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 07-08-2018, 08:28 AM   #1
Brendan
Senior Member
 
Brendan's Avatar
 
Join Date: May 2010
Location: At my kitchen table in Santa Rosa, Ca
Posts: 2,646
Default Exhaust leak at manifold

i have a exhaust leak at the header where it bolts to the block. i have, changed the gasket, and still leaks. i won't to get the header resurfaced.its the cast iron one. do i need to get the intake resurfaced with it, so they can take off the same amount
__________________
If it would have been a snake it would have bit ya!

i can't spell my way out of a paper bag!
Brendan is offline   Reply With Quote
Old 07-08-2018, 08:33 AM   #2
Brendan
Senior Member
 
Brendan's Avatar
 
Join Date: May 2010
Location: At my kitchen table in Santa Rosa, Ca
Posts: 2,646
Default Re: Exhaust leak at manifold

this is the set up i have
Attached Images
File Type: jpg model a header.jpg (13.9 KB, 39 views)
File Type: jpg model a manafolds.jpg (16.5 KB, 47 views)
__________________
If it would have been a snake it would have bit ya!

i can't spell my way out of a paper bag!
Brendan is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 07-08-2018, 08:44 AM   #3
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Alberta, Canada
Posts: 1,376
Default Re: Exhaust leak at manifold

Would using muffler cement for gasket sealer work?
__________________
Talk slow, think fast.
katy is offline   Reply With Quote
Old 07-08-2018, 08:44 AM   #4
redmodelt
Senior Member
 
redmodelt's Avatar
 
Join Date: May 2010
Location: Portland OR
Posts: 3,827
Default Re: Exhaust leak at manifold

Photos added while I was typing. My suggestion was about original type setup.
__________________
I know the voices aren't real but damn they have some good ideas!
redmodelt is offline   Reply With Quote
Old 07-08-2018, 08:48 AM   #5
Brendan
Senior Member
 
Brendan's Avatar
 
Join Date: May 2010
Location: At my kitchen table in Santa Rosa, Ca
Posts: 2,646
Default Re: Exhaust leak at manifold

i would think you need the same amount of material from both. would that be right?
__________________
If it would have been a snake it would have bit ya!

i can't spell my way out of a paper bag!
Brendan is offline   Reply With Quote
Old 07-08-2018, 09:10 AM   #6
BILL WILLIAMSON
Senior Member
 
BILL WILLIAMSON's Avatar
 
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,328
Default Re: Exhaust leak at manifold

YES!! I futzed with pesky assed leaks on Minerva. Used different types of gaskets, etc. FINALLY, I used the laminated COPPER gasket, with a thin ring of Exhaust Sealer on each side & she was PERFECTLY QUIET!!
Bill Kzhaustfixer
Quote:
Originally Posted by katy View Post
Would using muffler cement for gasket sealer work?
__________________
"THE ASSISTANT GURU OF STUFF"
BILL WILLIAMSON is offline   Reply With Quote
Old 07-08-2018, 11:55 AM   #7
Railcarmover
Senior Member
 
Railcarmover's Avatar
 
Join Date: Apr 2017
Location: Sacramento
Posts: 567
Default Re: Exhaust leak at manifold

Measure the tabs on the manifolds,if the intake and exhaust are different thicknesses it will affect your clamping force.You can avoid the machine shop as well.
Railcarmover is offline   Reply With Quote
Old 07-08-2018, 09:06 PM   #8
Chris Haynes
Senior Member
 
Chris Haynes's Avatar
 
Join Date: May 2010
Location: North Hills, CA and Pine Grove, CA
Posts: 2,011
Default Re: Exhaust leak at manifold

The problems with stock cast iron manifolds is that over time the rear cylinder port will droop. When this happens you can never line up all four ports anymore. The only fix is a new manifold.
__________________
1930 Tudor
Early 1930 AA
Speed costs money. How fast do you want to go?
Chris Haynes is offline   Reply With Quote
Old 07-08-2018, 10:06 PM   #9
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 1,564
Default Re: Exhaust leak at manifold

