1978 MG MGB Engine Parts

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. Read more

2 Camshaft Bearing parts for the 1978 MG MGB come from 2 brands — DURA-BOND and ITM ENGINE COMPONENTS.

Listed part numbers: DURA-BOND DA2 and ITM ENGINE COMPONENTS 3C4306.

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. Read more

3 Connecting Rod Bearing parts for the 1978 MG MGB come from 3 brands — ITM ENGINE COMPONENTS, KING ENGINE BEARINGS and MAHLE / CLEVITE.

Listed part numbers: ITM ENGINE COMPONENTS 4B2250, KING ENGINE BEARINGS CR4403AM and MAHLE / CLEVITE CB792P.

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. Read more

4 Conversion / Lower Gasket Set parts for the 1978 MG MGB come from 4 brands — AJUSA, ITM ENGINE COMPONENTS, MAHLE / CLEVITE and 1 other brand.

Part numbers include AJUSA 54031800, ITM ENGINE COMPONENTS 0924000 and MAHLE / CLEVITE CS3614, among others listed above.

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. Read more

2 Crankshaft Main Bearing parts are listed for the 1978 MG MGB, from ITM ENGINE COMPONENTS and KING ENGINE BEARINGS.

Part numbers include ITM ENGINE COMPONENTS 5M2255 and KING ENGINE BEARINGS MB520AM.

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. Read more

3 Crankshaft Seal parts are listed for the 1978 MG MGB, from AJUSA and ITM ENGINE COMPONENTS.

This group includes AJUSA 15015900, AJUSA 15038800 and ITM ENGINE COMPONENTS 1504002.

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. Read more

5 Cylinder Head Gasket parts for the 1978 MG MGB come from 5 brands — FEL-PRO, AJUSA, ITM ENGINE COMPONENTS and 2 other brands. The "Popular" part is FEL-PRO 21183C.

This group includes FEL-PRO 21183C, AJUSA 10023200 and ITM ENGINE COMPONENTS 0944002 and the remaining parts above.

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. Read more

5 Cylinder Head Gasket Set parts for the 1978 MG MGB come from 4 brands — ITM ENGINE COMPONENTS, AJUSA, MAHLE / CLEVITE and 1 other brand. The "Popular" part is ITM ENGINE COMPONENTS 0915212.

Listed part numbers: ITM ENGINE COMPONENTS 0915212, AJUSA 52055600 and ITM ENGINE COMPONENTS 0915213, plus the other parts above.

This table covers the wear sleeves used to restore a Cylinder seal surface. Read more

2 Cylinder Repair Sleeve parts for the 1978 MG MGB come from MELLING.

Listed part numbers: MELLING CSL619 and MELLING CSL719.

This table covers full gasket kits covering the joints opened in an engine rebuild. 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. Read more

2 Engine Kit Gasket Set parts for the 1978 MG MGB come from 2 brands — AJUSA and ITM ENGINE COMPONENTS.

Part numbers include AJUSA 50062900 and ITM ENGINE COMPONENTS 0904004.

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. Read more

One part is listed for the 1978 MG MGB — ITM ENGINE COMPONENTS RX34352.

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. Read more

5 Expansion Plug parts for the 1978 MG MGB come from 2 brands — PIONEER and DORMAN. The "Popular" part is DORMAN 565030.

This group includes DORMAN 565030, DORMAN 555030 and PIONEER PE143 and the remaining parts above.

This table covers the Intake & Exhaust Manifold gasket sets. 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. Read more

4 Intake & Exhaust Manifold Gasket Set parts for the 1978 MG MGB come from 4 brands — AJUSA, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

This group includes AJUSA 13017700, FEL-PRO MS22506B and MAHLE / CLEVITE MS15234 and the remaining parts above.

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. Read more

One part is listed for the 1978 MG MGB — ITM ENGINE COMPONENTS RV34401.

This table covers the mounts that hold the engine to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

2 Motor Mount parts are listed for the 1978 MG MGB, from ÜRO PARTS and BECK/ARNLEY.

In the Economy grade, ÜRO PARTS supplies 1 part: the catalog's value-priced group. A representative part number is ÜRO PARTS BHH1621.

The Standard Replacement section lists 1 option from BECK/ARNLEY — built to original-equipment specification. BECK/ARNLEY 1040369 is listed in this group.

Part numbers include ÜRO PARTS BHH1621 and BECK/ARNLEY 1040369.

This table covers the crush washers and gaskets under the oil drain plug. 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. Read more

This group shows a single part: AJUSA 18000900.

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. Read more

10 Oil Filter parts are listed for the 1978 MG MGB, from BOSCH, PRO-TEC, VARIOUS MFR and 6 other brands. MOTORCRAFT FL300 carries the "Popular" badge.

