Milky oil, 7.4 Merc
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Milky oil, 7.4 Merc
Hey Guys...
I have a 2000 7.4 Merc. MPI. I did an oil change to start off my season this year and noticed a bit of a milky color to the oil. I did an oil change and it was still there but seemed to be less (or so I hope). I changed it again and there is still a trace. No water is getting to cylinders and she seems to be running strong. In my mind there can only be a couple of things that could cause water in crank case and not up top.
First off is the one I dont want to hear and that is a cracked water jacket in block.
Second I thought maybe oil cooler but wouldnt I then also see oil in exhaust water. I changed the cooler once a few years ago cause oil was spewing out of my exhaust.
Third I guess could be a head gasket or manifold problem but wouldnt I then also have water in cylinders?
My first thought was that it is just condensation but then wouldnt 2 oil changes take care of that. So far I have only run her on ear muffs this year.
Engine has a lot of hours on it and owes me nothing... I am thinking that if this is something major then I am just gonna run it till it blows up then go for repower next year.
Your thoughts much appreciated.
Thanks
I have a 2000 7.4 Merc. MPI. I did an oil change to start off my season this year and noticed a bit of a milky color to the oil. I did an oil change and it was still there but seemed to be less (or so I hope). I changed it again and there is still a trace. No water is getting to cylinders and she seems to be running strong. In my mind there can only be a couple of things that could cause water in crank case and not up top.
First off is the one I dont want to hear and that is a cracked water jacket in block.
Second I thought maybe oil cooler but wouldnt I then also see oil in exhaust water. I changed the cooler once a few years ago cause oil was spewing out of my exhaust.
Third I guess could be a head gasket or manifold problem but wouldnt I then also have water in cylinders?
My first thought was that it is just condensation but then wouldnt 2 oil changes take care of that. So far I have only run her on ear muffs this year.
Engine has a lot of hours on it and owes me nothing... I am thinking that if this is something major then I am just gonna run it till it blows up then go for repower next year.
Your thoughts much appreciated.
Thanks
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fixx
Hey Guys...
I have a 2000 7.4 Merc. MPI. I did an oil change to start off my season this year and noticed a bit of a milky color to the oil. I did an oil change and it was still there but seemed to be less (or so I hope). I changed it again and there is still a trace. No water is getting to cylinders and she seems to be running strong. In my mind there can only be a couple of things that could cause water in crank case and not up top.
First off is the one I dont want to hear and that is a cracked water jacket in block.
Second I thought maybe oil cooler but wouldnt I then also see oil in exhaust water. I changed the cooler once a few years ago cause oil was spewing out of my exhaust.
Third I guess could be a head gasket or manifold problem but wouldnt I then also have water in cylinders?
My first thought was that it is just condensation but then wouldnt 2 oil changes take care of that. So far I have only run her on ear muffs this year.
Engine has a lot of hours on it and owes me nothing... I am thinking that if this is something major then I am just gonna run it till it blows up then go for repower next year.
Your thoughts much appreciated.
Thanks
I have a 2000 7.4 Merc. MPI. I did an oil change to start off my season this year and noticed a bit of a milky color to the oil. I did an oil change and it was still there but seemed to be less (or so I hope). I changed it again and there is still a trace. No water is getting to cylinders and she seems to be running strong. In my mind there can only be a couple of things that could cause water in crank case and not up top.
First off is the one I dont want to hear and that is a cracked water jacket in block.
Second I thought maybe oil cooler but wouldnt I then also see oil in exhaust water. I changed the cooler once a few years ago cause oil was spewing out of my exhaust.
Third I guess could be a head gasket or manifold problem but wouldnt I then also have water in cylinders?
My first thought was that it is just condensation but then wouldnt 2 oil changes take care of that. So far I have only run her on ear muffs this year.
Engine has a lot of hours on it and owes me nothing... I am thinking that if this is something major then I am just gonna run it till it blows up then go for repower next year.
Your thoughts much appreciated.
Thanks
if its a salt water engine then i would tear the engine down and inspect..
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if i were to guess first check the 4 corners of the 8 intake bolts to see if they are loose,,take a wrench and tighten them..my second guess would be the oil cooler and yes their should be some oil in the water when fired..it eill leak into the oil system when the engine is off then mix when the engine is fired.
if its a salt water engine then i would tear the engine down and inspect..
if its a salt water engine then i would tear the engine down and inspect..
Thank you for your help.
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only on a hose so far this year. you didn't get all the water out. you can never get it all. it will boil out when oil gets hot enough, can't do that in driveway. use it. if it starts getting worse, you neeed to worry. but you mentioned 1500 hours salt raw water cooling in another thread. someday in forseeable future, you will need to worry...
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only on a hose so far this year. you didn't get all the water out. you can never get it all. it will boil out when oil gets hot enough, can't do that in driveway. use it. if it starts getting worse, you neeed to worry. but you mentioned 1500 hours salt raw water cooling in another thread. someday in forseeable future, you will need to worry...
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Thanks for your input though.