Like Tree0Likes

Can you really trust the guy doing a psi test

Reply
Old 06-19-2007, 01:18 PM
  #1
Registered
Thread Starter
 
StraightJacket's Avatar
 
Join Date: May 2006
Location: In a box, s. side of chi town
My Boats: 38 Fountain Fever with #4's, ok so it really 35
Posts: 793
Default Can you really trust the guy doing a psi test

Well I screwed up and trusted the machine shop to pressure test the GIL manifolds, I should have done this set myself like the other pair. Two hours one the fresh motors and this is what we have got.
#1 cyl. both valve heads missing , stems bent combustion chamber wiped out, and the piston beat to oblivion with a nice hole.
#4 cyl. recieved the intake valve from #1 and pieces that beat up that piston and punched a hole in that combustion chamber.

lucky for us it didn't score the cyl. walls and the rods are fine. I should have all the parts by the end of the week and new manifolds mid. of next week. Hope the pics post
Attached Thumbnails
Can you really trust the guy doing a psi test-brishead1.jpg   Can you really trust the guy doing a psi test-brishead4.jpg   Can you really trust the guy doing a psi test-brispiston.jpg  


Last edited by StraightJacket; 06-19-2007 at 01:27 PM. Reason: no pics
StraightJacket is offline  
Reply With Quote
Old 06-19-2007, 01:57 PM
  #2
Registered
Trade Score: (1)
 
Single With Twins's Avatar
 
Join Date: Oct 2005
Location: Orangeville, ONT. CAN
My Boats: 36 Nor-Tech
Posts: 589
Default

..............very sorry to hear that, hope they contribute to lesson the blow to your wallet........good luck.
Single With Twins is offline  
Reply With Quote
Old 06-19-2007, 02:29 PM
  #3
Registered
Thread Starter
 
StraightJacket's Avatar
 
Join Date: May 2006
Location: In a box, s. side of chi town
My Boats: 38 Fountain Fever with #4's, ok so it really 35
Posts: 793
Default

Yeah right , and to add insult to injury I JUST NOTICED A CRACK in the #1 cyl. whenI was honing it. Now I have to go pick up my other block and get it line bored for this rotating assembly.
StraightJacket is offline  
Reply With Quote
Old 06-19-2007, 03:42 PM
  #4
SORE MEMBER
Platinum Member
 
Wobble's Avatar
 
Join Date: Apr 2004
Location: 2950'49.74"N 95 5'17.55"W.......TEXAS
My Boats: SeaDoo RXP & RXP-X, Stryker Equalizer 28, Eliminator Daytona Jet
Posts: 6,705
Default

were they new valves with the freshened motors? Have you verified that the exhaust is now leaking? I feel your pain as I have experienced similar damage from a dropped valve, it was due to a valve guide failure on a supposedly freshened head allowing the valve to wobble until it broke off and went through two other cylinders and one piston wall.

I think that a pressure test is only good for the time it is made and can not be used as an indicator of serviceability, one heat cycle can make a corroded weld crack and it seems that certain CMI's have had some issues with that.
Wobble is online now  
Reply With Quote
Old 06-19-2007, 07:55 PM
  #5
Charter Member#330
Charter Member
Trade Score: (1)
 
MrCIG's Avatar
 
Join Date: Oct 2000
Location: CHICAGO, IL
My Boats: 1985 38 Cigarette 2004 Formula 400SS
Posts: 2,371
Default

Brian, I am back from the Ozarks. Let me know when you want to pick up the heads. I will give you a call

Mark
__________________
If you like it rough do it OFFSHORE!!!
MrCIG is offline  
Reply With Quote
Old 06-20-2007, 07:38 AM
  #6
Gold Member
Gold Member
 
Join Date: Nov 2003
Location: Singapore
Posts: 119
Default

Quote:
Originally Posted by Wobble View Post
were they new valves with the freshened motors? Have you verified that the exhaust is now leaking? I feel your pain as I have experienced similar damage from a dropped valve, it was due to a valve guide failure on a supposedly freshened head allowing the valve to wobble until it broke off and went through two other cylinders and one piston wall.

I think that a pressure test is only good for the time it is made and can not be used as an indicator of serviceability, one heat cycle can make a corroded weld crack and it seems that certain CMI's have had some issues with that.
Wobble

I agree with that I had one that would only leak of you heated the ports with a couple of gas axes while under pressure with hot water in it...if in doubt chuck it out.
Too bad more dont have their manifolds in the heat exchanger circuit as I'm know we would have many more happy boaters.
powerabout is offline  
Reply With Quote
Old 06-20-2007, 07:43 AM
  #7
Registered
 
sommerfliesby's Avatar
 
Join Date: Sep 2002
Location: Frankfort, IL
My Boats: 2010 Active Thunder 37 Excess
Posts: 4,279
Default

That SUCKS Brian! With the amount of time you've put into this, I'm surprised I didn't hear your reaction to the cracked cylinder wall at my house!
sommerfliesby is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Audiofn
General Q & A
4
11-22-2004 11:11 PM
Mad Hatter
General Boating Discussion
6
08-11-2003 12:55 AM



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



All times are GMT -5. The time now is 01:35 PM.


Copyright 2011 OffShoreOnly. All rights reserved.