Model C head on a Model A block
 

Neil I run the C head on my A block just used a B gasket no problems rember you will need two front head bolts replaced with short ones good luck and have a blessed day