The Ford Barn

backrodebob · 03-20-2022, 01:12 PM

not knowing much about flatheads and learning as I go, can someone identify this hole in intake manifold? looks like a vacuum source and possibly even a vacuum leak if not being used? and if so best way to seal?

19Fordy · 03-20-2022, 01:31 PM

Could that hole relates to the heat riser? Look here:
https://www.google.com/search?q=flat...wt4-u-8NkL2C1M

Here's some interesting reading.
https://fordbarn.com/forum/showthrea...3993&showall=1

51 MERC-CT · 03-20-2022, 02:29 PM

Poke a wire into the hole to see what path it takes.
If it shows up at the heat riser port, tap a suitable size for a screw to plug it.

Terry,OH · 03-21-2022, 06:25 AM

Sponsored Links (Register now to hide all advertisements)

That hole, if that is truely what it is, is over the exhaust port which brings warm air to the base of the Carb. Most likely for an automatic choke. The brass fitting with the hose connector barb would appear to be manifold vacuum.

03-20-2022, 01:31 PM	#2
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,950	Re: vacuum source? Could that hole relates to the heat riser? Look here: https://www.google.com/search?q=flat...wt4-u-8NkL2C1M Here's some interesting reading. https://fordbarn.com/forum/showthrea...3993&showall=1

03-20-2022, 02:29 PM	#3
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: vacuum source? Poke a wire into the hole to see what path it takes. If it shows up at the heat riser port, tap a suitable size for a screw to plug it. __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

03-21-2022, 06:25 AM	#4
Terry,OH Senior Member Join Date: May 2010 Posts: 4,751	Re: vacuum source? Sponsored Links (Register now to hide all advertisements) That hole, if that is truely what it is, is over the exhaust port which brings warm air to the base of the Carb. Most likely for an automatic choke. The brass fitting with the hose connector barb would appear to be manifold vacuum.