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I've searched and can't find an answer. I have the tall oil filter canister and i know it has the wrong filter in it because it is the short filter. Firstly all I can find are the short filters is there sspurce for the tall ones?
Secondly how does the system work? The oil comes in the side of the canister and flows through the filter into the center pipe? The pipe is open on the top so is that how the 95% bypass works? I only see 1 tiny hole in the side of the pipe that would be inside the filter. Are there more holes farther down?
Brent, NAPA should have both sizes of filters, so check with them.
As far as how the system works, yes it is of the bypass type, meaning that, unlike modern systems in which the oil passes through the filter before going through the bearings, etc., only a small portion of oil goes through the filter. Most gets pumped directly from sump to bearings.
The oil comes in under pressure through the tube on the side of the can, passes through the element, and is drained out through the center cannister tube and then dribbles through the bottom tube into the oil pan.
Also be aware that there is a steel "spacer" thing that is supposed to be at the bottom of the cannister that the element sits on. Make sure it is still there, and that some previous owner hasn't lost it. With the element out, you should always stick your paw into the can and pull out that spacer, then wipe out the bottom of the can.
Canadian engines used a different filter than US. The Canadian element is NAPA #1021.
You should add your Location to your User Profile as it affects a lot of things. Also the year and model of your truck can be added to your Signature. All this is accessed in UserCP (User control panel).
I bought my taller filter at Car quest, I have the canister on the bench, I do not have this metal plate that is spoke of above, this concerns me, any pictures of this plate?
1951 M3 ,239 V8
Greg
Greg, I just changed the oil in Gertie last week, so I am reluctant to go out and pull the filter to remove the spacer so as to photograph it. Will try to explain what it looks like.
It is basically a piece of steel sheet metal that has been pressed into a cylindrical cup approximately 3/4" in diameter. It has three notches cut into the walls that make it look like a three legged stool. The flat top has a hole slightly larger than the center tube inside the oil filter cannister. Total length is perhaps 1". With the cannister completely empty of oil, filter, and spacer, the spacer goes in first with the legs pointing down. Then the filter goes in and sits on top of the spacer, then the cannister cover with the seal.
Since the OP has a Canadian truck, I am not sure if it uses a spacer, but I would think it should. All the US made cannisters I have seen have these little "stands" in the bottom to keep the filter from literally sitting directly on the bottom of the filter can.
I updated my info I think. The canister I have has built in dimples that serve to hold the filter up I believe. There is no separate stand. I will try to get a pic when I get home tonight. I will dig around in the oil and see if there is one in the running motor.
yep, mines a merc m3, taller filter, bumps stamped in the bottom of canister hold filter at correct height as apposed to the three legged spacer, at least on mine.
I slid filter in plc to vierfy( shoulda lubed center post)
anyway, just enough space for top spring, you folks are just gol darn awsome, so glad to be here.
My carquest part number for "M" truck oil filter is
85021. I so want to learn to post pictures, I am as old as my truck, that's my excuse 👴🏻
Greg
Napa did have the correct filter 1021. Thanks. I checked and I don't have the little stool in the bottom. None of my filters have the washer under the spring like in the parts diagram. I just threw a 1/2" washer in there under the spring. Looks good and reinforces the filter.
Yes, there are small holes in the center tube part way down only. The problem is that if a PO has not changed the oil or if the truck has been sitting for a while the small holes in the center post become clogged with sludge and rust. And if you don't clean out the bottom of the cannister, a messy job at best, the sludge/rust/crud builds up. Also the elbow going into the top of the filter is calibrated to allow only a certain amount of oil into the filter. Note that the aftermarket Fram canisters have a drain plug in the bottom to help with a thorough clean out.
The extra tall filter canister on this 1951 M3 in my shed has a drain plug, I wonder if its factory?
Also, i cleaned my canister very good, on the bench, I can only find one small hole in center tube for oil return, is there more than one return hole?
thanks folks.
Greg
The drain plug is correct same as mine. The oil only drains back to the inlet line 1/2 way up the side on its own. To empty it completely u would have to drain it with that plug.
I could only find the 1 hole in my centre pipe as well. The new filter came with 2 large gaskets that don't seem to fit anywhere?
Neither of the gaskets fit the lid? The #1006's that US flatheads use come with 2 different lid gaskets, because they are used in a couple of different applications.
There is usually only one hole in the center pipe, although some folks have posted pictures of ones with 2 holes.
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