: Northstar Engine Swap. Has any1 Done it?

08-20-06, 02:41 PM
I got a 67 chevy that needs a motor and I have a wrecked 98 deville that has a good northstar in it. My dad told me anything is possible so now Im takin da motor out and was wondering if any1 has any tips or just some info on doing this, like what extras will I need or anything like that

08-20-06, 08:31 PM
I've done it. The stock computer will not run outside of a cadillac, but I can supply you with a programmable computer for cheap.

The northstar has a GM 60 degree v6 bolt pattern, so you want a tranny that will bolt up to that. One of the bolt holes will be 1" off, so you'd need an adapter for that one hole.

Other than that, it's pretty straight forward.

08-20-06, 09:40 PM
Eldorado1, even though I'm not planning it I'm interested in the results. Were you happy? Power OK? Torque OK? Other comments? Which model did you use? 275 or 300HP?

Got a web page with info on it?

08-20-06, 10:19 PM
Absolutely happy. But now I've got a craving for more...


08-21-06, 08:33 AM
Not sure with a longitudinal engine, but with a transverse stickshift you will need to grind out some webbing in the bellhousing to clear the starter. and of course you'll need to buy a flywheel and clutch. I believe that aluminum flywheels are available. Maybe you could use some of the stuff from the cadillac longitudinal system.

08-21-06, 07:51 PM
you might want to remind that yours is OBD1
His is OBD2
not a real big deal but it does matter

08-21-06, 09:40 PM
OBDI computer.

OBDII engine. (well, 95 engine with a 96+ throttle body/intake)

Cadi Homer
08-22-06, 02:00 PM
Don't mean to steal the thread.... however, I have a 1997 Cadillac DeVille with a blown engine and I was looking to replace my old engine with a 2001 engine because the pre-2000 Northstar engines seem to have a head gasket issue. Would you guys see any problem in dropping a post 2000 Northstar engine on my 97 DeVille?? Both engines have the vin code of "Y". Any advice is greatly appreciated!!!!


08-22-06, 09:36 PM
It can be done but the electronics/sensors are quite different. Someone did it a year or more ago and had to figure everything out. Used the old sensors but had to modify some of them.

They didn't post any instructions, just gave info in a few posts.

STS 310
08-24-06, 06:46 PM
Ya know know its too bad the "BOBSTER" isnt around anymore. These types of threads were answered with the utmost knowledge and explanation.


08-24-06, 06:53 PM
Check this out: