Go Back   Maxum Boat Owners Club - Forum > Maxum General > Engines
Click Here to Login
Register FAQ Community Calendar Today's Posts Log in

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-26-2019, 06:24 PM   #1
Ensign
 
Island llofe's Avatar
 
Join Date: Mar 2019
Posts: 8
Default Mercruiser 5.0 upgrade to 5.7 Vortec

I recently purchased this 1996 2300SC knowing thr engine had major issues when I got it ( pulled the dipstick to check the oil and water came out instead).

Instead of trying to fix this engine I decided now woild be thr time for an upgrade. Even though Ive never even ridden in this boat Im gonna go iut on a limb and say the 5.0 non vortec with a 2 barrel carb is underpowered.

This past weekend I turned on pandora, brought a handful of tools on board and went to town, getting the old engine stripped and ready to oull iut. During the disassembly, I now aee why the engine failed or at least what the end tesult was. The was a huge crack on the starboard side of the block, below the head. Im attaching pictures of the teardown.

Aside from the manifolds, risers, and bolt on accessories, everything will be replaced.
Attached Thumbnails
C6F251BD-4623-4D9F-9740-7F4D06BD65FF.jpg   12A92BAF-F6B3-4726-B746-94B8306C1331.jpg   576816C8-6D46-470B-9D17-734617992A48.jpg   CB768FE7-47B1-4399-B56C-CFFCA8B8F7CD.jpg   E7A35FCD-E088-4DE7-854A-5661E62DC30F.jpg  

__________________

Island llofe is offline   Reply With Quote
Old 03-26-2019, 06:51 PM   #2
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
Default

The crack in the block may not be the reason for the water intrusion as it's the outer wall of the cooling jacket. The only way this would be the source is if the block deck is cracked as well. However this crack is right up to the block deck so it is possible. There is rust in the exhaust ports which means the exhaust system is shot and leaking which is a more common reason for water in the oil. You need to replace the exhaust manifolds and elbows/risers.
__________________

__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is online now   Reply With Quote
Old 03-26-2019, 07:02 PM   #3
Ensign
 
Island llofe's Avatar
 
Join Date: Mar 2019
Posts: 8
Default

Quote:
Originally Posted by mmwjr View Post
The crack in the block may not be the reason for the water intrusion as it's the outer wall of the cooling jacket. The only way this would be the source is if the block deck is cracked as well. However this crack is right up to the block deck so it is possible. There is rust in the exhaust ports which means the exhaust system is shot and leaking which is a more common reason for water in the oil. You need to replace the exhaust manifolds and elbows/risers.
Thanks for the heads up man! Im not too concerned with what or why, I just want to hear this thing run and scoot in the water asap!
Island llofe is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 01:23 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.