rb20 SILVER TOP YEAR IDENT

[stilettoman]

I have a 1992 silver top which I installed in my RX-7. The timing cover has no markings. Some photos show the "RB20" stamped in large letters on the timing cover.
Can anyone tell me if there is a range of years that have this? I am looking at an engine for sale which has these letters embossed on the timing cover, but the owner does not know the year.

http://www.cardomain.com/ride/3936025/1984-mazda-rx-7

[danielmcn]

The last 1-2 years did not have the rb20 stamped on the cover. IIRC I know the later ones did not have it, but it really does not matter cause there are no major differences between the r32 (r31 rb20 are way different) ones with and the ones without the stamp. I really think the only difference is the stamp...