Camshaft

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Category: Valvetrain

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Revision as of 04:39, 14 February 2012 ddgonzal (Talk | contribs) (->Installation) <- Previous diff		Current revision ddgonzal (Talk | contribs)
Line 1:		Line 1:
-	Datsun 1200's A12 engine uses a roller chain-driven camshaft. The camshaft is located on the right side of the engine block, and drives the valves via pushrods and rocker arms. The camshaft also drives the [[Oil pump]] and distributor. Camshafts are physically different starting with 1974 model year engines, because the newer engines have the distributor in a different location.	+	The camshaft slides into the right side of the engine block and drives the valves via [[pushrods]] and [[rocker arms]]. The camshaft also drives the [[Oil pump]] and [[distributor]]. The camshaft is driven by the crankshaft via a double-row roller chain, which is extremely durable and long-lasting. Camshafts are physically different starting with 1974 model year engines, because the newer engines have the distributor in a different location.
	= Also See=		= Also See=
Line 5:		Line 5:
	* [[Camshaft Comparison]]		* [[Camshaft Comparison]]
	* [[Camshaft Timing]]		* [[Camshaft Timing]]
-		+	* New Camshaft Break-in: See [[Camshaft replacement]]
-	== Cam Interchange ==	+	* Installation: See [[Camshaft replacement]]
-	Datsun 1200 engines, with the distributor at the front, use a single drive gear to drive both the oil pump as well as the distributor. Only Datsun 1970-1973 A12 engines and A10 engines use this arrangement.	+	* Timing: See [[Camshaft replacement]]
		+	* Adjustable Cam Gear: See [[Adjustable Cam Gear]]
-	From 1974 all Datsun A-series engines (other than A10) used a second drive gear as the distributor was now re-located back where the earlier fuel pump once was.	+	= Overview =
		+	Camshaft inserted and U-Plate bolted down
		+	<br>{{PhotoAlbum|24832.jpg|24832|Datsun%201200/wiki}}
-	Strict interchange	+	Camshaft after installation is visible from below
-	* 1966-1973 cams interchange	+	<br>{{Album|25796}}
-	* 1974-up cams interchange	+
		+	With pulley temporarily installed, reading for insertion into the block
		+	<br>{{Album|30405}}
-	Loose Interchange	+	Camshaft Plate (u-plate): See [[Camshaft replacement]]
-	* Late cam [two gears] = can be used in all engines, but conditions apply for early blocks	+	<br>{{Album|30406}}
-	* Early cam [one gear] = Can be used only in early engines, if you want to use a standard type distributor ignition system.	+
-	You can use the later cam in the earlier block as long as you block off the fuel pump mounting & run a different pump [electric?], but if you wish to use the distributor in a later engine, then the earlier cam will not work as you get a fuel pump eccentric instead of a drive gear at that point.	+
-	== Valve Timing Specifications ==	+	= Oiling =
-	Also see: [[A12GX Engine]]	+	The camshaft is fully pressure-oiled. The center bearing journals have holes in them to let oil pressure into the center of the cam, and there are holes on each cam lobe to let oil out and thereby lubricate the lifters.
-	* A12: 248°, .315" (8 mm) lift	+	{{Album|19482}}
-	* A12GX: 256°, .331 (8.4mm) lift	+
-	Here are the specs used in the standard B110 camshaft (from 1973 USA factory manual):	+	= Camshaft Specifications =
-	* Exhaust open duration: 248 degrees	+	Datsun 1200 1970-1973
-	* Intake open duration: 248 degrees	+	A12: 248°, .315" (8 mm) lift
