Search all categories, alternate names, common job terms and known part numbers.
VALVETRAIN & COVERS
Rockers, lifters and covers
Rocker arm bolts
Base circleTorque each rocker only after confirming its lifter is on the camshaft base circle.
Base-circle method →Valve cover bolts
In sequenceTighten in the specified rocker-cover sequence.
Valley cover bolts
OEM hardwareVerify aftermarket AFM-delete cover instructions when a replacement cover is used.
Valve lifter guide bolts
4 fastenersConfirm each guide is fully seated over its lifters before tightening.
Valve lifter oil manifold bolts
OEM hardwareFactory oil-manifold hardware only.
Valve lifter oil manifold filter plug
OEM hardwareFactory filter-plug specification.
CAMSHAFT & TIMING
Camshaft and timing hardware
Camshaft retainer plate bolts
TORX-head boltsSeat the retainer plate evenly; verify any threadlocker requirement for the fastener being used.
Camshaft actuator / phaser bolt - Gen V
TTY · Replace2014-2018 L83/L86 and early LT1/LT4. Do not reuse or substitute the later Gen V+ bolt.
Camshaft actuator / phaser bolt - Gen V+
Different boltLater L82/L84/L87/L8T/LT2 applications use a different bolt. It is shown only to prevent a parts-counter mix-up.
Camshaft actuator magnet bolts
OEM hardwareThe small fasteners retaining the actuator magnet to the front cover.
Timing chain tensioner bolts
OEM hardwareConfirm the tensioner is seated and released correctly before rotating the engine.
Camshaft position sensor bolt
OEM hardwareCamshaft position sensor retaining bolt.
Camshaft sensor harness bolt
OEM hardwareHarness retaining bolt, not the sensor itself.
HEADS & ROTATING ASSEMBLY
Cylinder heads and bottom end
Cylinder head bolts - standard bolts
TTY · Replace19 required per engine. Tighten in sequence; the forward internal-hex bolt on the left head has a different final angle.
Cylinder head bolt - forward LH internal hex
TTY · ReplaceOne required per engine: forwardmost fastener on the driver-side cylinder head.
ARP head studs
Aftermarket hardwareDo not use the OEM head-bolt procedure. Torque depends on the exact ARP kit, lubricant and instructions supplied with it.
Connecting rod bolts
TTY · ReplaceFactory connecting-rod fasteners only.
Main cap inner bolts
TTY · In sequenceComplete the inner and outer fasteners in sequence before the side bolts.
Main cap outer bolts
TTY · In sequenceComplete in the specified main-cap sequence.
Main cap side bolts
TTY · Last passTighten only after the inner and outer main-cap fasteners are complete.
Crankshaft oil deflector bolts
OEM hardwareFactory windage/oil-deflector hardware.
COVERS & OIL SYSTEM
Front cover, rear housing and oil pan
Oil pump-to-block bolts
Alignment requiredCenter the pump with the correct alignment method before final torque.
Front cover bolts
OEM hardwarePosition the cover correctly before final torque.
Rear oil-seal housing bolts
OEM hardwareCrankshaft rear oil-seal housing to block.
Oil pan-to-block and front-cover bolts
Inside-out sequenceTighten the main upper-pan fasteners working from the inside outward.
The Fel-Pro service kit includes the cooler-line gasket, oil-pump pickup seal and related service seals. GM's factory-style procedure uses gray RTV instead of a formed pan gasket.
Oil pan-to-rear-housing bolts
OEM hardwareRear cross bolts; do not confuse inch-pounds with foot-pounds.
Lower-to-upper oil pan bolts
OEM hardwareLower pan perimeter fasteners.
Oil pan cover bolts
OEM hardwareFactory oil-pan service cover fasteners.
WHY THIS REFERENCE
More than a copied torque table.
- Exact applicationL83/L86 values stay separate from later Gen V+ hardware.
- Fastener intelligenceTTY status, reuse warnings and confirmed GM part numbers.
- Job contextBase circle, fuel-pump lash, timing and sequence links where the number alone is not enough.
- Traceable sourcesPrimary references stay centralized in the reference register instead of cluttering every torque card.
THE WHOLE REFERENCE STAYS FREE
Use it in the garage. Share it.
- Torque specifications and tightening sequences
- Pushrod length and preload calculator
- Timing, fuel-pump and base-circle procedures
- Tools and exact replacement-fastener references
Primary application baseline: L83/L86 fastener specification. Cross-checked against Summit Racing, Michigan Motorsports, ICT Billet and application-specific installation material. Conflicts stay unpublished until resolved.