Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Mercury Cougar LSFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Refrigerant | 2.25 LBS. | 1.02 KG | R-12 | S | |||
| Automatic Transmission Fluid | 9.50 QTS. | 8.99 L | Automatic Transmission Fluid MERCON | S | |||
| Brake Fluid | N/A | N/A | DOT 3 Brake Fluid | Fill to line on reservoir. | S | ||
| Differential Gear Oil | Rear Axle,7.5" Conventional | 3.00 PTS. | 1.41 L | FORD Hypoid Gear Oil | S | ||
| Differential Gear Oil | Rear Axle,7.5" Traction-Lok | 2.75 PTS. | 1.3 L | FORD Hypoid Gear Oil | Add 4 oz. of Additive Friction Modifier (C8AZ-19B546-A). | S | |
| Differential Gear Oil | Rear Axle,8.8" Traction-Lok | 3.25 PTS. | 1.53 L | FORD Hypoid Gear Oil | Add 4 oz. of Additive Friction Modifier (C8AZ-19B546-A). | S | |
| Engine Coolant | Normally Aspirated | 11.60 QTS. | 10.97 L | 50/50 mixture of FORD Premium Cooling System Fluid and water | S | ||
| Engine Oil | 5.00 QTS. | 4.73 L | SAE 5W-30 Super Premium Motor Oil | S | |||
| Fuel Tank | 19.00 GALS. | 71.92 L | S | ||||
| Manual Transmission Fluid | 3.10 QTS. | 2.93 L | Automatic Transmission Fluid MERCON | S | |||
| Power Steering Fluid | 1.60 PTS. | 0.75 L | Automatic Transmission Fluid Type F | S | |||
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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