The 1981 Triumph TR7 has 53 cooling system parts with verified fitment on this page — 7 part types and 16 brands, covering the 2.0L L4 engine. Each part includes a manufacturer part number and application notes.
On the 1981 Triumph TR7, 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. 38 parts of the 53 listed are Coolant / Antifreeze (16 parts), Thermostat (14 parts) and Temperature Sender / Sensor (8 parts). The other 4 part types cover the remaining 15 parts.
The 1981 Triumph TR7 came with a single engine, the 2.0L L4, and every part is verified against it.
16 brands supply cooling system parts for the 1981 Triumph TR7, led by MOTORAD (15 parts), PEAK (7 parts) and PRESTONE (5 parts), plus 13 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1981 Triumph TR7. 12 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and DAYCO 81051 (Radiator Hose). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇺🇸 US 🇨🇦 CA | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | MV5050GAL | 🇺🇸 US 🇨🇦 CA | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular | AF3100 | 🇺🇸 US 🇨🇦 CA | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE | 719009 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | ZXG051 | 🇺🇸 US 🇨🇦 CA | G05 Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US 🇨🇦 CA | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇺🇸 US 🇨🇦 CA | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇺🇸 US 🇨🇦 CA | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US 🇨🇦 CA | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | GREEN5050GAL | 🇺🇸 US 🇨🇦 CA | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK | BMA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK | RUA1GAL | 🇺🇸 US 🇨🇦 CA | Conventional Green1 Gallon | View on Amazon |
| PEAK | FFA1GAL | 🇺🇸 US 🇨🇦 CA | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK | SEP1GAL | 🇺🇸 US 🇨🇦 CA | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE | 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 are listed for the 1981 Triumph TR7, 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 4 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.
Cooling System Tester Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 12A01 | 🇺🇸 US 🇨🇦 CA | ProfessionalIncluded In Tester | View on Amazon |
| MOTORAD | 3003 | 🇺🇸 US 🇨🇦 CA | StandardIncluded In Tester Kit | View on Amazon |
This table covers the adapters used to pressure-test this cooling system.
2 Cooling System Tester Adapter parts are listed for the 1981 Triumph TR7, from ACDELCO and MOTORAD.
This group includes ACDELCO 12A01 and MOTORAD 3003.
Radiator Cap
Locking Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | ST16 | 🇺🇸 US 🇨🇦 CA | Safety Lever | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | T16 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
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.
MOTORAD supplies both parts for the 1981 Triumph TR7.
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.
This group includes MOTORAD ST16 and MOTORAD T16.
Radiator Hose
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular | 81051 | 🇺🇸 US 🇨🇦 CA | Flex Radiator Hose | View on Amazon |
| GATES Popular | 25255 | 🇺🇸 US 🇨🇦 CA | Flexible | View on Amazon |
| ACDELCO | 31614 | 🇺🇸 US 🇨🇦 CA | Gold / ProfessionalFlexible | View on Amazon |
| CONTINENTAL | 52017 | 🇺🇸 US 🇨🇦 CA | FlexibleDoes Not include seals | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO | 70949 | 🇺🇸 US 🇨🇦 CA | Curved | View on Amazon |
| DAYCO | 70950 | 🇺🇸 US 🇨🇦 CA | Curved | View on Amazon |
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.
6 Radiator Hose parts for the 1981 Triumph TR7 come from 4 brands — DAYCO, GATES, ACDELCO and 1 other brand. The "Popular" part is DAYCO 81051.
The Economy section: 4 options from DAYCO, GATES, ACDELCO and 1 other brand. DAYCO 81051 is listed in this group.
Standard Replacement: 2 parts, from DAYCO. A representative part number is DAYCO 70949.
This group includes DAYCO 81051, GATES 25255 and ACDELCO 31614 and the remaining parts above.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Popular | SKTX18 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS Popular | TX18T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| UNITED MOTOR PRODUCTS | CTS13 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 2011110 | 🇺🇸 US 🇨🇦 CA | Switch | View on Amazon |
| FOUR SEASONS | 36413 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | TX18 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | TS226 | 🇺🇸 US 🇨🇦 CA | with Gauge | View on Amazon |
| WELLS | 1T1159 | 🇺🇸 US 🇨🇦 CA | with Gauge | View on Amazon |
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.
