99 Deville Motor Swap Help

[96DEVILLE]

I Have A 99 Deville Concours Which Needs A Motor .can I Use A Motor From A Seville Or Eldorado.. I Know That A Deville Motor Won T Go Into A Concours.. The Deville Has The Letter (y) In The Vin .someone Told Me I Can T Use That Motor In A Con. Does Any One Know For Sure...... Thanks For The Help....

[caddydaddy]

You will need to replace your engine with a L37 or VIN 9 engine. And it must be from a 1996-1999 car. So your choices are an ETC, STS or Deville Concours from those years.
What is wrong with the current engine?

[96DEVILLE]

my car runs hot. i changed water pump,hoses, belt, cooling fan turn on and seem strong. then when i turn car off it over flows...this car has a temp. gage the needle goes from norm. to just before the red then goes back to norm..bafore this problem needle stayed at norm. and never moved...

thanks for help

[caddydaddy]

Have you checked for a blown headgasket? NAPA sells a coolant test kit that checks for hydrocarbons in the cooling system. It's around $50. If it is a blown head gasket, have you considered fixing it, instead of replacing the engine?
Also, GM now sells rebuilt Northstars.

[DFBonnett]

Have you ever replaced the thermostat?

[96DEVILLE]

Originally Posted by caddydaddy

Have you checked for a blown headgasket? NAPA sells a coolant test kit that checks for hydrocarbons in the cooling system. It's around $50. If it is a blown head gasket, have you considered fixing it, instead of replacing the engine?
Also, GM now sells rebuilt Northstars.

YES BUT I WAS TOLD THAT YOU CAN T FIX HEADGASKETS ON NORTHSTAIR... BECAUSE OF HEAD BOLTS THERE S NO WATER IN OIL OR WHITE SMOKE NO SIGN OF ANTI FREEZE ON SPARK PLUGS....

[96DEVILLE]

Originally Posted by DFBonnett

Have you ever replaced the thermostat?

YES TWICE

[maxwedge]

This does not belong in the open forums, I am moving this to the parts/cars, sale exchange.