AAZ rattling noise
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marlinowner
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Re: AAZ rattling noise
Maybe a bolt sheared first and was rattling around, lots of stress then on the cap and other bolt.
1993 SA VW T25/T3 2.5i Microbus/homebrew camper
1981/1968 Marlin Kitcar TR6 Engine
1981/1968 Marlin Kitcar TR6 Engine
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silverbullet
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Re: AAZ rattling noise
Photos will tell all, especially the fracture faces of the cap and the bolts.
PS bearing cap bolts arent subject to shear, they are axially loaded so its all about crack propagation, usually initiated at the thread root/runout which is a stress raiser.
Unusual with production rolled threads though, as opposed to cut threads.
My gut says bearing cap fatigue i.e. AAZ may have limited operating hours before failure.
PS bearing cap bolts arent subject to shear, they are axially loaded so its all about crack propagation, usually initiated at the thread root/runout which is a stress raiser.
Unusual with production rolled threads though, as opposed to cut threads.
My gut says bearing cap fatigue i.e. AAZ may have limited operating hours before failure.
1985 Oettinger 3.2 Caravelle RHD syncro twin slider. SA Microbus bumpers, duplex winch system, ARC 7X15 period alloys