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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. |
| - | [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] | + | = Maintenance Schedule = |
| + | Retighten cylinder head bolts every 24 months or 24000 miles whichever comes first. | ||
| - | Original Lo-torque bolts (B10 & early B110 -1172) - 36 ft-lb | + | [http://s297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/owners_manual/1972 http://s297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/owners_manual/1972/th_32.jpg] |
| - | * 11056-18001 BOLT-FIXING CYLINDER HEAD SHORT | + | |
| - | * 11057-18000 BOLT-FIXING CYLINDER HEAD LONG | + | |
| - | * 11058-18000WASHER-LOCK FIXING CYLINDER HEAD | + | |
| - | [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=56794 http://datsun1200.com/uploads/newbb/174_50033e73ecea0.jpg] [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=56794 http://ddgonzal.members.winisp.net/getThumb.aspx?width=140&uri=http://datsun1200.com/uploads/newbb/174_50033e859f7a8.jpg] [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=56794 http://ddgonzal.members.winisp.net/getThumb.aspx?width=140&uri=http://datsun1200.com/uploads/newbb/174_50033e8cbbcd9.jpg] | + | 600 mile service |
| + | 24 months/24000 miles | ||
| - | Newer medium torque bolts (1272-) - 43 ft-lb | + | See [[Changing Head Gasket]] for torque specifications and procedure. |
| - | * 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 | + | |
| + | = Overview = | ||
| + | BOLT-FIXING CYLINDER HEAD SHORT [9 needed, 97 mm length] | ||
| + | 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] | ||
| - | A12GX, A12T, A12S, A13, A14, A15, A12A - 58 ft-lbs | + | [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] |
| - | * 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? | + | |
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=24528 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/24528.jpg] | + | BOLT-CYLINDER HEAD, TO OIL GALLERY [1 needed] |
| - | <br>A12: Long middle bolt marked 'T' | + | 11057-18000 |
| - | <br>A14: Long middle bolt marked '13' | + | 11057-H1000 'T' |
| + | 11057-H2300 '13' for 1967-1973 engines [97 mm length] | ||
| + | 11057-H5700 '13' for 1974-up engines [111 mm length] | ||
| + | |||
| + | Bolts are the same for A12/A14/A15, but A14/A15 require the stronger bolts (marked '13'). | ||
| + | |||
| + | [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. <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=24528 http://datsun1200.com/uploads/photos/thumbs/24528.jpg] | ||
| + | |||
| + | '12' bolts | ||
| + | <br> | ||
| + | [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=413008#forumpost413008 photo] <img size=140>http://datsun1200.com/uploads/newbb/174_50033e73ecea0.jpg</img> | ||
| + | [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=413008#forumpost413008 photo] <img size=140>http://datsun1200.com/uploads/newbb/174_50033e859f7a8.jpg</img> | ||
| + | [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=413008#forumpost413008 photo] <img size=140>http://datsun1200.com/uploads/newbb/174_50033e8cbbcd9.jpg</img> | ||
| + | |||
| + | Better to use the GX '13' center bolt, which is high-tensile chromoly V steel | ||
| + | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=4775 http://datsun1200.com/uploads/photos/thumbs/4775.jpg] [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=348263#forumpost348263 photo] <img size=140>http://datsun1200.com/uploads/newbb/7952_4cf7626132cc9.jpg</img> | ||
| + | [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=348263#forumpost348263 photo] <img size=140>http://datsun1200.com/uploads/newbb/7952_4cf7639da9b87.jpg</img> | ||
| + | <br>"13" bolts were first used on the twin-carb [[A12GX Engine]], as opposed to single-carb engine bolts. "13" bolts can be used with any early engine (they are simply stronger than the earliest bolts). | ||
| + | |||
| + | Note that A12/A12A/A13/A14/A15 all may use the '13' bolts, but the center bolt differs between early engines and late engines. | ||
| + | |||
| + | Center bolt 11057-H5000 and 11057-H5700 are interchangeable | ||
| + | <br><img size=140>http://datsun1200.com/uploads/newbb/6595_4a2b961066620.jpg</img> [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=257619#forumpost257619 click] | ||
| + | |||
| + | = 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 | ||
| + | |||
| + | [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=56794 http://datsun1200.com/uploads/newbb/174_50033e73ecea0.jpg] <img size=140>http://datsun1200.com/uploads/newbb/174_50033e859f7a8.jpg</img> <img size=140>http://datsun1200.com/uploads/newbb/174_50033e8cbbcd9.jpg</img> | ||
| + | |||
| + | 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 | ||
| + | |||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=24528 http://datsun1200.com/uploads/photos/thumbs/24528.jpg] | ||
| + | <br>A12: Long middle bolt marked 'T' (low-torque) | ||
| + | <br>A14: Long middle bolt marked '13' (hi-torque) | ||
| Hi-torque bolts marked "13" on the head. Remove the valve cover to verify. | Hi-torque bolts marked "13" on the head. Remove the valve cover to verify. | ||
| Line 37: | Line 88: | ||
| 13T | 13T | ||
| - | Lock Washer | + | Lock Washer |
| - | * 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD -8504 $2.28 | + | * 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD -8504 $2.28 |
| - | * 11058-21002 Washer Cyl Head 8504- $2.57 | + | * 11058-21002 Washer Cyl Head 8504- $2.57 |
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=22287 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/22287.jpg] | + | [http://datsun1200.com/modules/myalbum/photo.php?lid=22287 http://datsun1200.com/uploads/photos/thumbs/22287.jpg] |
| [[Category:Engine Mechanical]] | [[Category:Engine Mechanical]] | ||
Revision as of 07:18, 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 [9 needed, 97 mm length] 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]
BOLT-CYLINDER HEAD, TO OIL GALLERY [1 needed] 11057-18000 11057-H1000 'T' 11057-H2300 '13' for 1967-1973 engines [97 mm length] 11057-H5700 '13' for 1974-up engines [111 mm length]
Bolts are the same for A12/A14/A15, but A14/A15 require the stronger bolts (marked '13').
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, which is high-tensile chromoly V steel
photo 
photo 
"13" bolts were first used on the twin-carb A12GX Engine, as opposed to single-carb engine bolts. "13" bolts can be used with any early engine (they are simply stronger than the earliest bolts).
Note that A12/A12A/A13/A14/A15 all may use the '13' bolts, but the center bolt differs between early engines and late engines.
Center bolt 11057-H5000 and 11057-H5700 are interchangeable
click
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
