Either a 368 cid gas V8 or a 350 cid diesel V8.
~4,200 lbs
Rear
5x115
The blower motor relay on a 1980 Cadillac Coupe Deville is situated on the passenger side. It is located in the vicinity of the firewall and is just below the windshield.
It appears your blower motor is not working correctly on your 1980 Cadillac Coupe Deville. The vents are for both AC and heat. You may also be losing vacuum pressure. If you cannot find the source, your mechanic can help you do so.
Firing order for 1980 Cadillac Eldorado 6.0 Engine is 1,5,6,3,4,2,7,8.
Google Kelly Blue Book and enter in the information such as condition and mileage, it's your best bet for an estimate
What size engine?
0.35 gap
Yes, Cadillac offered a 4.1-liter V8 engine for the 1980 Eldorado. This engine was part of Cadillac's new line of smaller, more fuel-efficient engines introduced during that era. The 4.1-liter was designed to provide a balance of performance and efficiency, catering to changing market demands.
I got my fuse box daigram at Murrays' I bought a Chiltons Book for my 1989 Coupe Deville. It lists previous years also. You can probably have someone at Murray copy the diagram for you out of the book. They copied some things for me.
The timing for a 1980 Cadillac Coupe typically involves setting the ignition timing to the manufacturer's specifications, which is usually around 8-10 degrees BTDC (Before Top Dead Center) for the 5.7L V8 engine. Timing adjustments can be made using a timing light and should be done when the engine is at idle. It's essential to consult the vehicle's service manual for precise specifications and procedures.