I don't know about the Spectrum. But on a 3 cylinder Metro it 54 foot pounds and on the Sprint it's 48. Depending on which engine you have, you could probably use these specs.
The 1997 Geo 1.0 leader engine cylinder head bolt specification is 120 pounds. The camshaft bolt torque specification is 90 pounds.
valve seal possition
18 lbs
The torque on my 1993 is 46 ft lbs.
The Torque Specs for a 1992 Geo Prizm are 101 ft-lbs @ 4800rpm. In addition it has a capabilty of 102hp at 5800rpms.
so the head wont warp
Geo Spectrum
Torque is 26, 41, 52 ft/lbs. (second pass), 52 ft/lbs (final)
For a 1995 Geo Metro, the torque specifications for the cylinder head bolts typically range from 55 to 65 ft-lbs, depending on the engine type. It's important to follow the proper torque sequence and to consult the vehicle's service manual for exact details, including any specific steps for tightening. Make sure to also check if a specific torque angle is required after the initial torque. Always use a calibrated torque wrench for accuracy.
NO! Geo Storms have a 4X100mm bolt pattern, a Geo Metro has 4X114.3mm bolt pattern.
A Geo Spectrum!
the proper torque specification for the geo storm 1.6 engine is 58 ft lbs ... Always torque in a spiral from the center outwards. Make sure you cleaned up the threads in the block ith a chaser (NOT a tap) before proceeding. And oil the threads on the new head bolts. You should be able to turn the bolts all the way snug with your fingers if the threads are cleaned up correctly. Then torque in 3 stages to the final torque in a spiral from the inner bolts.