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Old 07-25-2013, 10:57 PM   #1
AndreasChen
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Default Do I need to worry about oil pressure when using oversize oil filter?

I found if I put a dry PL20195 in, the first a few seconds after the oil change is terrible. Very noisy and a lot of crazy vibration. Looks to me the pump is having a hard time pushing oil through the filter.

If I soak the filter in advance it is way better.

Now I wonder: am I putting much more load on the oil pump by using a really fine and oversize oil filter? Should I switch to L20195 instead of PL20195? I do not want to kill the oil pump...

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Old 07-25-2013, 11:08 PM   #2
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

It's fine to use a larger filter. The noise is because the pump has to fill the filter before getting oil to the engine. Filling the filter before putting it on will help. Over the duration that filter is on, it will be much better for your engine than a smaller one as it filters out much smaller particles, provides better pressure, increases sump capacity, etc.

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Old 07-25-2013, 11:08 PM   #3
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

The oil pump can handle that filter fine. After your first start-up after the oil change, the oil filter will always be full of oil... the lack of oil in the filter on that first start-up was the cause of the noise. The reason this noise was more pronounced with the larger oil filter is that it took longer for it to fill with oil. Once it's full, though, it isn't any harder to pump oil through it than a smaller filter.

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Old 07-25-2013, 11:11 PM   #4
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Happy Re: Do I need to worry about oil pressure when using oversize oil filter?

I'll run a larger filter whenever I can locate one for a vehicle (or lawn equipment). But you really should pre-fill them. Some will argue it doesn't matter, but I say what does it hurt? It can only hurt if you don't.

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Old 07-26-2013, 12:08 PM   #5
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

Are we talking about Saturns similar to my 1.9l DOHC ones, with the filter mounted horizontal on the fire-wall side??? Not much you can do to get that filled before installing. Sure, you can get the element wet, but still a lot of air will be left in there. By the way, I put mine in dry and there is no unusual noise or vibration, the oil light just comes on for a second or two at first start.

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Old 07-26-2013, 12:20 PM   #6
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

Good to know there is no oil pressure concern. Thank you for all the input!

I found the excessive noise/vibration after putting in dry filter happens only to Purolator PureOne, for other filters it's fine. I like PureOne filters, so I will soak them before putting them in.

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Old 07-26-2013, 01:43 PM   #7
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

Well, there is another suggestion to use each time a new oil filter is replaced - remove the fuel pump fuse and use the starter. Cranking the engine without firing up allows the oil pump to fill the oil filter. Two, 5-second cranks of the starter should be more than enough to pump and fill the filter while pumping oil into the oil passages. Replace the fuel pump fuse and start up.

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Old 07-26-2013, 02:12 PM   #8
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

Quote:
Originally Posted by AndreasChen View Post
Good to know there is no oil pressure concern. Thank you for all the input!

I found the excessive noise/vibration after putting in dry filter happens only to Purolator PureOne, for other filters it's fine. I like PureOne filters, so I will soak them before putting them in.
Just fill them 1/2 full as they will spill while installing unless you are quick if filled full.

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Old 07-26-2013, 03:07 PM   #9
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

^ ^ ^ That's what I do.... fill the new filter 1/f full with fresh oil, undo the drain bolt, add more fresh oil to the new filter until it is 1/2 full again, since mose of what I poured in the first time is soaked away, then fill it again to 1/2 full before putting the new filter on

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Old 07-27-2013, 01:28 AM   #10
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Happy Re: Do I need to worry about oil pressure when using oversize oil filter?

^^^^^^ I do that as well. I don't lose much oil at all in the process. I do the same for our tractors and the larger bike, all of which have horizontal oil filters.

Otherwise do it like fdryer suggests. That's the common wisdom for the first crank-over of freshly rebuilt engines. Why wouldn't that be good at oil change times too? Do not ever start it "dry" if you can help it.

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Old 07-27-2013, 01:48 AM   #11
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

Quote:
Originally Posted by OldNuc View Post
Just fill them 1/2 full as they will spill while installing unless you are quick if filled full.
Yep! As long as I soak the filter wet, even if I pour a lot of oil out of filter, first start is still fine

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Old 07-27-2013, 07:35 AM   #12
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

With practice you can get the filter back on and not spill a drop from a full filter.

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Old 07-27-2013, 09:03 AM   #13
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

Quote:
Originally Posted by OldNuc View Post
With practice you can get the filter back on and not spill a drop from a full filter.
I do the oil only 3 times a year so the practice is very limited

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Old 07-27-2013, 09:27 AM   #14
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

That is why I suggested only filing with1/2 of the total capacity of the empty can. The filter element will soak up enough of the oil that you don't have spills and it will be mostly full when you start the engine.

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Old 07-27-2013, 10:47 AM   #15
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Default Re: Do I need to worry about oil pressure when using oversize oil filter?

Quote:
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^^^^^^ I do that as well. I don't lose much oil at all in the process. I do the same for our tractors and the larger bike, all of which have horizontal oil filters.

Otherwise do it like fdryer suggests. That's the common wisdom for the first crank-over of freshly rebuilt engines. Why wouldn't that be good at oil change times too? Do not ever start it "dry" if you can help it.
The 1 quart filter on my Trooper 2 is mounted upside-down and surrounded by engine wiring. O.E. filters have good anti-drain-back flappers.

Yesterday, I installed a dry K&N oversize filter and cranked the engine over with the "PCM B" fuse and spark plugs removed. The temporary oil pressure gauge started moving at about 10+ seconds total. (Temp gauge in the oil gallery plug adjacent to the end of the starter)

I usually dump some oil into a new filter.

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Old 07-27-2013, 10:58 PM   #16
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Happy Re: Do I need to worry about oil pressure when using oversize oil filter?

I have never owned a vehicle where it was completely upside down, but I have had several with "cartridge" filters (MBZ and BMW mostly, but the Cruze too), and a couple of them were sort of angled sideways off vertical.

Most of them have anti-drain valves in the filter housings so that you can put the dry cartridge in, fill the housing until the filter soaks up the oil and it almost overflows the housing, then put the cap on.

The cap pushes the cartridge down and opens the valve. The the air bubble purges out quickly but you do start up with a slug of oil. Works like a charm.

Other manufacturers have adopted that very same scheme in the past few years too, mostly on diesel truck engines but I am seeing it on their gasoline car engines now as well. Makes a lot of sense.

No manufacturer wants you to actually start the engine on a dry filter.....!

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