-	* Intake opens at: 14 degrees BTDC	+	A12GX: 256°, .331 (8.4mm) lift
-	* Intake closes at: 54 degrees ABDC	+
-	* Exhaust opens at: 56 degrees BBDC	+
-	* Exhaust closes at: 12 degrees ATDC	+
-	NOTE: It is unclear at which valve lift specifications this is measured at. So be wary of comparing other camshaft specs.	+
		+	Here are the specs used in the standard B110 camshaft:
	B = before		B = before
	A = after		A = after
		+	BDC = Bottom Dead Center
	TDC = Top Dead Center		TDC = Top Dead Center
-	== New Camshaft Break-in ==	+	Exhaust open duration: 248 degrees
-	See [[Camshaft replacement]]	+	Intake open duration: 248 degrees
		+	Intake opens at: 14 degrees BTDC
		+	Intake closes at: 54 degrees ABDC
		+	Exhaust opens at: 56 degrees BBDC
		+	Exhaust closes at: 12 degrees ATDC
		+	NOTE: It is unclear at which valve lift specifications this is measured at. So be wary of comparing other camshaft specs.
-	== Installation ==	+	For other A-series camshafts, see [[Camshaft Comparison]].
-	See [[Camshaft replacement]]	+
-		+
-	=== Timing ===	+
-	See [[Camshaft replacement]]	+
	= Interchange =		= Interchange =
-	For the A-series engine:	+	Datsun 1200 engines, with the distributor at the front, use a single drive gear to drive both the oil pump as well as the distributor. Only Datsun 1970-1973 A12 engines and A10 engines use this arrangement.
-	* All 1967-1973 camshafts interchange	+
-	* All 1974-2007 camshafts interchange	+
-	** In the [[A Engine Redesign]] for 1974 the location of fuel pump and alternator drives on the cam moved.	+
-	You can use the 1974-up camshaft in earlier engines. Earlier cams fit newer engines, but will not drive the distributor.	+
-	Engine displacment doesn't matter. In certain years, all A12 A14 and A15 engines were fitted with the *same* camshaft.	+	From 1974 all Datsun A-series engines (other than A10) used a second drive gear as the distributor was now re-located back where the earlier fuel pump once was.
-	For example:	+	Strict interchange
-	* 1982 B310 USA	+	* 1966-1973 cams interchange
-	*: Part Number 13001-H9800 CAMSHAFT A12A, A14, A15 USA	+	* 1974-up cams interchange
-	*: IN: 244, EX: 248	+
		+	In the [[A Engine Redesign]] for 1974 the location of fuel pump and alternator drives on the cam moved.
-	However, in other years and markets different specs were used. For example:	+	Loose Interchange
-	* 1982 B310 CANADA:	+	* Late cam [two gears] = can be used in all engines, but conditions apply for early blocks
-	** A12A Part Number 13001-H5000 CAMSHAFT A12A CAN	+	* Early cam [one gear] = Can be used only in early engines, if you want to use a standard type distributor ignition system.
-	**: IN: 248, EX: 248	+	You can use the later cam in the earlier block as long as you block off the fuel pump mounting & run a different fuel pump [electric?], but if you wish to use the distributor in a later engine, then the earlier cam will not work as you get a fuel pump eccentric instead of a drive gear at that point.
-	** A15 Part Number 13001-H9800 CAMSHAFT A14 CAN	+
-	*: IN: 244, EX: 248	+
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=18422 http://datsun1200.com/modules/myalbum/photos/thumbs/18422.jpg]	+	You can use the 1974-up camshaft in earlier engines. Earlier cams fit newer engines, but will not drive the distributor.
-	= Adjustable Cam Gear =	+	For more interchange details, see [[Camshaft Comparison]]
