Different FC pulleys?

need RX7 · 01-08-2009, 09:59 PM

I bought a new main pulley for my S4, since mine was really rusty and the timing marks weren't visible. I ordered one from eBay that was supposedly off of an '86. I got it and compared it to my old one, the timing marks match up perfectly but the overall diameter is larger. When it is installed on the car the outer edge scrapes on the timing pointer. Did Mazda change the pulleys from S4 to S5? The one I had before is ~4 1/2" and the new one is ~4 3/4".

01-08-2009, 09:59 PM	#1
need RX7 Clean S4 Nutswinger Join Date: Mar 2008 Location: Sterling Heights, MI Posts: 485 Rep Power: 18	Different FC pulleys? I bought a new main pulley for my S4, since mine was really rusty and the timing marks weren't visible. I ordered one from eBay that was supposedly off of an '86. I got it and compared it to my old one, the timing marks match up perfectly but the overall diameter is larger. When it is installed on the car the outer edge scrapes on the timing pointer. Did Mazda change the pulleys from S4 to S5? The one I had before is ~4 1/2" and the new one is ~4 3/4". __________________ -Ted -1986 Mazda RX7 Sport [DD/beater]: engine finally let go at 205k. parts car status. -1986 Mazda RX7 base [resto-mod project]: S5 n/a swap in progress.