The 1985 Buick Riviera, a car that oozes 80s charm, holds a special place in many hearts. But let’s face it, time waits for no machine, and sometimes those classic engines need a little pep in their step. Today, we’re diving into a popular upgrade for the Riviera – swapping out the original powerplant for a robust 350.
The 350 Swap: A Match Made in Automotive Heaven
Good news, fellow gearheads! The 350 engine is a near-perfect match for the Riviera, slotting in with minimal fuss. Think of it like fitting a comfortable, familiar glove (albeit a glove with a few extra horses under the hood).
Here’s a rundown of what you need to know:
Essential Parts and Modifications:
- Flexplate: Unlike its rear-wheel-drive siblings, the Riviera’s 307 engine, paired with the TH325L4 transmission, uses a unique flexplate. This needs to be transferred to your 350.
- Oil Pan and Pickup: Stick with the front-wheel-drive oil pan and pickup from your 307.
- Water Pump and Accessories: The 307’s water pump, pulley, and accessory bracket setup are a direct fit onto the 350, ensuring perfect alignment.
- Exhaust Manifolds: You’ll need the front-wheel-drive exhaust manifolds from the 307 for a seamless fit.
- Oil Filter Adapter: The Riviera’s unique oil filter angle requires a specific adapter. Grab the one from the 307 and be prepared to source the correct gasket, which can be a bit tricky to find.
- ECU Considerations: Deleting the ECU simplifies things but brings a few consequences. Lockup torque converter functionality will be lost, and you might consider an aftermarket lockup kit. Additionally, the evaporative emissions purge system, reliant on the ECU, will need a workaround. Lastly, without the ECU-controlled cooling air to the converter, consider an aftermarket converter to prevent potential meltdown issues.
Words of Wisdom from a Seasoned Mechanic
“I’ve seen countless Riviera owners revitalize their rides with the 350 swap,” shares John, a veteran mechanic with over 20 years of experience. “It’s a relatively straightforward swap that injects a healthy dose of power and reliability. Just remember those unique front-wheel-drive components, and you’ll be cruising in style in no time.”
Ready to Unleash the Riviera’s True Potential?
There you have it – a glimpse into the world of breathing new life into your 1985 Buick Riviera with a 350 engine swap. It’s a project that blends classic charm with modern muscle, and with the right knowledge and a touch of elbow grease, you can experience the thrill of this iconic car like never before.
Let us know in the comments below if you have any questions or stories about your own Riviera adventures! And don’t forget to share this guide with fellow car enthusiasts who might be considering this rewarding upgrade.