2008 Cadillac STS Engine Parts

This table covers the seals at each camshaft end. 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

5 Camshaft Seal parts are listed for the 2008 Cadillac STS, from FEL-PRO, APEX, MAHLE / CLEVITE and 2 other brands. FEL-PRO TCS46011 carries the "Popular" badge.

This group includes FEL-PRO TCS46011, APEX ATC3680 and MAHLE / CLEVITE 67683 and the remaining parts 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

4 Connecting Rod Bearing parts for the 2008 Cadillac STS come from 4 brands — ENGINETECH, KING ENGINE BEARINGS, MAHLE / CLEVITE and 1 other brand.

This group includes ENGINETECH BB310J, KING ENGINE BEARINGS CR8003SI and MAHLE / CLEVITE CB1648P and the remaining parts above.

This table covers the Connecting Rod bolts. Read more

One part is listed for the 2008 Cadillac STS — GM GENUINE 12552947.

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

5 Conversion / Lower Gasket Set parts for the 2008 Cadillac STS come from 5 brands — ENGINETECH, AJUSA, APEX and 2 other brands. The "Popular" part is ENGINETECH GM281CSE.

Part numbers include ENGINETECH GM281CSE, AJUSA 54324700 and APEX ACS11045, 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

4 Crankshaft Main Bearing parts are listed for the 2008 Cadillac STS, from MAHLE / CLEVITE, ENGINETECH and SEALED POWER.

Listed part numbers: ENGINETECH BC414J, MAHLE / CLEVITE MS2206P and MAHLE / CLEVITE MS2206A, plus the other parts 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

10 Crankshaft Seal parts are listed for the 2008 Cadillac STS, from FEL-PRO, APEX, NATIONAL and 5 other brands. FEL-PRO BS40670 carries the "Popular" badge.

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

This group shows a single part: GM GENUINE 03522352.

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

5 Cylinder Head Bolt parts for the 2008 Cadillac STS come from 5 brands — FEL-PRO, APEX, ENGINETECH and 2 other brands. The "Popular" part is FEL-PRO ES72217.

Part numbers include FEL-PRO ES72217, APEX AHB370 and ENGINETECH HB279, among others listed above.

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 2008 Cadillac STS come from 3 brands — FEL-PRO, APEX and ULTRA-POWER. The "Popular" part is FEL-PRO 26381PT.

Listed part numbers: FEL-PRO 26381PT, FEL-PRO 26380PT and APEX AHG1145L, plus the other 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 2008 Cadillac STS come from 3 brands — ENGINETECH, FEL-PRO and APEX. The "Popular" part is ENGINETECH GM281HSG.

This group includes ENGINETECH GM281HSG, APEX AHS11045 and ENGINETECH GM281HSGWB and the remaining 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

One part is listed for the 2008 Cadillac STS — GM GENUINE 11562126.

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 2008 Cadillac STS, from GM GENUINE and KAT'S HEATERS.

Part numbers include GM GENUINE 12587380 and KAT'S HEATERS 11484.

This table covers the Engine covers. Read more

This group shows a single part: TECHPRO GM1228126.

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

This group shows a single part: AJUSA 50555500.

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 2008 Cadillac STS, from QUALCAST and SBI.

This group includes QUALCAST 102054, QUALCAST 1013243 and SBI 13243.

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

2 Harmonic Balancer parts for the 2008 Cadillac STS come from 2 brands — DORMAN and ULTRA-POWER.

Part numbers include DORMAN 594709, among others listed above.

This table covers the Harmonic Balancer bolts. Read more

2 Harmonic Balancer Bolt parts are listed for the 2008 Cadillac STS, from DORMAN and GM GENUINE.

This group includes DORMAN 595005 and GM GENUINE 11549124.

This table covers the Intake insulators. Read more

This group shows a single part: GM GENUINE 12559120.

This table covers the Intake manifolds. Typical signs include an exhaust tick, a vacuum leak, or a gasket that has burned through. Replace the gaskets and hardware; a warped flange will leak with a new gasket alone. Read more

One part is listed for the 2008 Cadillac STS — GM GENUINE 19330172.

This table covers the Intake Manifold bolts. Read more

This group shows a single part: GM GENUINE 11588352.

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

5 Intake Manifold Gasket parts for the 2008 Cadillac STS come from 5 brands — FEL-PRO, APEX, GM GENUINE and 2 other brands. The "Popular" part is FEL-PRO MS96716.

