Go Back  Offshoreonly.com > Technical > General Q & A
Low oil psi 454 500HP >

Low oil psi 454 500HP

Notices

Low oil psi 454 500HP

Old 05-08-2011, 01:47 AM
  #51  
Registered
 
Join Date: Mar 2009
Location: OFallon,Mo.
Posts: 1,758
Likes: 0
Received 3 Likes on 2 Posts
Default

bt and Boat1. He said all the old bearings were marked .010" under, not .001". Apperantly at one time the crank was ground .010" under size on the rods and mains which is typical. He was using standard size bearings at first so he had an additional .010" clearance. Therefore had low pressure as the oil flushed out the excess clearance. Now he has changed to the correct .010" undersize bearings and oil pressure has returned to normal due to now having .010" less clearance than he had with the standard bearings.

He's lucky he didn't spin one.
picklenjim is offline  
Old 05-08-2011, 08:59 AM
  #52  
Registered
 
Join Date: Feb 2009
Posts: 319
Likes: 0
Received 0 Likes on 0 Posts
Default

My bad. Everything I said about checking the clearances and end play still applies.
Boat1 is offline  
Old 05-08-2011, 12:02 PM
  #53  
Registered
 
Join Date: Mar 2009
Location: OFallon,Mo.
Posts: 1,758
Likes: 0
Received 3 Likes on 2 Posts
Default

Originally Posted by Boat1
My bad. Everything I said about checking the clearances and end play still applies.
Totally agree with your routine for checking clearances before final assembly. I do believe though that a large percentage of people just take it for granite that everything is right and the machine shop couldn't make a mistake so they just put everything together with out checking. You could even get a bearing that was packaged wrong and not catch it. Definitely worth the time to check clearances closely before final assembly. I always check end play but don't remember ever having a problem there.
picklenjim is offline  
Old 05-08-2011, 04:00 PM
  #54  
Registered
 
blue thunder's Avatar
 
Join Date: Nov 2001
Location: Pennsylvania
Posts: 3,385
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Boat1
My bad. Everything I said about checking the clearances and end play still applies.
ditto. I was thinking .001. Its suprising it had any OP with .010 clearance all around.
blue thunder 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.