-	Fitting an adjustable Camshaft gear lets you fine tune the timing. The cam vendor's recommendations are usually best, but retarding the cam a degree or two will generall shift the torque curve higher up in the RPM range. Advancing the cam will (usually) lower the power curve a few RPM. Adjustable gears come in a few basic kinds:	+
-	* Multi-key. Rollmaster had one with nine adjustible keys in the crank sprocket	+
-	* Multi-hole. Using different holes	+
-	* Variable: Slotted holes allow a continuously variable range	+
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=682 http://datsun1200.com/modules/myalbum/photos/thumbs/682.jpg] Tomei [http://datsun1200.com/modules/myalbum/photo.php?lid=3639 http://datsun1200.com/modules/myalbum/photos/thumbs/3639.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=3640 http://datsun1200.com/modules/myalbum/photos/thumbs/3640.jpg]	+	= Aftermarket Camshafts =
		+	Replacement camshafts don't have to come from [[wikipedia:Nissan|Nissan]]. You can get them from most cam grinders <i>even if they are not listed in their public catalog</i>.
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=7339 http://datsun1200.com/modules/myalbum/photos/thumbs/7339.jpg] Rollermaster	+	See main article: [[Camshaft_Comparison#Aftermarket_Grinds|Aftermarket Grinds]]
-		+
-	= Cam Profiles =	+
-	There are basically four factory grinds:	+
-	* small bore grind	+
-	* large bore grind	+
-	* performance grind, used in GX, Twin-carb, and EFI engines	+
-	* emission grind, used in 1981-1982 USA engines	+
-		+
-	However, these can be fitted to any engine. The emission grind cam was used in A12A, A14 and A15 engine -- all with same cam part number.	+
-		+
-	== 1967-1973 ==	+
-	13001-H7000 ASSY-CAMSHAFT USA B110 A12 0772- 0 13001-H2300	+
-	13001-H2300 CAMSHAFT B110 JPN A12 GX	+
-	13001-H1000 CAMSHAFT B110 USA JPN A12	+
-	13001-18001 CAMSHAFT B10 JPN A10 0470-	+
-	* replaces 13001-18000 & 13001-H0100	+
-	13001-18000 CAMSHAFT JPN B10 A10	+
-	13001-H0100 CAMSHAFT JPN B10 A10	+
-		+
-	ADVERTISED DURATION	+
-	248/248 duration	+
-	* 13001-H1000 A12	+
-		+
-	256/256 duration .331 lift	+
-	* 13001-H2300 A12 GX	+
-		+
-	== 1974-up ==	+
-	EMISSION PROFILE	+
-	13001-H9800 CAMSHAFT [Typical use: 1981-1982 USA B310 & N10]	+
-	*: 244/248 duration	+
-	** USA B310 A14,A15 B310 0880-	+
-	** USA B310 A12A 0880- B310	+
-		+
-	PERFORMANCE STOCK PROFILE	+
-	13001-H5700 CAMSHAFT [Typical use: Performance engine]	+
-	*: 248/256 duration .331 lift	+
-	** JPN B210 A12T, A14T	+
-	** JPN B310 A14E, A15E	+
-		+
-	SMALL BORE PROFILE	+
-	* 13001-H5000 CAMSHAFT [Typical use: A12S]	+
-	*: 248/248 duration	+
-	** JPN B120 A12S	+
-	** JPN B210 A12S	+
-	** JPN B310 A12S, A13S	+
-	** USA B310 A12A 0879-0780	+
-	** CAN B310 A12A	+
-		+
-	LARGE BORE PROFILE	+
-	* 13001-H6200 ASSY-CAMSHAFT [Typical use: A14/A15]	+
-	*: 248/256 duration	+
-	** JPN B210 A14S	+
-	** USA B210 A13, A14	+
-	** USA B210 F10 A14	+
-	** USA B310 A14,A15 -0780	+
-	** JPN B310 A14S, A15S	+
-		+
-	ADVERTISED DURATION	+
-		+
-	248/248 duration (standard small bore)	+
-	* 13001-H5000	+
-		+
-	248/256 duration (standard large bore)	+
-	* 13001-H6200	+
-		+
-	256/256 duration (performance engines)	+
-	* 13001-H5700 .331 lift	+
-		+
-	244/248 duration (Late USA emission)	+
-	* 13001-H9800	+
-		+
-	= Nissan Competition Parts =	+
-	<!-- editors, please don't change substance of the below, it is from Nissan -->	+
-	CAMSHAFTS & RELATED COMPONENTS (A-SERIES)	+
-		+
-	PART NO. DESCRIPTION QTY REQ.	+
-	* 13001-H2300 GX CAMSHAFT (.331"/256	+
-	<!-- end editors note -->	+
-		+
