Where is the EGR valve located on an 89 Oldsmobile delta 88 and it hard to change?

The EGR valve on an 89 Oldsmobile Delta 88 is typically located on the intake manifold, near the back of the engine. Its exact position can vary slightly depending on the engine (3.8L V6 or the less common 5.0L V8). You'll probably find it near where the exhaust manifold meets the intake.

Difficulty of Replacement:

The difficulty of replacing the EGR valve itself isn't usually excessively hard *mechanically*, but accessing it on an older car like a Delta 88 can be the real challenge. Things that can make it difficult include:

* Limited space: The engine bay in older cars can be cramped, making it tough to maneuver tools and your hands.

* Rust and corrosion: After 30+ years, bolts might be seized or rusted, requiring extra effort (or even specialized tools) to remove. Vacuum lines may also be brittle.

* Heat: The area around the EGR valve gets extremely hot, requiring the engine to be completely cool before working on it.

* Vacuum lines: Disconnecting and reconnecting vacuum lines carefully is crucial to avoid leaks and improper operation.

In short: While the valve replacement is a relatively straightforward procedure itself, the access and potential for seized fasteners make it moderately difficult for someone without mechanical experience. If you're uncomfortable working on cars, it's best to take it to a mechanic. They have the tools and experience to handle any complications that might arise.