Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #11  
Old 08-05-2014, 01:48 PM
spievy79 spievy79 is offline
TT Regular
 
Join Date: Sep 2013
Boat: Ski Supreme, Sierra SS,1987, 351W 240hp
Location: Midwest
Posts: 55
And on a side note the crack was so corroded when we discovered it, it appears it may have been that way for a while. I never found a trace of water in the oil either when emptying it. The PO obviously didn't winterize it correctly.
Reply With Quote
  #12  
Old 08-05-2014, 02:41 PM
curver900 curver900 is offline
TT Enthusiast
 
Join Date: Aug 2013
Boat: Mastercraft, prostar 2001 205v
Location: midwest
Posts: 350
Quote:
Originally Posted by spievy79 View Post
We ended up making a channel and welding it at my buddy's machine shop. No damage to the cylinders it appears. I'll run it and seehow long it lasts. I figure I'm in the same boat either way needing a new block, but maybe I can finish out the summer with any luck and rebuild over the winter. Anyone see any reason to not do that please advise.
Just make sure you have an anchor and a tow rope so the pontoon can tow you home....
Reply With Quote
  #13  
Old 08-05-2014, 03:09 PM
spievy79 spievy79 is offline
TT Regular
 
Join Date: Sep 2013
Boat: Ski Supreme, Sierra SS,1987, 351W 240hp
Location: Midwest
Posts: 55
Ha ha, will do!
Reply With Quote
  #14  
Old 08-05-2014, 03:30 PM
CantRepeat's Avatar
CantRepeat CantRepeat is online now
 
Join Date: Jul 2008
Boat: 06 X30
Location: Roll Tide!!
Posts: 8,438
Did you pre heat the cast iron before welding?
__________________
Tim
Gone, surfing.
Reply With Quote
  #15  
Old 08-05-2014, 03:35 PM
spievy79 spievy79 is offline
TT Regular
 
Join Date: Sep 2013
Boat: Ski Supreme, Sierra SS,1987, 351W 240hp
Location: Midwest
Posts: 55
We attempted to with a torch but we do not know what temp we got it up to. After reading some lit on welding iron it is pretty clear we didn't do it correctly, my main question is: running it and if it fails will I cause any other damage to parts I will want to swap over once I buy a new block, ie: heads, intake, etc?
Reply With Quote
  #16  
Old 08-05-2014, 08:33 PM
JimN's Avatar
JimN JimN is offline
MC Master Poster
 
Join Date: Jul 2004
Posts: 11,567
Quote:
Originally Posted by mikeg205 View Post
JB Weld? was wondering if that was going to come up ...
If it's external, it can work, especially if the crack is small. Not an ideal fix, but it can work.
Reply With Quote
  #17  
Old 08-06-2014, 01:31 PM
spievy79 spievy79 is offline
TT Regular
 
Join Date: Sep 2013
Boat: Ski Supreme, Sierra SS,1987, 351W 240hp
Location: Midwest
Posts: 55
The crack is internal, its about 2" long along the water jacket.
Reply With Quote
  #18  
Old 08-12-2014, 09:31 PM
spievy79 spievy79 is offline
TT Regular
 
Join Date: Sep 2013
Boat: Ski Supreme, Sierra SS,1987, 351W 240hp
Location: Midwest
Posts: 55
Well, got everything back together and surprisingly the weld held. I pulled off the intake to check it after getting milky oil. Turns out of the head gaskets was leaking at a water jacket. I ended up replacing both head gaskets and put everything back together. I drained the oil then left the drain open and poured a quart of fresh oil down there just to try and get more crappy oil out. I changed the filter and put in the new oil. When I tried to crank it over it was slow. It almost fired a few times but its cranking really slow. I tried two different good batteries with no luck and pulled all the plugs and cranked to get any other water out. Any ideas on this one? Mind you, this is just a band aid situation for the remainder of the season, I'll be getting a new short block over the winter. Just giving it a try for a few extra weeks of possible boating.
Reply With Quote
  #19  
Old 08-12-2014, 10:03 PM
1redTA's Avatar
1redTA 1redTA is offline
MC Devotee
 
Join Date: Aug 2009
Boat: 1981 MasterCraft 351W slot
Location: Pace, FL
Posts: 1,067
welding cast iron is tricky, I've done it in the past on vises and whatnot but didn't trust the process enough on an engine. find a 351 W block at a pull a part yard, have it hot tanked, throw your parts in it after glaze braking the bore
__________________
1981 MasterCraft
19' Skier 351W PowerSlot
Long gone is the Trans AM waiting for another
Reply With Quote
  #20  
Old 08-12-2014, 10:22 PM
spievy79 spievy79 is offline
TT Regular
 
Join Date: Sep 2013
Boat: Ski Supreme, Sierra SS,1987, 351W 240hp
Location: Midwest
Posts: 55
The weld is actually holding thus far. I'm struggling with it cranking over slowly after putting it all back together, after having water in the oil from a bad head gasket.
Reply With Quote
Reply

Thread Tools
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


All times are GMT -4. The time now is 07:58 PM.