Need help on replacement coolant, O-rings, hose and clamps for PowerMac G5 DP 2.5GHz Delphi LCS

[sheapuppy]

Hi everyone,

I'm in the process of refurbishing the LCS unit on my PowerMac G5 DP 2.5GHz, as I started noticing the "white rice" near the CPUs. After disassembling the unit, most of the hoses are hardened, and I broke some of the clamps as I was taking them off from the base with my pliers. Obviously, I also need to replace the infamous O-rings.

Does anyone have recommendations on replacement parts for these?

Also, what should I use for coolant replacement? I've heard that some people use a combination of distilled water with Prestone Dex-Cool liquid gel coolant.

I should add that mine is a Delphi LCS cooling unit.

Any suggestions/advice would be appreciated!

TIA...JP

 

[maxman69]

....following... having a bear of a time locating o rings myself. Best measurements with a caliper are 34.5 mm OD, 30.5 mm ID, 3 mm width, 1 mm height, flat not round.

 

[sheapuppy]

I've put this project on hold while I've been working on my regular cooled 2.0GHz PPC late 2004.

Regarding my LCS unit, I've been reading some posts in this forum, and some say the clamps and hose should be "about" 3/8". The O-rings I got the following information from another post as well here in the forum:

The specs on the smaller o-ring have a thickness of 1/16", Outside Dimension (O.D.) 1.375", and Inside Dimension (I.D.) 1.250. It is made of Viton, which according to a tech person at MCS is the best material for coming into the coolant (Glycol) and be under some pressure and heat (rated to 400 degrees F). The order number for this o-ring at MCS is 02049971. The AS568A Dash No. is 026. The Dash number is a standard across multiple industries based on OD, ID, and thickness.