Quote:
Originally Posted by CSG Mike
Stop top hat =/= stock center nut. Depending on his shaft, it may be different, which may have a different torque spec.
OEM is M12x1.25, but Tein and JRZ are both M14x1.5. AST is typically M12x1.25, but not always.
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Very true I haven’t even thought of that.
OP it looks like the 5100 series coilovers use an M12 nut.
Are you using the AST nut on the OEM top hat? It’s a long shot, but the AST nut arent flanged like the OEM nut. I know the factory top hats do not use a washer between the strut nut and upper top hat bearing, so the flanged nut may be needed to avoid spring bind 100% of the time? Long shot for sure, but I’d personally go through the trouble of putting the stock strut nuts on and listen for the noise.