Exhaust manifold discovery?

TXGlastron

Cadet
Joined
Jan 22, 2022
Messages
25
Good morning. With all the things I have learned about this boat I purchased, GXL 235 Mercruiser 5.0, I think I just found a serious issue. Hopefully I’m attaching a picture as well. Is this my exhaust manifold cracked?
IMG_1923.jpeg
 

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
12,072
ahhh, wellll...YEAH
Was this boat winterized? If so, how?
if that's cracked check the other manifold and the sides of the block on both sides, as well as checking for water in the oil after firing it up.
 

airshot

Rear Admiral
Joined
Jul 22, 2008
Messages
4,533
That is a pretty serious crack, hate to see what the rest of the block looks like !! Quite noticible...you didn't see this before purchase ??
 

TXGlastron

Cadet
Joined
Jan 22, 2022
Messages
25
I don’t see any other issues on the block, and the motor runs well. However, I’m thinking this is not safe at all to use and must replace. Am I correct?
 

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
12,072
of course!
that will fill your bilge with water in no time!
how long have you owned this, & has it been run yet?
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,953
That is a classic example of thermal declination material breach due to volumetric expansion

Your block is most likely cracked too

If your block isnt, buy a lottery ticket
 
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