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03-21-2021, 10:43 PM | #1 |
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Mikes Oil Filter question
I recently put on the Mike's valve cover oil filter and I find the oil drains back into the pan making the car read above the F mark on the dip stick. This caused the car to drip oil when it did not in the past.
Would I be better off using a smaller filter (if so what filter) or should I go with a 90 deg. adapter? The one on Snyder's is a bit pricey at $149.95 so if anyone knows of a more cost effective option please let me know. Thanks Ron |
03-21-2021, 11:08 PM | #2 |
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Re: Mikes Oil Filter question
E-bay? It is funny, these used to be easy to find pretty cheap but my quick search only found expensive versions.
The engine builder that I deal with doesn't like oil filters on the Model A engine with the stock oiling system as it puts too much pressure drop into the system. |
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03-21-2021, 11:30 PM | #3 |
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Re: Mikes Oil Filter question
It's been a while since I installed my filter, but I'm not sure what you mean about it draining into the pan. If I recall correctly, the copper line takes the oil from the oil pump coming into the valve chamber, re-routes it into the filter, and then the filtered oil exits back into the valve chamber. Eventually the chamber gets full enough that oil flows down the return pipe back into the oil pan tray, as well as draining through holes in the floor of the chamber. Which part of that process is working differently for you?
The purpose of using a very large filter is so that the Model A's minimal oil pressure will still be enough to push the oil through the filter medium. If you shrink the filter (not even sure you can find a compatible model), you increase the pressure necessary to make the filter work, which might cause the oil to find a path of less resistance. |
03-21-2021, 11:51 PM | #4 | |
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Re: Mikes Oil Filter question
Quote:
How much oil do you have in the engine? Maybe try running ½ qt. less. You may be able to find a 90° adaptor at a salvage yard. They were on V-8 Mustangs and other models. This does not make sense either. The Model A has a positive displacement oil pump and can easily overcome any back pressure a filter may have. All it is doing is pumping oil thru the filter and dumping it into the vale chamber. |
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03-22-2021, 12:02 AM | #5 | |
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Re: Mikes Oil Filter question
Quote:
Ok let me add more detail. I start the car with the NAPA filter provided with the kit. The oil filter fills with oil and works fine however after shutting the car down and waiting for a bit the oil level is about 3/4 of a quart low. This would be the oil now in the filter so I add 3/4 of a quart. When I go check on the car in the morning the level in the pan is high when I check the dip stick. Run the car and shut it off and I am back to a normal level. The oil in the filter must be draining back into the pan over time or an I missing something? Prior to adding the filter an oil reading taken 10 minutes after engine shutdown or the next day was about the same. Ron Last edited by Model A Ron; 03-22-2021 at 12:15 AM. |
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03-22-2021, 12:26 AM | #6 |
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Re: Mikes Oil Filter question
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03-22-2021, 12:48 AM | #7 |
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Re: Mikes Oil Filter question
I don't think it can be the filter. The copper tube from the oil pump line enters the filter assembly at the top, so even if the filter didn't have an anti-drainback valve (which it does), gravity would prevent oil in the "dirty" side of the filter from draining back into the oil line and thence to the pan. After shutdown, some quantity of oil will continue to wick through the filter medium and into the core, exiting back to the valve chamber, but not the entire 3/4 qt.
Didn't you say earlier that you had to replace your oil return pipe when you bought the filter kit? That means you previously had the version where the return pipe is located higher on the valve cover, which means that previously, your car would have retained more oil in the valve chamber when the car shut down. I wonder if that's the reason for the changed behavior. Last edited by alexiskai; 03-22-2021 at 12:54 AM. |
03-22-2021, 12:53 AM | #8 |
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Re: Mikes Oil Filter question
I think that the oil in the valve chamber drains into the crank case over night.
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03-22-2021, 12:56 AM | #9 | |
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Re: Mikes Oil Filter question
Quote:
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03-22-2021, 12:58 AM | #10 | |
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Re: Mikes Oil Filter question
Quote:
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03-22-2021, 01:45 AM | #11 |
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Re: Mikes Oil Filter question
I have had a full flow filter on my A for 20 yrs,the pressure drop over the filter is only 3-4 psi when hot.
Lawrie |
03-22-2021, 07:47 AM | #12 | |
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Re: Mikes Oil Filter question
Quote:
Ron |
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03-22-2021, 01:24 PM | #13 | |
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Re: Mikes Oil Filter question
Quote:
David Serrano |
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03-22-2021, 01:36 PM | #14 |
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Re: Mikes Oil Filter question
If you want a shorter filter use a Wix filter #51068, it come painted black.
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03-22-2021, 01:57 PM | #15 |
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Re: Mikes Oil Filter question
A lot of people, me included, run the oil level between F and E. I think you have too much oil in there. I use WIX 51515 filters.
Last edited by Y-Blockhead; 03-22-2021 at 02:03 PM. |
03-22-2021, 02:32 PM | #16 | |
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Re: Mikes Oil Filter question
Quote:
The Fram PH8A opens at 12. The Wix 51806 (aka NapaGold 1806) opens at 7, that might be one to try. Last edited by alexiskai; 03-22-2021 at 02:38 PM. |
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03-22-2021, 02:43 PM | #17 |
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Re: Mikes Oil Filter question
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03-22-2021, 02:52 PM | #18 |
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Re: Mikes Oil Filter question
Correct, each Napa Gold filter has a WIX counterpart, so the WIX 51515 is the Napa Gold 1515.
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03-22-2021, 11:12 PM | #19 |
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Re: Mikes Oil Filter question
Thanks for all the information.
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03-23-2021, 02:34 AM | #20 |
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Re: Mikes Oil Filter question
Did you ever call Mikes?
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