Question about 1989 Cadillac Brougham

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I recently bought a 1989 Cadillac, shortly after driving it, the head gasket blew, it also has a dry lifter. My problem is the guy i got it from said that it is not the original engine. How do i know if this is true?

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Hello. I have a cadillac brougham 1989. as well. how i found out if my engine was original. I looked at the vin #. Mine has a Y included in the vin#. Y is 307 oldsmobile 8 cyl, 7 is 350 chevy. also there is a #9 Not sure if it is a 472. check what the firing order is on the engine you have. if it is counterclockwise its a 307 olds. if its clockwise its a 350 chevy or a 305 Vin# E. I strongly recomend that you buy a haynes repair book. it will help you alot. you an get it canadiantire (lilky have to order it) or go to

Posted on Feb 20, 2009

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Cadallic put several diferent engines in the 80s cars because of the EPA if I remember correctly. (I may be wrong)
you can tell what type of engine you should have by the vehicle vin number
V-6 is vin number -4
V8s(472,500,425 and 368 vin numbers RST( and ^
5.& (chev) vin number-7
5.0 (307 olds) vin number-Y
if you get under the car there will be a number stamped on the engine over the oil pan area.
you can match that to the Vin number on the car bottom of windshield or under the hood on the fire wall or in the area of the radiator i believe.
then if these match you may have to check a dealership or write to cadallic for the exact engine or have a knowledgeable person with cads tell you what it is.(this is what I did)

Posted on Nov 22, 2008


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