Oil Cooler Adaptor Feedback Needed

[Jd Powell]

Thanks posplayr, that pretty much clears it all up!:-D

[posplayr]

GS1100E Top End Oiler Fittings

FYI for reference you can see what I was going through working on my questions and sorting this out. It was all in recent memory

http://www.thegsresources.com/_forum/showthread.php?t=120828

Posplayr

[Nessism]

There are some 8V oil cooler setups that grab oil flow from the adapter plate in the back and dump it back into the oil filter cover after it goes through the cooler (robertrob has a setup like this). I was considering trying this but decided against it since oil flow is taken away from the ports leading to the transmission and head, and bypassed over to the oil filter. Maybe this is not an issue as the engine has excess volume? Not sure. Most of the more well known oil coolers, like the lockhart, take the full oil volume and send it through the cooler. This way, the full volume will be available for the engine use after it comes back to the adapter plate. Again, not sure this much volume is needed...just erroring on the conservative side.

Edit: After reading Posplay's comments about the oil flow it seems the oil flows from front to back, not the other way around like I mentioned above; plenty of oil should flow to the engine thus my concern is unfounded. Posplay's new concern is that unfiltered oil will be circulated through the engine since it's bypassing the oil filter.

[posplayr]

Nessism

It would be interesting to see a 8V lubrications schematic, but if it is like the 16V I don't see how oil can go from the back plate back to the oil filter cover?8-[

Here are three alternatives in the link.

a.) The first is a standard 8V representations (similar to yours).

b.) The second as you described which would mean that the pressure on return after going through both a filter and a cooler is still at pump pressure??? Not sure this can work.

c.) This is what I suggest is probably really going on and as you describe is only grabbing part of the flow from the filter, but also means that the flow through the cooler never sees the flow through the filter. It also means if you change filter type, you could change the flow distribution between the two paths (i.e. cooler path and filter path). This is what I meant would be difficult to control.The worst thing is if this is really what is going on is that if you ever get some metal in your engine, you are likely to destroy not only the pump but also the rest of the motor as there is a low impedance path directly around the filter.

I think option 1 is the best as all of the oil goes through the filter and then the bulk through the cooler. A small amount can be tapped off to by pass the cooler but it all still goes through the filter.

http://www.posplayr.100megsfree3.com/gs750/8V_Cooler_Configs.pdf

I don't own an 8V motor but if my theory is correct then there may be some ticking time bomb 8V motors out there.

Posplayr

[Nessism]

Great explaination Posplayr. I just assumed the oil flow was from the back plate to the oil filter cover plate, not the other way around. I agree with you that most likely it's the other way around. BTW, I saved your pdf to my computer. Great stuff.

[posplayr]

I started a new thread as a warning

I checked the manual lubrications circuits so if anybody is using the filter cover it will not be good if they get metal in the engine.

Posplayr