The 1968 Triumph TR250 has 21 engine parts with verified fitment on this page — 9 part types and 7 brands, covering the 2.5L L6 engine. Each part includes a manufacturer part number and application notes.
On the 1968 Triumph TR250, 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. Most of the listed parts are Expansion Plug (6 parts), Crankshaft Seal (5 parts) and Crankshaft Repair Sleeve (3 parts). The other 6 part types cover the remaining 7 parts.
The 1968 Triumph TR250 came with a single engine, the 2.5L L6, and every part is verified against it.
7 brands supply engine parts for the 1968 Triumph TR250, led by ITM ENGINE COMPONENTS (8 parts), PIONEER (4 parts) and NATIONAL (2 parts), plus 4 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1968 Triumph TR250. 2 parts have it, including NATIONAL 472397 (Crankshaft Seal) and MELLING MPE156BR (Expansion Plug). Each part number opens a page with every vehicle that part fits.
Connecting Rod Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 6B2406 | 🇺🇸 US 🇨🇦 CA | Set | View on Amazon |
This table covers the bearings in the connecting-rod big ends. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
One part is listed for the 1968 Triumph TR250 — ITM ENGINE COMPONENTS 6B2406.
Conversion / Lower Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 0925601 | 🇺🇸 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.
One part is listed for the 1968 Triumph TR250 — ITM ENGINE COMPONENTS 0925601.
Crankshaft Main Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 4M2407 | 🇺🇸 US 🇨🇦 CA | Set | View on Amazon |
This table covers the main bearings that support the crankshaft in the block. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
This group shows a single part: ITM ENGINE COMPONENTS 4M2407.
Crankshaft Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL | 99199 | 🇺🇸 US 🇨🇦 CA | Front0.563 IN Width | View on Amazon |
| SCHAEFFLER | SR3511 | 🇺🇸 US 🇨🇦 CA | Frontwith 2.00 In Shaft | View on Amazon |
| WJB / INMOTION PARTS | WS99199 | 🇺🇸 US 🇨🇦 CA | Shaft Maximum Diameter (In): 2.0030000000000001 In | View on Amazon |
This table covers the sleeves used to restore a grooved crankshaft seal surface.
3 Crankshaft Repair Sleeve parts for the 1968 Triumph TR250 come from 3 brands — NATIONAL, SCHAEFFLER and WJB / INMOTION PARTS.
Part numbers include NATIONAL 99199, SCHAEFFLER SR3511 and WJB / INMOTION PARTS WS99199.
Crankshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 472397 | 🇺🇸 US 🇨🇦 CA | Nitrile | View on Amazon |
| BCA | NS472397 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| ITM ENGINE COMPONENTS | 1504013 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| SCHAEFFLER | SS3046 | 🇺🇸 US 🇨🇦 CA | Front3.01" O.D. X 0.31" Width | View on Amazon |
| WJB / INMOTION PARTS | WS472397 | 🇺🇸 US 🇨🇦 CA | Nitrile | 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.
5 Crankshaft Seal parts for the 1968 Triumph TR250 come from 5 brands — NATIONAL, BCA, ITM ENGINE COMPONENTS and 2 other brands. The "Popular" part is NATIONAL 472397.
This group includes NATIONAL 472397, BCA NS472397 and ITM ENGINE COMPONENTS 1504013 and the remaining parts above.
Cylinder Head Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 0945603 | 🇺🇸 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.
One part is listed for the 1968 Triumph TR250 — ITM ENGINE COMPONENTS 0945603.
Cylinder Head Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | 0915616 | 🇺🇸 US 🇨🇦 CA | Set does Not contain valve stem seals.Set | View on Amazon |
| ITM ENGINE COMPONENTS | 0915617 | 🇺🇸 US 🇨🇦 CA | Set does Not contain valve stem seals.Set | View on Amazon |
This table covers multi-piece gasket sets for a cylinder-head job. 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.
ITM ENGINE COMPONENTS supplies both parts for the 1968 Triumph TR250.
Listed part numbers: ITM ENGINE COMPONENTS 0915616 and ITM ENGINE COMPONENTS 0915617.
Exhaust Valve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ITM ENGINE COMPONENTS | RX34381 | 🇺🇸 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.
This group shows a single part: ITM ENGINE COMPONENTS RX34381.
Expansion Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING Popular | MPE156BR | 🇺🇸 US 🇨🇦 CA | Brass | View on Amazon |
| MELLING | MPE156R | 🇺🇸 US 🇨🇦 CA | Steel | View on Amazon |
| PIONEER | EP8 | 🇺🇸 US 🇨🇦 CA | Steel | View on Amazon |
| PIONEER | EPC208 | 🇺🇸 US 🇨🇦 CA | Steel | View on Amazon |
| PIONEER | EPC218 | 🇺🇸 US 🇨🇦 CA | Steel | View on Amazon |
| PIONEER | EPC256 | 🇺🇸 US 🇨🇦 CA | Steel | View on Amazon |
This table covers the Expansion 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.
6 Expansion Plug parts are listed for the 1968 Triumph TR250, from PIONEER and MELLING. MELLING MPE156BR carries the "Popular" badge.
This group includes MELLING MPE156BR, MELLING MPE156R and PIONEER EP8 and the remaining parts above.
Buying Engine Parts for a 1968 Triumph TR250
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 2.5L L6 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: Expansion Plug and Crankshaft Seal .
Frequently Asked Questions
How many engine parts fit the 1968 Triumph TR250?
Our catalog currently lists 21 engine parts for the 1968 Triumph TR250 across 9 subcategories and 7 brands, covering the 2.5L L6 engine. Each part is matched to the engine(s) it fits.
What are the signs of engine problems on a 1968 Triumph TR250?
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 1968 Triumph TR250 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 1968 Triumph TR250?
Every part on this page is matched to the 2.5L L6 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 1968 Triumph TR250
Engine Parts for Other Triumph TR250 Years
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