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Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Nissan
Satisfied Customers: 12885
Experience:  Have owned a repair shop for 25 yrs.
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Nissan/Datsun Sentra: how do you replace a timing chain set

Resolved Question:

how do you replace a timing chain set on a 1998 nissan sentra
Submitted: 2 years ago.
Category: Nissan
Expert:  Tim's Auto Repair replied 2 years ago.

tims auto repair :

hi

tims auto repair :

this may help you

tims auto repair :

Please ACCEPT my answer by clicking the accept button, so I can get credit for my work.i don't receive commission unless you do ..I'm not always going to be giving you good news,so please don't let this stand in the way of you accepting my answer.it does not cost you more money.we will still be able to communicate.please understand,i can not see,hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated!if you are not satisfied with my answer,please do not leave bad feed back,i will gladly opt out and let another expert handle the question.if i have sent any diagrams,please print them.they will only stay on here for an hour or so...sometimes you may need to right click the image,then save picture as]to save it to your computer so you can open it with your picture program...PLEASE ASK IF YOU NEED MORE HELP

tims auto repair :






















1998 Nissan-Datsun Sentra SE L4-1998cc 2.0L DOHC MFI (SR20DE)
Timing Chain Service and Repair, Procedures: Removal and Inspection










CAUTION:
- After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike piston heads.
- When installing rocker arms, camshafts, chain tensioner, oil seals, or other sliding parts, lubricate contacting surfaces with new engine oil.
- Apply new engine oil to bolt threads and seat surfaces when installing cylinder head, camshaft sprockets, crankshaft pulley, and camshaft brackets.

REMOVAL
1. Release fuel pressure.
2. Remove engine under covers.
3. Remove front RH wheel and engine side cover.
4. Drain coolant by removing cylinder block drain plug and radiator drain cock.
5. Remove radiator.
6. Remove air duct to intake manifold.
7. Remove drive belts and water pump pulley.
8. Remove generator and power steering pump.
9. Disconnect the following parts:
- Vacuum hoses
- Fuel hoses
- Wires
- Harness
- Connectors

10. Remove all spark plugs.








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11. Remove rocker cover bolts in numerical order.
12. Remove rocker cover and oil separator.








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13. Remove intake manifold supports.








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14. Remove oil filter bracket and power steering oil pump bracket.








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15. Set No. 1 piston at TDC of its compression stroke.








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- Rotate crankshaft until mating mark on camshaft sprocket is set at position indicated in figure.








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16. Remove chain tensioner.








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17. Remove distributor. Do not turn rotor with distributor removed.








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18. Remove timing chain guide.








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19. Remove camshaft sprockets.
- For retiming in cylinder head removal, apply paint mark to timing chain matched with mating marks of camshaft sprockets.








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20. Remove oil tubes, baffle plate, camshaft brackets and camshafts.
- Mark these parts original positions for reassembly.








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21. Remove starter motor.
22. Remove the following water hoses:
- Water hose for cylinder block.
- Water hoses for heater.








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23. Remove knock sensor harness connector.
24. Remove EGR tube.








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25. Remove cylinder head outside bolts.








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26. Remove cylinder head bolts in numerical order.
- Removing bolts in incorrect order could result in a warped or cracked cylinder head.
- Loosen cylinder head bolts in two or three steps.

27. Remove cylinder head completely with intake and exhaust manifolds.
28. Remove oil pans.








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29. Remove oil strainer and baffle plate.








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30. Remove crankshaft pulley.








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31. Set a suitable transmission jack under main bearing beam.








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32. Remove RH engine mounting.








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33. Remove front cover and oil pump drive spacer.
- Inspect for oil leakage at front oil seal. Replace seal if oil leak is present.








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34. Remove timing chain guides and timing chain.

INSPECTION








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Check for cracks and excessive wear at roller links. Replace chain if necessary.

tims auto repair :






















1998 Nissan-Datsun Sentra SE L4-1998cc 2.0L DOHC MFI (SR20DE)
Timing Chain Service and Repair, Procedures: Installation

















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1. Install crankshaft sprocket on crankshaft.
- Make sure that mating marks on crankshaft sprocket face front of engine.








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2. Position crankshaft so that No. 1 piston is set at TDC and key way is at 12 o'clock. Fit timing chain on crankshaft sprocket, aligning the mating marks.








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- Mating mark color on timing chain.
(1): Gold
(2), (3): Silver








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3. Install timing chain and timing chain guides.








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4. Use a scraper to remove old liquid gasket from mating surface of front cover.
- Also remove old liquid gasket from mating surface of cylinder block.








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5. Apply a continuous bead of liquid gasket to front cover.
- Use Genuine RTV silicone sealant Part No. 999 MP-A7007, Three Bond TB1207D or equivalent.
- Be sure to install new front oil seal in the right direction.








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6. Install oil pump drive spacer and front cover.








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- Wipe off excessive liquid gasket.








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7. Install RH engine mounting.








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8. Install crankshaft pulley.
9. Set No. 1 piston at TDC of its compression stroke.








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10. Install oil strainer and baffle plate.
11. Install aluminum oil pan.








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12. Before installing cylinder head gasket, apply liquid gasket as shown in the illustration.








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13. Install cylinder head completely with intake and exhaust manifolds.
- Apply engine oil to threads and seating surfaces of cylinder head bolts before installing them.
- Be sure to install washers between bolts and cylinder head.

