Question about 1990 Cadillac SeVille

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Engine serial number

My original engine with 150,000km on it was swapped when the car was in a repair facility for 3 weeks because of a miss.The replacement engine has the serial number "*6JU817563" on it on a tag on lower left on block next to bell housing. Nobody can figure the serial number out, hope you can help. Need the year and specs of it please.

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  • Cadillac Master
  • 3,103 Answers

It would have been helpful if the cars vin number was written on a tag attatched to this replacement motor..then you would have a better chance of an id..most blocks have a flat space on the edge of where the head bolts on that has a number stamped into it.. thats the block number you are looking for..

Posted on Dec 26, 2013

Testimonial: "This engine serial # plate is exactly where the Service Manual says it should be,rivetted with special rivets to the block. Changing this plate for a VIN # plate would be highly illegal, besides this engine was swapped without my knowledge, I found this out afterwards. So there are some legal proceedings ahead...I need to know the origin of the engine they put in; it maybe a stolen one"

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SOURCE: Can't remove Heater blower moter, the Engine valve

Had the same problem. Figured the worst part was that the blower motor itself was $400 when I got it just above cost. According to the repair manual, you have to take the engine out. F that. I just cut the casing for the blower motor, (very neatly) then sealed it up again with epoxy.
Make 2 cuts that run from front to back, and bend it back towards the firewall. Not the prettiest, but not noticeable unless you look right at it. Blower works fine now, and that's the main point.

Posted on Jul 20, 2009

ftw1952
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SOURCE: 2002 cadillac seville

this has happened to many northstar engines and no suits have been filed and won so far as I know. If you are a regular Cadillac customer that has purchased 2 or more Cadillac's in the past decade I would call the 800 number as shown in the owners manual and file a complaint. The loader you are the better for you. They do take care of their customers in all cases I have heard and seen quite a few in my years at the dealership I worked at

Posted on Aug 19, 2010

emissionwiz
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SOURCE: I drive a 2006 dts which i've had for 1 year. A week after I had the car the temperature gauge went to red when I was in traffic. I took it to cadillac, they replaced the engine,radiator and hoses

Temp is going up, well that doesn't mean anything unless it actually overheats, in traffic it can reach 240 F and present no danger of engine damage. If this is not the case DO NOT DRIVE THIS UNTIL THE PROBLEM IS FOUND AND REPAIRED UNLESS YOU WANT TO BUY ANOTHER ENGINE JOB.

Posted on Aug 23, 2012

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For instance.. My timing belt broke and ruined my engine so i took it to my best friends import tuning shop and had him do an engine swap, no big deal, altho my receipt from his shop is THE ONLY way anyone would ever know that i swapped unless i told them. I did the right thing and had it added to my car's "history" when I replaced recalls at the dealership but even the dealership couldn't tell my engine was not the original and your dealership COULD tell, so man.. you need to contact the ppl that sold you the car, because lawfully you are due a refund or at the very least an intense history report of when they or any other previous owners had the car. Also the dealership is completely correct in that there is definitely a code on that tab coming off the cylinder head.. and if it has been milled off, it was milled for a reason, to hide something obviously so contact your previous owner (get it off the title if you forgot who they are) ask them everything they know about the engine, you'll be able to tell if they are honest.. and if they know nothing, then next step is contacting the shop that changed the timing belt and tell them you want answers to what happened to your "original" engine. This is a tough one..

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