33 Cooling system parts are listed for the 1973 Citroen SM, in 3 part types, covering both the 2.7L V6 and the 3.0L V6. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1973 Citroen SM, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. All 33 listed parts are Coolant / Antifreeze (16 parts), Thermostat (14 parts) and Thermostat / Thermostat Housing / Water Outlet Seal (3 parts).
The 1973 Citroen SM was sold with both the 2.7L V6 and the 3.0L V6. All 33 parts on this page fit every engine.
The most listed brands for 1973 Citroen SM cooling system parts are MOTORAD (11 parts), PEAK (7 parts) and PRESTONE (5 parts), plus 4 more brands. Quality grades include Standard Replacement, Premium and Economy.
7 parts on this 1973 Citroen SM page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including FVP MV5050GAL (Coolant / Antifreeze) and MOTORAD 2034180 (Thermostat). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 1973 SM engines | AF3055 | 🇺🇸 US 🇨🇦 CA | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: all 1973 SM engines | MV5050GAL | 🇺🇸 US 🇨🇦 CA | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular Fits: all 1973 SM engines | AF3100 | 🇺🇸 US 🇨🇦 CA | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK Fits: all 1973 SM engines | BQA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE Fits: all 1973 SM engines | 719009 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 1973 SM engines | ZXG051 | 🇺🇸 US 🇨🇦 CA | G05 Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 1973 SM engines | AF2100 | 🇺🇸 US 🇨🇦 CA | All Vehicles10yr/300k mi | View on Amazon |
| PEAK Fits: all 1973 SM engines | PKP1GAL | 🇺🇸 US 🇨🇦 CA | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK Fits: all 1973 SM engines | PXA1GAL | 🇺🇸 US 🇨🇦 CA | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE Fits: all 1973 SM engines | AFMAX | 🇺🇸 US 🇨🇦 CA | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: all 1973 SM engines | GREEN5050GAL | 🇺🇸 US 🇨🇦 CA | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK Fits: all 1973 SM engines | BMA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1973 SM engines | RUA1GAL | 🇺🇸 US 🇨🇦 CA | Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1973 SM engines | FFA1GAL | 🇺🇸 US 🇨🇦 CA | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1973 SM engines | SEP1GAL | 🇺🇸 US 🇨🇦 CA | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE Fits: all 1973 SM engines | AF3300 | 🇺🇸 US 🇨🇦 CA | Prime Conventional Green 1 Gallon | View on Amazon |
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.
16 Coolant / Antifreeze parts for the 1973 Citroen SM come from 4 brands — PEAK, PRESTONE, FVP and 1 other brand. The "Popular" part is FVP MV5050GAL. Every part fits both the 2.7L V6 and the 3.0L V6.
In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.
The Economy section lists 4 options from FVP, PRESTONE, PEAK and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.
In the Heavy Duty grade, VALVOLINE supplies 1 part: rated for severe service. A representative part number is VALVOLINE ZXG051.
In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, PEAK, FVP and PRESTONE supply 6 parts: built to original-equipment specification. A representative part number is FVP GREEN5050GAL.
Thermostat
Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: all 1973 SM engines | 2034180 | 🇺🇸 US 🇨🇦 CA | High Flow | View on Amazon |
| MOTORAD Fits: all 1973 SM engines | 2034160 | 🇺🇸 US 🇨🇦 CA | High Flow | View on Amazon |
| MOTORAD Fits: all 1973 SM engines | 2034192 | 🇺🇸 US 🇨🇦 CA | High Flow | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: all 1973 SM engines | 7234192 | 🇺🇸 US 🇨🇦 CA | Fail-Safe | View on Amazon |
| MOTORAD Fits: all 1973 SM engines | 7234180 | 🇺🇸 US 🇨🇦 CA | Fail-Safe | View on Amazon |
| MOTORAD Fits: all 1973 SM engines | 7234160 | 🇺🇸 US 🇨🇦 CA | Fail-Safe | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: all 1973 SM engines | 234192 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| MOTORAD Popular Fits: all 1973 SM engines | 234160 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| CALORSTAT Fits: all 1973 SM engines | TH456171J | 🇺🇸 US 🇨🇦 CA | PerformanceIncludes 1 Rubber Gasket | View on Amazon |
| CALORSTAT Fits: all 1973 SM engines | TH456187J | 🇺🇸 US 🇨🇦 CA | PerformanceIncludes 1 Rubber Gasket | View on Amazon |
| GATES Fits: all 1973 SM engines | 33208 | 🇺🇸 US 🇨🇦 CA | OE Type | View on Amazon |
| GATES Fits: all 1973 SM engines | 33209 | 🇺🇸 US 🇨🇦 CA | OE Type | View on Amazon |
| MOTORAD Fits: all 1973 SM engines | 234180 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| MOTORAD Fits: all 1973 SM engines | 234174 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
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.
14 Thermostat parts are listed for the 1973 Citroen SM, from MOTORAD, CALORSTAT and GATES. MOTORAD 2034180 carries the "Popular" badge. All of them fit every engine offered in the 1973 SM.
In the Performance grade, MOTORAD supplies 3 parts: engineered beyond original-equipment specification. A representative part number is MOTORAD 2034180.
The Premium section: 3 options from MOTORAD. MOTORAD 7234192 is listed in this group.
The Standard Replacement section: 8 options from MOTORAD, CALORSTAT and GATES. MOTORAD 234192 is listed in this group.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: all 1973 SM engines | 34030 | 🇺🇸 US 🇨🇦 CA | Thermostat Gasket - 3 1/4" x 3 1/2" Gasket Material | View on Amazon |
| GATES Fits: all 1973 SM engines | 33635 | 🇺🇸 US 🇨🇦 CA | Thermostat Gasket - 4" x 6" Gasket Material | View on Amazon |
| MOTORAD Fits: all 1973 SM engines | MG30 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
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.
3 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 1973 Citroen SM come from 2 brands — GATES and MOTORAD. Every part fits both the 2.7L V6 and the 3.0L V6.
Listed part numbers: GATES 34030, GATES 33635 and MOTORAD MG30.
Buying Cooling System Parts for a 1973 Citroen SM
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- You do not need to pick an engine: every cooling system part on this page fits both the 2.7L V6 and the 3.0L V6.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Thermostat .
Frequently Asked Questions
How many cooling system parts fit the 1973 Citroen SM?
Our catalog currently lists 33 cooling system parts for the 1973 Citroen SM across 3 subcategories and 7 brands, covering both the 2.7L V6 and the 3.0L V6. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 1973 Citroen SM engines?
No. On this page every cooling system part fits both the 2.7L V6 and the 3.0L V6. You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of cooling system problems on a 1973 Citroen SM?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1973 Citroen SM was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1973 Citroen SM?
Every part on this page already fits both the 2.7L V6 and the 3.0L V6. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1973 Citroen SM
Cooling System Parts for Other Citroen SM Years
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