-	* 13001-H5700 A14E stock 256° 20/62/65/35/12/15 lift 8.4, clearance .35	+
-	* 13001-H5710 70° camshaft 280° 38/62/65/35/12/15 lift 9.4, clearance .25	+
-	** recommended for rallies	+
-	** limit RPM 7600, normal RPM 7200	+
-	* 13001-H5711 74° camshaft 296° 46/70/73/43/12/15 lift 9.4, clearance .25	+
-	** recommended for gymkhanas	+
-	** limit RPM 7800, normal RPM 7400	+
-	* 13001-H5712 80° camshaft 320° 58/82/85/55/12/15 lift 10.5, clearance .25	+
-	** recommended for racing	+
-	** limit RPM 8500, normal RPM 8000	+
-	* 13001-H5713 82° camshaft 328° 62/86/62/55/12/12 lift 10.5, clearance .25	+
-		+
-	= Aftermarket Camshafts =	+
-	Replacement camshafts don't have to come from [[wikipedia:Nissan|Nissan]]. You can get them from most cam grinders.	+
	Most cam grinders will make a camshaft for a Datsun 1200. Most cams are made on request you won't find it listed in a catalog. You supply a used cam, they do the rest.		Most cam grinders will make a camshaft for a Datsun 1200. Most cams are made on request you won't find it listed in a catalog. You supply a used cam, they do the rest.
-	For example, Camtech advertises [http://www.camtechcams.com.au/niss_4cyl_a12a14.html these camshaft profiles] for Datsun A engines:	+	For example, Camtech advertised these camshaft profiles for Datsun A engines:
	* #618 RPM RANGE 2000-6000 239/231 (Advertised Duration)		* #618 RPM RANGE 2000-6000 239/231 (Advertised Duration)
	* #639 RPM RANGE 2400-6400 254/254		* #639 RPM RANGE 2400-6400 254/254
Line 193:		Line 91:
	= Part Numbers =		= Part Numbers =
-	SET-BUSHING CAMSHAFT -- See [[Block]]	+	SET-BUSHING CAMSHAFT &mdash; See [[Block]]
	* Not normally replaced as part of an overhaul		* Not normally replaced as part of an overhaul
Line 222:		Line 120:
	08915-13610 WASHER-LOCK FIXING CAMSHAFT PLATE		08915-13610 WASHER-LOCK FIXING CAMSHAFT PLATE
-	= Parts Suppliers =	+	N10
-	See: [[Parts Sources]] for current details and contact information for these vendors.	+	1979-1980 A14 13001-H6200
		+	1871 A15 13001-H9800
-	* Tomei: lifters, cams, sprockets, etc	+	== Europe ==
-	* Iskenderian - legendary California hot rod Cam Grinder - [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=22314&forum=1 mperdue has an Isky cam]	+	C120 A15 Vanette 13001-H6200 0681-0687
-	* Crane: cams, springs, lifters	+	GC22 A15 13001-H9800 0986-
-	* Datrats	+
		+	== Japan ==
		+	B120 Sunny Truck
		+	13001-H1000 1971-1973
		+	13001-H5000 1976-
		+
		+	C120 Vanette 7810-8811
		+	13001-H5000 A12 7810-8509
		+	13001-H6200 A14 7810-8106
		+	13001-H6200 A15.K 8006-8209
		+	13001-H9800 A15 8209-
		+	13001-H9800 A15.(V,T) 8106-8209
		+
		+	C22 Vanette 8509-9403
		+	13001-H5000 A12
		+	13001-H9800 A15
		+
		+	GC22 Vanette Largo 8605-9303
		+	13001-H9800 A15
		+
		+	TC22 Vanette Truck 8811-9403
		+	13001-H5000 A12
		+	13001-H9800 A15
		+
		+	= Parts Suppliers =
		+	* {{archive|web.archive.org/web/20120111154757/http://www.wadecams.com|Wade Cams}}
		+	* [[Tomei]]: lifters, cams, sprockets, etc
		+	* {{search|Iskenderian|Iskenderian}}: legendary California hot rod Cam Grinder
		+	* {{search|Crane+Cams|Crane Cams}}: cams, springs, lifters
		+	* [[Datrats]] Australia
	* APT		* APT
	* Malvern Racing		* Malvern Racing
	* Yella Terra, roller pushrods		* Yella Terra, roller pushrods
-	* [http://www.camtechcams.com.au/ CamTech] - Australia	+	* {{archive|web.archive.org/web/20090727080200/http://www.camtechcams.com.au:80/|CamTech Cams}} - Australia
	[[Category:Valvetrain]]		[[Category:Valvetrain]]

