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DISCUSSION => Engine + Driveline => Topic started by: 91318isfoundation on July 07, 2008, 10:55:27 AM

Title: difference between motors
Post by: 91318isfoundation on July 07, 2008, 10:55:27 AM

whats the main difference between the 91 m42 and a 93 m42? becuaz i cracked the head on my 91 so ima just buy a used motor and i got another ecu with a chip for my 91 m42 will that chip work with the 93 m42?

Title: difference between motors
Post by: E30nate on July 07, 2008, 12:30:29 PM

there are only minor differences in the valvetrain. smaller valve stems is the only difference i think. and the intake manifold. use your old manifold and it all works perfect. my 91 has an engine from a 95 in it right now and it runs perfect.