User Login    
 + Register
  • Main navigation
Login
Username:

Password:


Lost Password?

Register now!
Fast Search
Slow Search
Google Ad


[Datsun 1200 encyclopedia]

Timing Chain

(Difference between revisions)

Datsun 1200 encyclopedia | Recent changes | Switch to MediaWiki mode

Printable version | Disclaimers | Privacy policy | Current revision
Categories: Engine Mechanical | Valvetrain

Revision as of 03:03, 22 October 2015
ddgonzal (Talk | contribs)
(->Slinger)
<- Previous diff
Revision as of 00:40, 21 November 2015
ddgonzal (Talk | contribs)
(->Replacement)
Next diff ->
Line 20: Line 20:
<br><img size=240>http://www.clutchkitcenter.com/media/images/TSET/TS10930/TS10930.jpg</img> <br><img size=240>http://www.clutchkitcenter.com/media/images/TSET/TS10930/TS10930.jpg</img>
<br>KA24 often has timing chain problems <br>KA24 often has timing chain problems
 +
 += Checking For Wear =
 +If tensioner spindle projection is more than 15mm, replace chain.
 +
 +<img size=400>http://datsun1200.com/modules/myalbum/photos/24796.jpg</img> [http://datsun1200.com/modules/myalbum/photo.php?lid=24796 album]
= Replacement = = Replacement =
-[http://datsun1200.com/modules/myalbum/photo.php?lid=14385 http://datsun1200.com/modules/myalbum/photos/thumbs/14385.jpg] +<img size=400>http://datsun1200.com/modules/myalbum/photos/14385.jpg</img> [http://datsun1200.com/modules/myalbum/photo.php?lid=14385 album]
== Alignment == == Alignment ==

Revision as of 00:40, 21 November 2015

The Timing Chain drives the Camshaft.

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.

NOT GOOD - early A10 single-row chain
th_A10_timing_chain.jpg 24938.jpg 24939.jpg

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.jpg

Compare to the loooooong chaing used in the Nissan KA24E engine:
click

KA24 often has timing chain problems

Checking For Wear

If tensioner spindle projection is more than 15mm, replace chain.

album

Replacement

album

Alignment

Check the cam gear alignment. It should be exactly like this:

174_4ee9b6405e4fc.jpg

If it is not, see Camshaft#Timing.


697.jpg

3639.jpg 3640.jpg

7339.jpg 7340.jpg


14366.jpg

Slinger

Don't forget the oil slinger.

12302-18000 THROWER-OIL CRANKSHAFT

album

Part Numbers

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

KIT SET
* CLOYES Part # 94054S RockAuto.com $35.79
  th_9-4054S.jpg
* CLEVITE/PERFECT CIRCLE Part # 92602
* ITM 05390500 RockAuto.com $32
  th_053-90500.jpg

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
  th_S478.jpg
* Beck/Arnley 0250282 $10.85
  th_0250282.jpg

Cam Sprocket Bolt

Special bolt 13082

full

Chain

Same as SRL311 with U20 engine (for Jackshaft)

CHAIN RockAuto.com
* CLOYES Part # S478 $9.40
* CLOYES 94054 $9.70
  th_94054.jpg
* BECK/ARNLEY Part # 0240226
th_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. See Crank Pulley Parts.

Tensioner

* CLOYES Part # 95005 RockAuto.com $3.90
th_95005-1.jpg th_95005-2.jpg
* ITM 60004 $6.37
  th_60004.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
 full

Crank Sprocket

19 tooth Crankshaft Gear (Timing Crank Sprocket, Timing Crank Gear)
RockAuto.com
* CLOYES Part # S477 $8.87
  th_S477.jpg
* Sealed Power 223477 $6.17
* Beck/Arnley 0250258 $7.36
  th_0250258.jpg

USA

B110 RAW LIST
VALVETRAIN
13024-H8500 SPROCKET-CAMSHAFT
13024-18001 SPROCKET-CAMSHAFT
13082-18000 BOLT-CAMSHAFT SPROCKET
13030-18000 WASHER-CAMSHAFT
08915-2401A WASHER-LOCK
08915-14010 WASHER-LOCK
13028-18001 CHAIN-CAMSHAFT
13070-18001 ASSY-TENSIONER CHAIN
08120-63510 BOLT-FIXING CHAIN TENSIONER
08915-13610 WASHER-LOCK FIXING CHAIN TENSIONER
PISTON, CRANKSHAFT & CONNECTING ROD
13021-H1000 SPROCKET-CRANK A12
12316-30000 KEY-WOODRUF 5X16 2 A12

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.

th_ps13kai_0399-img600x450-1335611934sqhy0p82792.jpg th_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

682.jpg Tomei 3639.jpg 3640.jpg

7339.jpg Rollmaster

Gear Drive

25686.jpg