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| Revision as of 05:48, 27 April 2013 ddgonzal (Talk | contribs) (->Part Numbers) <- Previous diff |
Revision as of 06:38, 30 April 2013 ddgonzal (Talk | contribs) (->Overview) Next diff -> |
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| = Overview = | = Overview = | ||
| BOLT-FIXING CYLINDER HEAD SHORT | BOLT-FIXING CYLINDER HEAD SHORT | ||
| - | 11056-18001 36 lb ft | + | 11056-18001 36 lb ft [Original use: A10 & A12] |
| - | 11056-H1000 43 lb ft | + | 11056-H1000 43 lb ft [original use: A12] |
| - | 11056-H2301 58 lb ft | + | 11056-H2301 58 lb ft [original use: A12GX] |
| - | Bolts are the same for A12/A14/A15, but require the stronger bolts. | + | Bolts are the same for A12/A14/A15, but A14/A15 require the stronger bolts. |
| [http://datsun1200.com/modules/myalbum/photo.php?lid=24733 http://datsun1200.com/uploads/photos/24733.jpg] | [http://datsun1200.com/modules/myalbum/photo.php?lid=24733 http://datsun1200.com/uploads/photos/24733.jpg] | ||
| + | 1973 A12 (early engine, upgraded H1000 bolts) | ||
| + | Torque: 40-43 ft-lb | ||
| + | CENTER BOLT: 8 mm central portion (head marked 'T') | ||
| + | OTHER BOLTS: 9 mm | ||
| + | [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/1973_head_bolt.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_1973_head_bolt.jpg] | ||
| + | |||
| + | Note 'T' bolt for center of early A12 engine. This is a low-torque bolt. Better to use the GX '13' center bolt (high-tensile chromoly V steel). | ||
| + | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=24528 http://datsun1200.com/uploads/photos/thumbs/24528.jpg] | ||
| + | |||
| [http://datsun1200.com/modules/myalbum/photo.php?lid=22286 http://datsun1200.com/uploads/photos/thumbs/22286.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=23623 http://datsun1200.com/uploads/photos/thumbs/23623.jpg] | [http://datsun1200.com/modules/myalbum/photo.php?lid=22286 http://datsun1200.com/uploads/photos/thumbs/22286.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=23623 http://datsun1200.com/uploads/photos/thumbs/23623.jpg] | ||
Revision as of 06:38, 30 April 2013
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
BOLT-FIXING CYLINDER HEAD SHORT 11056-18001 36 lb ft [Original use: A10 & A12] 11056-H1000 43 lb ft [original use: A12] 11056-H2301 58 lb ft [original use: A12GX]
Bolts are the same for A12/A14/A15, but A14/A15 require the stronger bolts.
1973 A12 (early engine, upgraded H1000 bolts)
Torque: 40-43 ft-lb
CENTER BOLT: 8 mm central portion (head marked 'T')
OTHER BOLTS: 9 mm
Note 'T' bolt for center of early A12 engine. This is a low-torque bolt. Better to use the GX '13' center bolt (high-tensile chromoly V steel).
Part Numbers
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 ** Also used by Z16/Z18/Z20/Z22 (10 per engine) * 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, KA24E, NA20P (10 per engine) * superceeded 11057-H5700
A12: Long middle bolt marked 'T' (low-torque)
A14: Long middle bolt marked '13' (hi-torque)
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