Do you have a way to hold the two together so you can straight edge the block mating edge? . The key is as mentioned, the ears the concave washers go on, have to be the same height, as well as the two manifolds have to be flush.
Chuck Sea/Tac is offline   Reply With Quote
Old 07-08-2018, 10:38 PM   #10
Railcarmover
Senior Member
 
Railcarmover's Avatar
 
Join Date: Apr 2017
Location: Sacramento
Posts: 567
Default Re: Exhaust leak at manifold

The cast header and weber intake are stout,no 'droop'like on an A exhaust manifold. Im doing a vacuum leak on one lashed to a Miller/Serr head..the washers provided dont bridge as well as stock A ones do.the tab height is critical for a good seal.
Railcarmover is offline   Reply With Quote
Old 07-11-2018, 07:49 PM   #11
RonC
Senior Member
 
RonC's Avatar
 
Join Date: May 2010
Location: Rhode Island
Posts: 1,822
Default Re: Exhaust leak at manifold

Buy the repro exhaust and intake manifold setup. They are well worth the money and along with an Aries muffler you will achieve a leak less setup that sounds like a Model A should.
RonC is offline   Reply With Quote
Old 07-11-2018, 09:01 PM   #12
larrys40
Senior Member
 
Join Date: May 2010
Location: St Charles , Missouri
Posts: 1,545
Default Re: Exhaust leak at manifold

I concur with Ron on above post. I saw a young fellow last week who spent a lot of money in a Weber and header setup like that and in all honesty he would have saved a ton of money and ran better for his stock worn out engine than the setup. Unfortunate advice and way to much unnecessary funds spent from the forum here in my opinion.

His appeared to havechecsamd issue. I think it should be surfaced the same but agree the larger face washers would pull in better then he small ones supplied.

My vote would be a stock manifold but you’ll most likely have to find someone willing to surface them to get them to seal properly
Larry shepard
larrys40 is offline   Reply With Quote
Old 07-13-2018, 03:51 PM   #13
chap52
Senior Member
 
chap52's Avatar
 
Join Date: Jun 2013
Location: Marana Arizona
Posts: 1,138
Default Re: Exhaust leak at manifold

Here is something you might try with the manifold. I know he is resurfacing a head, but it may be worth a try.
https://www.youtube.com/watch?v=SK2R2LdkLKs&t=7s
chap52 is offline   Reply With Quote
Old 07-13-2018, 04:40 PM   #14
Dave in MN
Senior Member
 
Dave in MN's Avatar
 
Join Date: May 2010
Location: Jordan, MN
Posts: 1,069
Default Re: Exhaust leak at manifold

Last Fall, I took delivery on a cast iron header as you show in your photo in Post #2. It was warped right from the supplier. I noticed it before I installed it and Snyder's promptly shipped me a replacement that was straight.

Something happened during the machining...Maybe you received one from the same batch!

The photos you show look like new product...Maybe you could exchange it for a straight one.
Good Day!

Last edited by Dave in MN; 07-13-2018 at 04:55 PM.
Dave in MN is offline   Reply With Quote
Old 07-13-2018, 07:52 PM   #15
Brendan
Senior Member
 
Brendan's Avatar
 
Join Date: May 2010
Location: At my kitchen table in Santa Rosa, Ca
Posts: 2,646
Default Re: Exhaust leak at manifold

i took the manifold off today. took it to the Machine shop, he checked it with a straight edge. it was straight. the gasket dose not fit right. you can see where it dose not fit. there was a bad casting. i had it on the car where it did not leak. i have to order a new gasket and fit it right
__________________
If it would have been a snake it would have bit ya!

i can't spell my way out of a paper bag!
Brendan is offline   Reply With Quote
Old 07-14-2018, 10:27 AM   #16
DHZIEMAN
Senior Member
 
Join Date: Dec 2016
Location: Sunrise Beach, Mo
Posts: 164
Default Re: Exhaust leak at manifold

Use muffler caulk (cement)! That is what I used for joining the exhaust pipe to the manifold, been that way now for over a year. No reason the same will not work between engine and exhaust manifold!
DHZIEMAN 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 06:09 PM.