Learned Lesson...Prefill Oil Filter

[George7941]

Originally Posted By: Chris142
Originally Posted By: rg200amp





I know some of those big diesel truck have filters that hold 1-2quarts!!!!
Umm try gallons!
http://www.wixfilters.com/filterlookup/PartDetail.asp?Part=57745XD


Theres no way to prefill my filter. It takes about 12 seconds to get pressure with a new filter.




Would this filter be a bypass filter and not a full-flow filter? Wix rates this filter at 5 microns, I would think a full-flow filter would clog up if it filtered that finely.

My 2006 Sierra Wix filter is rated at 19 microns.

 

[crinkles]

Originally Posted By: George7941
Originally Posted By: crinkles
would prefilling lube the thread of the filter where it screws onto the engine block, making it more likely to vibrate off?



Two posters have had fun with this already. Let me be the one to actually address this concern. Most of the friction keeping the filter in place comes from the rubber seal, not the metal threads. The rubber, even when wiped with oil before installation, generates a lot of friction, so the danger of a properly tightened filter loosening is nil. The rubber is designed to swell a bit and that generates even more friction.


thanks! i knew it was a silly question but I had to ask,...

 

[artificialist]

I have worked with several full ton pickup trucks, and every time they come into the shop, I get told to prefill the filter, so I do.

I am always told that not prefilling those filters is extremely bad for the turbocharger.

 

[demarpaint]

I prefill my filters, and see no reason why I shouldn't. I can't imagine the oil coming from a fresh qt container is any dirtier than the oil in the drain pan that's been used in the engine for the past 6 months. Besides start up noise would really bother me.

Frank D

 

[George7941]

Demarpaint. You are overlooking one point. The oil from the oil pan of your engine gets filtered before it goes into the internals of the engine whereas if any dirt gets in during prefill, it will not be filtered out before it is sent into the engine internals. So prefilling has to be done very carefully to avoid any dirt ingestion.

Caterpillar actually put out an advisory against prefilling precisely because sloppy work habits led to dirt in the oil that was used for prefilling.

 

[demarpaint]

I understand what you're saying. When I prefill the filter I open a fresh qt and pour the oil into the filter, close the box so no dirt gets in until I install the filter. The oil in the pan after 6 months is far more dirty, and loaded with combustion bi-products. I would think the oil producers have some QC in making and packaging the product so that it's reasonably clean.

JMO,
Frank D

 

[daves66nova]

Originally Posted By: George7941
Originally Posted By: crinkles

The rubber is designed to swell a bit and that generates even more friction.
oh, you mean the rubber o-ring? lol