Jambalah wrote:
rms,
Quote:

Hello Christoph!
I started from those links:

http://www.xlr8yourmac.com/systems/G5_CoolantLeak_Repair/G5_CoolantLeak_Repair_p1.html
https://discussions.apple.com/thread/3842869?start=0&tstart=0
http://forums.macrumors.com/showthread.php?t=1109014
http://www.saunalahti.fi/~holindho/g5-quad-v1-lcs-repair.html

Though the last link is G5 quad specific, it has interesting tips for refilling and testing the pump.
Let's speak about o-rings, the most important part: the first link report those dimensions:
- internal diameter: 1.313" --> 3,33502 cm
- outside diameter: 1.438" --> 3,65252 cm
- thickness: 1/16" --> 1,5875 mm
The second link specifies different dimension:
- internal diameter: 3,16 cm
- thickness: 2,4 mm
I ordered the second one since the fellow wich performed the refurbish on his G5 dual 2.7 wrote those o-rings are a little thicker but are ok. Ordered here:
http://simplybearings.co.uk/shop/
Obviously, those were wrong sizes.... and so I used my dremel gently and with great caution to work the hose part where o-ring would have placed.
So don't make my error: order rhe right one!
Here:
http://simplybearings.co.uk/shop/p513146/1.5mm+Section+33.5mm+Bore+VITON+Rubber+O-Rings+Allow+2-3+Days/product_info.html
or here:
http://www.ebay.it/itm/221133721374?var=520114057577&ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649.......