Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-24-2017, 06:57 AM   #1
Newbie
 
baycoaster's Avatar
 
Join Date: Feb 2014
Posts: 2
Oil in Lehman engine coolant

I have found oil(about a half pint) in my coolant on my Lehman engine. Ruled out oil cooler leak (Raw water). Engine runs fine, no sign of coolant in oil.
Will it harm engine to run?
Need help!!!
__________________
Advertisement

baycoaster is offline   Reply With Quote
Old 10-24-2017, 07:09 AM   #2
Senior Member
 
TowLou's Avatar
 
City: Flanders, NJ
Country: USA
Vessel Name: Bassey
Vessel Model: 17' Bass
Join Date: Aug 2016
Posts: 187
Oil in coolant is no good. Means your oil level is going down and more then likely you will need to do a head gasket.
__________________

TowLou is offline   Reply With Quote
Old 10-24-2017, 07:54 AM   #3
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 8,009
Quote:
Originally Posted by baycoaster View Post
I have found oil(about a half pint) in my coolant on my Lehman engine. Ruled out oil cooler leak (Raw water). Engine runs fine, no sign of coolant in oil.
Will it harm engine to run?
Need help!!!
Have it professionally evaluated, starting with pulling the heat exchanger and having it pressure tested. Hopefully it ends there. Btw, how did you determine there is half a pint of oil in your coolant? Oh, it is indeed harmful to run your engine for very long this way, not knowing where the possible bomb is lurking.
sunchaser is offline   Reply With Quote
Old 10-24-2017, 07:58 AM   #4
Guru
 
Cigatoo's Avatar
 
City: Narragansett Bay
Country: New England
Vessel Model: Grand Banks 36
Join Date: Sep 2016
Posts: 778
Oil in your coolant is better than coolant in your oil but it still shouldnít be there. You can run it but should be checked sooner rather then later. The starting point is to Pressure test the coolant system to see if it will hold.
Cigatoo is offline   Reply With Quote
Old 10-24-2017, 08:49 AM   #5
Guru
 
kapnd's Avatar
 
City: hawaii
Country: usa
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 537
Quote:
Originally Posted by sunchaser View Post
Have it professionally evaluated, starting with pulling the heat exchanger and having it pressure tested. Hopefully it ends there. Btw, how did you determine there is half a pint of oil in your coolant? Oh, it is indeed harmful to run your engine for very long this way, not knowing where the possible bomb is lurking.

OP has already ruled out oil cooler, and the heat exchanger does not interface coolant/oil, only raw water/coolant.
My first guess would be head gasket leak too.
I'd consider the problem to be a high priority item, as leaks tend to grow over time and with use.
__________________
You can lead a horse to water,
But you can't make him ski...
kapnd is offline   Reply With Quote
Old 10-24-2017, 09:12 AM   #6
Guru
 
High Wire's Avatar
 
City: Cape May, NJ and Englewood, FL
Country: USA
Vessel Name: Irish Lady
Join Date: Dec 2007
Posts: 2,787
Is this Lehman 120, 135, or turbo?
__________________
Archie
1984 Monk 36 Hull #46
Currently southbound in Chesapeake Bay
High Wire is offline   Reply With Quote
Old 10-24-2017, 11:17 AM   #7
Guru
 
psneeld's Avatar
 
City: AICW
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 19,811
My oil and bubbles in coolant was the beggining of a head gasket failure. Maybe an ounce over several years and 2800 hrs of running.

Engine seemed fine, but after head gasket replacement this summer, starts are a touch faster though not bad before.

The machine guy pointed out the very beginning of the failure...I just barely noted the differences.

I was not retorquing regularly, now I will.
__________________

psneeld is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off





All times are GMT -5. The time now is 12:55 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×