Plugs for extra intake opennings

[47topless]

I am using an 8BA intake on a 59AB and I do not need the openings for the oil filler or the draft tube in the front of the engine. What can I use to plug these two holes? They measure about 1 3/8" D.
Thank you

[tubman]

Originally Posted by 47topless

I am using an 8BA intake on a 59AB and I do not need the openings for the oil filler or the draft tube in the front of the engine. What can I use to plug these two holes? They measure about 1 3/8" D.
Thank you

There's more to this than plugging the holes, as one of these is for the road draft tube, which is an important part of the engine ventilation system. The ventilation system works the exact opposite way for 8BA's than the earlier engines, which further complicates matters. You really need to do some research on crankcase ventilation so you know what is required for the system to work properly. You should probably install a real PCV (positive crankcase ventilation) system to do it right. There is a bunch of information on how to do that right on this forum.

[47topless]

Sorry, I should have provided more detail. I am using an old Sharps intake that will accept my Rochester 4B ('52 Caddie) carb. I am not modifying the ventilation system. This intake will accept my original oil filler tube that has the ventilation filter and cap. There is not a draft tube on this engine.
The Sharps intake has the opening for the rear fuel pump tower and oil filler. I do not need to use the front oil filler or the draft tube holes located on the front of the intake.
I just want to have an idea of how to fill these two un-needed holes. I wonder if the Sharps was designed to be used on an 8BA and the earlier engines as well.
Thank you.

[bobH]

The typical way.... use 'freeze plugs'... the same ones that are used to fill the casting holes on blocks... they come in brass or steel... typically Dorman would be the brand name (although there are other brands). The two-jug manifold on my 8ba has a core plug where the front oil-fill would normally be. It came to me that way.

[petehoovie]

Originally Posted by 47topless

Sorry, I should have provided more detail. I am using an old Sharps intake that will accept my Rochester 4B ('52 Caddie) carb. I am not modifying the ventilation system. This intake will accept my original oil filler tube that has the ventilation filter and cap. There is not a draft tube on this engine.
The Sharps intake has the opening for the rear fuel pump tower and oil filler. I do not need to use the front oil filler or the draft tube holes located on the front of the intake.
I just want to have an idea of how to fill these two un-needed holes. I wonder if the Sharps was designed to be used on an 8BA and the earlier engines as well.
Thank you.

[tubman]

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Originally Posted by 47topless

Sorry, I should have provided more detail. I am using an old Sharps intake that will accept my Rochester 4B ('52 Caddie) carb. I am not modifying the ventilation system. This intake will accept my original oil filler tube that has the ventilation filter and cap. There is not a draft tube on this engine.
The Sharps intake has the opening for the rear fuel pump tower and oil filler. I do not need to use the front oil filler or the draft tube holes located on the front of the intake.
I just want to have an idea of how to fill these two un-needed holes. I wonder if the Sharps was designed to be used on an 8BA and the earlier engines as well.
Thank you.

It sounds like you have everything under control. You would be surprised at how many guys there are out there that do not understand crankcase breathing.

[Gene1949]

For what it's worth,
I have a Edmunds 4-barrel manifold and 4GC similar to your Sharps on a 53 Merc. I would definitely figure out how to run a PCV system.
I would put at least a one-inch spacer between that carb and the intake. World of difference in the drivability and performance.
Very definitely a Chevrolet type distributor using manifold vacuum for the vacuum advance

[19Fordy]

Here's some plugs to consider using.
https://search.yahoo.com/yhs/search?...724_108_250125