The Ford Barn

rivcokid · 05-11-2022, 04:49 PM

Hi all - Any guesses as to why someone would install a fitting onto the intake manifold that would allow you to unscrew part of it to open a hole in the manifold? I'm trying to get a friend's 1928 roadster pickup to start. It cranks well but never turned over until I removed the top of the fitting. It started once and ran very fitfully for about 10 seconds, then back to not starting.

There are other issues with it, but I'm trying to understand the intake manifold hole. Thanks in advance.

The Master Cylinder · 05-11-2022, 04:54 PM

Picture??

burner31 · 05-11-2022, 05:04 PM

Sounds like the vacuum port for the wipers

rivcokid · 05-11-2022, 05:05 PM

Hmmm. I might be but there are no wipers connected. Sorry, I didn't take a pic.

Chuck Dempsey · 05-11-2022, 05:47 PM

If you have a steel tube running under the very right side of the gas tank, or even the fittings designed to hold that tube, it came with a vacuum wiper...

Oldgearz · 05-11-2022, 06:46 PM

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The outlet for the vacuum wiper is 3" above the carb/manifold flange and faces outward directly toward the fender. I also have a fitting above that which is on the top of the manifold. I imagined it was for either measuring vacuum or to open and squirt in some starting fluid.

ponymare · 05-11-2022, 06:57 PM

Could be it was put there to ad one of those ole wolf whistles.

nkaminar · 05-11-2022, 08:22 PM

Or it could be that a manifold off a car with a vacuum windshield wiper was put on this car that has an electric windshield wiper.

To start your friend's car, I assume you have checked all the usual stuff. Spark, timing, compression, fuel, etc. Opening the hole in the manifold would have nothing to do with the car starting but would make it run lean and not idle.

old ugly · 05-11-2022, 09:25 PM

i have had other car engines that the intake manifold has had a fitting installed for priming.

Richard in Anaheim CA · 05-11-2022, 11:51 PM

28's had no vacuum port in the intake manifold.

29 and later had a vacuum port in the manifold which has a round boss around the hole.

Many of the manifolds without a hole in the manifold were drilled later by owners or mechanics and would not have the round boss around the hole.

Richard
Anaheim CA

rivcokid · 05-12-2022, 03:48 PM

Thanks everyone. I'll be back at it on Sunday (after rebuilding the carb) and will see how it goes. There's no hint of a steel tube for vacuum purposes. Will keep playing with it!

05-11-2022, 04:49 PM	#1
rivcokid Senior Member Join Date: Sep 2018 Location: Riverside, CA Posts: 174	Hole in intake manifold - on purpose! Hi all - Any guesses as to why someone would install a fitting onto the intake manifold that would allow you to unscrew part of it to open a hole in the manifold? I'm trying to get a friend's 1928 roadster pickup to start. It cranks well but never turned over until I removed the top of the fitting. It started once and ran very fitfully for about 10 seconds, then back to not starting. There are other issues with it, but I'm trying to understand the intake manifold hole. Thanks in advance.

05-11-2022, 04:54 PM	#2
The Master Cylinder Senior Member Join Date: Aug 2012 Posts: 886	Re: Hole in intake manifold - on purpose! Picture?? __________________ The Master Cylinder Enjoying life at the beach in SoCal...

05-11-2022, 05:04 PM	#3
burner31 Senior Member Join Date: Dec 2014 Location: Shawnee, Ok Posts: 3,471	Re: Hole in intake manifold - on purpose! Sounds like the vacuum port for the wipers __________________ Keith Shawnee OK '31 SW 160-B

05-11-2022, 05:05 PM	#4
rivcokid Senior Member Join Date: Sep 2018 Location: Riverside, CA Posts: 174	Re: Hole in intake manifold - on purpose! Hmmm. I might be but there are no wipers connected. Sorry, I didn't take a pic.

05-11-2022, 05:47 PM	#5
Chuck Dempsey Senior Member Join Date: May 2010 Location: Waynesville, NC Posts: 792	Re: Hole in intake manifold - on purpose! If you have a steel tube running under the very right side of the gas tank, or even the fittings designed to hold that tube, it came with a vacuum wiper...

05-11-2022, 06:46 PM	#6
Oldgearz Senior Member Join Date: Aug 2020 Location: Sagle, Idaho Posts: 359	Re: Hole in intake manifold - on purpose! Sponsored Links (Register now to hide all advertisements) The outlet for the vacuum wiper is 3" above the carb/manifold flange and faces outward directly toward the fender. I also have a fitting above that which is on the top of the manifold. I imagined it was for either measuring vacuum or to open and squirt in some starting fluid.

05-11-2022, 06:57 PM	#7
ponymare Senior Member Join Date: Sep 2014 Posts: 160	Re: Hole in intake manifold - on purpose! Could be it was put there to ad one of those ole wolf whistles.

05-11-2022, 08:22 PM	#8
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,904	Re: Hole in intake manifold - on purpose! Or it could be that a manifold off a car with a vacuum windshield wiper was put on this car that has an electric windshield wiper. To start your friend's car, I assume you have checked all the usual stuff. Spark, timing, compression, fuel, etc. Opening the hole in the manifold would have nothing to do with the car starting but would make it run lean and not idle. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. Last edited by nkaminar; 05-11-2022 at 08:27 PM.

05-11-2022, 09:25 PM	#9
old ugly Senior Member Join Date: Aug 2021 Location: alberta canada Posts: 585	Re: Hole in intake manifold - on purpose! i have had other car engines that the intake manifold has had a fitting installed for priming. __________________ old ugly my old father-in-law told me. "listen close when people tell you how to do stuff they may know something. then do it the way you want."

05-11-2022, 11:51 PM	#10
Richard in Anaheim CA Senior Member Join Date: May 2010 Location: Anaheim California Posts: 551	Re: Hole in intake manifold - on purpose! 28's had no vacuum port in the intake manifold. 29 and later had a vacuum port in the manifold which has a round boss around the hole. Many of the manifolds without a hole in the manifold were drilled later by owners or mechanics and would not have the round boss around the hole. Richard Anaheim CA

05-12-2022, 03:48 PM	#11
rivcokid Senior Member Join Date: Sep 2018 Location: Riverside, CA Posts: 174	Re: Hole in intake manifold - on purpose! Thanks everyone. I'll be back at it on Sunday (after rebuilding the carb) and will see how it goes. There's no hint of a steel tube for vacuum purposes. Will keep playing with it!