Go Back  Offshoreonly.com > Technical > General Q & A
502 mag light smoke >

502 mag light smoke

Notices

502 mag light smoke

Old 09-10-2018, 02:12 PM
  #1  
Registered
Thread Starter
 
Join Date: Sep 2018
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default 502 mag light smoke

Good afternoon everyone. To start off I would like to say this is my first time using a forum like this other than reading what other people have wrote so please do not bash me for my question. So I have a 2001 Baja 272 with a 502 mag right under 400 hours. This boat runs great idols great seems flawless in my eyes but I noticed light smoke coming from exhaust after running on the water. It eventually dies down and goes away but is always there after I'm under power. Thermostat says 160 and both risers seem so am I cool to the touch. Please help me figure out what may be the cause of this
Baja272stlmo is offline  
Old 09-10-2018, 03:01 PM
  #2  
Registered
iTrader: (1)
 
Join Date: Nov 2009
Location: KY
Posts: 3,884
Received 384 Likes on 300 Posts
Default

Don't see an issue, motor will always have some steam and after a run the motor is a tad hotter then just idling around. If the air temp is colder you will see more, warmer, will see less
AllDodge is online now  
Old 09-10-2018, 03:22 PM
  #3  
Registered
 
Join Date: Apr 2008
Location: Tampa, FL
Posts: 204
Likes: 0
Received 0 Likes on 0 Posts
Default

Sounds like valve stem seals. Mine were at the top of the stem before I redid my heads. These were stock 088 heads. A compression test wouldn't be a bad idea as well.
CJSYD is offline  
Old 09-10-2018, 03:53 PM
  #4  
Registered
Thread Starter
 
Join Date: Sep 2018
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

ok, even when it was 100 degrees out it was the same as when it was 90. As far as valve stem seals, if they go bad is that going to cause major damage, is this something that can be checked or diagnosed? This weekend plan was to dona compression check
Baja272stlmo is offline  
Old 09-10-2018, 04:00 PM
  #5  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 13,028
Received 2,596 Likes on 1,148 Posts
Default

Steam(white)
oil (blue or grayish)
fuel (black)
SB is offline  
Old 09-10-2018, 04:04 PM
  #6  
Registered
Thread Starter
 
Join Date: Sep 2018
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

It is definitely between gray and white, will a compression test lead to the diagnosis of this?
Baja272stlmo is offline  
Old 09-10-2018, 05:09 PM
  #7  
Platinum Member
Platinum Member
iTrader: (6)
 
F-2 Speedy's Avatar
 
Join Date: May 2012
Location: Midwest & T-Rock
Posts: 9,582
Received 2,163 Likes on 1,000 Posts
Default

@ 400 hrs it could possibly start using a little oil, can you tell if its coming out both banks ? Id do a leak down test and keep an eye on the oil level
F-2 Speedy 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 - Do Not Sell or Share My Personal Information

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.