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03-22-2017, 12:34 AM | #1 |
Senior Member
Join Date: May 2010
Location: Homelook Sweden
Posts: 178
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Model B engine steam holes ...
Hope you guys can help me find out.
What purpose had Ford when they introduced the steam holes in the Model B engine? I have several model B cylinder head where the steam holes are blocked. Could it have been to be able to also use the model A gasket that was perhaps more readily available here in Sweden, and also be able to use the B head on the Model A engine? Thank you in advance, Jorgen Last edited by 40Pickup; 03-22-2017 at 12:49 AM. |
03-22-2017, 01:46 AM | #2 |
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Join Date: May 2010
Location: Oregon
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Re: Model B engine steam holes ...
An A gasket would also seal the holes so I doubt that is a plausible reason to plug them.
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03-22-2017, 01:58 AM | #3 | |
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Join Date: May 2010
Location: South California
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Re: Model B engine steam holes ...
Quote:
Yeah these holes are blocked in the B block so that the A gasket can be used, also after market made heads were not made with these 'steam' holes. If using the B gasket with holes and , say an after market head without holes...water can possibly have a 'path' thru the gasket holes to start leaks. I plug the four holes down the center of B blocks, that way don't have to be concerned ....except make sure that whatever gasket that you use....that it FITS the head combustion area very well. |
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03-22-2017, 08:37 AM | #4 |
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Join Date: Jul 2010
Location: upstate NY near Mass border
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Re: Model B engine steam holes ...
So, why the holes in the first place?
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03-22-2017, 08:44 AM | #5 |
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Re: Model B engine steam holes ...
The model B block, gasket and head had them. When using a mismatch of parts the Model A head gasket does not cover the holes and coolant can enter the combustion chamber.
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03-22-2017, 09:15 AM | #6 |
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Location: Colorado
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Re: Model B engine steam holes ...
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I am not sure why they are there, but had once heard that they were part of the casting process. Don't know if that is fact or wild guess. |
03-22-2017, 11:30 AM | #7 |
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Join Date: Aug 2010
Posts: 260
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Re: Model B engine steam holes ...
I read somewhere that those holes were used to locate the head in a fixture as part of the machining process.
nick c |
03-22-2017, 12:12 PM | #8 |
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Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,085
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Re: Model B engine steam holes ...
Plug them as hardtimes an vicky say. They need to be flush with the top of the block to support the gasket. If already plugged but are below block-level, fill with epoxy, JB Weld works good, and file or sand to make them flush.
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04-23-2018, 05:42 AM | #9 |
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Join Date: Dec 2015
Posts: 1
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Re: Model B engine steam holes ...
what process did you use to plug the holes in the B block ? If cast iron taper plugs, what size. Im having a major problem with leaks there. There is not enough edge distance on the head gasket to cover the holes adequately. Dean
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04-23-2018, 12:08 PM | #10 |
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Join Date: Jun 2010
Location: Temecula, CA
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Re: Model B engine steam holes ...
I use regular bolts. Tap the block partially, not all the way through, then insert the bolt until it tightens in the hole, cut off the bolt flush or slightly above the block, file until flush. It is best to machine the top of the block after doing the above but can be done by hand if careful.
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