8 Temperature Sender / Sensor parts are listed for the 1981 Triumph TR7, from STANDARD MOTOR PRODUCTS, SKP, UNITED MOTOR PRODUCTS and 3 other brands. SKP SKTX18 carries the "Popular" badge.
Economy: 3 parts, from SKP, STANDARD MOTOR PRODUCTS and UNITED MOTOR PRODUCTS. A representative part number is SKP SKTX18.
The Standard Replacement section: 5 options from STANDARD MOTOR PRODUCTS, BECK/ARNLEY, FOUR SEASONS and 1 other brand. BECK/ARNLEY 2011110 is listed in this group.
This group includes SKP SKTX18, STANDARD MOTOR PRODUCTS TX18T and UNITED MOTOR PRODUCTS CTS13 and the remaining parts above.
Thermostat
Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular | 2028180 | 🇺🇸 US 🇨🇦 CA | High Flow | View on Amazon |
| MOTORAD Popular | 2028160 | 🇺🇸 US 🇨🇦 CA | High Flow | View on Amazon |
| MOTORAD | 2028170 | 🇺🇸 US 🇨🇦 CA | High Flow | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | 7228180 | 🇺🇸 US 🇨🇦 CA | Fail-SafeIncludes seal | View on Amazon |
| MOTORAD | 7228160 | 🇺🇸 US 🇨🇦 CA | Fail-SafeIncludes seal | View on Amazon |
| MOTORAD | 7228170 | 🇺🇸 US 🇨🇦 CA | Fail-SafeIncludes seal | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular | 228195 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| BECK/ARNLEY | 1430701 | 🇺🇸 US 🇨🇦 CA | OE TemperatureGasket/Seal Not Included | View on Amazon |
| BECK/ARNLEY | 1430702 | 🇺🇸 US 🇨🇦 CA | Alternate TemperatureGasket/Seal Not Included | View on Amazon |
| GATES | 33188 | 🇺🇸 US 🇨🇦 CA | OE Type | View on Amazon |
| GATES | 33189 | 🇺🇸 US 🇨🇦 CA | OE Type | View on Amazon |
| MOTORAD | 228160 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| MOTORAD | 228170 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| MOTORAD | 228180 | 🇺🇸 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 for the 1981 Triumph TR7 come from 3 brands — MOTORAD, BECK/ARNLEY and GATES. The "Popular" part is MOTORAD 2028180.
The Performance section lists 3 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2028180 is listed in this group.
Premium: 3 parts, from MOTORAD. A representative part number is MOTORAD 7228180.
Standard Replacement: 8 parts, from MOTORAD, BECK/ARNLEY and GATES. A representative part number is MOTORAD 228195.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular | 33624 | 🇺🇸 US 🇨🇦 CA | Thermostat Gasket - 1 27/32" | View on Amazon |
| BECK/ARNLEY | 0390001 | 🇺🇸 US 🇨🇦 CA | Thermostat Seal | View on Amazon |
| FEL-PRO | 25636 | 🇺🇸 US 🇨🇦 CA | Type: Water Outlet GasketUse: Water Outlet | View on Amazon |
| MOTORAD | MG38 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MOTORAD | MG91EA | 🇺🇸 US 🇨🇦 CA | Type: Grooved | 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.
5 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1981 Triumph TR7, from MOTORAD, GATES, BECK/ARNLEY and 1 other brand. GATES 33624 carries the "Popular" badge.
Listed part numbers: GATES 33624, BECK/ARNLEY 0390001 and FEL-PRO 25636, plus the other parts above.
Buying Cooling System Parts for a 1981 Triumph TR7
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.
- Confirm you have the 2.0L L4 engine — every part on this page is matched to it.
- 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 1981 Triumph TR7?
Our catalog currently lists 53 cooling system parts for the 1981 Triumph TR7 across 7 subcategories and 16 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 1981 Triumph TR7?
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 1981 Triumph TR7 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 1981 Triumph TR7?
Every part on this page is matched to the 2.0L L4 engine. 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 1981 Triumph TR7
Cooling System Parts for Other Triumph TR7 Years
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