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- | Also see [[Changing Head Gasket]] for torque specifications and procedure. A-series head bolts are designed to be reused; they are not Torque-To-Yeild (TTY) bolts. | + | A-series head bolts are designed to be reused; they are not Torque-To-Yield (TTY) bolts. |
+ | = Maintenance Schedule = | ||
+ | Retighten cylinder head bolts every 24 months or 24000 miles whichever comes first. | ||
+ | |||
+ | [http://ddgonzal.members.winisp.net/wiki/om1972/32.jpg http://ddgonzal.members.winisp.net/wiki/om1972/thumbs/32.jpg] | ||
+ | |||
+ | 600 mile service | ||
+ | 24 months/24000 miles | ||
+ | |||
+ | See [[Changing Head Gasket]] for torque specifications and procedure. | ||
+ | |||
+ | = Overview = | ||
[http://datsun1200.com/modules/myalbum/photo.php?lid=22286 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/22286.jpg] | [http://datsun1200.com/modules/myalbum/photo.php?lid=22286 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/22286.jpg] | ||
Revision as of 22:25, 15 July 2012
A-series head bolts are designed to be reused; they are not Torque-To-Yield (TTY) bolts.
Maintenance Schedule
Retighten cylinder head bolts every 24 months or 24000 miles whichever comes first.
600 mile service 24 months/24000 miles
See Changing Head Gasket for torque specifications and procedure.
Overview
Original Lo-torque bolts (B10 & early B110 -1172) - 36 ft-lb
- 11056-18001 BOLT-FIXING CYLINDER HEAD SHORT
- 11057-18000 BOLT-FIXING CYLINDER HEAD LONG
- 11058-18000WASHER-LOCK FIXING CYLINDER HEAD
Newer medium torque bolts (1272-) - 43 ft-lb
- 11056-H1000 BOLT-FIXING CYLINDER HEAD SHORT (9 needed) $2.90
- 11057-H1000 BOLT-FIXING CYLINDER HEAD LONG [Center bolt] $2.51
- 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD $2.28
A12GX, A12T, A12S, A13, A14, A15, A12A - 58 ft-lbs
- 11056-H2301 HEAD BOLT SHORT (9 needed) $3.96
- NOTE Some newer lo-power (round port) A12S are spec'd for 11056-H1000
- 11057-H2301 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (TO 6/73) $3.88
- one needed
- 11057-H5000 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (FROM 7/73) $4.03
- one needed
- Also used by Z24 and KA24E
- superceeded 11057-H5700?
A12: Long middle bolt marked 'T'
A14: Long middle bolt marked '13'
Hi-torque bolts marked "13" on the head. Remove the valve cover to verify.
head bolts Cro-Mo-V steel 13T
Lock Washer
- 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD -8504 $2.28
- 11058-21002 Washer Cyl Head 8504- $2.57