Nissan RB26DETT Head Bolt Torque Specs and Sequence
Nissan RB26DETT Head Bolt Torque Specs and Sequence with application boundaries, staged tightening guidance.
The Nissan R32 RB26DETT engine manual specifies 29 N·m, then 108 N·m, complete loosening, 29 N·m again, and finally an 85–90° turn for the fourteen M12 head bolts. The manual also gives 103–113 N·m only as the alternative when an angle wrench is not used.
The Nissan R32 RB26DETT engine manual specifies 29 N·m, then 108 N·m, complete loosening, 29 N·m again, and finally an 85–90° turn for the fourteen M12 head bolts. The manual also gives 103–113 N·m only as the alternative when an angle wrench is not used.
Covers the production R32 RB26DETT factory-bolt procedure in the linked Nissan engine manual. R33/R34 revisions, N1 parts, resurfaced decks, nonstandard metal gaskets and aftermarket studs require their matching service or fastener documentation.
Interactive RB26DETT Inline-Six center-out sequence aid
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This balanced pattern is an orientation aid; use the exact numbered manufacturer diagram for assembly.
Nissan Rb26dett Head Bolt Torque Specs
| APPLICATION / ITEM | SPECIFICATION | NOTES |
|---|---|---|
| M12 stage 1 | 29 N·m (22 lb-ft) | Exact 14-bolt sequence |
| M12 stage 2 | 108 N·m (80 lb-ft) | Repeat sequence |
| M12 stage 3 | Loosen completely | Return all bolts to zero |
| M12 stage 4 | 29 N·m (22 lb-ft) | Re-establish base torque |
| M12 stage 5 | 85–90° | Use an angle wrench |
| M6 end bolts | 9–12 N·m | Separate small-fastener value |
Oil the factory bolt threads as specified, work through the exact fourteen-bolt sequence, and never estimate the final angle visually. The small M6 end bolts use a separate 9–12 N·m specification and must not receive the M12 stages.
Application boundaries for RB26DETT Inline-Six
Covers the production R32 RB26DETT factory-bolt procedure in the linked Nissan engine manual. R33/R34 revisions, N1 parts, resurfaced decks, nonstandard metal gaskets and aftermarket studs require their matching service or fastener documentation.
Oil the factory bolt threads as specified, work through the exact fourteen-bolt sequence, and never estimate the final angle visually. The small M6 end bolts use a separate 9–12 N·m specification and must not receive the M12 stages.
Nissan RB26DETT Inline-Six 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.
Procedures used with this specification
These steps are the same for every vehicle in this family, so they are documented once rather than repeated on each page. The values above remain specific to this Nissan RB26DETT Inline-Six.
Nissan RB26DETT Head Bolt Torque Specs and Sequence FAQs
What is the head bolt torque on an RB26DETT?+
The R32 RB26DETT engine manual specifies 29 N·m (22 lb-ft), then 108 N·m (80 lb-ft), then complete loosening, then 29 N·m again, and finally an 85–90° turn, for the fourteen M12 bolts.
Why does the procedure loosen the bolts completely partway through?+
The loosen-and-retighten step returns all bolts to zero so the final angle stage starts from a known, uniform base torque rather than from whatever load each bolt happened to retain.
What if I do not have an angle wrench?+
The manual gives 103–113 N·m only as the alternative for that case. Never estimate the final angle visually — use the published torque alternative instead.
Do the small M6 bolts use the same specification?+
No. The M6 end bolts have a separate 9–12 N·m specification and must never receive the M12 stages.
Technical sources
TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.
1Nissan R32 engine service manualFactory engine-manual pages identify the RB26DETT and explicitly list its 1-5-3-6-2-4 firing order.↗