SailNet Community - Reply to Topic
Thread: slight oil slick in diesel engine exhaust Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

  Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below

  Topic Review (Newest First)
04-04-2013 02:15 AM
Re: slight oil slick in diesel engine exhaust

Can't believe you just answered a 3-year old answer to a 9-year old post.
04-04-2013 01:15 AM
desert rat
Re: slight oil slick in diesel engine exhaust

check the compression, check if the rocker arm bushings are worn wobble excessively. Low compression or worn rockers replace engine. Sorry.
04-15-2010 12:54 PM
klem Whoops. Thanks for catching that SD. I only looked at the time of the post above mine, not the OP.
04-15-2010 12:43 PM
sailingdog Guys—

If he still has an oil problem, he's created a slick the size of the one the Valdez left behind, since he was posting in 2004.
04-15-2010 12:03 PM
klem Yes, that oil consumption is very high. I do not believe that an MD17 has an oil cooler but I may be mistaken. I would check your waterpump to start with. Is there anything coming out of the weep hole? Are you sure that there is no water in your oil? There is usually contamination both ways which will slowly turn your oil milky white.
04-15-2010 11:33 AM
Dumah That oil consumption is way too high, suggest you have a leak in the lube oil cooler or raw water pump. Either way,I would be investigating and curing before the engine itself starts inhaling water. Not familiar with that particular engine, but usually there is an oil passage to the head that relies on the head gasket for sealing, if the engine is "dry" at rest (water drains back after running) it could possibly be the head gasket.

Hope this helps,
Cheers, Dumah
Halifax, NS
10-18-2004 12:28 PM
slight oil slick in diesel engine exhaust

This from a google search cuz I was curious, I can claim very little knowledge on my own:

Symtom:Unburned engine oil in exhaust:
1)Leak in oil cooler.
2)Bad shaft seal on raw water pump.
3)Could be fuel, not oil ?

This from the site:
10-18-2004 11:04 AM
slight oil slick in diesel engine exhaust

I have a Volvo Penta MD17D (3 cylinder 36HP raw water cooled diesel) that is running perfectly except it is consuming approx one quart of engine oil per 20 hours of operation. The oil in the crank case is clean (not the usual black I would expect from a diesel Ė no sign of any water intrusion) and the engine always starts first time (without any glowplugs) so I know compression is good. This would suggest (at least to me) that since there is no water leak into the crankcase or soot being deposited (engine oil is not turning black) I donít have piston ring wear or head gasket leak. However I do observe a very slight oil slick in the cooling water discharge in the exhaust. My question is where is the likely oil consumption leak? Could it be something as simple as a leaking seal in the water pump shaft allowing crankcase oil to enter the cooling system (but not the other way round). Any suggestions as to what I should look for. The engine is 20 years old (donít know the engine hours).

Posting Rules  
You may post new threads
You may 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 On

For the best viewing experience please update your browser to Google Chrome