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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-15-2007, 08:24 AM   #1
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Default What spark plug

Ok guys, I am wrapping up on replacing the engine in my 1995 Bonneville SE with an engine from a 2002 Imapla. I have noticed that the spark plugs are different. I'm assuming that since I didn't replace the computer that I should use the plugs for the 95 Bonny? I had Autolight Platinum AP605'* in the Bonny. I purchased new Bosch Platinums. The Bosch box says 4041 but I can't find anything that list'* this plug for the 95 Bonny. I don't alwasy trust some of these young kids behind the parts counter that give you these parts when you give them a make and model listing.
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Old 06-15-2007, 08:32 AM   #2
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Both the '95 3800 and the '02 3800 use the same spark plug. Autolite #606 or equivilent.
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Old 06-15-2007, 08:35 AM   #3
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Ok.. first off.. Bosch platinums are a bad choice for a waste spark system like ours. They typically begin failing in a month or less.

Now..on motor swapping.. if your old plugs weren't high mileage, they should still be good with a quick clean and checking of the gap. Toss them in.
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Old 06-15-2007, 11:30 PM   #4
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Went with Delco Iridiums when mine needed it. No troubles!
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Old 06-16-2007, 04:21 PM   #5
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Default Not recommended to use Platinums on waste spark systems

Quote:
Fm > Bill Boost 37
Bosch platinums are a bad choice for a waste spark system...
Very good alert & reminder
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Old 06-16-2007, 05:05 PM   #6
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My 96 ate the Bosch plugs.
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Old 06-16-2007, 05:31 PM   #7
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Quote:
Originally Posted by SlowBonne
Went with Delco Iridiums when mine needed it. No troubles!
Should be just fine for you, but ALWAYS stay away from Platinums if you were supercharged (I know you're not) and even Irridium'* aren't the best choice for supercharged. Copper is the way to go under boost.
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Old 06-18-2007, 08:25 AM   #8
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Thanks for all the replys I will have to send the Bosch plugs back to Bosch. The parts store won't take them back. But I went with the ac delco iridium plugs. Started right up!!!! LOL
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