Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-26-2015, 04:30 PM   #21
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Perry Hall, Maryland
Posts: 5,469
Default

The rust around the riser is typically a sign the the interface is leaking.

Good thing you are replacing the exhaust.
__________________

__________________
Mike
mmwjr is offline   Reply With Quote
Old 04-26-2015, 06:31 PM   #22
Captain
 
Kevlar7r's Avatar
 
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 742
Default

Yea. My other motor has dry joint exhaust, and they look great. Ordered new gaskets and putting it back together.
__________________

Kevlar7r is offline   Reply With Quote
Old 04-27-2015, 02:21 PM   #23
Captain
 
Kevlar7r's Avatar
 
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 742
Default

What really keyed me in to the starboard exhaust was this picture from September. The exhaust had just been pulled and inspected a few months before this pic. Compare that to the pic I posted earlier, and noticed just how much the rust has grown.
Attached Images
File Type: jpg 33.jpg (47.0 KB, 30 views)
Kevlar7r is offline   Reply With Quote
Old 05-20-2015, 04:05 PM   #24
Captain
 
Kevlar7r's Avatar
 
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 742
Default

Well, got the project all done. That starboard exhaust was just starting to leak, so I think I timed the exhaust replacement perfectly.



Both engines were running beautiful, until I put it under load, and port head gaskets blew again.



I used sierra head gaskets, and I had my doubts about them, as they didn't have compression rings around the cylinder bore, and no top/bottom markings.... But it was the right part number, so I went ahead with it. Haven't torn down yet, but I'm picking up a set of mercruiser gaskets today.



Cross your fingers that I don't find other issues when I tear in.
Kevlar7r is offline   Reply With Quote
Old 05-20-2015, 07:17 PM   #25
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Perry Hall, Maryland
Posts: 5,469
Default

Did you also check the head and block deck for flatness?
__________________
Mike
mmwjr is offline   Reply With Quote
Old 05-20-2015, 07:22 PM   #26
Captain
 
Kevlar7r's Avatar
 
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 742
Default

Heads got magnafluxed, decked, and a valve job while they were out. Did not check the block though, I don't have an accurate enough straight edge to really do it.
Kevlar7r is offline   Reply With Quote
Old 05-20-2015, 07:27 PM   #27
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Perry Hall, Maryland
Posts: 5,469
Default

Quote:
Originally Posted by Kevlar7r View Post
Heads got magnafluxed, decked, and a valve job while they were out. Did not check the block though, I don't have an accurate enough straight edge to really do it.

The heads were decked, so they were not flat. This would make me question the block's flatness, may want to consider getting an accurate straight edge otherwise you could be wasting your time and $'s
__________________
Mike
mmwjr is offline   Reply With Quote
Old 05-22-2015, 02:56 PM   #28
Lt. JG
 
Join Date: Apr 2015
Location: Seattle, WA
Posts: 36
Default

If the heads were not flat, there is a probability the block is not as well. I suspect if you check it, you will discover it isn't.
__________________
Phil, Vicky, Ashleigh & Sydney
1998 3055

Life is short, boats are cool.
itsabowtime2 is offline   Reply With Quote
Old 05-22-2015, 05:44 PM   #29
Captain
 
Kevlar7r's Avatar
 
Join Date: Aug 2014
Location: Jacksonville, FL
Posts: 742
Default

Intake manifold just came off and there is evidence of water in the intake ports of the cylinders I got water out if. I'm wondering if maybe the intake gaskets failed, not the head gaskets, and poured water in through the intake. Grabbing a compression tester.



If there is normal compression all the way around, I am considering not pulling the heads. And putting it back together with better intake gaskets.



Thoughts?
Kevlar7r is offline   Reply With Quote
Old 05-22-2015, 08:44 PM   #30
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Perry Hall, Maryland
Posts: 5,469
Default

How much was shaved off the heads? Just wondering if too much can be removed that could cause the intake not to seat properly.

I guess if the compression is good I would try reinstalling the intake as well.
__________________

__________________
Mike
mmwjr is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 06:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.