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[Datsun 1200 encyclopedia]

Timing Chain

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Categories: Engine Mechanical | Valvetrain

Revision as of 07:04, 3 November 2012
ddgonzal (Talk | contribs)

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Current revision
ddgonzal (Talk | contribs)
(->Checking For Wear)
Line 1: Line 1:
-The [[Timing Chain]] drives the [[Camshaft]]. +The [[Timing Chain]] drives the [[Camshaft]]. The cam pulley is twice as big as the crank pulley, so the cam runs at exactly 1/2 the speed of the crankshaft.
-Also see: [[Timing Cover]]+ Also see:
 + * [[Timing Cover]]
 + * [[Crankshaft Pulley]]
= Overview= = Overview=
-* We have seen a couple of single link timing chains on A12, which is probably the original A10 single row chain. Insist on the factory specified double-chain, like Nissan did for later A10s.+We have seen a couple of single link timing chains on A12, which is the original A10 single row chain. Insist on the factory specified double-chain, like Nissan did for later A10s.
-* A rattle can be the trait of a stretched timing chain. Pinging/pinking has also often been mistaken for timing chain rattle+
 +super-strong Double-Roller chain is standard
 +<br>{{Album|8966}}
 +
 +NOT GOOD - early A10 single-row chain
 +<br>{{Photo|A10_timing_chain.jpg|Datsun%201200/wiki|400}} {{AlbumH|24938|jpg|176}} {{AlbumH|24939|jpg|176}}
 +
 +NOTE: A rattle can be the trait of a stretched timing chain. Pinging/pinking has also often been mistaken for timing chain rattle
A-series engine has a short timing chain -- and with an automatic adjuster -- it rarely stretches or goes bad. A-series engine has a short timing chain -- and with an automatic adjuster -- it rarely stretches or goes bad.
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=24803 http://datsun1200.com/uploads/photos/24803.jpg]+<br>{{Album|24803}}
Compare to the loooooong chaing used in the Nissan KA24E engine: Compare to the loooooong chaing used in the Nissan KA24E engine:
-<br>[http://www.clutchkitcenter.com/media/images/TSET/TS10930/TS10930.jpg click]+<br>{{ExtPhoto|http://www.clutchkitcenter.com/media/images/TSET/TS10930|TS10930.jpg}}
-<br><img size=240>http://www.clutchkitcenter.com/media/images/TSET/TS10930/TS10930.jpg</img>+<br>KA24 often has timing chain problems
-* KA24 often has timing chain problems+ 
 += Checking For Wear =
 +The timing chain can be directly check when the [[Timing Cover]] is off. It can also be indirectly checked for wear even if the engine is all sealed up.
 + 
 +== Covered ==
 +To check the timing chain, remove the distributor cap, and turn the engine by hand clockwise. Then mark the rotor position. Finally turn the engine back anti-clockwise until the rotor just moves. How much did the engine turn before the rotor did?
 + 
 + * A little -- timing chain is OK
 + * considerable -- chain is worn
 + 
 +== Cover Off ==
 +If tensioner spindle projection is more than 15mm, replace chain. Rotate the engine clockwise a bit, then check the distance.
 + 
 +{{Album|24796}}
 + 
 +This ones looks to be at the limit:
 +<br>{{PhotoAlbum|25111-.jpg|25111}}
= Replacement = = Replacement =
-[http://datsun1200.com/modules/myalbum/photo.php?lid=14385 http://datsun1200.com/modules/myalbum/photos/thumbs/14385.jpg] +{{Album|14385}}
== Alignment == == Alignment ==
Check the cam gear alignment. It should be exactly like this: Check the cam gear alignment. It should be exactly like this:
 +<br>{{Upload|174_4ee9b6405e4fc.jpg|465805}}