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Current revision

The camshaft slides into the right side of the engine block and drives the valves via pushrods and rocker arms. The camshaft also drives the Oil pump and distributor. The camshaft is driven by the crankshaft via a double-row roller chain, which is extremely durable and long-lasting. Camshafts are physically different starting with 1974 model year engines, because the newer engines have the distributor in a different location.

Contents 1 Also See 2 Overview 3 Oiling 4 Camshaft Specifications 5 Interchange 6 Aftermarket Camshafts 7 Part Numbers 7.1 USA 7.2 Europe 7.3 Japan 8 Parts Suppliers

Also See

* Camshaft replacement
* Camshaft Comparison
* Camshaft Timing
* New Camshaft Break-in: See Camshaft replacement
* Installation: See Camshaft replacement
* Timing: See Camshaft replacement
* Adjustable Cam Gear: See Adjustable Cam Gear

Overview

Camshaft inserted and U-Plate bolted down
Album click to view

Camshaft after installation is visible from below
Album 25796

With pulley temporarily installed, reading for insertion into the block
Album 30405

Camshaft Plate (u-plate): See Camshaft replacement
Album 30406

Oiling

The camshaft is fully pressure-oiled. The center bearing journals have holes in them to let oil pressure into the center of the cam, and there are holes on each cam lobe to let oil out and thereby lubricate the lifters.

Album 19482

Camshaft Specifications

Datsun 1200 1970-1973
A12: 248°, .315" (8 mm) lift
A12GX: 256°, .331 (8.4mm) lift

Here are the specs used in the standard B110 camshaft:

B = before
A = after
BDC = Bottom Dead Center
TDC = Top Dead Center

Exhaust open duration: 248 degrees
Intake open duration: 248 degrees
Intake opens at: 14 degrees BTDC
Intake closes at: 54 degrees ABDC
Exhaust opens at: 56 degrees BBDC
Exhaust closes at: 12 degrees ATDC

NOTE: It is unclear at which valve lift specifications this is measured at. So be wary of comparing other camshaft specs.

For other A-series camshafts, see Camshaft Comparison.

Interchange

Datsun 1200 engines, with the distributor at the front, use a single drive gear to drive both the oil pump as well as the distributor. Only Datsun 1970-1973 A12 engines and A10 engines use this arrangement.

From 1974 all Datsun A-series engines (other than A10) used a second drive gear as the distributor was now re-located back where the earlier fuel pump once was.

Strict interchange

• 1966-1973 cams interchange
• 1974-up cams interchange

In the A Engine Redesign for 1974 the location of fuel pump and alternator drives on the cam moved.

Loose Interchange

• Late cam [two gears] = can be used in all engines, but conditions apply for early blocks
• Early cam [one gear] = Can be used only in early engines, if you want to use a standard type distributor ignition system.

