Chevy 350 Oil Pan Bolt Torque Specs by Location
Chevy 350 Oil Pan Bolt Torque Specs by Location with fastener-group distinctions, installation cautions, application limits and official source lookup.
For the Chevrolet Performance 350 HO Deluxe, tighten the oil-pan side-rail bolts to 97 in-lb (11 N·m) and the corner bolts to 15 lb-ft (20 N·m). The drain plug is also listed at 15 lb-ft (20 N·m).
For the Chevrolet Performance 350 HO Deluxe, tighten the oil-pan side-rail bolts to 97 in-lb (11 N·m) and the corner bolts to 15 lb-ft (20 N·m). The drain plug is also listed at 15 lb-ft (20 N·m).
These exact values apply to the oil pan and hardware arrangement supplied or specified for the cited 350 HO Deluxe package. Earlier two-piece seals, aftermarket cast pans, one-piece gasket kits and mixed-size production hardware may use different location groups.
Interactive 350 Small-Block V8 fastener map
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Orientation aid only. Match every position and stage to the exact service diagram.
Chevy 350 Oil Pan Bolt Torque Spec
| APPLICATION / ITEM | SPECIFICATION | NOTES |
|---|---|---|
| Side-rail bolts | 97 in-lb | 11 N·m; 350 HO Deluxe |
| Corner bolts | 15 lb-ft | 20 N·m; 350 HO Deluxe |
| Oil-pan drain plug | 15 lb-ft | 20 N·m; separate joint |
Separate the small side-rail bolts from the larger corner fasteners before starting. Flatten pulled bolt holes on a stamped pan, place sealant only where the gasket instructions call for it, start every bolt by hand, and tighten in gradual alternating passes. More torque will bow the flange and worsen a leak.
How to use this specification correctly
- 01
Identify the exact engine, component, fastener size and hardware instructions.
- 02
Clean and inspect threads and mating faces; apply only the specified lubricant or sealant.
- 03
Tighten in gradual balanced passes and verify any angle, cure-time or recheck instruction.
Application boundaries for 350 Small-Block V8
These exact values apply to the oil pan and hardware arrangement supplied or specified for the cited 350 HO Deluxe package. Earlier two-piece seals, aftermarket cast pans, one-piece gasket kits and mixed-size production hardware may use different location groups.
Separate the small side-rail bolts from the larger corner fasteners before starting. Flatten pulled bolt holes on a stamped pan, place sealant only where the gasket instructions call for it, start every bolt by hand, and tighten in gradual alternating passes. More torque will bow the flange and worsen a leak.
Chevrolet 350 Small-Block V8 specifications can change by model year, engine, platform, wheel, and installed component. Confirm the VIN or engine identity, part numbers, fastener condition, and the current manufacturer instructions before service.
Chevy 350 Oil Pan Bolt Torque Specs by Location FAQs
What is the Chevy 350 oil pan bolt torque?+
For the Chevrolet Performance 350 HO Deluxe: 97 in-lb (11 N·m) on the side-rail bolts and 15 lb-ft (20 N·m) on the corner bolts. The drain plug is also listed at 15 lb-ft (20 N·m).
Why are the corner bolts tightened so much harder than the rail bolts?+
They are different fasteners doing different jobs — the small side-rail bolts clamp a thin stamped flange along its length, while the larger corner fasteners locate the pan at its ends. Separate the two groups before you start rather than working around the pan with one setting.
Will tightening the pan bolts more stop an oil-pan leak?+
No — it usually makes it worse. Extra torque bows the stamped flange between bolts, which opens the gasket gap rather than closing it. Flatten pulled bolt holes, place sealant only where the gasket instructions call for it, and tighten in gradual alternating passes.
Do these values apply to an aftermarket cast pan?+
No. They apply to the pan and hardware arrangement supplied or specified for the cited 350 HO Deluxe package. Earlier two-piece seals, aftermarket cast pans, one-piece gasket kits and mixed-size production hardware can use different location groups entirely.
Technical sources
TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.
1Chevrolet Performance 350 HO Deluxe engine specificationsPrimary Chevrolet Performance guide specifying 35 lb-ft for the starter, 97 in-lb for the front cover and oil-pan side rails, 15 lb-ft for the oil-pan corners and drain plug, and 63 lb-ft for the balancer bolt on this package.↗