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Wednesday, June 04, 2008

RB26 Bolt Tightening Torque

Head bolts 12mm x 1.5

The cylinder head tightening sequence is a five step process. The bolts are tightened from the center outwards.
1. Tighten to 22 ft/lb
2. Tighten to 80 ft/lb
3. Loosen bolts completely to 0 ft/lbs
4. Tighten bolts to 22 ft/lbs
5. Turn bolts 85-90 degrees clockwise with an angle wrench, or tighten to 76-83 ft/lbs when torque wrench is used.






ARP headstuds

The head studs are 12 mm. The ARP kit is the 190,000 psi studs. The ARP catalog says 86 ft/lbs with lube. 109 ft/lbs with 30 wt oil.

http://www.arp-bolts.com/Catalog/Cat...atalog024.html

Stock torque is 76-83 ft/lbs.




Main bolts

34-38 ft/lbs from the center outwards. Done in two or three steps.

Rod bolts

Apply engine oil to connecting rods and nuts before assembly
Two steps
1. 10-12 ft/lbs
2. Angle wrench 60-65 degrees.



RB26 Bolt Tightening Torque. Head bolt tightening torque. Main bolt / stud tightening torque. Rod bolt tightening torque.

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