CAUTION: If cylinder head bolt exceeds limit of dimension "A", replace it.
Dimension "A": 158.2 mm (6.228 inch)








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14. Tighten cylinder head bolts using the following procedure.
a. Tighten all bolts to 39 Nm (4.0 kg-m, 29 ft. lbs.).
b. Tighten all bolts to 78 Nm (8.0 kg-m, 58 ft. lbs.).
c. Loosen all bolts completely.
d. Tighten all bolts to 34 to 44 Nm (3.5 to 4.5 kg-m, 25 to 33 ft. lbs.).








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e. Method A: Turn all bolts 90 to 95 degrees clockwise with Tool or suitable angle wrench.
Method B: If an angle wrench is not available, mark all cylinder head bolts on the side facing engine front. Then, turn each cylinder head bolt 90 to 95° clockwise.
f. Turn all bolts another 90 to 95° clockwise.
g. Ensure that paint mark on each bolt faces the rear of the engine. (Method B only.)
Do not turn any bolt 180 to 190 degrees clockwise all at once.









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15. Install cylinder head outside bolts.
16. Install the following water hoses:
- Water hose for cylinder block.
- Water hoses for heater








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17. Install knock sensor harness connector.








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18. Install starter motor.








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19. Remove old liquid gasket from mating surface of LH camshaft end bracket.
- Also remove old liquid gasket from mating surface of cylinder head.
20. Apply liquid gasket to mating surface of LH camshaft end bracket as shown in illustration.
- Use Genuine RTV silicone sealant Part No. 999 MP-A7007, Three Bond TB1207D or equivalent.








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21. Install camshafts, camshaft brackets, oil tubes, and baffle plate.
- Position camshaft.
- LH camshaft key at about 12 o'clock.
- RH camshaft key at about 12 o'clock.
- Apply new engine oil to bearing and cam surfaces of camshafts before installing them.








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- Position camshaft brackets as shown in the illustration. Apply new engine oil to threads and seating surfaces of camshaft bracket bolts before installing them.








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- Arrange bolts (Size and length).
(A): M6 x 53.8mm (2.12 inch)
(B): M6 x 37 mm (1.46 inch)
(C): M8 x 35 mm (1.38 inch)
(D): M6 x 64 mm (2.52 inch)








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- Tightening procedure
STEP 1:
RH camshaft
Tighten bolts (9) - (10) in that order, then tighten bolts (1) - (8) in numerical order: 2 Nm (0.2 kg-m, 17 inch lbs)
LH camshaft
Tighten bolts (11) - (12) in that order, then tighten bolts (1) - (10) in numerical order: 2 Nm (0.2 kgs.cm, 17 inch lbs)
STEP 2:
Tighten bolts in numerical order: 6 Nm (0.6 kgs.cm, 52 inch lbs)
STEP 3:
Tighten bolts in numerical order.
Bolt type (A), (B), (D): 9.8 - 11.8 Nm (1.0 - 1.2 kg-m, 7.2 - 8.7 ft. lbs.)
Bolt type (C): 18 - 25 Nm (1.8 - 2.6 kgs.cm, 13 - 19 ft. lbs.)









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22. Install camshaft sprockets. Line up mating marks on timing chain with mating marks on camshaft sprockets.








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- Lock camshafts as shown in figure and tighten to specified torque.

137 - 157 Nm (14.0 - 16.0 kg-m, 101 - 116 ft. lbs.)

Apply new engine oil to threads and seating surfaces of camshaft sprocket bolts before installing them.








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23. Install timing chain guide.








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24. Install distributor.
- Make sure that position of camshaft is as shown in figure.








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- Make sure that No. 1 piston is set at TDC and that distributor rotor is set at No. 1 cylinder spark position.








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25. Install chain tensioner. Make sure the camshaft sprockets are tightened completely. Press cam stopper down and "press-in" sleeve until hook can be engaged on pin. When tensioner is bolted in position the hook will release automatically. Make sure arrow "A" points toward engine front.








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26. Install oil filter bracket and power steering oil pump bracket.








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27. Install intake manifold supports.








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28. Remove old liquid gasket from mating surfaces of rocker cover and cylinder head.
29. Apply a continuous bead of liquid gasket to rocker cover gasket and cylinder head as shown in the illustrations.
- Use Genuine RTV silicone sealant Part No. 999 MP-A7007, Three Bond TB1207D or equivalent.








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30. Install rocker cover and oil separator.
- Be sure to install washers between bolts and rocker cover.
- Tightening procedure

STEP 1: Tighten bolts (1) - (10) - (11) - (13) - (8)
STEP 2: Tighten bolts (1) - (13)
8 - 10 Nm (0.8 - 1.0 kgs.cm, 69 - 87 inch lbs)


31. Install the following parts:
- Spark plugs and leads
- Power steering pump
- Generator
- Water pump pulley and drive belts
- Radiator
Refit hoses and refill with coolant.
- Front RH wheel
- Engine under covers

32. Connect the following:
- Vacuum hoses
- Fuel hoses
- Wire harnesses and connectors
- Air duct to intake manifold

tims auto repair :

Please ACCEPT my answer by clicking the accept button, so I can get credit for my work.i don't receive commission unless you do ..I'm not always going to be giving you good news,so please don't let this stand in the way of you accepting my answer.it does not cost you more money.we will still be able to communicate.please understand,i can not see,hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated!if you are not satisfied with my answer,please do not leave bad feed back,i will gladly opt out and let another expert handle the question.if i have sent any diagrams,please print them.they will only stay on here for an hour or so...sometimes you may need to right click the image,then save picture as]to save it to your computer so you can open it with your picture program...PLEASE ASK IF YOU NEED MORE HELP

Tim's Auto Repair, mechanic
Category: Nissan
Satisfied Customers: 12885
Experience: Have owned a repair shop for 25 yrs.
Tim's Auto Repair and 7 other Nissan Specialists are ready to help you

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