You can use the later cam in the earlier block as long as you block off the fuel pump mounting & run a different fuel pump [electric?], but if you wish to use the distributor in a later engine, then the earlier cam will not work as you get a fuel pump eccentric instead of a drive gear at that point.

You can use the 1974-up camshaft in earlier engines. Earlier cams fit newer engines, but will not drive the distributor.

For more interchange details, see Camshaft Comparison

Aftermarket Camshafts

Replacement camshafts don't have to come from Nissan. You can get them from most cam grinders even if they are not listed in their public catalog.

See main article: Aftermarket Grinds

Most cam grinders will make a camshaft for a Datsun 1200. Most cams are made on request you won't find it listed in a catalog. You supply a used cam, they do the rest.

For example, Camtech advertised these camshaft profiles for Datsun A engines:

• #618 RPM RANGE 2000-6000 239/231 (Advertised Duration)
• #639 RPM RANGE 2400-6400 254/254
• #621 RPM RANGE 2600-6800 260/264
• #609 RPM RANGE 3200-7200 277/284
• #608 RPM RANGE 4000-7800 290/295
• #604 RPM RANGE 4400-8200 301/310

Of course, the real RPM range will depend on:

• the size of the engine, larger engine will need a slighter larger cam for same effective RPM range
• the other equipment on the engine. For example, a stock Carburetor won't make more power over 6000 RPM

"Advertised Duration" means you should only compare these numbers with grinds from the same manufacturer. Other vendors may measure it differently.

Part Numbers

SET-BUSHING CAMSHAFT — See Block
* Not normally replaced as part of an overhaul

LIFTER-VALVE
13231-H1000 A12
13231-H1001 1970-1983 A12, A14, A15 

B110 ASSY-CAMSHAFT
13001-H1000 USA, JDM
13001-H2300 GX
13001-H7000 USA 0772-

13010-18001 PLATE-camshaft
second source 13010-18015
* 81-10616 BOLT (2)
* 89-15136 WASHER-lock (2)

USA

B110 RAW LIST
13001-H7000 ASSY-CAMSHAFT
13001-H1000 CAMSHAFT
11023-78200 PLUG-TAPER
13032-18000 DOWEL-CAMSHAFT GEAR
13010-18001 PLATE-CAMSHAFT
08110-6161A BOLT-FIXING CAMSHAFT PLATE
01111-00022 BOLT-FIXING CAMSHAFT PLATE
08915-1361A WASHER-LOCK FIXING CAMSHAFT PLATE
08915-13610 WASHER-LOCK FIXING CAMSHAFT PLATE

N10
1979-1980 A14 13001-H6200
1871 A15 13001-H9800

Europe

C120 A15 Vanette 13001-H6200 0681-0687
GC22 A15 13001-H9800 0986-

Japan

B120 Sunny Truck
13001-H1000 1971-1973
13001-H5000 1976-

C120 Vanette 7810-8811
13001-H5000 A12 7810-8509
13001-H6200 A14   7810-8106
13001-H6200 A15.K 8006-8209
13001-H9800 A15 8209-
13001-H9800 A15.(V,T) 8106-8209

C22 Vanette 8509-9403
13001-H5000 A12 
13001-H9800 A15

GC22 Vanette Largo 8605-9303
13001-H9800 A15

TC22 Vanette Truck 8811-9403
13001-H5000 A12 
13001-H9800 A15

Parts Suppliers

• Wade Camsᴬᴿᶜᴴᴵⱽᴱ
• Tomei: lifters, cams, sprockets, etc
• Iskenderianᴳ: legendary California hot rod Cam Grinder
• Crane Camsᴳ: cams, springs, lifters
• Datrats Australia
• APT
• Malvern Racing
• Yella Terra, roller pushrods
• CamTech Camsᴬᴿᶜᴴᴵⱽᴱ - Australia

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