Listed part numbers: FEL-PRO MS96716, APEX AMS3692 and GM GENUINE 12588809, 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

4 Intake Valve parts are listed for the 2008 Cadillac STS, from ENGINETECH, QUALCAST, SBI and 1 other brand.

Listed part numbers: ENGINETECH V4362, QUALCAST 102053 and SBI 02053, plus the other parts above.

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

8 Motor Mount parts are listed for the 2008 Cadillac STS, from DEA / MARMON RIDE CONTROL, PIONEER, SKP and 2 other brands. SKP SKM3149 carries the "Popular" badge.

In the Economy grade, SKP supplies 1 part: the catalog's value-priced group. A representative part number is SKP SKM3149.

The Standard Replacement section lists 7 options from DEA / MARMON RIDE CONTROL, PIONEER, ANCHOR and 1 other brand — built to original-equipment specification. ANCHOR 3149 is listed in this group.

Part numbers include SKP SKM3149, ANCHOR 3149 and DEA / MARMON RIDE CONTROL A5722, among others listed above.

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

26 Oil parts are listed for the 2008 Cadillac STS, from VALVOLINE, MOBIL, LIQUI MOLY and 3 other brands. LIQUI MOLY 20228 carries the "Popular" badge. They are grouped as Full Synthetic, High Mileage (>75,000 Miles) and Synthetic Blend, with Full Synthetic the largest group at 18 parts from LIQUI MOLY, VALVOLINE, MOBIL and 3 other brands.

This table covers the Oil Cooler 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

One part is listed for the 2008 Cadillac STS — GM GENUINE 25013759.

This table covers the gaskets that seal the Oil Cooler. 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: DORMAN 66219.

This table covers the Oil Cooler Mounting kits. Read more

2 Oil Cooler Mounting Kit parts for the 2008 Cadillac STS come from HAYDEN.

This group includes 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

3 Oil Dipstick / Tube Seal parts for the 2008 Cadillac STS come from 3 brands — ELRING, FEL-PRO and GM GENUINE.

Listed part numbers: ELRING 584210, FEL-PRO 73889 and GM GENUINE 24504031.

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

6 Oil Drain Plug parts are listed for the 2008 Cadillac STS, from DORMAN, ELRING, GM GENUINE and 1 other brand. DORMAN 090175 carries the "Popular" badge.

Economy: 1 part, from DORMAN. A representative part number is DORMAN 090175.

The Twist Drain section lists 1 option from DORMAN — grouped under the catalog's "Twist Drain" designation — the notes column spells out what sets them apart. DORMAN 092018 is listed in this group.

4 ungrouped parts are not assigned to a grade, with the same engine-level match.

Part numbers include DORMAN 090175, DORMAN 092018 and DORMAN 090034, among others listed 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

4 Oil Drain Plug Gasket parts for the 2008 Cadillac STS come from 3 brands — DORMAN, ELRING and ULTRA-POWER.

Part numbers include DORMAN 097119, DORMAN 97119 and ELRING 056130, among others listed above.

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

4 Oil Filler Cap parts are listed for the 2008 Cadillac STS, from ACDELCO, GATES, MOTORAD and 1 other brand.

Listed part numbers: ACDELCO FC215, GATES 31103 and MOTORAD MO99, plus the other parts above.

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 2008 Cadillac STS 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

19 Oil Filter parts are listed for the 2008 Cadillac STS, from FRAM, VARIOUS MFR, ACDELCO and 10 other brands. CHAMP / LUBER-FINER PH59 carries the "Popular" badge.

Economy: 6 parts, from CHAMP / LUBER-FINER, FRAM, FVP and 3 other brands. A representative part number is CHAMP / LUBER-FINER PH59.

In the High Performance / Heavy Duty grade, FRAM, ACDELCO, MOBIL and 1 other brand supply 5 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 UPF61R.

The Standard Replacement section: 8 options from ACDELCO, BOSCH, WIX and 5 other brands. ACDELCO PF61E is listed in this group.

This table covers the Oil Filter adapters. Read more

This group shows a single part: GM GENUINE 24575062.

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

4 Oil Filter Adapter Gasket / O-Ring parts for the 2008 Cadillac STS come from 4 brands — FEL-PRO, GM GENUINE, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: FEL-PRO 71288, GM GENUINE 12573045 and MAHLE / CLEVITE B32435, plus the other parts above.

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

One part is listed for the 2008 Cadillac STS — GM GENUINE 25014612.

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 2008 Cadillac STS, from AJUSA, APEX, FEL-PRO and 1 other brand.

Listed part numbers: AJUSA 14119500, APEX AOP1145 and FEL-PRO OS30796R, plus the other parts above.

This table covers the Oil Pan Gasket rivets. Read more

One part is listed for the 2008 Cadillac STS — GM GENUINE 12558759.

