83 SN Exhaust Leak?
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=21990
Printed Date: December-21-2024 at 9:57pm
Topic: 83 SN Exhaust Leak?
Posted By: 83SNGUY
Subject: 83 SN Exhaust Leak?
Date Posted: June-06-2011 at 2:02pm
Upon cranking and running my 83 SN with the 351 for the first time this season i noticed that it has a slight ticking sound coming from the port side of the engine. To me it sounds like an exhaust leak at the manifold but i am not sure.
Can anyone suggest a way to check this such as a spray or something to spray around each manifold?
Also, if it turns out to be an exhaust leak, can anyone suggest someone that may carry those gaskets?
thanks
marshall
nc
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mdc615
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Replies:
Posted By: Whitfield
Date Posted: June-06-2011 at 2:18pm
With the engine cold you can feel around the manifold with your hand for the leak for a good 2-3 min before it gets too hot. On a warm engine you can use a 3' to 6' legnth of 3/8" hose like a stethascope. One end to your ear and the other to the noise. Move it around the engine until you find the culprit.
I use usually automotive exhaust manifold gaskets (Block to exh man) since it is the same exhaust and not exposed to water. Most parts houses can match up your existing manifold gasket.
It is also suggested that you file the mainfold mating surfaces smooth and flat when you regasket. Some marine castings are not flat and true when new. I also like to replace the riser gaskets too ~ But they are boat store only and usually require preplanning / order in advance and delay for shipping.
As for the spray ~ that is usually reseved for finding vacuum leaks on the intake side.
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Michael ....
I'm the black sheep ~ 1984 Dixie 299 Super Skier (350 Chev PCM / counter rotation / Velvet drive) Open Bow.
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Posted By: 83SNGUY
Date Posted: June-06-2011 at 7:56pm
Michael,
thanks for the reply, i will give that a shot.
marshall
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mdc615
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