Yes, it will run dry until the pump fills the filter, but you would be surprized how long it takes to fill a filter , not very long.

The minimal amount of time that your engine would spend with no oil pressure , is nothing compared to the damage done if a piece of dirt is intoduced on the clean side of the filter , and plugs , say , a piston cooling nozzle...

 

I do pre-fill (about 5/8 to 3/4) my oil filter. I also acknowledge that doing it is the most opportune time for me to accidentally contaminate my engine with foreign debris.

I would suspect there is not much difference in starting an engine that has been stored for a few weeks than starting one with an empty filter (delay wise).

Could be wrong though.

 

Well, the oil filter will stay filled after engine shutoff indefinitely due to gravity.

There is a noticeable difference in oil pressure gauge registration between prefilling and starting with a dry filter. I always prefill (being mindful of those pesky foreign materials), and teach others to do the same; last oil change, however, my boy forgot to prefill and I watched for what seemed like an eternity for the oil pressure to reach 5psi He felt bad about it (sorry son ) until I told him the mighty Cummins could take it in stride...

 

They don't stay full on my 12 valves at least. When I change oil I usually leave it drain overnight. In the morning when I go to remove the filter it's only about half full. Leads me to believe the oil siphons back out of the filter anytime the engine isn't running.

 

My CR stays full enough that you have to keep the filter within 15-20 degrees of vertical or it'll spill... we wrap a plastic bag around it first, cause that's about how much you have to tip it to get it down through to the bottom of the truck.

 

Whatever you add is outside the filter. The first thing to run thru the new filter is whatever gets into the bowl first. That being said, I just prime it with the lift pump per the owners manual.
Mike
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I also prime my canister with the LP. I do not add anything to the canister.
I will have to add a valve or something up near the engine when I put the spin-on filters in. Unless I put a valve between the filters and the engine. I already have one between the tank and the LP.
I'll have to think about that.

 

I prefer to pre-fill mine to keep everything wet and as air free as possible.
Filling it with the lift pump still gives you about a quart of air to try to get rid of and an air bubble from the bottom hole of the tube to the filter housing top.

 

FYI, the 2006 Dodge owners manual tells you to fill the oil filter with oil before you insatll it or damage can happen. I have always filled my oil filter before I put it on (I even do it on my car) and will do so until such time Cummins gives me a dam good reason not to do it.

 

I allways fill my filters, both fuel and oil. A little common sense go a long way in watching what you pour into your filters though. About 20 years ago I had a perfectly good running engine ( Isuzu D201 ) spin a rod bearing before it filled the filter back up after a PM. I have filled the filters when possible ever since. I can tell you from many years of experience that I have never seen an engine damaged from filling the filters. The newer and tighter a engine is, the more likely it is to suffer damage from a dry start. I've also seen old worn out engines that would run without oil and never miss a lick.

 

So are you supposed to drain the fuel out of the fuel filter container first? I haven't been, just been pulling the filter out and put a new one in and go. (with new O-ring of course.

 

I just open the petcock and empty it... that's about the only time I drain the water out

 

I read that a lot of people are doing it that way??? I just open the valve for a second or two, I then submerge the new filter in what is left in there.

From the way I read it lately, that is incorrect?

 

I usually crack a few injector lines or use the priming pump on the filter. There is no non-red diesel around here to fill the filter anyway.

I always fill the oil filter before installing it. Thats the way that I have been taught by everyone. When doing an oil change on our JD tractors or any machine with a fuel shutdown cable, I turn off the fuel and crank the engine until the oil press gauge moves instead of filling the filter(since the JD engines have a horizontal pump, I couldn't fill them anyway).

 

I was going to do that the first time I changed my oil filter but my dad said "no it'll fill by itself." I thought I should be putting some oil in it first.