Are these almost impossible to replace without removing the engine like on most Cadillac Northstar engines?

On an 02 Olds Intrigue

Its pretty tight in there might be some serious H*** ... Would be a lot easier on an engine stand

It's a PITA to simply get the cam covers off on one of these motors, imagine what it is removing heads too!

Simplest way to do it, have access to a lift, disconnect the car from the front subframe, disconnect all fuel, exhaust, and electrial from the body and lift whole car off the subframe, effectively seperating the powertrain from the car.

Yea, I know it's a different car, but very similar to how I did my Camaro when I built it's engine. I did it at work at the time.

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

That is pretty much what I figured...

Thanks as always!!

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1992 True Blue stock Bonneville SE
1996 Buick Regal Gran Sport