CAN got moved during timing chain replacement

LOKIE TWEEKIE

MEMBER
1991 NISSAN TRUCK
2.4L
4 CYL
4WD
MANUAL
164,563 MILES

I was in the process of doing timing chain job and in the process somebody while I was not home come by and roll the cam or something because followed procedures y'all described and I cannot get it to crank up. I had to replace fuse links and replace the rotor button that somebody bus to do the end lip off metal tab. So I know somebody's messed with it when I wasn't around. Can I get the valve rotation sequence to timing the camshaft to the crank in what position should the exhaust valve be on top dead center compression and which mark is top dead center and is there a degrees of before top dead center or after top dead center? One place I read it in one place.

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi,

Here are the directions for removal and replacement of the timing chain. The timing marks and procedures are included in the directions and attached pictures.

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1991 Nissan-Datsun Truck D21 Hardbody 4WD L4-2389cc 2.4L SOHC MFI (KA24E)
Removal and Installation
Vehicle Engine, Cooling and Exhaust Engine Timing Components Timing Chain Service and Repair Procedures Removal and Installation
REMOVAL AND INSTALLATION
*** THIS ARTICLE INCLUDES UPDATES MADE BY TSB 95027, DATED MARCH 22, 1995 ***

CAUTION: After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike piston heads.

Timing Components

pic 1

REMOVAL
1. Disconnect battery terminal.
2. Drain coolant from radiator.
3. Remove radiator shroud and cooling fan.
4. Remove the following belts.
Power steering drive belt.
Compressor drive belt.
Alternator drive belt.
5. Remove all spark plugs.

Setting TDC- Distributor

Pic 2

6. Set No.1 piston at T.D.C. On its compression stroke.
7. Remove the following parts.

External Parts Removal

Pic 3

Power steering pump, idler pulley and power steering pump brackets.
Compressor idler pulley.

Removing Crankshaft Pulley

Pic 4

Crankshaft pulley.

Removing Oil Pump

Pic 5

Oil pump with pump drive spindle.
Rocker cover.
8. Remove oil pan. See: Oil Pan, Engine > Procedures > Removal and Installation

Removing Front Cover

Pic 6

9. Remove front cover.

Timing Parts- Locations

Pic 7

10. Remove the following parts.
Chain tensioner.
Chain guides.
Timing chain and sprocket.
Oil thrower, oil pump drive gear and crankshaft sprocket.

INSPECTION

Timing Chain Component Inspection

pic 8

1. Check for cracks and excessive wear at roller links. Replace If necessary.

INSTALLATION

After removing timing chain, do not rotate crankshaft and camshaft separately because valves will hit piston head.

Front Of Crankshaft

pic 9

1. Install crankshaft sprocket, oil pump drive gear and oil thrower.
Make sure that mating marks of crankshaft sprocket face engine front.
2. Install camshaft sprocket.
3. Confirm that No.1 piston is set at T.D.C. On its compression stroke.
4. Install timing chain.

Fig. 3 Timing Mark Alignment.

Pic 10

Set timing chain by aligning its mating marks with those of crankshaft sprocket and camshaft sprocket.

Tightening Camshaft Sprocket Bolt

pic 11

5. Tighten camshaft sprocket bolt.

Timing Chain Tensioner

pic 12

6. Install chain guide and chain tensioner.

CAUTION: SERVICE INFORMATION

pic 13

If servicing the timing chain or replacing a long block, check to see if it has the steel-backed tension side guide. If not, please replace it with the countermeasure guide, including the two bolts listed. Due to the changes made to the guide, new style bolts are required. Refer to TSB 95027.

Applying Sealant To Front Cover

pic 14

7. Apply liquid gasket to front cover.
8. Apply lithium grease to sealing lip of crankshaft oil seal.
9. Install front cover.
Be careful not to damage cylinder head gasket.

Front Cover Oil Seals

pic 15

Do not forget oil seal.
10. Install rubber plug.
11. Install oil pan. See: Oil Pan, Engine > Procedures > Removal and Installation
12. Install oil pump and distributor driving spindle with new gasket in front cover.

Installing Oil Pump

pic 16

a. Assemble oil pump and driving spindle, aligning punchmark on driving spindle with oil hole.

Distributor Driving Spindle

pic 17

b. Make sure that driving spindle is set as shown in image.
13. Install distributor.

Setting TDC- Distributor

pic 18

14. Make sure that No. 1 piston is set at T.D.C. And that distributor rotor is set at No.1 cylinder spark position.

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Let me know if this helps.

Take care,
Joe

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