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Torque Values and Tune Up Specifications
for Datsun Roadsters
R-16 (1600cc OHV) Engine
| Headbolts (aluminum head) | 50 ft-lb |
| Headbolts (steel) | 50 (1) |
| Connecting rod bolts | 45 |
| Main caps (3 main - SAE) | 75 |
| Main caps (5 main - Metric) | 65 |
| Flywheel to crankshaft | 35 |
| Manifolds | 10 |
| Camshaft bolt | 30 |
| Valve Cover | 10 |
| Crank Pulley | 100 (2) |
U-20 (2000cc OHC) Engine
| Headbolts | 65 ft-lb |
| Connecting rod bolts | 65 |
| Main caps | 65 |
| Flywheel | 60 |
| Manifolds | 10 |
| Camshaft (two bolts) | 13 |
| Jackshaft | 35 |
| Valve Cover | 5 |
| Clutch Cover | 25 |
| Crank Pulley | 150 |
Notes
(1) I know I have seen different specs for the aluminum and steel heads. The bolts are the same, but the early Bob Sharp manual recommended 60 ft-lbs. for the steel head when used for racing, otherwise 45 to 50 ft.lbs.
(2) I've see it also listed at 150 ft-lbs. Metric engines specified 145 ft-lbs; Early SAE engine listed only 100 ft-lbs.
Common Tune Up Numbers
Valve Clearance
| 1500/1600 | .017" HOT (Recommended) |
| | .021" Cold |
| 2000 | intake .008" HOT |
| | exhaust .012" HOT |
| Points | .018-.021" |
| Dwell | 49-52 degrees |
| Plugs | .027-.031" |
Ignition Timing (at idle)
| '66-'67 1600 | 16 BTDC at 600 rpm |
| '68-'70 1600 | 0 TDC at 700 rpm |
| '67 SU 2000 | 16 BTDC at 700 rpm |
| '67 Solex 2000 | 20 BTDC at 600 rpm |
| '68-'70 2000 | 0 TDC
at 700 rpm |
THE ABOVE ASSUMES A STOCK ORIGINAL DISTRIBUTOR - after 25 years, check what is in there! Look for the DISTRIBUTOR FAQ for details on what to check.
©1996, Thomas Walter
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