Oil line routing question???
 

Hey all,

I’m adding an oil filter relocation setup to my 572. I’ve drawn up two ways to do it. Can y’all have a quick look and comment?
I know the question of filtering hot or cooled oil has been brought up. Personally I like the idea of filtering right before it goes into the block, but not sure if that’s really necessary. Hopefully these pictures are adequate. Sorry they ended up uploading sideways. If there is a better way to do it, please feel free to add that.

Thanks.


https://cimg6.ibsrv.net/gimg/www.off...54101e69c.jpeg
https://cimg7.ibsrv.net/gimg/www.off...f9fdcd5cb.jpeg

You really should filter the HOT oil first thing out of the block. Then cooler. Then into the block. Hot oil goes thru the filter much much easier than cooled oil. By placing the filter last before the block your making it your primary restriction.
Secondly, if something goes sideways, and the oil pump is pumping engine glitter, your putting it thru all your lines and your cooler. Potentially blocking the cooler and making a bad situation a catastrophic situation. Then you have to find a way to clean out all that line and your cooler or scrap it.

https://cimg3.ibsrv.net/gimg/www.off...773dbf79b.jpeg
Like this? Everyone agree?

FYI: The direction oil flows thru the cooler is important. It cools the oil better one way than the other. Can't remember off hand if it's supposed to go with or against the flow of water but someone will likely chime in. If not, a quick search here will tell ya.

It cools better when the flow directions are against each other.

Thx!. Looking back, op has it right in his second pic.

Edit: This is only in regards to the oil/water flow direction thru oil cooler.

I think your very first picture option #1 in post #1 actually has the ability to bypass the oil filter the way it is plumbed if I'm reading it correctly.

Post #3 is how I would do it with a stand alone thermostat.

My opinion… Filter last.

To quote a 9000+rpm 500 mile almost every weekend head of an engine program :

”Debris can come loose in the cooler from manufacturing. Even the highest quality coolers as can have this problem.
Again, the filter is to protect the engine from itself (wear particles) and the system (Debris from manufacturing) be it lines, fittings, cooler or debris entering the system while servicing.”

I add….Hoses too.

Filter right after it comes out of the block, anything else would keep me up at night.
SB ... debris from a cooler, what debris?! maybe 9000 rpm scrambled that dudes brain but I couoldn`tr disagree more.
Filter and colder oil is also dumb .

I only see one way to not filter “cool” oil and that would be the 1st pic. However this would bypass the filter until the thermostat opened up and routed the oil to the filter and then on to the cooler.

The 2nd pic would filter ALL oil cool and hot before it goes into the block.

The 3rd pic would filter ALL oil cool and hot but would do so after it leaves the block.

I think I am more confused now after looking at all 3 options. lol. Everyone thinks filtering cool oil is a bad thing but the only way I see to not filter cool oil would be the 1st pic.

The whole point of the Tstat is to get the oil to temp faster, but this involves returning the oil back to the block to heat it up. So how do you accomplish this AND filter the oil as for awhile it’s going to be cool until it isn’t.

If you have an oil filter with a built in bypass, does it bypass the filter element until the oil heats up?

Thanks all. I’m not disagreeing with anyone, I’m just trying to wrap my head around how you accomplish not filtering cool oil unless you bypass the filter.

‘Thanks

I just finished up this very thing. I got a lot of help from this site. The thermostat has "From Source and To Source". The route I did was: from the engine (source), to the filter, from the filter to the thermostat and you will connect up to the "from source" connection point. The "to source" connection point of the thermostat goes back to the engine. The other "loop" of the thermostat is for the cooler. Should say to and from cooler on it. Pretty simple. I understand that running the flow of oil against the flow of water transfers heat better. I installed my oil temp sensor in the filter head. Hope this helps.

Sarcasm….

Screens in the tops fuel injectors never trap debris, nor clog. Right ?

Also ,Guess i’ll remove my water filters at sink and fridge drinking spigots and put them right where water enters the house instead.

Serious…..
why would you put the final filter (or only) before possible sources of debris ?

Noone’s ever got debris in a Holley needle and seat or jet that could have been caught by an inlet screen in the bowl inlets ? I have in mine and others. 50 times ? How about injectors ? 100 or more injectors ?Even Merc 496 famous for this…

Round table talk on filter location. OP brought subject up. I’m Just pushing my opinion. Not jumping up and down about the other way. I don’t make peeps change it on the boats i work on, or tie up to, or ……:)

So the oil in your oil pan isn`t hot?
2 and 3 come straight out of the pan.

I’m referring to the temp of the oil at initial engine startup. Unless you use the Tstat to bypass the oil filter wouldn’t that be filtering cold oil?

You messing with me?
Yes , at cold start up oil will be cold.
There is no stat that bypasses the oil filter.
The thermostats job is to redirect oil to cooler when the temp gets to a certain temperature, has nothing to do with oil filter.

First line near head goes from engine straight to oil filter, if the oil is cold it goes back into engine.
When the temp gets to 180* (in my case) the thermostat opens and it goes thru the cooler before it hits engine,
At no point is the filter ever bypassed by the thermostat.


https://cimg5.ibsrv.net/gimg/www.off...b106693f8e.jpg

That is one beautiful piece of hardware. Nice and compact set up on your oil lines.

lol. No man, not messing with you. I guess I’m wondering why some question filtering cold oil vs. hot oil. The way my first pic is plumbed 90% of the oil at start up would bypass the oil filter. As the engine oil heated up, more would flow through the filter. When the Tstat is fully open then majority of it would be filtered. My Tstat is fully open at 212. Goes thru the cooler and comes out approx. 50* cooler. But I certainly wouldn’t call that cold oil. Slightly cooler yes. I honestly thought folks were talking about cold start up oil.

Which is why I initially asked the question.

So I believe you said filter right after the oil comes out of the block and I think that is how I will plumb it. Pic #3

‘Thanks everyone who chimed in. I am a relative newbie to most of this stuff.

Well, no matter where the filter is, it's going to get cold oil on start up if it's plumbed right. It doesn't stay cool long. And your not, or shouldn't be, stringing out your engine right upon start up. (Unless your top fuel racing.) As long as the thermostat works right, the cooler won't always be getting 100% of the oil after the engine is warmed up. But by putting hot oil thru the filter there is less pressure drop thru the filter.
If your worried about debris from anything after the filter you could put in a higher mesh, less restrictive filter before the oil returns to the block.

Smitty,

Thats funny. I was thinking the same thing after weighing the options. A two filter system might be the best protection. Something to consider. Thanks to everyone who contributed to this discussion.