AJ80
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Need some advice.... I have put my RB25 head on a RB30 bottom end, under pressure it has a water leak... it can run at idle and no water leaks but once its under pressure (on the dyno) it leaks water. Ive checked the old bottom end and compared it to the RB30 and it all looks the same. Was wanting to know if anyone knows of any reason why this would be happening?