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Old 02-08-2015, 07:38 PM   #11
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On my 96' I never had any heat shields, but I'd keep using them if they had them on there, better safe than sorry, I have not seen any on the from of any 3800 II motors personally, maybe somebody else has, if you did not have them on before I'd not worry as long as you ran the wires properly, they should clip into the part that runs along the bottom of the front valve cover..

I have also hard of problems with the rear wire touching the O2 sensor, mine is a few inches away from it, so I personally have not had any issues, if possible you should try to at least keep them from touching if possible, the wires are shielded inside, but I'd still not want them to touch.
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Old 02-09-2015, 02:40 AM   #12
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Ya the 97 PA have these shields on them on rear only..what fun...
Last time I replaced my wires & plugs, I cleaned the interior of the shields, and put a sniff of anti seize in there...cause they were almost welded in place on the old wire/boot.
Here is what the shields look like...
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Old 02-09-2015, 08:47 AM   #13
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its been my experience with high voltage if you put anything metal near it, it will eventually work its way to it and arc out, if it was just heat shield it would not have that spring on there. i imagine some sort of radio interference or sensor interference. have never reinstalled them and have not had any issue.

i have tried copper plugs on a few cars, but they ran worse than the old platinum ones right out of the box, so they were replaced
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Old 02-09-2015, 01:25 PM   #14
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Just my thoughts on brands of plugs, I've never seen Champions work well in anything but lawnmowers, when I was a young man I grew up on a farm and my father had an old iH TD9 diesel tractor that started on gas and you switched it over to diesel (pre-glow plug days), he had installed Champion plugs in it and it wouldn't start, new set of AC-Delcos and problem solved. He had also tried Champions in his 61 Impala with poor results also. From that day forward it has been only AC-Delco plugs in my GM'*. I've used Autolites in a Ford Ranchero and NGK'* in a KZ1000 I once had with good results, point of story, only use OEM plugs.
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