How big of a torque wrench do I need to back up a cam Hex?
Check to see that the sprockets are fully seated against the cams before torquing the bolt tight. Always use a 24 m.m. or 15/16” wrench on the cam hex to back up your torque wrench (never use the chain for resistance)! Torque the cam sprocket bolts to 94 to 115 ft-lb.
Where are the bearing caps on a Nissan QR25DE?
Mark the cam bearing caps if not already marked on both the intake and exhaust sides and mark the direction of the caps to the front of the engine. Remove the front bearing cap by first removing the bolts in the front cover and then the top bolts.
Where are the bearing shells installed in a LS engine?
Wipe each bearing shell seating surface in the block or main cap, as well as the back side of each shell, before proceeding. The upper main bearing shells (grooved) must now be installed into the engine block and the lower main bearing shells (solid) into the main caps.
What kind of wrench to use on cam sprocket?
Always use a 24 m.m. or 15/16” wrench on the cam hex to back up your torque wrench (never use the chain for resistance)! Torque the cam sprocket bolts to 94 to 115 ft-lb. Check that your original chain marks still align with the marks on the sprockets and the lobes still point away from the center of the engine.
Where are the bearing caps placed on a camshaft?
When positioned correctly, the camshafts are at the neutral position (no valve load), easing the installation of the camshaft bearing caps (Figure 1). The camshaft bearing caps are identified numerically (1 through 4), intake or exhaust (I or E) and should be installed from the front to the rear of the engine.
Where are the bearing caps on a DOHC engine?
This engine is a dual overhead cam (DOHC) design, utilizing unique right and left castings with four valves per cylinder. The valvetrain uses cam followers with hydraulic valve lifters. The camshaft bearing caps are made of powdered metal. The location and direction of each cap is marked on the side of the cap.
Mark the cam bearing caps if not already marked on both the intake and exhaust sides and mark the direction of the caps to the front of the engine. Remove the front bearing cap by first removing the bolts in the front cover and then the top bolts.
What’s the best way to alignment a camshaft?
Rotate the left camshafts counterclockwise to position the alignment holes approximately 30º before TDC. This places the camshafts in the neutral position (no valve load). For both sets of camshafts, loosen the camshaft bearing caps in the sequence shown in the service manual.
What should torque be on a cam sprocket?
Torque the cam sprocket bolts to 94 to 115 ft-lb. Check that your original chain marks still align with the marks on the sprockets and the lobes still point away from the center of the engine. Remove the tensioner locking wire you in- stalled. Inspect your work carefully.
Where are the torque caps on a 1.8T engine?
These are numbered and from 1-5 on both the intake and exhaust cams and must be fitted as the diagram shoes below. The numbers on the caps must also be always readable from the intake side of the cylinder head ( not upside down ) Want to join the discussion?
Which is the intake cam on a Nissan QR25DE?
The intake cam is the cam that has the dowel pin closest to the #1 lobe (see diagram). The cams should be laying in exactly the same rotational position as the ones you removed (see diagram). 10.Reinstall all of the bearing caps in the marked order and direction except the front cap.
Check to see that the sprockets are fully seated against the cams before torquing the bolt tight. Always use a 24 m.m. or 15/16” wrench on the cam hex to back up your torque wrench (never use the chain for resistance)! Torque the cam sprocket bolts to 94 to 115 ft-lb.
Torque the cam sprocket bolts to 94 to 115 ft-lb. Check that your original chain marks still align with the marks on the sprockets and the lobes still point away from the center of the engine. Remove the tensioner locking wire you in- stalled. Inspect your work carefully.
The intake cam is the cam that has the dowel pin closest to the #1 lobe (see diagram). The cams should be laying in exactly the same rotational position as the ones you removed (see diagram). 10.Reinstall all of the bearing caps in the marked order and direction except the front cap.
Do you know the torque specs of a Nissan Frontier?
It’s not enough to simply know what type of repairs your car needs; even if you know the rod and main bearing torque specs for your Nissan, you still need to make sure you have the right parts. Lucky for you, AutoZone has a great selection of spark plugs and other parts to help make taking care of your Frontier or Xterra easy.