Head Bolts

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Categories: Cylinder Heads | Engine Mechanical

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Revision as of 12:28, 27 May 2012 ddgonzal (Talk | contribs) <- Previous diff		Current revision ddgonzal (Talk | contribs)
Line 1:		Line 1:
-	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, per the [[Periodical Maintenance and Lubrication Schedule]].
-	Original Lo-torque bolts (B10 & early B110 -1172) - 36 ft-lb	+	{{OwnersManual|32|32|24 months/24000 miles}}
-	* 11056-18001 BOLT-FIXING CYLINDER HEAD SHORT	+
-	* 11057-18000 BOLT-FIXING CYLINDER HEAD LONG	+
-	* 11058-18000WASHER-LOCK FIXING CYLINDER HEAD	+
		+	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]
		+	* M10 x 97mm
		+	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	+	Note 'T' bolt for center of early A12 engine. The center bolt is thinner to allow [[Cylinder_Head_Identification#Cylinder_head_oil_passage|oil to flow around]] it up to the rocker shaft.
-	* 11056-H2301 HEAD BOLT SHORT (9 needed) $3.96	+	<br>{{Album|24528}}
-	** 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 A10/A12/A14/A15, but:
		+	* A14/A15 require the stronger bolts (marked '13')
		+	* A14/A15 has one longer bolt (marked '13')<br>{{UploadPostH|174_61f9b21aa96ea.jpg|496525}}
		+	* redesigned A12 use the longer bolt (marked '12T')
		+
		+	A14/A15 long center bolt
		+	<br>{{Album|23623}} {{Album|22286}}
		+
		+	* '12' bolts are the medium torque version, used on all A12 after about 1972. The 'T' center bolt matches, and is for the early A12. The longer 'T12' bolt is for the late A12 (mid-distributor version) and is the same length as the A14/A15 '13' center bolt
		+
		+	* the '13' bolts were designed for the B110 GX, but used for A14 and A15 afterwards. The center bolt is apparently marked '13', short for early A12, and long A14/A15.
		+
		+
		+	= Strengthened Cylinder Head Bolts =
		+	stronger bolts (marked '13')
		+	<br>{{Album|24733}}
		+
		+	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
		+	{{UploadPost|174_61f9b20aab940.jpg|496525}}
		+	{{UploadPost|174_61f9b226472ee.jpg|496525|was=Photo\1973_head_bolt.jpg}}
		+
		+	'12' bolts
		+	<br>{{UploadPost|174_50033e73ecea0.jpg|413008}} {{UploadPost|174_50033e859f7a8.jpg|413008}} {{UploadPost|174_50033e8cbbcd9.jpg|413008}}
		+
		+	Better to use the GX '13' center bolt, which is high-tensile chromoly V steel
		+	<br>{{Album|4775}} {{UploadPost|7952_4cf7626132cc9.jpg|348263}} {{UploadPost|7952_4cf7639da9b87.jpg|348263}}
		+	<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, but have different torque specs
		+	<br>{{UploadPost|6595_4a2b961066620.jpg|257619}}
		+
		+	'13' LONG center bolt 111mm length
		+	<br>{{Album|30677}} {{Album|30678}}
		+
		+	= Part Numbers =
		+	{{Main|Head 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
		+	* BOLT-FIXING CYLINDER HEAD LONG [Center bolt] $2.51
		+	superseded by 11057-H5000/11057-H5010
		+	* 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
		+	Also used by Z16/Z18/Z20/Z22 (10 per engine)
		+	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-H5700 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (FROM 7/73) $4.03
		+	one needed
		+	Also used by Z24, KA24E, NA20P (10 per engine)
		+	replaced 11057-H5000 (lo-torque version)
		+	* used by 1988- D21/WD21/C22 Z24 engine
		+
		+	A12: Long middle bolt marked 'T' (medium-torque)
		+	<br>A14: Long middle bolt marked '13' (hi-torque)
		+	<br>{{Album|24528}}
	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.
-	<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=23377 http://datsun1200.com/uploads/photos/23377.jpg]	+	<br>{{Album|23377}}
	head bolts		head bolts
Line 36:		Line 103:
	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
		+
		+	{{Album|22287}}
		+
		+	1975 B210 JDM catalog C-260
		+	11056-H1000 BOLT-cylinder head 9 A12S [single carb]
		+	11056-H2301 BOLT-cylinder head 9 A12T [twin carb]
		+	11057-H5000 BOLT-cylinder head 1 A12S [single carb]
		+	11057-H5700 BOLT-cylinder head 1 A12T [twin carb]
		+
		+	1978 B210 JDM catalog C-402
		+	BOLT-CYLINDER HEAD SHORT
		+	* 11056-H1000 9 A12S
		+	* 11056-H2301 9 A14
		+	BOLT-CYLINDER HEAD LONG
		+	* 11057-H5000 1 A12S
		+	* 11057-H5700 1 A14
		+
		+	KA24E - 1989-1993 Nissan 240SX
		+	11057-H5010 10 needed
		+	* Same as Datsun 1200 center bolt
		+
		+	KA24E - 1994-1998 Nissan 240SX
		+	11056-F3F01 10 needed. TTY bolts, do not reuse
		+	* reportedly shorter than Datsun 1200/KA24E SOHC
		+
		+	Z20/Z22 Datsun 720
		+	11056-H2301 10 needed
		+	* Same as Datsun 1200 (9 needed)
		+
		+	Z24 Datsun 720
		+	11057-H5000 10 needed
		+	* Same as late Datsun 1200 (center bolt)
		+
		+	= ARP Head Studs =
		+	{{SeeEx|see=Main|ARP#Cylinder_Head_Studs|ARP}}
-	[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]	+	&#12288;<span style="background-color:LightBlue;">Web Search:</span> {{search|A%E5%9E%8B%E3%83%98%E3%83%83%E3%83%89%E3%83%9C%E3%83%AB%E3%83%88|A&#22411;&#12504;&#12483;&#12489;&#12508;&#12523;&#12488;}}
-	[[Category:Engine Mechanical]]	+	[[Category:Cylinder Heads]][[Category:Engine Mechanical]]{{End}}

