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How do you tell if engine is original?

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Old Oct 5, 2002 | 03:09 PM
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How do you tell if engine is original?

Has anyone confirmed that this is true?

Posted a while ago by Gordon Monsen:
the way to see if its your original motor or not is to look underneath the alternator. there will be a number stamped there that begins with "E" and is followed by six numbers ("Exxxxxx") where those numbers equate to your car's VIN number. makes it simple to see if an engine has been replaced or not. -gordon
https://www.rx7club.com/forum/showth...or+is+original


I would swear that my car has the original engine, but the numbers stamped on my water pump housing do not match the VIN number. And I have all the Mazda service records, and Mazda never put another engine in it.

It seems like no matter what adjustments I make to the idle, it is never right, and my vacuum is low (10 to 12 inches at idle). I'm wondering if I have a street port or something.
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Old Oct 5, 2002 | 03:35 PM
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rynberg's Avatar
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That is true, the engine should have the VIN stamping. You do not have an original engine if they don't match.
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Old Oct 5, 2002 | 03:40 PM
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I dont understand how can you not have the original motor?? You cant get a "new" motor, you have to have a rebiuld. Or unless you give them your block and they just give you a rebiult motor??
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Old Oct 5, 2002 | 05:02 PM
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I dont understand how can you not have the original motor?? You cant get a "new" motor, you have to have a rebiuld. Or unless you give them your block and they just give you a rebiult motor??
You can buy remanufactured engines from Mazda. You don't *have* to get the one in the car rebuilt.
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Old Oct 5, 2002 | 10:27 PM
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From: https://www2.mazda.com/en/100th/
that number will not match the vin on the car. it will appear on a waranty printout, however. you need to go to the dealer and have them run a warranty report

mike
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Old Oct 5, 2002 | 11:40 PM
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Have you ran a carfax on you VIN to see if she was in any major accidents etc... .

Perhaps that will tell you something, not sure though.
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Old Oct 6, 2002 | 01:46 AM
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Originally posted by 93redFD
I dont understand how can you not have the original motor?? You cant get a "new" motor, you have to have a rebiuld. Or unless you give them your block and they just give you a rebiult motor??
Don't forget that when FDs were pretty new, if you blew an engine, you would get a new one from Japan put in under warranty.
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Old Oct 6, 2002 | 11:53 AM
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so could we not get engines from japan 95-99??? Was 1999 the last year they made the fd's in japan???
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Old Oct 6, 2002 | 12:41 PM
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Originally posted by mblachford
Have you ran a carfax on you VIN to see if she was in any major accidents etc... .

Perhaps that will tell you something, not sure though.
I ran a carfax on my 94 prior to purchase. It said nothing about the major wreck the car had been in prior to purchase. Fortunately, the pre-purchase inspection uncovered the facts.

I bought the car anyway because the mech said that it had been put back together very will and was a strong car. I have not regretted the decision to buy in the three years I have owned it, but I would certainly not rely on carfax alone.
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Old Oct 6, 2002 | 03:56 PM
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that number will not match the vin on the car. it will appear on a waranty printout, however. you need to go to the dealer and have them run a warranty report
This is correct! I pulled out my warranty sheet and it has my engine number, which matches the number stamped on my water pump housing. So I do have an original engine, with almost 91K on the clock.
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Old Oct 6, 2002 | 04:16 PM
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Originally posted by paw140


This is correct! I pulled out my warranty sheet and it has my engine number, which matches the number stamped on my water pump housing. So I do have an original engine, with almost 91K on the clock.
Any idea how to get this information if you are not the original owner and have no warranty?
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Old Oct 6, 2002 | 05:43 PM
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I'm not the original owner of the car. You can get this info from a Mazda dealer.
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Old Oct 6, 2002 | 06:17 PM
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if they have done the service work, they can pull info by the vin......that's how i found out the ast and upper rad hose were replaced right before i bought it......also found out 5k miles later the motor started puking coolant.

bought it, put 5k miles on it, parked it.......since novenber!
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Old Oct 7, 2002 | 09:34 PM
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Sorry Dude, that hurts.
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