1991 Buick Regal Engine Parts

This table covers the Balance Shaft sprockets. Read more

4 Balance Shaft Sprocket parts for the 1991 Buick Regal come from 4 brands — CLOYES, FVP, INA and 1 other brand.

Part numbers include CLOYES 2551 and INA ZS2551, among others listed above.

This table covers the camshafts that open the valves. Read more

This group shows a single part: ENGINETECH ES1514.

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

6 Camshaft Bearing parts for the 1991 Buick Regal come from 2 brands — DURA-BOND and ENGINETECH. The "Popular" part is DURA-BOND B13.

This group includes DURA-BOND B13, DURA-BOND B13R and DURA-BOND BP13 and the remaining parts above.

This table covers the Camshaft 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

This group shows a single part: DORMAN 570012.

This table covers the Camshaft Thrust buttons. Read more

4 Camshaft Thrust Button parts for the 1991 Buick Regal come from PIONEER.

Part numbers include PIONEER 500007, PIONEER 500006 and PIONEER 839008, among others listed above.

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

11 Connecting Rod Bearing parts for the 1991 Buick Regal come from 5 brands — MAHLE / CLEVITE, KING ENGINE BEARINGS, SEALED POWER and 2 other brands. The "Popular" part is ENGINETECH BB624J.

The High Performance section lists 2 options from KING ENGINE BEARINGS — engineered beyond original-equipment specification. KING ENGINE BEARINGS CR6664XP is listed in this group.

In the Standard Replacement grade, MAHLE / CLEVITE, SEALED POWER, ENGINETECH and 2 other brands supply 9 parts: built to original-equipment specification. A representative part number is ENGINETECH BB624J.

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 1991 Buick Regal come from 4 brands — APEX, ELRING, FEL-PRO and 1 other brand.

Part numbers include APEX ACS3055, ELRING 696820 and FEL-PRO CS9644, among others listed above.

This table covers the crankshafts that turn piston motion into rotation. Read more

This group shows a single part: ENGINETECH 103500.

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

5 Crankshaft Main Bearing parts are listed for the 1991 Buick Regal, from SEALED POWER, ENGINETECH, GM GENUINE and 1 other brand. SEALED POWER 7144MA carries the "Popular" badge.

High Performance: 1 part, from SEALED POWER. A representative part number is SEALED POWER 107M.

The Standard Replacement section: 4 options from SEALED POWER, ENGINETECH, GM GENUINE and 1 other brand. SEALED POWER 7144MA is listed in this group.

This group includes SEALED POWER 7144MA, SEALED POWER 107M and ENGINETECH BC450J and the remaining parts above.

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

This group shows a single part: GM GENUINE 24503056.

This table covers the wear sleeves used to restore a Crankshaft Main Bearing seal surface. Read more

This group shows a single part: VICTOR REINZ 711348200.

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

7 Crankshaft Repair Sleeve parts are listed for the 1991 Buick Regal, from TIMKEN, WJB / INMOTION PARTS, FEL-PRO and 2 other brands. TIMKEN KWK99193 carries the "Popular" badge.

Part numbers include TIMKEN KWK99193, WJB / INMOTION PARTS WS99193 and FEL-PRO 16276, among others listed above.

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

20 Crankshaft Seal parts are listed for the 1991 Buick Regal, from TIMKEN, WJB / INMOTION PARTS, FEL-PRO and 9 other brands. FEL-PRO BS40649 carries the "Popular" badge.

This table covers the Cylinder Head Alignment Dowel pins. Read more

3 Cylinder Head Alignment Dowel Pin parts for the 1991 Buick Regal come from PIONEER.

Listed part numbers: PIONEER S1110, PIONEER PG225 and PIONEER PG651.

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

6 Cylinder Head Bolt parts for the 1991 Buick Regal come from 4 brands — PIONEER, APEX, GM GENUINE and 1 other brand. The "Popular" part is APEX AHB353.

This group includes APEX AHB353, GM GENUINE 88891770 and MAHLE / CLEVITE GS33233 and the remaining parts above.

This table covers the Cylinder Head Bolt washers. Read more

This group shows a single part: PIONEER S1018.

