djleu
Veteran Member
- Joined
- Apr 29, 2011
- Messages
- 31
- Location
- US
- Vessel Name
- Change of Latitude
- Vessel Make
- 2005 GB 42 Classic
We have twin 600685SFM Deere Engines with approximately 3,000 hours. For the past several years, the starboard engine has given up a black sludgy substance that coats the plastic coolant overflow container. Twice we have had the coolant system flushed, once as long as 7 hours. Once we pulled and replaced the coolant overflow container. Each year we conduct an oil analysis as a regular procedure on our boat. Everything in the oil analysis is nominal and has been each year. No evidence of water has ever shown up. An analysis of the sludge in the coolant container indicates that it is oil. The puzzle:
How the heck can oil get into the coolant system without any coolant or water getting into the oil system?
Thanks for any ideas!
Cheers,
Don
How the heck can oil get into the coolant system without any coolant or water getting into the oil system?
Thanks for any ideas!
Cheers,
Don