5 Engine parts are listed for the 1975 MG MGB, in 5 part types, covering both the 1.8L L4 and the 3.5L V8. Each one has a brand, a manufacturer part number and notes that say where it fits.
The engine on the 1975 MG MGB 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 Camshaft (1 part), Camshaft Bearing (1 part) and Connecting Rod Bearing (1 part). The other 2 part types cover the remaining 2 parts.
The 1975 MG MGB was sold with both the 1.8L L4 and the 3.5L V8. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
3 brands supply engine parts for the 1975 MG MGB, led by AJUSA (2 parts), KING ENGINE BEARINGS (2 parts) and DURA-BOND (1 part).
Each part number listed for the 1975 MG MGB opens a page with every vehicle that part fits.
Camshaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA Fits: 3.5L V8 | 93099200 | 🇺🇸 US | Engine # 15G | View on Amazon |
This table covers the camshafts that open the valves.
One part is listed for the 1975 MG MGB — AJUSA 93099200.
Camshaft Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND Fits: 3.5L V8 | DA2 | 🇺🇸 US | Standard | View on Amazon |
This table covers the Camshaft bearings. 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 1975 MG MGB — DURA-BOND DA2.
Connecting Rod Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS Fits: 3.5L V8 | CR811SI | 🇺🇸 US | BI-Metal (aluminum silicon base)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 1975 MG MGB — KING ENGINE BEARINGS CR811SI.
Conversion / Lower Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA Fits: 3.5L V8 | 54043200 | 🇺🇸 US | 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 1975 MG MGB — AJUSA 54043200.
Crankshaft Main Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS Fits: 3.5L V8 | MB589AM | 🇺🇸 US | BI-Metal (aluminum base)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: KING ENGINE BEARINGS MB589AM.
Buying Engine Parts for a 1975 MG MGB
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.
- Match the engine first. Every engine part here is engine-specific; each row shows which engine(s) it fits.
- 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: Camshaft and Camshaft Bearing .
Frequently Asked Questions
How many engine parts fit the 1975 MG MGB?
Our catalog currently lists 5 engine parts for the 1975 MG MGB across 5 subcategories and 3 brands, covering both the 1.8L L4 and the 3.5L V8. Each part is matched to the engine(s) it fits.
Do engine parts differ between 1975 MG MGB engines?
Yes. Every engine part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of engine problems on a 1975 MG MGB?
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 1975 MG MGB 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 1975 MG MGB?
First match the engine — each row shows which engine(s) the part fits. 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 1975 MG MGB
Engine Parts for Other MG MGB Years
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