TheSamba.com :: View topic - Cap for Pre-Heat hose hole

Tue Sep 02, 2025 6:35 am

My 64 has one pre-heat hose coming from the stock oil bath air cleaner. My breast plate tin has two pre-heat tube holes. I think the vacant hole should be plugged. Agree? Any tricks to block the hole that will look professional?

Tue Sep 02, 2025 7:48 am

https://www.digikey.com/en/products/detail/keystone-electronics/7606/316760

I use steel hole plugs. Made in many diameters. The one shown above is not nessecarily the correct diameter. Many hardware stores carry these. Can be painted black.

Tue Sep 02, 2025 8:42 am

That looks like a great solution. Thank you.

Tue Sep 02, 2025 8:48 am

I found a plug like 0-2-50 posted above at, Ace Hardware a few years back.
Maybe take a look there before ordering online.

Tue Sep 02, 2025 9:04 am

dhoulf wrote: My 64 has one pre-heat hose coming from the stock oil bath air cleaner. My breast plate tin has two pre-heat tube holes. I think the vacant hole should be plugged. Agree? Any tricks to block the hole that will look professional?

Sounds like you have a 1967 type 1 rear tin piece. Two tin can lids with a bolt & nut thru a center hole in the lids will work to clamp over/under the hole to block it off.

ANY hole in the tins or seals that you can see down below the engine allows hot air that already has cooled the engine, to get back into the engine compartment to go thru the engine again. So not best for cooling the engine.

Do feel free to post images of the engine, so all here can point out any other problems you have.

Tue Sep 02, 2025 9:47 am

A couple of large fender washers, and a short bolt & nut to sandwich it together in place is what i did for mine.

Tue Sep 02, 2025 9:51 am

The last 2 suggestions are about the easiest or you can cut a slightly larger piece of sheet metal and screw or rivet it in.