-[http://datsun1200.com/uploads/newbb/thumbs/174_4ee9b6405e4fc.jpg http://datsun1200.com/uploads/newbb/thumbs/174_4ee9b6405e4fc.jpg]+If it is not lined up, see [[Camshaft_replacement#Timing]].
-If it is not, see [[Camshaft#Timing]].+<blockquote>Do not attempt to match up the bright/marked links on the chain. That only works the first time, as soon as you rotate the engine the links will no longer match (even though it is still in time)</blockquote>
 +Timing here is one tooth off (notice the key on bottom pulley)
 +<br>{{PB2|hh56|evanp1200|Datsun%20A15|PICT0428a.jpg}}
-[http://datsun1200.com/modules/myalbum/photo.php?lid=697 http://datsun1200.com/modules/myalbum/photos/thumbs/697.jpg] +== Slinger ==
 +Don't forget the oil slinger.
-[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/3640jpg]+ [[Piston%2C_Crank_%26_Rod_Part_Numbers|12302-18000]] THROWER-OIL CRANKSHAFT
-[http://datsun1200.com/modules/myalbum/photo.php?lid=7339 http://datsun1200.com/modules/myalbum/photos/thumbs/7339.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=7340 http://datsun1200.com/modules/myalbum/photos/thumbs/7340.jpg]+{{Album|21479}}
- +
- +
-[http://datsun1200.com/modules/myalbum/photo.php?lid=14366 http://datsun1200.com/modules/myalbum/photos/thumbs/14366.jpg]+
= Part Numbers = = Part Numbers =
 +== Kit ==
The timing chain kit (timing set) includes: Cam, Crank, Chain, Tensioner The timing chain kit (timing set) includes: Cam, Crank, Chain, Tensioner
-* CLOYES Part # 94054S [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,11919 RockAuto.com $35.79]+ KIT SET
-* CLEVITE/PERFECT CIRCLE Part # 92602 + CLOYES Part # 94054S [http://www.rockauto.com/catalog/x,carcode,1430310,parttype,5756 RockAuto.com $35.79]
 + {{Photo|9-4054S.jpg|Datsun%201200/Parts}}
-http://info.rockauto.com/Cloyes/94054S.jpg+ CLEVITE/PERFECT CIRCLE Part # 92602
 + ITM 05390500 [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,11919 RockAuto.com $32]
 + {{Photo|053-90500.jpg|Datsun%201200/Parts}}
 + 
 + STC SHIMIZU
 + Timing Kit NIS-A14 (includes sprockets)
 + Timing Chain Kit CK-NIS-A14 (no sprockets)
 + {{Album|14366}}
== Cam Sprocket== == Cam Sprocket==
- (38 teeth)+ 38 tooth Cam Gear (timing gear)
-* CLOYES Part # S47 [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,5722 RockAuto.com $9.41]+ * Sealed Power 223478 $3.50
-http://www.cloyes.com/CloyesMDB/Images/Large/S478.jpg+ * ITM 50022 $4.67
 + * ITM 50021 $4.67
 + * CLOYES Part # S47 [http://www.rockauto.com/catalog/x,carcode,1430310,parttype,5722 RockAuto.com $9.41]
 + {{Photo|S478.jpg|Datsun%201200/Parts}}
 + * Beck/Arnley 0250282 $10.85
 + {{Photo|0250282.jpg|Datsun%201200/Parts}}
 + 
 +== Cam Sprocket Bolt==
 +Special bolt 13082
 +{{Photo|13082-18000.jpg|Datsun%201200/Parts}}
== Chain == == Chain ==
Same as SRL311 with U20 engine (for Jackshaft) Same as SRL311 with U20 engine (for Jackshaft)
-* CLOYES Part # S478 [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,5724 RockAuto.com $9.40]+ CHAIN [http://www.rockauto.com/catalog/x,carcode,1430310,parttype,5724 RockAuto.com]
-* BECK/ARNLEY Part # 0240226+ * CLOYES Part # S478 $9.40
-http://info.rockauto.com/Cloyes/94054.jpg+ * CLOYES 94054 $9.70
 + {{Photo|94054.jpg|Datsun%201200/Parts}}
 + * BECK/ARNLEY Part # 0240226
 + {{Photo|0240226.jpg|Datsun%201200/Parts}}
 + * ITM 2354 $7
-== Tensioner ==+ specs
-* CLOYES Part # 95005 [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,5736 RockAuto.com] $3.90+ Links: 54
 + Pitch: 3/8 inch
 + Rollers: Double
 + Timing Marks: 2
-<img size=240>http://info.rockauto.com/Cloyes/95005.jpg</img>+== Crank Gear Key ==
 +Same key is used for the engine crankshaft pulley.
-== Crank Sprocket ==+ [[Crankshaft_Pulley#Part_Numbers|12316-30000]] KEY-WOODRUF 5X16 2
