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Old 12-14-2019, 01:23 PM   #81
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I think the upside down issue was more about running the engine with no or limited oil flow for a short period rather than the mess while changing the filter.
Filters have a check valve that prevents emptying when an engine turns off. That is why holes must be punched to release the vacuum to allow them to drain by gravity.
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Old 12-14-2019, 01:25 PM   #82
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Filters have a check valve that prevents emptying when an engine turns off. That is why holes must be punched to release the vacuum to allow them to drain by gravity.
Yes, as long as you get one with a check valve! As mentioned above some have dubious valves...or none...
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Old 12-14-2019, 03:41 PM   #83
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Yes, as long as you get one with a check valve! As mentioned above some have dubious valves...or none...
Few filter models do not have check valves but, hey, just ensure you get one that has. It's really not difficult to do so. Some with dubious check valves? Which?
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Old 12-14-2019, 05:46 PM   #84
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Few filter models do not have check valves but, hey, just ensure you get one that has. It's really not difficult to do so. Some with dubious check valves? Which?
Haven't a clue but I believe it was mentioned in the beginning of the thread. I have been using Mobile 1 fliters and have them installed "upside down". Flipping them isn't high on my list of things to do right now although I guess I can see the benefit. I shy away from changing things that have served the boat well for the 32 years before I got it. It knows more than I do by far if you know what I mean. It doesn't need me coming in and screwing around with things!
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Old 12-14-2019, 06:03 PM   #85
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Remounting the oil filter right end up is a simple project that you do once.

No more punching holes and waiting for the oil to drain out.

And the filter can be prefilled prior to install.

The filter is always full of oil at start up when oriented correctly.
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Old 12-14-2019, 06:25 PM   #86
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Getting off the track of CAV filters but my Perkins oil filter is upside down, has internal check valve, and still drains completely empty overnight. Oil samples over the past five years show NO unusual wear. My boat sits all summer in Florida and gets it’s first startup of the season hanging in the slings at launching in November. If anyone is interested I can post my sample reports.
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Old 12-15-2019, 03:49 AM   #87
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Perhaps on your boat it is simple. Not in mine.
Quote:
Originally Posted by syjos View Post
Remounting the oil filter right end up is a simple project that you do once.

No more punching holes and waiting for the oil to drain out.

And the filter can be prefilled prior to install.

The filter is always full of oil at start up when oriented correctly.
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Old 12-15-2019, 09:32 AM   #88
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I always run filters with anti-drainback valves and when its time to change them poke a hole so they'll drain. Yet they are suspiciously VERY drained 10 minutes later when its time to remove them. When quickly removed I usually don't even get one drip out of them.

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Old 12-15-2019, 09:46 AM   #89
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I always run filters with anti-drainback valves and when its time to change them poke a hole so they'll drain. Yet they are suspiciously VERY drained 10 minutes later when its time to remove them. When quickly removed I usually don't even get one drip out of them.

Ken
Next time, using the same brand filter, spin off the filter without poking holes. You will then confirm whether that valve was operational.
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Old 12-15-2019, 09:55 AM   #90
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CAV Filter adapter

I must be missing something. Isnt the “drainback vave” there to simply insure only filtered oil drains out of the filter? Obviously, the filter has two ports, and only one of them has a valve. Only a port side up filter will stay full. ??
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Old 12-15-2019, 10:43 AM   #91
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I must be missing something. Isnt the “drainback vave” there to simply insure only filtered oil drains out of the filter? Obviously, the filter has two ports, and only one of them has a valve. Only a port side up filter will stay full. ??
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Old 12-15-2019, 11:33 AM   #92
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I must be missing something. Isnt the “drainback vave” there to simply insure only filtered oil drains out of the filter? Obviously, the filter has two ports, and only one of them has a valve. Only a port side up filter will stay full. ??
The valve is there to keep the filter full to prevent dry starts on motors that don't have their filters mounted with the screw-on side on top. Even a horizontal mount will drain back without a valve, at least partially.
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Old 12-15-2019, 12:45 PM   #93
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CAV Filter adapter

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The valve is there to keep the filter full to prevent dry starts on motors that don't have their filters mounted with the screw-on side on top. Even a horizontal mount will drain back without a valve, at least partially.


But when i take off my side mount or top mount valved filters, i can remove most of their contained oil by simply turning it upside down or even sideways.
A good oil change involves a very recently run engine. Thus, a high chance little oil and makeup air has had time to move much volume.

I suppose the real test is to remove oil filters on engines not run for a week. Not something normally done.
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Old 12-15-2019, 05:18 PM   #94
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Here are pictures of the CAV adapters and the rotated oil filter on Sandpipers Lehman.

The CAV adapters were done in 2000 right after purchase.

The oil filter rotated in 2002.
Attached Thumbnails
20191215_124230.jpg   20191215_124344.jpg   20191215_124358.jpg  
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Old 03-06-2020, 04:14 PM   #95
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Just bought 4 new CAV adapters and a handful of WIX 33361 filters. They seem small. Is that right?
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Old 03-06-2020, 05:11 PM   #96
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Just bought 4 new CAV adapters and a handful of WIX 33361 filters. They seem small. Is that right?
Yes, those are correct. They don't have to be so large because water and the vast amount of dirt are stopped by the primary filters.

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Old 03-06-2020, 05:19 PM   #97
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Yes, those are correct. They don't have to be so large because water and the vast amount of dirt are stopped by the primary filters.

Ken



Roger that, thank you. I have RACOR Turbine 1000s for my primaries.
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Old 03-07-2020, 08:36 AM   #98
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Here are pictures of the CAV adapters and the rotated oil filter on Sandpipers Lehman.

The CAV adapters were done in 2000 right after purchase.

The oil filter rotated in 2002.
I am curious. One of the hoses from the top of your oil filter runs a long way and out of the picture. To where is it plumbed?
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Old 03-07-2020, 08:48 AM   #99
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I am curious. One of the hoses from the top of your oil filter runs a long way and out of the picture. To where is it plumbed?
Pic 1 of 3 shows it going to the side of the block. Oil pump outlet?
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Old 03-07-2020, 03:36 PM   #100
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I am curious. One of the hoses from the top of your oil filter runs a long way and out of the picture. To where is it plumbed?
One hose from the filter housing goes to the oil cooler and the other to the oil outlet at the side of the block.

If you're referring to the hose running alongside the stringer, those are fuel lines from the fuel selector/Racor panel.
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