69hurstolds said:83hurstguy has it right. The preload on them is a catch 22. You obviously want it to be tight against the bumper to prevent sliding around, but like he said, it puts pressure on the upper bolts and after the years, the plastic gets brittle and pop goes the bolt hole ends. I have used black plastic "spacers" in the past to help alleviate the pressure on the bracket with good results. I got plenty of the brackets on hand to last me the rest of my life, but it would be nice if someone actually made aftermarket stuff BETTER than originals where feasibly, financially, and reasonably possible. If you can't, you can't. But this is one part I'd tweak the design a bit.
Anyone that's had an Olds G47 bodystyle and had one just break for no reason knows exactly what the problems are. If you haven't had a broken one in your life, then consider yourself a lucky soul. But there's usually a darn good reason people are asking for replacements.
69hurstolds said:It's not about overtorquing bolts or 80s plastics. I got original 80s plastic parts all over my cars and not all have given up the ghost yet. The original flaw is all in the design.
Don't get the idea I'm knocking the new bracket. I'm not. It looks great and probably will work just fine. It's just that if it fits exactly like the old one, it too, will give up the backside of the top mounts- eventually. Due to the pressure loading on the bolt holes. I asked a simple question and I got my answer. Y'all get a bit too defensive sometimes.
Restoration parts that hide the improvements but still appear to be original looking are the way to go if feasible. And I understand the decisions made at the time that it wasn't worth it to tweak the design. OK, fine. Anyway, like the originals, time will tell. At least they're available again. But I'd suggest buying a spare for a few years down the road.
Sorry but that would not be NOS original correct & your not a GM engineer. There you go thinking way too far outside the box. LOL Allowing expansion & contraction? What are you thinking 😉pontiacgp said:what about installing it with these types of rivets...it will allow the holder move a little if one of the problems is the different rates of expansion and contraction of plastic and metal. We use them in racing when body panels get torn off and the rivet hole is opened up
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