Economy: 3 parts, from BOSCH, PRO-TEC and VARIOUS MFR. A representative part number is BOSCH 72143WS.

In the High Performance / Heavy Duty grade, MOBIL supplies 1 part: grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. A representative part number is MOBIL M1204A.

The Standard Replacement section: 6 options from MOTORCRAFT, WIX, ACDELCO and 3 other brands. MOTORCRAFT FL300 is listed in this group.

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. Read more

4 Oil Pan Gasket parts are listed for the 1978 MG MGB, from AJUSA, FEL-PRO, ITM ENGINE COMPONENTS and 1 other brand.

Listed part numbers: AJUSA 14041100, FEL-PRO OS20011 and ITM ENGINE COMPONENTS 0994007, plus the other parts above.

This table covers the Oil pumps. Typical signs include noise from the pump, no pressure, or fluid that never arrives at the outlet. Prime or fill the pump as the notes require. A dry start is a common way to kill a new unit. Read more

One part is listed for the 1978 MG MGB — ITM ENGINE COMPONENTS 057370.

This table covers the chains that drive the oil pump. Read more

This group shows a single part: ITM ENGINE COMPONENTS 1352.

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. Read more

2 Piston parts for the 1978 MG MGB come from ITM ENGINE COMPONENTS.

Listed part numbers: ITM ENGINE COMPONENTS RY2694 and ITM ENGINE COMPONENTS RY2551.

This table covers the rings that seal each piston to the cylinder wall. Read more

3 Piston Ring parts for the 1978 MG MGB come from 2 brands — ITM ENGINE COMPONENTS and HASTINGS MANUFACTURING.

This group includes HASTINGS MANUFACTURING 9526, ITM ENGINE COMPONENTS 0211432 and ITM ENGINE COMPONENTS 0213088.

This table covers the Thrust washers. Read more

2 Thrust Washer parts are listed for the 1978 MG MGB, from ITM ENGINE COMPONENTS and KING ENGINE BEARINGS.

Part numbers include ITM ENGINE COMPONENTS 2T2252 and KING ENGINE BEARINGS TW216AM.

This table covers the Timing Belt pulleys. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

BECK/ARNLEY supplies both parts for the 1978 MG MGB.

Listed part numbers: BECK/ARNLEY 0513860 and BECK/ARNLEY 0513954.

This table covers the timing chains that keep the cams in time with the crank. Read more

2 Timing Chain parts for the 1978 MG MGB come from 2 brands — INA and S.A. GEAR.

Listed part numbers: INA ZC94009 and S.A. GEAR 3SR52.

This table covers the tensioners that keep the timing chain taut. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

One part is listed for the 1978 MG MGB — ITM ENGINE COMPONENTS 60005.

This table covers the seals at the Timing Cover. 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. Read more

One part is listed for the 1978 MG MGB — ITM ENGINE COMPONENTS 1504001.

This table covers the gaskets that seal the valve cover 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. Read more

7 Valve Cover Gasket parts are listed for the 1978 MG MGB, from ITM ENGINE COMPONENTS, FEL-PRO, MAHLE / CLEVITE and 2 other brands. FEL-PRO VS215091 carries the "Popular" badge.

Part numbers include FEL-PRO VS215091, MAHLE / CLEVITE VS30026 and AJUSA 11016000, among others listed above.

This table covers the pressed-in bronze and cast-iron guides that align valve stems. Typical signs include oil smoke on startup, a guide that has gone oval, or a valve that no longer seats quietly. Guides are a machine-shop fit. Confirm stem diameter in the notes before ordering. Read more

ITM ENGINE COMPONENTS supplies the 4 Valve Guide parts for the 1978 MG MGB.

This group includes ITM ENGINE COMPONENTS VG752CI, ITM ENGINE COMPONENTS VG751BR and ITM ENGINE COMPONENTS VG752BR and the remaining parts above.

This table covers the lifters / tappets that transfer cam motion to the valves. Read more

One part is listed for the 1978 MG MGB — ITM ENGINE COMPONENTS 0565023.

This table covers the springs that close each intake and exhaust valve. Typical signs include a sagging corner, a broken coil, or a clunk from the spring pocket. Replace springs in axle pairs and inspect the seats. Read more

This group shows a single part: ITM ENGINE COMPONENTS VS1148.

This table covers the seals on each valve stem that control oil into the guides. 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. Read more

3 Valve Stem Seal parts are listed for the 1978 MG MGB, from AJUSA and ITM ENGINE COMPONENTS.

Listed part numbers: AJUSA 16001000, AJUSA 57001100 and ITM ENGINE COMPONENTS SS105.