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02-08-2023, 09:08 AM | #1 |
Member
Join Date: Dec 2021
Posts: 33
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Finding exhaust leaks?
I would like to find where my exhaust is leaking. Has anyone tried spraying water or oil into the throat of the carburetor, while the car is running, to create smoke or steam to watch for leaks?
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02-08-2023, 09:23 AM | #2 |
Senior Member
Join Date: Jul 2010
Location: Cow Hampshire
Posts: 4,188
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Re: Finding exhaust leaks?
I had an exhaust leak and must have re-established the connection between manifold and block, and between manifold and exhaust pipe three times. I even tried the "gasket & sleeve" that some use between the pipe and manifold.
Did you know that there are several "patterns" of clamps used between the pipe and manifold. I had half a dozen clamps handy and at least half of these I would consider "skimpy" in dimension. What I think is the oldest and seems to have the most material may be an "original." (I.e. this something else to check.) But that is not where my issue was. Rather the cast manifold itself had "hairline cracks" which I discovered while trying oil between the block and manifold as a kind of "bubble test." I was generous with the oil. Dribbled across the hot manifold. The bubbles instead I found on the top and across the manifold surface itself - but the manifold itself SEEMED whole. Removing it and dropping it on the pavement caused the manifold to break into half a dozen pieces. Many of the cracks appeared long term with rust in the juncture. Joe K
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02-08-2023, 11:10 AM | #3 |
Senior Member
Join Date: Dec 2013
Location: Mossel Bay, about 300km from Cape Town
Posts: 530
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Re: Finding exhaust leaks?
Ezlife,
Get yourself a piece of hose, garden hose, rubber hose, whatever and use it as an ear piece. Hold one side close to your ear and the other, “sniffing” around the joints of the manifold and engine. Works like a phone.
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Regards Chris Cape Town 28 Model A RPU, 29 Chevy Phaeton, 67 E Type FHC, 67 250SL Pagoda, 83 911 SC |
02-08-2023, 04:04 PM | #4 |
Senior Member
Join Date: Nov 2018
Location: Farmington MI
Posts: 284
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Re: Finding exhaust leaks?
A little "flag" can help... with a little piece of tissue paper on the end of a stick. Move your tiny "flag" around the suspect joints and look for the 'friendly wave'
Joe B |
02-08-2023, 11:37 PM | #5 |
Senior Member
Join Date: May 2010
Location: on the Littlefield
Posts: 6,159
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Re: Finding exhaust leaks?
I use a piece of hose.
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02-09-2023, 02:19 AM | #6 |
Senior Member
Join Date: May 2010
Location: California
Posts: 979
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Re: Finding exhaust leaks?
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Bob Last edited by Bob Johnson; 02-09-2023 at 02:21 AM. Reason: more info |
02-09-2023, 09:51 AM | #7 | |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
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Re: Finding exhaust leaks?
Quote:
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