* Junkyards/Salvage Yards: This is often the most affordable option, but the condition of the engine can vary greatly. You'll need to inspect it carefully or buy from a reputable yard with a warranty. Online parts locators like Car-Part.com can help you find yards near you with Northstar engines in stock.
* Online Parts Retailers: Websites like eBay, Amazon, and specialized automotive parts sites may offer used or rebuilt Northstar engines. Be cautious and carefully check seller ratings and return policies. Look for details about the engine's history and condition.
* Engine Rebuilders: These specialists rebuild Northstar engines, offering a potentially more reliable option than a used engine. However, this will be the most expensive approach. You can find engine rebuilders through online searches or by asking at local auto repair shops.
* Cadillac Dealerships (unlikely): Dealerships are unlikely to have used engines, and new ones are not available as Northstar production ended years ago.
Before buying, carefully consider:
* Engine Condition: Look for signs of wear and tear, leaks, and damage. A compression test is highly recommended for used engines.
* Mileage: Lower mileage generally indicates better condition.
* Warranty: Check if the seller offers any warranty or guarantee.
* Shipping Costs: Shipping an engine can be expensive.
In short, junkyards and online marketplaces are your best bet for finding a used Northstar engine, while engine rebuilders offer a more expensive but potentially more reliable alternative. Remember to thoroughly research before committing to a purchase.