1978 MG Midget Cooling System Parts

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

17 Coolant / Antifreeze parts are listed for the 1978 MG Midget, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PRESTONE, PEAK and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Heavy Duty section lists 1 option from VALVOLINE — rated for severe service. VALVOLINE ZXG051 is listed in this group.

The Premium section lists 5 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 6 options from PEAK, FVP and PRESTONE — built to original-equipment specification. FVP GREEN5050GAL is listed in this group.

This table covers the adapters used to pressure-test this cooling system. Read more

2 Cooling System Tester Adapter parts are listed for the 1978 MG Midget, from ACDELCO and MOTORAD.

Part numbers include ACDELCO 12A01 and MOTORAD 3003.

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

MOTORAD supplies both parts for the 1978 MG Midget.

The Locking Replacement section lists 1 option from MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. MOTORAD ST16 is listed in this group.

The Standard Replacement section: 1 option from MOTORAD. MOTORAD T16 is listed in this group.

Listed part numbers: MOTORAD ST16 and MOTORAD T16.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

5 Radiator Hose parts for the 1978 MG Midget come from 3 brands — ÜRO PARTS, DAYCO and CONTINENTAL. The "Popular" part is DAYCO 70687.

Part numbers include DAYCO 70687, CONTINENTAL 60138 and ÜRO PARTS GRH623, among others listed above.

This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender. Read more

3 Temperature Sender / Sensor parts are listed for the 1978 MG Midget, from BECK/ARNLEY, ROSTRA and STANDARD MOTOR PRODUCTS.

Part numbers include BECK/ARNLEY 2011110, ROSTRA 680107 and STANDARD MOTOR PRODUCTS TS233.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

25 Thermostat parts for the 1978 MG Midget come from 3 brands — MOTORAD, GATES and BECK/ARNLEY. The "Popular" part is MOTORAD 2000160.

The Economy section: 5 options from MOTORAD and GATES. GATES 33508 is listed in this group.

Heavy Duty: 3 parts, from MOTORAD. A representative part number is MOTORAD 5200160.

The Performance section lists 4 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2000160 is listed in this group.

Premium: 3 parts, from MOTORAD. A representative part number is MOTORAD 7200180.

Standard Replacement: 10 parts, from MOTORAD, BECK/ARNLEY and GATES. A representative part number is MOTORAD 200195.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

6 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1978 MG Midget, from FEL-PRO, GATES, BECK/ARNLEY and 3 other brands. FEL-PRO 25538 carries the "Popular" badge.

Part numbers include FEL-PRO 25538, GATES 33655 and BECK/ARNLEY 0390001, among others listed above.