Making Your Own Oil Cooler Adapter Plate

[Anonymous]

My bike already had an oil cooler on it, but it looks like they just drilled and tapped the stock block-off for the AN fittings and used braided line.

If I had photo hosting, I would take a pic and post it, but I don't...

[Anonymous]

Yes indeed, you'd need to have a flow path. Porting two hoses into the same area wouldn't work since both ports would be under the same pressure. You'd likely just trap an air bubble in the cooler. Even one way valves wouldn't help because the pressure would be equal on both ends of the hose. You really need to have a pressure side (to pump) and a non-pressure side (to dump) the oil. On my GS-750E I don't know if I've got the banjo fittings Hap refers to, but maybe I do. But even if I don't, I'd be able to take a tap off the Oil-pressure switch and then feed it back to the engine somewhere else -- as long as the pressure drop was enough to still allow the pressure switch to indicate.

Just my 2 pennies

Roger

Say roger
if he did in fact put holes on the filter plate the pressure drop should be across the oil filter--thats why they work ok

[Anonymous]

Scotty,

Perhaps I'm the one slow today, but as I recall everything under the filter cover is the same pressure and it forces oil through the filter, so that the only pressure drop is "though the filter" and would only have to do with sending oil back to the sump.

I'm not sure what the oil path is through the engine, but I'm pretty sure that under the filter cover the pressure is all the same, so two holes drilled in there would not allow for flow. I'll have to look at that a little closer when I change my oil again, which should be soon. I'm just running this oil change for a couple weeks, since it is the first oil change in a few years. But I do have a spare cooler that I'd like to put on too, if I can figure out a good way to do it.

Roger

[Anonymous]

Scotty,

Perhaps I'm the one slow today, but as I recall everything under the filter cover is the same pressure and it forces oil through the filter, so that the only pressure drop is "though the filter" and would only have to do with sending oil back to the sump.

I'm not sure what the oil path is through the engine, but I'm pretty sure that under the filter cover the pressure is all the same, so two holes drilled in there would not allow for flow. I'll have to look at that a little closer when I change my oil again, which should be soon. I'm just running this oil change for a couple weeks, since it is the first oil change in a few years. But I do have a spare cooler that I'd like to put on too, if I can figure out a good way to do it.

Roger

Well Roger then perhaps you have just explained exactly why the original filter plate is not even a candidate for modification??

[Anonymous]

Well Roger then perhaps you have just explained exactly why the original filter plate is not even a candidate for modification??

I could maybe polish it a little more than it is

[Anonymous]

Roger and Hap
the reason for sall of of my poking here is that we originally were trying
to find out if there is a definite diference in design between the stock filter cover and the oil cooler adapter that replaces the stock filter cover--I have one like this and i cant for the life of me remember seeing any diference in the lay out of the inside of the adapter--but i truly dont remember and would like very much to know

[Anonymous]

My bike already had an oil cooler on it, but it looks like they just drilled and tapped the stock block-off for the AN fittings and used braided line.

If I had photo hosting, I would take a pic and post it, but I don't...

those blocks all have the places to install an oil cooler which are located to the left and right of the oil filter cover and down a bit--hap had mentioned that i believe-mine has them but it was cheaper for me to do it this way--had i done it with the supplied locations, i would not have set the manifold on fore so many times

[Hap Call]

Scotty,

My '81 GS750E used the oil filter plate for the cooler. It had the high-pressure oil system. When I purchased the oil cooler for my 1100 it was fed from the rear oil pressure sensor location. The 1100 has the low-pressure oil system. I never put that one on the 1100 (why, I don't remember) but now I am going to use the two front galleys to pipe in my cooler. One thing to note is it looks like both the plate and the front galleys only offer partial flow while the pick-up at the oil sensor would give you full flow (100% of the oil would pass through it).

I am with you on the wanting to know exactly how these different cooling systems work!

Hap

[Anonymous]

Scotty,

My '81 GS750E used the oil filter plate for the cooler. It had the high-pressure oil system. When I purchased the oil cooler for my 1100 it was fed from the rear oil pressure sensor location. The 1100 has the low-pressure oil system. I never put that one on the 1100 (why, I don't remember) but now I am going to use the two front galleys to pipe in my cooler. One thing to note is it looks like both the plate and the front galleys only offer partial flow while the pick-up at the oil sensor would give you full flow (100% of the oil would pass through it).

I am with you on the wanting to know exactly how these different cooling systems work!

Hap

I have seen it mentioned that diverting too much oil woild not be desireable. Frank was in on that conversation as i recall. if the pick up at the oil sensor gives full flow then it almost sounds like it would totally pass up the top end???

[brs127s]

Hey guys,
I noticed on my 850, there is what the schematics call an oil check plug just below the backside of the base of the head. I have no idea what it's purpose is. Could this be a possible reentry point if routing oil out of the oil sensor area?

I am also still curious about the function of an adapter plate at the oil filter area. I would like to understand the concept of how it works. Scotty, maybe the next time you change your oil and filter, you can look it over closely.

Hap,
The pictures were a great help. As I stated in the e-mail I sent you, I think that fitting allows the oil to exit and reenter from the oil sensor housing.

[Hap Call]

I have seen it mentioned that diverting too much oil woild not be desireable. Frank was in on that conversation as i recall. if the pick up at the oil sensor gives full flow then it almost sounds like it would totally pass up the top end???

Scotty,

I can send you the same photos I sent Brandon...It appears that it still forces oil up to the top end by returning the oil back to the oil sensor location...the pictures show how it is done.

Let me know if you want me to send the photos.

Hap

[Anonymous]

I have seen it mentioned that diverting too much oil woild not be desireable. Frank was in on that conversation as i recall. if the pick up at the oil sensor gives full flow then it almost sounds like it would totally pass up the top end???

Scotty,

I can send you the same photos I sent Brandon...It appears that it still forces oil up to the top end by returning the oil back to the oil sensor location...the pictures show how it is done.

Let me know if you want me to send the photos.

Hap

the adapter must have proportional flow of some sort built into the machining of it photos not necessary but thanks for the reply

[Anonymous]

Hey guys,

I am also still curious about the function of an adapter plate at the oil filter area. I would like to understand the concept of how it works. Scotty, maybe the next time you change your oil and filter, you can look it over closely.
.

Yes I am tempted to do a 200 mile oil change on synthetic oil just to get a look at the design of the adapter--now i wont sleep for months

[jpaul]

I have a Derale oil cooler on my 82 GS1100E. It came with a new oil filter cover that the fittings for the oil cooler screw into. One of the holes in the cover is in line with hole where oil enters into the oil filter chamber. When the oil enters the chamber, the path of least resistance is to go through the line and through the cooler, assuming that the thermostat on the cooler is open. If the thermostat is closed, or the line is blocked for some other reason, the oil just goes through the filter as it normally would. I don't believe that all the oil flows through the cooler, but enough does to drop the average oil temp by about 20 - 25?F.

[Anonymous]

I have a Derale oil cooler on my 82 GS1100E. It came with a new oil filter cover that the fittings for the oil cooler screw into. One of the holes in the cover is in line with hole where oil enters into the oil filter chamber. When the oil enters the chamber, the path of least resistance is to go through the line and through the cooler, assuming that the thermostat on the cooler is open. If the thermostat is closed, or the line is blocked for some other reason, the oil just goes through the filter as it normally would. I don't believe that all the oil flows through the cooler, but enough does to drop the average oil temp by about 20 - 25?F.

I remember frank P saying that 1/3 of the oil passes through some coooler that he has on his bike--we were talking about the 1/3 increase given by 750 oil pump gears when installed in the 1100cc engines.