-19 teeth+
-* CLOYES Part # S477 [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,5723 RockAuto.com] $8.87+== Tensioner ==
 + * CLOYES Part # 95005 [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,5736 RockAuto.com] $3.90
 + {{Photo|95005-1.jpg|Datsun%201200/Parts|width=SM}} {{Photo|95005-2.jpg|Datsun%201200/Parts|width=SM}}
 + * ITM 60004 $6.37
 + {{Photo|60004.jpg|Datsun%201200/Parts}}
-http://www.cloyes.com/CloyesMDB/Images/Large/S477.jpg+ Early non-return tensioner (A10 engine)
 + * 13070-18010 ASS'Y-TENSIONER, non-return B10 [double-chain]
 + {{Photo|13070-18010.jpg}}
-== USA ==+Early A12 engines (to April 1970) also used a tensioner on the Tension side of the chain. Apparently this was deemed unnecessary so was omitted starting May 1970.
- B110 RAW LIST+ 13083-18001 TENSIONER-CHAIN TENSION SIDE -0470
- 13024-H8500 SPROCKET-CAMSHAFT+ 13084-18000 SUPPORT-TENSIONER TENSION SIDE -0470
- 13024-18001 SPROCKET-CAMSHAFT+ 08110-62010 BOLT M6 FIXING TENSIONER -0470
- 13082-18000 BOLT-CAMSHAFT SPROCKET+ {{Photo|13083-18001.jpg|Datsun%201200/Parts}}
- 13030-18000 WASHER-CAMSHAFT+ 
- 08915-2401A WASHER-LOCK+== Crank Sprocket ==
- 08915-14010 WASHER-LOCK+ 19 tooth Crankshaft Gear (Timing Crank Sprocket, Timing Crank Gear)
- 13028-18001 CHAIN-CAMSHAFT+ [http://www.rockauto.com/catalog/x,carcode,1430310,pgname,Engine RockAuto.com]
- 13070-18001 ASSY-TENSIONER CHAIN+ * CLOYES Part # S477 $8.87
- 08120-63510 BOLT-FIXING CHAIN TENSIONER+ {{Photo|S477.jpg|Datsun%201200/Parts}}
- 08915-13610 WASHER-LOCK FIXING CHAIN TENSIONER+ * Sealed Power 223477 $6.17
 + * Beck/Arnley 0250258 $7.36
 + {{Photo|0250258.jpg|Datsun%201200/Parts}}
= Adjustable Cam Gear = = Adjustable Cam Gear =
-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:+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.
 + 
 +{{Photo|ps13kai_0399-img600x450-1335611934sqhy0p82792.jpg|Datsun%201200/Parts}} {{Photo|ps13kai_0399-img600x450-1335611934g5pec482792.jpg|Datsun%201200/Parts}}
 + 
 +Adjustable gears come in a few basic kinds:
* Multi-key. Rollmaster had one with nine adjustible keys in the crank sprocket * Multi-key. Rollmaster had one with nine adjustible keys in the crank sprocket
* Multi-hole. Using different holes * Multi-hole. Using different holes
* Variable: Slotted holes allow a continuously variable range * 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]+fine-tuning the cam ([[Camshaft Timing|Timing the camshaft]])
 +<br>{{Album|3639}} {{Album|3640}}
 + 
 +Datsun100ATurbo homemade camshaft pulley
 +<br>{{Album|2980}}
 + 
 +Pitroad
 +<br>{{AlbumH|682|jpg|303}} {{UploadPost|174_5b2aac25d538b.jpg|488654}}
 + 
 +Tomei
 +<br>{{AlbumH|3639|jpg|459}} {{Album|3640}} {{UploadPost|174_5b2aaa833efea.jpg|488653}} {{UploadPost|174_5b2aaa8bd739b.jpg|488653}}
 + 
 +Rollmaster
 +<br>{{Album|7339}} {{Album|697}}
-[http://datsun1200.com/modules/myalbum/photo.php?lid=7339 http://datsun1200.com/modules/myalbum/photos/thumbs/7339.jpg] Rollermaster+Kameari - buy at [http://www.datsun1200.asia/category/select/pid/8782 Brojects]
 +<br>{{Album|21685}} {{Album|21684}} {{UploadPost|174_5b2aa73a86c00.jpg|488652}} {{UploadPost|174_5b2aa5296d0ad.jpg|488651}} {{UploadPost|174_5b2aa547291a6.jpg|488651}} {{UploadPost|174_5b2aa5549e9ca.jpg|488651}} {{UploadPost|174_5b2aa56ba5299.jpg|488651}} {{UploadPost|174_5b2aa61f912ba.jpg|488651}} {{UploadPost|174_5b2aa62ba77a9.jpg|488651}}
 += Gear Drive =
 +Touring Sedan (TS) style
 +<br>{{Album|25686}} {{Album|8324}}
[[Category:Engine Mechanical]] [[Category:Engine Mechanical]]
-[[Category:Valvetrain]]+[[Category:Valvetrain]]{{End}}

