Oil change Question?
Thread Starter
|
Junior User
Joined: Oct 2005
Posts: 76
Likes: 0
From: Adairsville,Ga
Oil change Question?
When changing the oil, why doesn't the oil in the high pressure pump drain? All your doing is mixing old oil with good. Is there a way to drain this old oil out of the pump?
Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
If the oil drains out of the pump you likely will lose prime in the pump and have a hard time bringing up oil pressure on start up.
If you have a straight six and room by the oil filter mount, you can purge that by an oil squirt can. With the filter off and drain plug out, squirt several ounces into the oil outlet at the filter mount. It is not the center tube, but the hole in the block between the center tube and the filter gasket mating surface. This method also works to restore oil pump prime.
A little dirty oil left in the engine is not a problem. If one tenth of the capacity is old oil, then your oil is dirtier than that 90 percent of your miles (that is, the tenth mixed with clean oil represents 300 miles of use on a 3000 mile OCI). So, not to worry, it is going to get dirtier than that soon anyway, so it doesn't really matter.
If you have a straight six and room by the oil filter mount, you can purge that by an oil squirt can. With the filter off and drain plug out, squirt several ounces into the oil outlet at the filter mount. It is not the center tube, but the hole in the block between the center tube and the filter gasket mating surface. This method also works to restore oil pump prime.
A little dirty oil left in the engine is not a problem. If one tenth of the capacity is old oil, then your oil is dirtier than that 90 percent of your miles (that is, the tenth mixed with clean oil represents 300 miles of use on a 3000 mile OCI). So, not to worry, it is going to get dirtier than that soon anyway, so it doesn't really matter.
Thread Starter
|
Junior User
Joined: Oct 2005
Posts: 76
Likes: 0
From: Adairsville,Ga
Thank you for the help. Also would like know if you've tried using SeaFoam motor treatment while doing oil change? Also, L've been told that Lucus oil additives are not good for diesel engines,due to fact that they make the oil become thicker. I've been told to change to Schaeffer oil additives. What do you think?
Thread Starter
|
Junior User
Joined: Oct 2005
Posts: 76
Likes: 0
From: Adairsville,Ga
The truck is a 7.3 Powerstroke diesel with 230,000 miles.The truck does not burn excessive oil. I had gotten water in the diesel causing 3 of the injectors to get plungers to become scored. I ran lucus products on regular basis. When they rebuilt the injectors they went to install them and noticed that the oil in the the valve cover was black ,thick and sticky. They told me it was in my best interest to stop using the Lucus additive in the oil. They mentioned that the SeaFoam would be okay to use. It would help clean any build up.
Have never had any problems with this engine, until the water in diesel incident. I am the second owner of the truck and do routine regular maint on it. I use Rotella 15W-40. Change oil and filter every 3000 miles.This is a must since I use the truck to haul with. Could it be that the Lucus has been good on the engine afterall? Would appreciate your comments on this.
Have never had any problems with this engine, until the water in diesel incident. I am the second owner of the truck and do routine regular maint on it. I use Rotella 15W-40. Change oil and filter every 3000 miles.This is a must since I use the truck to haul with. Could it be that the Lucus has been good on the engine afterall? Would appreciate your comments on this.
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 7,298
Likes: 45
From: Southern California
I wouldn't use any additive at all. Let the Rotella do the job it was designed for. It doesn't need any help from additives. If you have the owner's guide for your truck it will even tell you Do Not Use Motor Oil Additives.
Thread
Thread Starter
Forum
Replies
Last Post
genscripter
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
3
Apr 5, 2015 10:10 PM
