The 1978 Triumph TR7 has 20 engine parts with verified fitment on this page — 11 part types and 12 brands, covering the 2.0L L4 engine. Each part includes a manufacturer part number and application notes.
The engine on the 1978 Triumph TR7 covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. The largest groups are Oil Filter (5 parts), Crankshaft Repair Sleeve (4 parts) and Circular / Semi-Circular Plug (2 parts). The other 8 part types cover the remaining 9 parts.
Every part on this page is matched to the 2.0L L4 — the only engine offered in the 1978 Triumph TR7.
The most listed brands for 1978 Triumph TR7 engine parts are ITM ENGINE COMPONENTS (8 parts), TIMKEN (2 parts) and FEL-PRO (1 part), plus 9 more brands. Quality grades include Standard Replacement and Economy.
1 part on this 1978 Triumph TR7 page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — WIX 51184 (Oil Filter). Click any part number to see every vehicle that part fits.
Circular / Semi-Circular Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | CP75013 | 🇺🇸 US 🇨🇦 CA | RearValve Cover Camshaft Bore Plug | View on Amazon |
| VICTOR REINZ | 711349400 | 🇺🇸 US 🇨🇦 CA | Valve Cover | View on Amazon |
This table covers the Circular / Semi-Circular plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes.
2 Circular / Semi-Circular Plug parts are listed for the 1978 Triumph TR7, from FEL-PRO and VICTOR REINZ.
This group includes FEL-PRO CP75013 and VICTOR REINZ 711349400.
Conversion / Lower Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 0925605 | 🇺🇸 US 🇨🇦 CA | Set does Not contain engine Oil seals | View on Amazon |
This table covers lower / conversion gasket sets for oil-pan and related joints. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration.
This group shows a single part: ITM ENGINE COMPONENTS 0925605.
Crankshaft Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL | 99179 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| SCHAEFFLER | SR3500 | 🇺🇸 US 🇨🇦 CA | Front20.32 mm Width | View on Amazon |
| TIMKEN | KWK99179 | 🇺🇸 US 🇨🇦 CA | Kwik-Sleeve | View on Amazon |
| WJB / INMOTION PARTS | WS99179 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
This table covers the sleeves used to restore a grooved crankshaft seal surface.
4 Crankshaft Repair Sleeve parts are listed for the 1978 Triumph TR7, from NATIONAL, SCHAEFFLER, TIMKEN and 1 other brand.
This group includes NATIONAL 99179, SCHAEFFLER SR3500 and TIMKEN KWK99179 and the remaining parts above.
Crankshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 1559819 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| TIMKEN | 50266 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
This table covers the front and rear seals that keep oil in at the crankshaft. 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.
2 Crankshaft Seal parts are listed for the 1978 Triumph TR7, from ITM ENGINE COMPONENTS and TIMKEN.
Listed part numbers: ITM ENGINE COMPONENTS 1559819 and TIMKEN 50266.
Cylinder Head Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 0945605 | 🇺🇸 US 🇨🇦 CA | Graphite Composite Head Gasket | View on Amazon |
This table covers the head gaskets that seal the block to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
This group shows a single part: ITM ENGINE COMPONENTS 0945605.
Exhaust Valve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | RX34477 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the exhaust valves that let combustion gas out of the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one.
One part is listed for the 1978 Triumph TR7 — ITM ENGINE COMPONENTS RX34477.
Intake Valve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | RV9171 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one.
One part is listed for the 1978 Triumph TR7 — ITM ENGINE COMPONENTS RV9171.
Oil Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FAMOUS BRAND | 85184 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PUROLATOR | L14753 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WIX Popular | 51184 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HASTINGS / BALDWIN | LF187 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MANN | H8131X | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive.
5 Oil Filter parts are listed for the 1978 Triumph TR7, from FAMOUS BRAND, PUROLATOR, WIX and 2 other brands. WIX 51184 carries the "Popular" badge.
In the Economy grade, FAMOUS BRAND and PUROLATOR supply 2 parts: the catalog's value-priced group. A representative part number is FAMOUS BRAND 85184.
The Standard Replacement section lists 3 options from WIX, HASTINGS / BALDWIN and MANN — built to original-equipment specification. WIX 51184 is listed in this group.
This group includes WIX 51184, FAMOUS BRAND 85184 and PUROLATOR L14753 and the remaining parts above.
Oil Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 0995605 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the gaskets between the oil pan and the block. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
One part is listed for the 1978 Triumph TR7 — ITM ENGINE COMPONENTS 0995605.
Piston
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | RY6363 | 🇺🇸 US 🇨🇦 CA | Compression Ratio 8:1-3.5546 Inch (Size: 0.020" Oversize) | View on Amazon |
This table covers the pistons that travel in each cylinder. Typical signs include knock, blow-by, or a cylinder that will not hold compression. Piston work is a short-block job. Match bore, pin and ring pack in the notes — not the photo.
This group shows a single part: ITM ENGINE COMPONENTS RY6363.
Piston Ring
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 0216065 | 🇺🇸 US 🇨🇦 CA | 1.75 X 1.75 X 4mmSet | View on Amazon |
This table covers the rings that seal each piston to the cylinder wall.
This group shows a single part: ITM ENGINE COMPONENTS 0216065.
Buying Engine Parts for a 1978 Triumph TR7
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- 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 seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Filter and Crankshaft Repair Sleeve .
Frequently Asked Questions
How many engine parts fit the 1978 Triumph TR7?
Our catalog currently lists 20 engine parts for the 1978 Triumph TR7 across 11 subcategories and 12 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of engine problems on a 1978 Triumph TR7?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. 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 seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
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 1978 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 1978 Triumph TR7?
Every part on this page is matched to the 2.0L L4 engine. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1978 Triumph TR7
Engine Parts for Other Triumph TR7 Years
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