Nissan Sentra (1991-1994) SR20 - Camshaft Replacement
From WikiAutoRepair
  | |
| Also called | Nissan Sunny Nissan Tsuru III Nissan V16 |
|---|---|
| Production | 1991-1994 (to present as Tsuru and Venezuela) |
| Assembly | Smyrna, Tennessee, Cuernavaca, Morelos, México, Japan |
| Body style(s) | 4-door sedan 2-door coupe |
| Platform | Nissan B platform |
| Engine(s) | 1.4 L GA14DE 1.6 L GA16DE 2.0 L SR20DE |
| Transmission(s) | 5-speed manual 4-speed automatic 4-speed manual 3-speed automatic |
| Wheelbase | 95.7 in Tsuru: 2430 mm |
| Length | 170.3 in Tsuru: 4325 mm |
| Width | 65.7 in (1993-94) 65.6 in (1991-92) 53.9 in (coupe & 1991-92 sedan) 54.1 in (1993-94 sedan) Tsuru: 1650 mm |
| Height | 53.0 in Tsuru: 1381 mm |
| Curb weight | couple 2266 lb 4 dr 2288 lb |
| Fuel capacity | 13.2 gallons |
Contents |
[edit] Tools Needed
- 1” open end wrench (it will need to be thin. Might have to shave down)
- 10MM socket
- 12MM socket
- 24 MM socket
- 27 MM socket
- Spark plug socket
- Wooden chain block:
- Torque Wrench
[edit] Supplies Needed
- Zip ties
- Oil
- Oil filter
- RTV
[edit] Instructions
- Remove spark plugs, distributor, spark plug wires, and valve cover. Leave spark plugs attached to distributor so you remember the order. Also mark the distributor housing (around the bolt) so you can reinstall it in the same spot. If you don’t your ignition timing will be off.
- Use a 27MM socket on the crank pulley to turn the engine until it’s at top dead center. The 0 degree mark should be lined up on the crank pulley and the dowel pin will be at 12 o’clock on the exhaust cam. Make sure the parking brake is on and the car is in neutral.
- Zip tie the timing chain to the gear in two places on each gear. Place the chain block between the chain, below the gears. This keeps you from having to remove the tensioner.
- Place the 1” wrench on the end of the camshaft to keep it from rotating. Use the 24MM socket on the cam gear bolt and remove it. Repeat for the other cam. Pull the gears off the cams and let them sit off to the side.
- Remove the cam caps on both cams. Go slowly so you don’t snap the cams. Turn the bolts one half turn each, until they are all removed. When they are all removed you can remove the cams. Make sure to keep the cam caps in order. Also note which way the dowel pins are pointing. You’ll want to install the new ones in the same position.
- Inspect the new cams for burrs and lube generously with assembly lube.
- Place cams in engine with dowel pins in the same orientation as before.
- Reinstall cam caps. Turn each bolt half a turn at a time, starting with the center bolt and working your way out. Final torque will be 6.7 to 8.7 foot pounds for the 10MM bolts, and 13 to 19 foot pounds for the 12MM bolts next to the distributor.
- Install the gears back on the cams. Make sure it is fully seated before installing the bolt. You may need to use the 1” wrench to move the cams around a bit. Torque bolts to 101 to 116 foot pounds. Use the 1” wrench to hold the cams still or you can damage the chain when torqueing.
- Reinstall the valve cover, distributor, and spark plug wires. Use RTV on the half moon areas of the valve cover gasket and around the distributor. Line up the distributor with the marks you made earlier. Verify ignition timing is still 15 degrees if you wish.
- Break in the cams with 10-15 minutes of 1500-2000 rpm operation, and then 50-100 miles of varied rpm below 4000 rpm.
- Change your oil.
