Single turby, water cooled plumbing?

mini_me1209

MZ21 1jz Single Turbo
May 27, 2007
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Lethbridge
I keep springing a leak where the turbo's coolant return line enters the water pump. The stock nipple on the water pump is slightly wider than those located on the upper water neck. 6AN (what im using) is slightly too small and 8AN is to large. I softened up the 6AN rubber with a heat gun and rammed er' on there and fastened with a worm clamp. It's looking like the stretched rubber is fatiguing and causing the leak.
*im running a 2j water pump*
I'd like to know how other's got around this problem.
 
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