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

2 Oil Pump parts are listed for the 2008 Cadillac STS, from ENGINETECH and MELLING.

Economy: 1 part, from ENGINETECH. A representative part number is ENGINETECH EPK116.

The Standard Replacement section: 1 option from MELLING. MELLING M488 is listed in this group.

Listed part numbers: ENGINETECH EPK116 and MELLING M488.

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

4 Piston parts for the 2008 Cadillac STS come from 2 brands — SILV-O-LITE and ENGINETECH.

In the Premium grade, SILV-O-LITE supplies 1 part: a step above OE specification in materials, tolerances or warranty terms. A representative part number is SILV-O-LITE 3532HC.

Standard Replacement: 2 parts, from ENGINETECH. A representative part number is ENGINETECH P5078.

1 further part sits outside the graded sections, with the same engine-level match.

Part numbers include SILV-O-LITE 3532HC, ENGINETECH P5078 and ENGINETECH K50788P, among others listed above.

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

2 Piston Ring parts for the 2008 Cadillac STS come from 2 brands — ENGINETECH and MAHLE / CLEVITE.

This group includes ENGINETECH S93158 and MAHLE / CLEVITE 41930CP.

This table covers the rocker arms that transfer cam motion to the valves. Read more

3 Rocker Arm parts are listed for the 2008 Cadillac STS, from GM GENUINE, MELLING and QUALCAST.

Listed part numbers: GM GENUINE 12693909, MELLING MR1340 and QUALCAST 402917.

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

10 Timing Chain parts for the 2008 Cadillac STS come from 5 brands — MELLING, CLOYES, INA and 2 other brands. The "Popular" part is MELLING 8MMSRH62.

This table covers kits that group a timing chain with the related tensioners and guides. Read more

5 Timing Chain & Component Kit parts are listed for the 2008 Cadillac STS, from PREFERRED COMPONENTS INC, S.A. GEAR, SKP and 2 other brands. CLOYES 94186SX carries the "Popular" badge.

Economy: 3 parts, from PREFERRED COMPONENTS INC, S.A. GEAR and SKP. A representative part number is PREFERRED COMPONENTS INC TS21562.

The Standard Replacement section: 2 options from CLOYES and INA. CLOYES 94186SX is listed in this group.

Listed part numbers: CLOYES 94186SX, PREFERRED COMPONENTS INC TS21562 and S.A. GEAR 76318S, plus the other parts above.

This table covers the guides and dampers that keep the timing chain on its path. Read more

16 Timing Chain Guide / Damper parts for the 2008 Cadillac STS come from 5 brands — S.A. GEAR, CLOYES, MELLING and 2 other brands. The "Popular" part is MELLING BG310.

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

14 Timing Chain Tensioner parts are listed for the 2008 Cadillac STS, from INA, PREFERRED COMPONENTS INC, S.A. GEAR and 3 other brands. GM GENUINE 12581223 carries the "Popular" badge.

This table covers the gaskets that seal the Timing Cover. 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

One part is listed for the 2008 Cadillac STS — MAHLE / CLEVITE JV5152.

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

2 Timing Cover Seal parts are listed for the 2008 Cadillac STS, from SKF and WJB / INMOTION PARTS.

Listed part numbers: SKF 20557A and WJB / INMOTION PARTS WS20557A.

This table covers the Timing Idler sprockets. Read more

3 Timing Idler Sprocket parts for the 2008 Cadillac STS come from 3 brands — FVP, GM GENUINE and PREFERRED COMPONENTS INC.

Part numbers include FVP S772T, GM GENUINE 12577433 and PREFERRED COMPONENTS INC G55772.

This table covers the Valve Cover Bolt screws. Typical signs include a rounded head, a seeping bleeder, or a fastener that will not hold torque. Do not force a new screw into a stripped hole — repair the thread first. Read more

This group shows a single part: GM GENUINE 12557829.

This table covers the seals at the Valve Cover Bolt. 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: GM GENUINE 12573742.

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

5 Valve Cover Gasket parts are listed for the 2008 Cadillac STS, from FEL-PRO, APEX, GM GENUINE and 2 other brands. FEL-PRO VS50728R carries the "Popular" badge.

Listed part numbers: FEL-PRO VS50728R, APEX AVC1145S and GM GENUINE 12576396, plus the other parts 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

4 Valve Guide parts are listed for the 2008 Cadillac STS, from ENGINETECH and SBI.

Listed part numbers: ENGINETECH GD3056, ENGINETECH GD3057 and SBI 1403056, plus the other parts above.