Just a question.
As you know any crap that gets into your oil filter will go directly into the engine oil galleries and piston cooling spray nozzles with possible disastrous results.
Does anybody know what Cummins says about prefilling your filters on oil change?
I am thinking that it may not be such a good idea.
I can't imagine it takes that much longer to fill the filter and build pressure on the initial start up.
What are your thoughts?

 

id say fill it!!

brett

 

definately fill it! If where you are working is sooo dirty that you are scared of getting anything in your filter , then pay a shop to do it!

 

Fill The Filter !!! Most Definitely !!!

 

Just remember to have a very clean funnel and all the foil is removed from the oil containers (if present). That's the clean side of the filter that the oil is being poured in.

MikeyB

 

Fortunately the filter is placed in vertically, and I usually put about a quart in the new filter before I put it on.

 

I've always filled mine from a quart jug directly.

 

Why even use a funnel? Pour directly from teh 1 gallon jug into the filter. I normally set 3 gallons out, fill up the filter as much as it will take & dump the rest into teh crankcase. That way I don't have to measure how much went in teh filter - the engine always get exactly 12 quarts!

 

Toto, put engine oil in the filter. If there is anything that gets into the oil its still better than no lubrication at all while the filter is filling up with the engine idling. When the filter goes on empty, that trapped air has to be evacuated somewhere, rods,mains, camshaft bearings, rocker shafts...etc All current production engines have bearings that have excellent imbedability, meaning they can take a little pollen of a particle of dust or two... Anything is better than a dry-start condition. Even if you have recently ran the engine before the oil change, the air has to purge itself out before a column of oil will get there.

 

I always fill mine and let it sit for several min. to absorb the oil then go back and do it again untill no more will go in. I do this while I'm fighting to find the front driveshaft lube point and inspecting other items and letting the oil drip from the oil pan. Just remember the key to almost any type of repair or maintenence is to be very clean or atleast as clean as possible.

 

Definatly.

 

ALWAYS fill the filter. It takes a little while to get the air out, BUT ALWAYS fill the filter. That is one of the main reasons I'm the only one that changes my oil. You can bet some guy at the five minute oil change won't take the time. edit five or ten minutes ain't enough time to drain the oil.

 

I alway's pre-fill, but just out of habit. Techs has always told me it doesn't matter, they even seemed to look at me funny when I asked them. They said 40psi of high volume flow fills the filter in 2 seconds and the motor could care less either way. It's seems like either way works, but if you like a little assurance, fill it first.

 

These Techs arn't too smart. Filling the filter is one thing, getting the air through the system is another. Like said before, air trapped in the mains, journals, cam areas, etc. is what kills things. Oil pressure and oil volume are completely different things, and untill the air is purged out you don't have the needed volume.

 

I was in a hurry when I did my last oil change and forgot to fill the filter. While filling the crankcase, I realized that I had forgotten, so I prayed that it wouldn't run very long before it built up oil pressure. Once I started it up, the gauge didn't even hesitate to get up into the normal range.