Go Back  Offshoreonly.com > Technical > General Q & A
A little bit of moisture under Oil filler cap common? >

A little bit of moisture under Oil filler cap common?

Notices

A little bit of moisture under Oil filler cap common?

Old 08-15-2010, 10:54 PM
  #1  
Registered
Thread Starter
 
Join Date: Jun 2004
Location: Sun Prairie, WI
Posts: 1,128
Likes: 0
Received 13 Likes on 9 Posts
Default A little bit of moisture under Oil filler cap common?

Boat has been sitting for about 4 hours since running it hard today. Oil temps were above 200 most of the day. Was checking fluids and such and check the breather hoses and oil filler cap. There was a little bit of moisture under the cap, is this normal after sitting. Checked the breather hoses as well, didn't see any moisture there. Just the cap. I'm fairly confident that while running there is no moisture, but wasn't sure if after it sat for 4 hours or so if some moisture under the cap would be normal??
cloudmaster_321 is offline  
Old 08-15-2010, 11:29 PM
  #2  
Registered
 
Join Date: Jul 2007
Location: San Diego
Posts: 988
Likes: 0
Received 2 Likes on 1 Post
Default

It's pretty normal. Just burning off the condensation in the oil.



Darrell.
DMOORE is offline  
Old 08-16-2010, 12:30 PM
  #3  
Registered
Thread Starter
 
Join Date: Jun 2004
Location: Sun Prairie, WI
Posts: 1,128
Likes: 0
Received 13 Likes on 9 Posts
Default

I guess it surprised me a bit when I saw it, figured after a day of running upwards of 220 degrees at times, it would be dry as a bone. Just didn't know what would happen when it starts to cool back down.........
cloudmaster_321 is offline  
Old 08-16-2010, 01:26 PM
  #4  
Registered
 
Join Date: Apr 2010
Posts: 549
Received 0 Likes on 0 Posts
Default

Unless you have a PCV system, not all of the water will be purged.

Some of the water (in the form of vapor) will remain in the engine since there is no positive draft in the crankcase & valve covers. Although blowby does come out of the draft tubes at all times, blowby contains water vapor so the vapor is never really removed.

The PCV system pulls more air through the engine than there is blowby, eliminating condensation. I had this same issue until I installed a PCV system.

FWIW, I doubt the small amount you are seeing is an issue, however.
apollard is offline  
Old 08-16-2010, 02:30 PM
  #5  
Registered
Thread Starter
 
Join Date: Jun 2004
Location: Sun Prairie, WI
Posts: 1,128
Likes: 0
Received 13 Likes on 9 Posts
Default

I do have a Pcv on one side going to the intake. I talked to Eddie at Young Performance about this as well. He says it's normal as well. It was explained to me due to the block being cooled at 160 degrees, the temperature difference will have some condensation. I guess if my breather hoses had moisture like I had before my reversion issues, i'd be more worried. I used to be able to get about half a teaspoon of water out of the breather hoses, not anymore. Just the couple of droplets under the oil cap.
cloudmaster_321 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.