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I can't speak about everyone's XR1 issues but I do know some things about the XR1/W7 engine. That block was initially purchased from Kent with no head studs and lifter bores machined in it. Reason being, it was originally going to be used with P5 heads. Later on they decided to run the W7's to go heads-up class racing. (Mainly X275 and NMCA Xtreme Street and Street Outlaw classes.) The block was then sent out to be machined for head studs and lifter bores. In the process of drilling the head studs, they were drilled in the wrong location and they had to be plugged and re-drilled again. Water was basically coming up through the head studs and leaking while on the dyno. Being a former manufacturer rep I can sympathize when certain details are left unknown and I just wanted to set the record straight on this particular situation. Thanks!

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I hope he can get it together. were the holes put in the wrong place by kents machine shop or some one else.