What kind of motor do I have??

cre · 07-03-2012, 11:09 PM

The 6M came in a couple different cars but none which came to the US with it. It was the last engine in the MKII lineage. The 6M crank is lighter and allows for a higher red line than the 7M crank. The 7M crank is heavier and better balanced but comes with the penalty of a 250 RPM reduction in red line. The 7M crank started making its way into the 7M engine around '88 but through '89 (possibly '90) it was possible to end up with either one in your 7M. The first telltale sign was the red line as indicated by the red mark on the tachometer face. Naturally, you can't rely on that so much these days though as the gauge could have been swapped anytime in the past.

07-03-2012, 11:09 PM	#7
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The 6M came in a couple different cars but none which came to the US with it. It was the last engine in the MKII lineage. The 6M crank is lighter and allows for a higher red line than the 7M crank. The 7M crank is heavier and better balanced but comes with the penalty of a 250 RPM reduction in red line. The 7M crank started making its way into the 7M engine around '88 but through '89 (possibly '90) it was possible to end up with either one in your 7M. The first telltale sign was the red line as indicated by the red mark on the tachometer face. Naturally, you can't rely on that so much these days though as the gauge could have been swapped anytime in the past. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->