Current revision

The Timing Chain drives the Camshaft. The cam pulley is twice as big as the crank pulley, so the cam runs at exactly 1/2 the speed of the crankshaft.

Also see: 
* Timing Cover
* Crankshaft Pulley

Contents

Overview

We have seen a couple of single link timing chains on A12, which is the original A10 single row chain. Insist on the factory specified double-chain, like Nissan did for later A10s.

super-strong Double-Roller chain is standard
8966.jpgAlbum 8966

NOT GOOD - early A10 single-row chain
A10_timing_chain.jpg 24938.jpgAlbum 24938 24939.jpgAlbum 24939

NOTE: A rattle can be the trait of a stretched timing chain. Pinging/pinking has also often been mistaken for timing chain rattle

A-series engine has a short timing chain -- and with an automatic adjuster -- it rarely stretches or goes bad.
24803.jpgAlbum 24803

Compare to the loooooong chaing used in the Nissan KA24E engine:
TS10930.jpg
KA24 often has timing chain problems

Checking For Wear

The timing chain can be directly check when the Timing Cover is off. It can also be indirectly checked for wear even if the engine is all sealed up.

Covered

To check the timing chain, remove the distributor cap, and turn the engine by hand clockwise. Then mark the rotor position. Finally turn the engine back anti-clockwise until the rotor just moves. How much did the engine turn before the rotor did?

* A little -- timing chain is OK
* considerable -- chain is worn

Cover Off

If tensioner spindle projection is more than 15mm, replace chain. Rotate the engine clockwise a bit, then check the distance.

24796.jpgAlbum 24796

This ones looks to be at the limit:
25111-.jpgAlbum click to view

Replacement

14385.jpgAlbum 14385

Alignment

Check the cam gear alignment. It should be exactly like this:
174_4ee9b6405e4fc.jpgUpload click to view

If it is not lined up, see Camshaft_replacement#Timing.

Do not attempt to match up the bright/marked links on the chain. That only works the first time, as soon as you rotate the engine the links will no longer match (even though it is still in time)

Timing here is one tooth off (notice the key on bottom pulley)
PICT0428a.jpg

Slinger

Don't forget the oil slinger.