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Current revision

A-series head bolts are designed to be reused; they are not Torque-To-Yield (TTY) bolts.

Contents 1 Maintenance Schedule 2 Overview 3 Strengthened Cylinder Head Bolts 4 Part Numbers 5 ARP Head Studs

Maintenance Schedule

Retighten cylinder head bolts every 24 months or 24000 miles whichever comes first, per the Periodical Maintenance and Lubrication Schedule.

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]
* M10 x 97mm
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]

Note 'T' bolt for center of early A12 engine. The center bolt is thinner to allow oil to flow around it up to the rocker shaft.
Album 24528

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 A10/A12/A14/A15, but:

• A14/A15 require the stronger bolts (marked '13')
• A14/A15 has one longer bolt (marked '13')
  Post click for topic
• redesigned A12 use the longer bolt (marked '12T')

A14/A15 long center bolt
Album 23623 Album 22286

• '12' bolts are the medium torque version, used on all A12 after about 1972. The 'T' center bolt matches, and is for the early A12. The longer 'T12' bolt is for the late A12 (mid-distributor version) and is the same length as the A14/A15 '13' center bolt

• the '13' bolts were designed for the B110 GX, but used for A14 and A15 afterwards. The center bolt is apparently marked '13', short for early A12, and long A14/A15.

Strengthened Cylinder Head Bolts

stronger bolts (marked '13')
Album 24733

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
Post 496525
Post 496525

'12' bolts
Post 413008 Post 413008 Post 413008

Better to use the GX '13' center bolt, which is high-tensile chromoly V steel
Album 4775 Post 348263 Post 348263
"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, but have different torque specs
Post 257619

'13' LONG center bolt 111mm length
Album 30677 Album 30678

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
*  BOLT-FIXING CYLINDER HEAD LONG [Center bolt] $2.51
   superseded by 11057-H5000/11057-H5010
* 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
  Also used by Z16/Z18/Z20/Z22 (10 per engine)
  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-H5700 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (FROM 7/73) $4.03
  one needed
  Also used by Z24, KA24E, NA20P (10 per engine)
  replaced 11057-H5000 (lo-torque version)
  * used by 1988- D21/WD21/C22 Z24 engine

A12: Long middle bolt marked 'T' (medium-torque)
A14: Long middle bolt marked '13' (hi-torque)
Album 24528

Hi-torque bolts marked "13" on the head. Remove the valve cover to verify.
Album 23377

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

Album 22287

1975 B210 JDM catalog C-260
11056-H1000 BOLT-cylinder head 9 A12S [single carb]
11056-H2301 BOLT-cylinder head 9 A12T [twin carb]
11057-H5000 BOLT-cylinder head 1 A12S [single carb]
11057-H5700 BOLT-cylinder head 1 A12T [twin carb]

1978 B210 JDM catalog C-402
BOLT-CYLINDER HEAD SHORT
* 11056-H1000 9 A12S
* 11056-H2301 9 A14
BOLT-CYLINDER HEAD LONG
* 11057-H5000 1 A12S
* 11057-H5700 1 A14

KA24E - 1989-1993 Nissan 240SX
11057-H5010 10 needed
* Same as Datsun 1200 center bolt

KA24E - 1994-1998 Nissan 240SX
11056-F3F01 10 needed. TTY bolts, do not reuse
* reportedly shorter than Datsun 1200/KA24E SOHC

Z20/Z22 Datsun 720
11056-H2301 10 needed
* Same as Datsun 1200 (9 needed)

Z24 Datsun 720
11057-H5000 10 needed
* Same as late Datsun 1200 (center bolt)

ARP Head Studs

　Web Search: A型ヘッドボルトᴳ 

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