Production date / Engine question
07-17-2017, 10:16 AM
#1
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Thread Starter
Production date / Engine question
I have a 91 C4. Curious as to the date in which they changed over to the motor with head gaskets.
My car was manufactured in December of '90. From reading Adrian's book and a few other places it appears the M series (1) ran from May 1990 to October 1990. M series (2) ran from November 1990 to July 1991.
Is the M series (2) the revised engine with head gaskets?
Would my '91 be considered a late run '91 since it falls in the M (2) series?
Shot of my C4
My car was manufactured in December of '90. From reading Adrian's book and a few other places it appears the M series (1) ran from May 1990 to October 1990. M series (2) ran from November 1990 to July 1991.
Is the M series (2) the revised engine with head gaskets?
Would my '91 be considered a late run '91 since it falls in the M (2) series?
Shot of my C4
07-17-2017, 12:43 PM
#5
RL Technical Advisor
I have a 91 C4. Curious as to the date in which they changed over to the motor with head gaskets.
My car was manufactured in December of '90. From reading Adrian's book and a few other places it appears the M series (1) ran from May 1990 to October 1990. M series (2) ran from November 1990 to July 1991.
Is the M series (2) the revised engine with head gaskets?
Would my '91 be considered a late run '91 since it falls in the M (2) series?
Shot of my C4
My car was manufactured in December of '90. From reading Adrian's book and a few other places it appears the M series (1) ran from May 1990 to October 1990. M series (2) ran from November 1990 to July 1991.
Is the M series (2) the revised engine with head gaskets?
Would my '91 be considered a late run '91 since it falls in the M (2) series?
Shot of my C4
Beautiful car!
The only way to determine whether your engine has head gaskets or not is by VIN (or taking it apart).
07-17-2017, 06:56 PM
#7
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Thread Starter
Well it appears that my car does have the revised motor with head gaskets. I was able to see the engine number, only dropped my iPhone once trying to shine the light on it...