G5 LCS PC conversion

[Neodymium]

I have the Delphi G5 cooling system that came with the G5 I'm modding. Locum51 posted some guidance on modding a similar Laing LCS in the workbench section. I was thinking if I can get it to work, maybe install it in a test rig and see what can be done.

Any thoughts?

[Aldersan]

Why are you typing this and not doing it?

[Neodymium]

LOL OK, lets see what I can get done tomorrow...shouldn't take long. whether it works or not, will post back, hopefully working and not fried...

[Neodymium]

So, here's the pump and rad assembly...next up, draining the coolant.

The whole assembly:
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0004.jpg
The CPUs
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0006.jpg
The pipes and rad:
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0005.jpg
Pump:
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0009.jpg
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0010.jpg
This part goes on the CPU, it's dated Sept 17 2004 :D
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0012.jpg

Any comments or guidance on next steps is appreciated. If this works out, I will make a work log for it.

Thanks.

[Kayin]

Be very careful, the coolant in there is a corrosive salt-based stuff, it's not antifreeze or something simple. Those assemblies can be rather difficult to work with.

[Neodymium]

Thanks Kayin...do you think it can be replaced with the stuff like this?

Frozen CPU Premix coolant (http://www.frozencpu.com/products/14159/ex-liq-189/EK_EKoolant_Premium_Liquid_Cooling_Premix_Coolant_-_1L_-_Clear.html?tl=g30c103s183)

[Technochicken]

I looked into this myself before doing my G5 mod (although I didn't have the LC version), and the only obvious problem I can see is the original water blocks. The water blocks are designed for contact directly with the CPU die, rather than a heatspreader like Intel/AMD CPUs have, so they have very little internal surface area compared to standard CPU blocks:

http://www.xlr8yourmac.com/systems/G5_CoolantLeak_Repair/figure2.jpg

This may be a problem, but it may not. Best way to find out is to try it. I'll definitely be watching!

[Neodymium]

Thanks Ben, I found out a way to get the water-blocks working with this setup...I may need to extend the tubing to fit the setup....basically, when I started reading up on stuff online, I found that an existing stock heat sink with a copper core can be diagonally cross drilled to create the flow with barbs on each hole or a copper tube can be bent to shape and soldered on top of the heat sink and get the juice flowing through it. I am having some trouble figuring out which connectors are which...and if the pump is working or not.

[Neodymium]

OK, got the pump running...the pin pattern is basically what Technochicken suggested in another post about Laing pumps. 6-4-3-1. I connected ground to 6 and 12v to 4 and we were on our merry way. I am not opening the pump to get to the board, just working off wires...btw, while the pump works fine...there is some greenish yellow crumbly goop sticking out on the sides of the blocks (see the pic)...saw it the first time when I removed the CPUs. But no leaks or anything...neither on the MB or the case. Is it just moisture? Any thoughts?
Sorry, my camera messed this pic up like 5 times, took the best of the 5 :D
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0021.jpg
Crumbling goop:
http://i1270.photobucket.com/albums/jj613/Ne0dymium_/IMG_0024.jpg

[Technochicken]

Apparently the greenish stuff is a common problem:

http://www.xlr8yourmac.com/systems/G5_CoolantLeak_Repair/G5_CoolantLeak_Repair_p2.html#storytop

I just noticed in your last picture that there is a slightly raised area in the center of the block. Are you going to machine that off somehow to get better contact area?

[Neodymium]

Thanks TC. I am actually thinking about doing something like this:
Preparing the water block - Homemade Water Cooling (http://www.instructables.com/id/Home-Made-PC-water-cooling/step2/Preparing-the-water-block/)

That way, I can reuse mostly everything except the blocks themselves. Let me know what you think.