Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-24-2021, 10:52 AM   #1
Standing Elk
Senior Member
 
Join Date: Aug 2017
Location: St. Maries, Idaho
Posts: 162
Default Intake leak

What is the best way to check for an intake manifold leak? Thanks
Standing Elk is offline   Reply With Quote
Old 05-24-2021, 11:08 AM   #2
jayvee34
Senior Member
 
jayvee34's Avatar
 
Join Date: Apr 2021
Location: St. Augustine, Fl.
Posts: 437
Default Re: Intake leak

With engine running at idle spray carburetor cleaner along the intake. If engine speeds up
slightly you have a leak. If engine won't idle down you probably have a vacuum leak
somewhere.
Hope this helps.
John

P.S. keep spray away from hot exhaust manifold. spray is flammable.
__________________
IN GOD WE TRUST - SEMPER FIDELIS
John

Last edited by jayvee34; 05-24-2021 at 11:19 AM. Reason: saftey
jayvee34 is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-24-2021, 01:29 PM   #3
Benson
Senior Member
 
Join Date: May 2010
Posts: 2,579
Default Re: Intake leak

Best thing I have found is to use a small rubber hose like windshield wiper fluid hose and listen for leaks around manifold while engine is running.

At 74 I can still hear well enough to tell if there is a leak.

Problem with un-lit torch or Carb cleaner is that the fumes find there way to carb inlet and change the speed giving false indication.

That is my experience anyway ... For what is worth.
Benson is offline   Reply With Quote
Old 05-24-2021, 03:03 PM   #4
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Largo Florida
Posts: 7,225
Default Re: Intake leak

I like propane or ether [ start fluid].
Patrick L. is offline   Reply With Quote
Old 05-25-2021, 08:56 AM   #5
old31
Senior Member
 
Join Date: Jan 2016
Posts: 2,088
Default Re: Intake leak

Sponsored Links (Register now to hide all advertisements)
I like propane, it does not leave a mess. When it finds a leak the RPMs will increase.
old31 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 11:59 AM.