Go Back  Offshoreonly.com > Technical > General Q & A
2008 Merc 525 Dropped Exhaust Valve >

2008 Merc 525 Dropped Exhaust Valve

Notices

2008 Merc 525 Dropped Exhaust Valve

Old 09-26-2012, 08:29 AM
  #1  
Registered
Thread Starter
 
Join Date: Sep 2012
Location: Dallas, Tx
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default 2008 Merc 525 Dropped Exhaust Valve

Hello everyone! I'm new here... My buddy dropped the exhaust valve on #8 cylinder a few weeks back. The engine is a Mercury 525 EFI Blue engine. The new (from Merc) long block is on it's way soon. I guess because he's buying new they don't want the core. Is there any value to this engine with heads. The one head is trashed, from what we can tell is the pro comp hyd rocker arm bearing failed causing the exhaust valve to stick open, then broke off and smashed up #8 cyl. pretty good. I will try to get pics up. I will also get the serial number. Any sugestions on what to do with this block and heads is much appreciated!
cklpilot is offline  
Old 09-26-2012, 12:30 PM
  #2  
Registered
 
Join Date: Mar 2009
Location: OFallon,Mo.
Posts: 1,758
Likes: 0
Received 3 Likes on 2 Posts
Default

May be able to sleeve that cylinder and get a new piston and head. Are those aluminum heads? I've had aluminum heads repaired where the combustion chamber was beat to hell from dropping a valve.
picklenjim is offline  
Old 09-26-2012, 12:44 PM
  #3  
Platinum Member
Platinum Member
iTrader: (7)
 
eddie's Avatar
 
Join Date: Oct 2007
Location: Osage Beach, Missouri - 28mm
Posts: 2,251
Likes: 0
Received 8 Likes on 4 Posts
Default

They have some used value and can be repaired. You can put them in the swap shop here, someone will want them.
eddie is offline  
Old 09-26-2012, 01:06 PM
  #4  
Registered
iTrader: (4)
 
Join Date: Jul 2007
Location: Oneida Lake NY
Posts: 3,641
Received 29 Likes on 6 Posts
Default

They are alum head, edlebrock heads I am pretty sure.

Lots of good stuff in that engine, someone will want it.

I would suggest having someone tear the rotating assembly out, checking the block good and crank for true. If that stuff checks out you will get more money IMO. Cost to do so should be minimal.

How many hours were on the engine?
4bus is offline  
Old 09-26-2012, 02:44 PM
  #5  
Registered
 
Knot 4 Me's Avatar
 
Join Date: Jun 2005
Location: Central IL
Posts: 8,353
Received 736 Likes on 397 Posts
Default

Check the headers while they're off the engine.
Knot 4 Me is offline  
Old 09-26-2012, 02:48 PM
  #6  
Charter Member #1171
Charter Member
 
obnoxus's Avatar
 
Join Date: Feb 2001
Location: Clearwater, FL
Posts: 4,019
Received 21 Likes on 16 Posts
Default

Originally Posted by knot 4 me
check the headers while they're off the engine.
+ 1000
__________________
I want to live in a world where a chicken can cross the road and not have its motives questioned.
obnoxus is offline  
Old 09-26-2012, 03:45 PM
  #7  
Registered
 
Join Date: Sep 2012
Location: Lake Conroe, TX
Posts: 14
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Knot 4 Me
Check the headers while they're off the engine.
if it's a 2008 it should have the newer cool flange headers. Are they having problems too?
tx howard is offline  
Old 09-26-2012, 06:39 PM
  #8  
Registered
Thread Starter
 
Join Date: Sep 2012
Location: Dallas, Tx
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

No problems with the headers, were going to
Get them pressure test before we go in with
The new long block. #7 spark plug has been
Showing a little rust, but that's after winter
Lay-up. Can anyone tell me how to upload a
Picture?
cklpilot is offline  
Old 09-26-2012, 06:46 PM
  #9  
Registered
Thread Starter
 
Join Date: Sep 2012
Location: Dallas, Tx
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

It's a 2009. OM961968. 160hrs.
cklpilot is offline  

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 On
Pingbacks are On
Refbacks are On


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.