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

6 Cylinder Head Gasket parts for the 1991 Buick Regal come from 5 brands — ELRING, CORTECO, FEL-PRO and 2 other brands. The "Popular" part is CORTECO 20686GR.

Part numbers include CORTECO 20686GR, FEL-PRO 9644PT and APEX AHG353, among others listed 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

6 Cylinder Head Gasket Set parts for the 1991 Buick Regal come from 5 brands — ENGINETECH, APEX, FEL-PRO and 2 other brands. The "Popular" part is APEX AHS3056.

Listed part numbers: APEX AHS3056, FEL-PRO HS9644PT1 and ENGINETECH B38HSG, plus the other parts above.

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

DORMAN supplies the 3 Cylinder Head Plug parts for the 1991 Buick Regal.

Listed part numbers: DORMAN 565019, DORMAN 570006 and DORMAN 116203.

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

4 Cylinder Repair Sleeve parts for the 1991 Buick Regal come from 2 brands — MELLING and ENGINETECH.

Listed part numbers: ENGINETECH ESL1101, MELLING CSL138 and MELLING CSL138X, plus the other parts above.

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

2 Engine Block Heater parts are listed for the 1991 Buick Regal, from KAT'S HEATERS and TEMRO.

Part numbers include KAT'S HEATERS 11416 and TEMRO 3100041.

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

3 Engine Kit Gasket Set parts for the 1991 Buick Regal come from 2 brands — ENGINETECH and MAHLE / CLEVITE.

Listed part numbers: ENGINETECH B38B81, ENGINETECH B38C81 and MAHLE / CLEVITE 953164.

This table covers the Engine rebuild kits. Read more

3 Engine Rebuild Kit parts for the 1991 Buick Regal come from ENGINETECH.

This group includes ENGINETECH MKB3800AP, ENGINETECH RCB3800AP and ENGINETECH RCB3800BP.

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

3 Exhaust Valve parts are listed for the 1991 Buick Regal, from ENGINETECH, QUALCAST and SBI.

Part numbers include ENGINETECH V2317, QUALCAST 101710 and SBI 01710.

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

13 Expansion Plug parts for the 1991 Buick Regal come from 4 brands — DORMAN, PIONEER, ENGINETECH and 1 other brand. The "Popular" part is DORMAN 555077.

This table covers the crankshaft pulleys / harmonic balancers at the front of the engine. Read more

6 Harmonic Balancer parts for the 1991 Buick Regal come from 3 brands — DAYCO, ATP and PIONEER. The "Popular" part is ATP 102072.

The High Performance section: 1 option from DAYCO. DAYCO PBO81083SS5 is listed in this group.

Standard Replacement: 5 parts, from ATP, PIONEER and DAYCO. A representative part number is ATP 102072.

Listed part numbers: ATP 102072, DAYCO PBO81083SS5 and DAYCO PB1083N, plus the other parts above.

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

One part is listed for the 1991 Buick Regal — PIONEER HB4121.

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

4 Intake Manifold Gasket parts for the 1991 Buick Regal come from 4 brands — APEX, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: APEX AMS3561, FEL-PRO MS949181 and MAHLE / CLEVITE MS16202, plus the other 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

3 Intake Valve parts are listed for the 1991 Buick Regal, from ENGINETECH, QUALCAST and SBI.

Listed part numbers: ENGINETECH V2274, QUALCAST 101711 and SBI 01711.

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

16 Motor Mount parts are listed for the 1991 Buick Regal, from ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 5 other brands. CORTECO MT2697 carries the "Popular" badge.

In the Economy grade, CORTECO, ANCHOR, AUTO EXTRA and 2 other brands supply 5 parts: the catalog's value-priced group. A representative part number is CORTECO MT2697.

The Standard Replacement section: 11 options from DEA / MARMON RIDE CONTROL, PIONEER, WESTAR and 1 other brand. ANCHOR 2697 is listed in this group.

This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable. Read more

19 Oil parts are listed for the 1991 Buick Regal, from MOBIL and VALVOLINE. MOBIL 125195 carries the "Popular" badge.

In the Conventional grade, VALVOLINE supplies 2 parts: grouped under the catalog's "Conventional" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE 797578.