12302-18000 THROWER-OIL CRANKSHAFT

21479.jpgAlbum 21479

Part Numbers

Kit

The timing chain kit (timing set) includes: Cam, Crank, Chain, Tensioner

KIT SET
CLOYES Part # 94054S RockAuto.com $35.79
9-4054S.jpg
CLEVITE/PERFECT CIRCLE Part # 92602
ITM 05390500 RockAuto.com $32
053-90500.jpg
STC SHIMIZU
Timing Kit NIS-A14 (includes sprockets)
Timing Chain Kit CK-NIS-A14 (no sprockets)
14366.jpgAlbum 14366

Cam Sprocket

38 tooth Cam Gear (timing gear)
* Sealed Power 223478 $3.50
* ITM 50022 $4.67
* ITM 50021 $4.67
* CLOYES Part # S47 RockAuto.com $9.41
  S478.jpg
* Beck/Arnley 0250282 $10.85
  0250282.jpg

Cam Sprocket Bolt

Special bolt 13082

13082-18000.jpg

Chain

Same as SRL311 with U20 engine (for Jackshaft)

CHAIN RockAuto.com
* CLOYES Part # S478 $9.40
* CLOYES 94054 $9.70
  94054.jpg
* BECK/ARNLEY Part # 0240226
  0240226.jpg
* ITM 2354 $7
specs
Links: 54
Pitch: 3/8 inch
Rollers: Double
Timing Marks: 2

Crank Gear Key

Same key is used for the engine crankshaft pulley.

12316-30000 KEY-WOODRUF 5X16 2

Tensioner

* CLOYES Part # 95005 RockAuto.com $3.90
  95005-1.jpg 95005-2.jpg
* ITM 60004 $6.37
  60004.jpg
Early non-return tensioner (A10 engine)
* 13070-18010 ASS'Y-TENSIONER, non-return B10 [double-chain]
  13070-18010.jpg

Early A12 engines (to April 1970) also used a tensioner on the Tension side of the chain. Apparently this was deemed unnecessary so was omitted starting May 1970.

13083-18001 TENSIONER-CHAIN TENSION SIDE -0470
13084-18000 SUPPORT-TENSIONER TENSION SIDE -0470
08110-62010 BOLT M6 FIXING TENSIONER -0470
13083-18001.jpg

Crank Sprocket

19 tooth Crankshaft Gear (Timing Crank Sprocket, Timing Crank Gear)
RockAuto.com
* CLOYES Part # S477 $8.87
  S477.jpg
* Sealed Power 223477 $6.17
* Beck/Arnley 0250258 $7.36
  0250258.jpg

Adjustable Cam Gear

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.

ps13kai_0399-img600x450-1335611934sqhy0p82792.jpg ps13kai_0399-img600x450-1335611934g5pec482792.jpg

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

fine-tuning the cam (Timing the camshaft)
3639.jpgAlbum 3639 3640.jpgAlbum 3640

Datsun100ATurbo homemade camshaft pulley
2980.jpgAlbum 2980

Pitroad
682.jpgAlbum 682 174_5b2aac25d538b.jpgPost 488654

Tomei
3639.jpgAlbum 3639 3640.jpgAlbum 3640 174_5b2aaa833efea.jpgPost 488653 174_5b2aaa8bd739b.jpgPost 488653

Rollmaster
7339.jpgAlbum 7339 697.jpgAlbum 697

Kameari - buy at Brojects
21685.jpgAlbum 21685 21684.jpgAlbum 21684 174_5b2aa73a86c00.jpgPost 488652 174_5b2aa5296d0ad.jpgPost 488651 174_5b2aa547291a6.jpgPost 488651 174_5b2aa5549e9ca.jpgPost 488651 174_5b2aa56ba5299.jpgPost 488651 174_5b2aa61f912ba.jpgPost 488651 174_5b2aa62ba77a9.jpgPost 488651

Gear Drive

Touring Sedan (TS) style
25686.jpgAlbum 25686 8324.jpgAlbum 8324 

¤