Go Back  Offshoreonly.com > Technical > General Q & A
leak down test >

leak down test

Notices

leak down test

Thread Tools
 
Old 01-22-2013 | 10:56 AM
  #31  
Registered
20 Year Member
 
Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
Default

Hopefully a roller lifter didn't come apart
MILD THUNDER is offline  
Reply
Old 01-22-2013 | 11:16 AM
  #32  
obnoxus's Avatar
Charter Member #1171
20 Year Member
Charter Member
 
Joined: Feb 2001
Posts: 4,018
Likes: 21
From: Clearwater, FL
Default

Originally Posted by MILD THUNDER
Hopefully a roller lifter didn't come apart
Makes cool grooves in the cam,,,,,,wanna see !!!!??
__________________
I want to live in a world where a chicken can cross the road and not have its motives questioned.
obnoxus is offline  
Reply
Old 01-22-2013 | 12:36 PM
  #33  
Registered
10 Year Member
 
Joined: May 2011
Posts: 3,313
Likes: 24
From: medina ohio/ vermilion ohio
Default

Originally Posted by obnoxus
Makes cool grooves in the cam,,,,,,wanna see !!!!??
on your boat share...... on mine NOOOOOOO. lol lets hope it is some thing on the top end thats causing it because was planing to do them any way.... bought the boat with 345 hours and on about 15 or 20. didnt run as much trying to recoupe form buying the boat. with having near 20% leak down on some cylinders should i just go ahead and have them pull the heads any way and have them checked and new head gaskets a car guy told me that if the leak down is good just do the springs.
1989mach1 is offline  
Reply
Old 01-22-2013 | 12:41 PM
  #34  
Registered
10 Year Member
 
Joined: May 2011
Posts: 3,313
Likes: 24
From: medina ohio/ vermilion ohio
Default

Originally Posted by riverrat
+ 100 ,keep us posted and pics.
Jeff A.
i will and i will take a camera with me this weekend when i go up to meet with him. and am going to have him save all parts changed. i am that guy that saves all the $hit and puts it on walls and what not .
1989mach1 is offline  
Reply
Old 01-22-2013 | 12:57 PM
  #35  
Registered
10 Year Member
 
Joined: May 2011
Posts: 3,313
Likes: 24
From: medina ohio/ vermilion ohio
Default

Originally Posted by cig20
this is some good reading and advice im having both test done leak down and compression
thanks for all advice will post results
Im glad that me takeing it from behind is helping you...
i might be rollin a canoe this year. lol maby some one can give me a pull to kelleys
1989mach1 is offline  
Reply
Old 01-22-2013 | 03:38 PM
  #36  
28Eliminator's Avatar
Registered
 
Joined: Dec 2001
Posts: 809
Likes: 0
From: Rapid City SD
Default

See what you find out this weekend. At 345 hours that motor should have a lot of life left in it. The leak downs at 20% when cold are not that accurate, but a good indication of no major problems. If you do anything with the heads, because you are half way into it, I would pull them to change head gaskets and do a quick valve job and springs to start off fresh.
28Eliminator is offline  
Reply
Old 01-22-2013 | 04:19 PM
  #37  
Registered
10 Year Member
 
Joined: May 2011
Posts: 3,313
Likes: 24
From: medina ohio/ vermilion ohio
Default

i mainly wanted to do the top end becouse merc has it to be done every 300 to 350 hours. pluse with buying used its better to be safe then sorry. u never know how the outher guy drove the boat, he keept it mint and only put 324 (now that i looked back) hours on it in 11 years. but thouse could be hard hours.
1989mach1 is offline  
Reply
Old 01-26-2013 | 01:29 PM
  #38  
Thread Starter
Registered
 
Joined: Feb 2004
Posts: 1,170
Likes: 0
Default

ok did both test
compression 145-150 on all
leakdown all good but 1 leaking air below number 2 plug
could be this be a head gasket or a cracked head?
cig20 is offline  
Reply
Old 01-26-2013 | 01:57 PM
  #39  
BUP
Banned
 
Joined: Jul 2011
Posts: 9,594
Likes: 45
From: Ft. Worth TX
Default

what was the leakdown #'s especially on # 2 just wondering since you hear air leaking around the head area.
BUP is offline  
Reply
Old 01-26-2013 | 02:14 PM
  #40  
Thread Starter
Registered
 
Joined: Feb 2004
Posts: 1,170
Likes: 0
Default

Originally Posted by BUP
what was the leakdown #'s especially on # 2 just wondering since you hear air leaking around the head area.
leak down was about 2to3 on all but number 6 not as i posted early number 2 on that on it was about 15 % motor was cold in building with temp about 40
cig20 is offline  
Reply


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

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.