In the Full Synthetic grade, MOBIL and VALVOLINE supply 7 parts: full-synthetic oils. A representative part number is MOBIL 125195.

The High Mileage (>75,000 Miles) section lists 8 options from MOBIL and VALVOLINE — oils grouped for high-mileage engines. MOBIL 125201 is listed in this group.

In the Synthetic Blend grade, MOBIL supplies 2 parts: synthetic-blend oils. A representative part number is MOBIL 124406.

This table covers the Oil Cooler lines. Typical signs include a wet fitting, a rusted pipe, or a pressure loss in this circuit. Flare or thread the new line the way the notes specify; a kinked replacement will fail early. Read more

One part is listed for the 1991 Buick Regal — GM GENUINE 11570383.

This table covers the Oil Cooler Mounting kits. Read more

2 Oil Cooler Mounting Kit parts for the 1991 Buick Regal come from HAYDEN.

Listed part numbers: HAYDEN 238 and HAYDEN 153.

This table covers the seals at the Oil Dipstick / Tube. 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

This group shows a single part: ELRING 584210.

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

9 Oil Drain Plug parts are listed for the 1991 Buick Regal, from DORMAN, AGS, ELRING and 1 other brand. AGS ODP00016 carries the "Popular" badge.

Listed part numbers: AGS ODP00016, DORMAN 090052 and DORMAN 090031, plus the other parts above.

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

10 Oil Drain Plug Gasket parts for the 1991 Buick Regal come from 8 brands — DORMAN, ULTRA-POWER, MAHLE / CLEVITE and 5 other brands. The "Popular" part is MAHLE / CLEVITE 2051.

This table covers the caps on the oil filler neck. Read more

3 Oil Filler Cap parts are listed for the 1991 Buick Regal, from GATES, MOTORAD and SKP.

Listed part numbers: GATES 31103, MOTORAD MO99 and SKP SKMO99.

This table covers the gaskets that seal the Oil Filler Cap. 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 Filler Cap Gasket parts for the 1991 Buick Regal come from 3 brands — ELRING, FEL-PRO and GM GENUINE.

Part numbers include ELRING 592250, ELRING 823620 and FEL-PRO 73193, 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

20 Oil Filter parts are listed for the 1991 Buick Regal, from BOSCH, CHAMP / LUBER-FINER, FRAM and 10 other brands. BOSCH 72132WS carries the "Popular" badge.

Economy: 6 parts, from BOSCH, CHAMP / LUBER-FINER, FRAM and 3 other brands. A representative part number is BOSCH 72132WS.

In the High Performance / Heavy Duty grade, ACDELCO, FRAM, MOBIL and 1 other brand supply 4 parts: grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO UPF47R.

The Standard Replacement section: 10 options from HENGST, ACDELCO, WIX and 6 other brands. ACDELCO PF47E is listed in this group.

This table covers the Oil Filter Adapter Gasket O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

2 Oil Filter Adapter Gasket / O-Ring parts for the 1991 Buick Regal come from 2 brands — GM GENUINE and MAHLE / CLEVITE.

This group includes GM GENUINE 25534742 and MAHLE / CLEVITE B31639.

This table covers the Oil Filter Bypass valves. 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 Oil Filter Bypass Valve parts are listed for the 1991 Buick Regal, from DORMAN and GM GENUINE.

This group includes DORMAN 927841 and GM GENUINE 19542299.

This table covers the gaskets that seal the Oil Filter. 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

3 Oil Filter Gasket parts for the 1991 Buick Regal come from 3 brands — APEX, FEL-PRO and VICTOR REINZ.

Part numbers include APEX AOM6003, FEL-PRO 70644 and VICTOR REINZ 711350600.

This table covers the oil pans that hold the engine's oil sump. Read more

5 Oil Pan parts for the 1991 Buick Regal come from 4 brands — SPECTRA PREMIUM, ATP, SKP and 1 other brand. The "Popular" part is SPECTRA PREMIUM GMP24A.

Listed part numbers: SPECTRA PREMIUM GMP24A, ATP 103107 and SKP SK264160, plus the other parts above.

This table covers the Oil Pan bolts. Read more

One part is listed for the 1991 Buick Regal — PIONEER 854006.