Long time
- Thread starter NewToy
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awlchu
Gold Member
</font><font color="blue" class="small">( I always hate starting the vehicle right after an oil change. It seems like an eternity until that oil pressure guage springs to life.
John )</font>
I usually run the engine to op temp before changing the oil. There is enough film on the bearing surfaces to survive the few seconds of running "dry".
Yea, Wouldn't it be nice for a pressurized oil system prior to starting your engine?
John )</font>
I usually run the engine to op temp before changing the oil. There is enough film on the bearing surfaces to survive the few seconds of running "dry".
Yea, Wouldn't it be nice for a pressurized oil system prior to starting your engine?
OP
NewToy
Veteran Member
I always used to fill the filter up as well until I saw the notation in my manual NOT to fill it up. That's on my 1999 F250 w/Powerstroke engine. I wonder why they don't want you to pre-fill the filter?
John
John
RodgerF
Silver Member
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I don't know, I don't think I've ever seen anything advising against it. It would be interesting to find out why they recommend not to.
Bates
Bronze Member
The only way an engines starts "dry" is if it was assembled dry. Even after an oil change, the parts are still flooded with oil.
If you were to take the cap off of a connecting rod in an engine that sat for years, the bearing would still be wet with oil.
In the automotive world, they talk about the equivalent of 500 miles worth of wear happening each time an engine is cold started. If that were the case, an engine would be toast after about 400 cold starts. I think it's B.S........It may have been true with older engines and older oils, but it isn't true anymore.
Lack of oil pressure doesn't mean lack of lubrication if its only for a brief moment upon startup.
If you were to take the cap off of a connecting rod in an engine that sat for years, the bearing would still be wet with oil.
In the automotive world, they talk about the equivalent of 500 miles worth of wear happening each time an engine is cold started. If that were the case, an engine would be toast after about 400 cold starts. I think it's B.S........It may have been true with older engines and older oils, but it isn't true anymore.
Lack of oil pressure doesn't mean lack of lubrication if its only for a brief moment upon startup.
midlf
Platinum Member
Even a new engine should not be dry. I have a tool to spin the oil pump (Chevy) before starting a newly rebuilt engine. Gets the oil everywhere before the first fire. (It should also be assembled with assembly lube.)
I guess you could disable the pump on a diesel or on a gas motor and crank the motor with the starter until oil pressure is established. I do that on engine jobs that I can't prelube or crank the oil pump drive manually. Pre filling the filter works to help speed oil pressure as other posters stated.(I do both on an engine replacement) I have seen engine oil pressurizing units but I wouldn't buy one unless I was doing a lot of very expensive engine builds.
QueBota
Gold Member
If you get any contaminates inside the filter when filling it they head directly for engine interior. The side of the filter you are filling is the "clean" side. Cummins has had some problems with clogged piston jets from the foil seals on gallon oil jugs.
Dave
Dave
OP
NewToy
Veteran Member
That makes sense. I hate those darn foil things. I have dropped one into the jug myself, had to get momma's nice kitchen strainer and put it in my funnel. I'm glad she didn't catch me using it in the garage. /forums/images/graemlins/smile.gif
