Notices
O.S. Engines Support Ask Bill Baxter your questions about O.S. Engines.

os 48 compression loss

Old 10-19-2003, 07:45 PM
  #1  
Thread Starter
My Feedback: (15)
 
Join Date: Jan 2002
Location: Rib Lake, WI
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default os 48 compression loss

Bill:

I experienced compression loss on an os 48. It came on suddenly.
It must be related to the intake valve not closing. With the valve cover off, if I add finger pressure to the push rod side of the rocker arm (I hope that's what it's called), compression is restored. This may last through several manual rotations, quite a few if you do not tip the engine from the vertical. Tipping the engine triggers compression loss.

Something in the cam???? (This engine has 13 seasons of use). Thanks for your time.
Old 10-20-2003, 10:25 AM
  #2  
Bax
My Feedback: (11)
 
Join Date: Apr 2002
Location: Monticello, IL
Posts: 19,483
Likes: 0
Received 6 Likes on 5 Posts
Default RE: os 48 compression loss

You'd have to disassemble the engine to see what's wrong. A cam follower could be sticking, the valve stem could be sticking, you could have a broken valve springs, and so on. Only a disassembly and careful look will answer the problem.


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 On


Thread Tools
Search this Thread

Contact Us - Manage Preferences 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.