|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
03-27-2015, 05:10 PM | #1 |
Senior Member
Join Date: Oct 2014
Location: Central New Jersey
Posts: 395
|
Persistent Exhaust Leak - Help
When I bought this 29 A in Sept. 2014 the owner gave me a one piece exhaust manifold gasket (the cheap one with steel on one side). I installed that but still had a leak you could hear. I bought the expensive one from Bratton's (two piece copper) and installed that today. I still have small leak and can already see black on the cooper at the left rear.
My question s are: Can I or should I attempt to double the gaskets? Can I use that cooper high heat sealant they sell? If so can I re-use the gasket I just put in? What would you do? ......I can leave it alone too! I suspect the manifold is pitted as the area I can clearly see is very pitted. Thanks. Jim Last edited by jg61hawk; 03-27-2015 at 05:15 PM. |
03-27-2015, 05:16 PM | #2 |
BANNED
Join Date: May 2010
Location: Bucks County, PA
Posts: 11,454
|
Re: Persistent Exhaust Leak - Help
exhaust manifolds warp and droop over time especially around #4...
buy a new one and have it planed to match the intake. if both the intake and exhaust manifolds are replaced they dont need to get planed Last edited by Mitch//pa; 03-27-2015 at 05:23 PM. |
Sponsored Links (Register now to hide all advertisements) |
|
03-27-2015, 05:20 PM | #3 |
Senior Member
Join Date: May 2010
Location: Raleigh, NC
Posts: 510
|
Re: Persistent Exhaust Leak - Help
this sounds like a good case for surfacing the intake and exhaust manifold (bolted together as 1 unit) to achieve a flat surface. Multiple gaskets will not get you where you want to go to eliminate the leaks, do it right.
|
03-27-2015, 05:47 PM | #4 |
Senior Member
Join Date: Jul 2010
Location: Cow Hampshire
Posts: 4,174
|
Re: Persistent Exhaust Leak - Help
I've had the "elusive crack" give a similar indication. NOTHING I did to the manifold would solve the exhaust leak. New gaskets, doubling up, BETTER gaskets. All FAIL.
I dribbled engine oil ALL over the exhaust manifold. Voila - like a soap test - bubbles. The cracks were multitudinous and general. When the manifold was removed from the car and struck with a hammer, it fell easily into several pieces. One doesn't usually see oil "bubble." Hot must help. Joe K
__________________
Shudda kept the horse. |
03-27-2015, 06:03 PM | #5 |
Senior Member
Join Date: May 2014
Location: Commercial Point, Ohio
Posts: 239
|
Re: Persistent Exhaust Leak - Help
Unfortunately, I agree with Mitch. Sounds like it is time for a new exhaust manifold.
I had to replace my muffler and was having trouble getting it attached to my exhaust manifold correctly. Upon closer inspection, I realized that the problem wasn't my new muffler, it was my manifold. It had drooped well over an inch around #4. I replaced both manifolds at the same time and haven't had any trouble since. |
03-27-2015, 07:02 PM | #6 |
Senior Member
Join Date: Sep 2014
Location: oroville calif
Posts: 893
|
Re: Persistent Exhaust Leak - Help
Sponsored Links (Register now to hide all advertisements)
|
03-27-2015, 07:58 PM | #7 |
Senior Member
Join Date: May 2010
Location: Camino, CA.
Posts: 3,086
|
Re: Persistent Exhaust Leak - Help
I always use the paste muffler sealer (be careful, it's messy), and a interior tube between the manifold and the exhaust pipe. No leaks.
|
03-28-2015, 07:35 AM | #8 | |
Senior Member
Join Date: May 2010
Location: Rhode Island
Posts: 1,868
|
Re: Persistent Exhaust Leak - Help
Quote:
Yes there were rings. First install the intake and exhaust assembly with the rings and no gasket. Don't bolt it on just put it up against the block to make sure it mates flat with the block while the rings are installed. You check this because the block and exhaust manifold may have been resurfaced which makes the rings too thick and you can crack your exhaust manifold if they are. If it mates flush with rings and no gasket then you can reinstall with gasket. If the rings are too thick file them first. |
|
03-28-2015, 08:18 AM | #9 | |
Senior Member
Join Date: Jul 2010
Location: Cow Hampshire
Posts: 4,174
|
Re: Persistent Exhaust Leak - Help
Quote:
Then, a little before engine A1213500 counterboring was begun again - but only for the exhaust ports - and engines were done like this until the end of production. So there is a chance you might have an engine with NO counterbores. See this and more block changes at Steve Plucker's seminal work "Changes to the Model A Engine Block" at http://www.plucks329s.org/pdf/engine...ESCRIPTION.pdf Thanks Steve. Lot of work in that. Joe K
__________________
Shudda kept the horse. |
|
03-28-2015, 11:23 PM | #10 |
Senior Member
|
Re: Persistent Exhaust Leak - Help
if it has been leaking for a while, the manifold with have damage on its face. inspect the block and manifold for smoothness and have milled as required.
__________________
What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II |
03-29-2015, 08:59 AM | #11 |
Senior Member
Join Date: Sep 2011
Location: Luck WI
Posts: 550
|
Re: Persistent Exhaust Leak - Help
Mine had a good amount of leak also. However I also had a hole cut for a heater port in the firewall. It is cold a good part of the time here so decided to put a good meaning no drooping on #4, waffle style manifold on. Problem solved no leak and now I have heat when I need it.
__________________
Jon "If you choose to not decide, you still have made a choice!" RUSH Don't tell me what you know..... Tell me what you have done. |
Thread Tools | |
Display Modes | |
|
|
Sponsored Links (Register now to hide all advertisements) |
|