1981 Checker Marathon Engine Parts

This table covers the Bolt kits. Read more

ARP supplies the 4 Bolt Kit parts for the 1981 Checker Marathon.

Part numbers include ARP 5349701, ARP 5349801 and ARP 5349601, among others listed above.

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

14 Camshaft Bearing parts are listed for the 1981 Checker Marathon, from DURA-BOND, SEALED POWER, MAHLE / CLEVITE and 1 other brand. DURA-BOND CH17 carries the "Popular" badge.

This table covers the Camshaft bolts. Read more

This group shows a single part: ARP 1341001.

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

45 Connecting Rod Bearing parts are listed for the 1981 Checker Marathon, from MAHLE / CLEVITE, KING ENGINE BEARINGS, ENGINE PRO and 1 other brand. MAHLE / CLEVITE CB1227H carries the "Popular" badge. Grades run from High Performance through Standard Replacement; High Performance is the most populated section, led by MAHLE / CLEVITE, KING ENGINE BEARINGS and ENGINE PRO.

This table covers the Connecting Rod bolts. Read more

2 Connecting Rod Bolt parts for the 1981 Checker Marathon come from ARP.

Part numbers include ARP 1346003 and ARP 1346001.

This table covers the Connecting Rod nuts. Read more

This group shows a single part: DORMAN 635002.

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

7 Conversion / Lower Gasket Set parts are listed for the 1981 Checker Marathon, from MAHLE / CLEVITE, VICTOR REINZ, APEX and 2 other brands. APEX ACS3022 carries the "Popular" badge.

This group includes APEX ACS3022, ENGINE PRO 3777332 and FEL-PRO CS77332 and the remaining parts 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

26 Crankshaft Main Bearing parts for the 1981 Checker Marathon come from 4 brands — KING ENGINE BEARINGS, MAHLE / CLEVITE, SEALED POWER and 1 other brand. The "Popular" part is MAHLE / CLEVITE MS909H. They are grouped as High Performance and Standard Replacement, with High Performance the largest group at 9 parts from KING ENGINE BEARINGS and MAHLE / CLEVITE.

This table covers the Crankshaft Main Bearing Cap bolts. Read more

ARP supplies both parts for the 1981 Checker Marathon.

This group includes ARP 1345401 and ARP 1345601.

This table covers the sleeves used to restore a grooved crankshaft seal surface. Read more

3 Crankshaft Repair Sleeve parts for the 1981 Checker Marathon come from 3 brands — NATIONAL, TIMKEN and WJB / INMOTION PARTS.

Part numbers include NATIONAL 99176, TIMKEN KWK99176 and WJB / INMOTION PARTS WS99176.

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

15 Crankshaft Seal parts for the 1981 Checker Marathon come from 9 brands — FEL-PRO, NATIONAL, MAHLE / CLEVITE and 6 other brands. The "Popular" part is FEL-PRO BS40013.

This table covers the bolts that clamp the cylinder head to the block. Read more

10 Cylinder Head Bolt parts are listed for the 1981 Checker Marathon, from ARP, MAHLE / CLEVITE, FEL-PRO and 2 other brands. ARP 1343601 carries the "Popular" badge.

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

12 Cylinder Head Gasket parts are listed for the 1981 Checker Marathon, from FEL-PRO, MAHLE / CLEVITE, VICTOR REINZ and 2 other brands. APEX AHG324 carries the "Popular" badge.

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

10 Cylinder Head Gasket Set parts are listed for the 1981 Checker Marathon, from FEL-PRO, VICTOR REINZ, MAHLE / CLEVITE and 1 other brand. FEL-PRO HS8510PT1 carries the "Popular" badge.

This table covers the Cylinder Head 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

2 Cylinder Head Plug parts for the 1981 Checker Marathon come from DORMAN.

Part numbers include DORMAN 116201 and DORMAN 116203.

This table covers the block heaters that warm the coolant or oil in cold weather. Read more

This group shows a single part: KAT'S HEATERS 11610.

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

8 Engine Kit Gasket Set parts are listed for the 1981 Checker Marathon, from MAHLE / CLEVITE, ENGINE PRO, APEX and 2 other brands. APEX AFS3024 carries the "Popular" badge.

This group includes APEX AFS3024, FEL-PRO FS8510PT1 and ENGINE PRO 311000 and the remaining parts above.

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

2 Exhaust Valve parts for the 1981 Checker Marathon come from MAHLE / CLEVITE.

Part numbers include MAHLE / CLEVITE 2112486 and MAHLE / CLEVITE 2111679.

This table covers the Harmonic Balancer bolts. Read more

3 Harmonic Balancer Bolt parts for the 1981 Checker Marathon come from ARP.

This group includes ARP 4306801, ARP 1342501 and ARP 2342501.

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

6 Harmonic Balancer Repair Sleeve parts for the 1981 Checker Marathon come from 5 brands — NATIONAL, MAHLE / CLEVITE, BCA and 2 other brands. The "Popular" part is MAHLE / CLEVITE A228.

Listed part numbers: MAHLE / CLEVITE A228, NATIONAL 88176 and BCA NS5000, plus the other parts above.

This table covers the Intake Manifold bolts. Read more

ARP supplies the 4 Intake Manifold Bolt parts for the 1981 Checker Marathon.

Listed part numbers: ARP 1342001, ARP 1342101 and ARP 4342001, plus the other parts above.

This table covers the gaskets between the intake manifold and 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

11 Intake Manifold Gasket parts are listed for the 1981 Checker Marathon, from MAHLE / CLEVITE, VICTOR REINZ, FEL-PRO and 2 other brands. APEX AMS3221 carries the "Popular" badge.

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

This group shows a single part: MAHLE / CLEVITE 2112357.

This table covers the drain plugs in the oil pan. Read more

2 Oil Drain Plug parts for the 1981 Checker Marathon come from 2 brands — AGS and DORMAN.

Part numbers include AGS ODP00016 and DORMAN 090052.

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

6 Oil Drain Plug Gasket parts are listed for the 1981 Checker Marathon, from MAHLE / CLEVITE, VICTOR REINZ, DORMAN and 3 other brands. MAHLE / CLEVITE 2051 carries the "Popular" badge.

Part numbers include MAHLE / CLEVITE 2051, VICTOR REINZ 711346200 and DORMAN 097022, among others listed above.

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

24 Oil Filter parts for the 1981 Checker Marathon come from 10 brands — BOSCH, CHAMP / LUBER-FINER, FRAM and 7 other brands. The "Popular" part is ACDELCO UPF52R.

The Economy section lists 11 options from CHAMP / LUBER-FINER, PRO-TEC, PUROLATOR and 4 other brands — the catalog's value-priced group. BOSCH 72238WS is listed in this group.

The High Performance / Heavy Duty section lists 5 options from MOBIL, ACDELCO, FRAM and 1 other brand — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. ACDELCO UPF52R is listed in this group.

In the Standard Replacement grade, ACDELCO, WIX, BOSCH and 2 other brands supply 8 parts: built to original-equipment specification. A representative part number is ACDELCO PF52E.

This table covers the Oil Pan bolts. Read more

5 Oil Pan Bolt parts for the 1981 Checker Marathon come from ARP. The "Popular" part is ARP 2341802.

Listed part numbers: ARP 2341802, ARP 4341802 and ARP 2341901, plus the other parts above.

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

12 Oil Pan Gasket parts for the 1981 Checker Marathon come from 5 brands — MAHLE / CLEVITE, FEL-PRO, VICTOR REINZ and 2 other brands. The "Popular" part is FEL-PRO OS34510T.