Best Spark plugs for 270 Crusaders

AndyF32 · Post by **AndyF32** » Sun Nov 04, 2012 11:49 pm

I have 1990 Crusaders that need the plugs and wires replaced. Looking for opinions on which plugs run best in these engines.
Thanks

prowlersfish · Post by **prowlersfish** » Mon Nov 05, 2012 6:25 am

AC plugs work best in GM engines

Stripermann2 · Post by **Stripermann2** » Mon Nov 05, 2012 7:04 am

MR43T AC Delco. Marine spark plug. Don't use automotive plugs. The threaded casing will rust and could break off in cylinder head. Seen it many times...

prowlersfish · Post by **prowlersfish** » Mon Nov 05, 2012 7:20 am

Stripermann2 wrote:MR43T AC Delco. Marine spark plug. Don't use automotive plugs. The threaded casing will rust and could break off in cylinder head. Seen it many times...

X2 -

AndyF32 · Post by **AndyF32** » Mon Nov 05, 2012 10:39 am

Thanks! Gap is .030 I assume. Any preference on wires?

Stripermann2 · Post by **Stripermann2** » Mon Nov 05, 2012 11:48 am

Try Crusader part number, 97454 for the wires.

AndyF32 · Post by **AndyF32** » Tue Nov 06, 2012 9:30 pm

Thanks for all the info. I think I will spray some penetrating oil on the plugs that are in there now before I try to remove them. I was not aware of that corrosion issue with some plugs.