85 mercruiser 140 MR

jviola

Cadet
Joined
May 31, 2012
Messages
11
So over the weekend I decided to do the exhaust gasket and found where the drip on the side of the motor was coming from the is only water coming out does anyone think JB weld would do the job to hold over until I can save up for a new motor? I also pulled the head off to check the cylinders and everything was fine not a drip of water or surface rust whatsoever so I believe the crack is just external but has anyone ever seen one like this before? also hoping that the new head gasket and exhaust gasket will fix the issue with cylinder 3 not firing even though it has good compression, fuel and spark. :facepalm:
 

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Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: 85 mercruiser 140 MR

but has anyone ever seen one like this before?

Very common crack when a 3.0L engine freezes, and yes people JB weld them.
 
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