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.

Both the '95 3800 and the '02 3800 use the same spark plug. Autolite #606 or equivilent.

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.

Went with Delco Iridiums when mine needed it. No troubles!

Very good alert & reminder

My 96 ate the Bosch plugs.

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.

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