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Cracks in BT Hi Riser Heads

May 17 2017 at 5:47 PM
bart  (Login RATPOISON511)

I have a set of BT Hi Riser heads which have developed cracks from where the head top rear head bolt bushings go into the bolt holes into coolant passages. We have welded plugs in the rear passageways in the heads to stop the cracking and H2o leaks. It appears that other cracks are starting to appear in the front top bolt holes, although they don't appear to be headed to H2o passages.I would suggest that anyone using these heads look closely at the aforementioned areas. Hope this helps someone.

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