Why are cylinder head bolts tightened to a specific torque?
Cylinder heads must be tightened to specific torque loads. Too much torque can cause bolts to become loaded past their limits when cylinder pressures in the engine rise, resulting in catastrophic failure of the bolts and thus the seal between the cylinder head and the engine block.
Should you lube head bolts before torquing?
Yes, you should lightly oil head bolts when you install them. You don’t want to have the bores full of oil or anything, but lightly lubricate the threads and heads. Torquing a bolt that size dry will give an inaccurate and insufficient torque because of the friction of the bolt head against the head surface.
When installing a cylinder head where does the tightening sequence usually start?
Each bolt tightening procedure always begins in the middle of the engine (between cylinder 2 and cylinder 3 – see example), moving in a spiral or crosswise direction outwards along both sides until the outer bolts on cylinder 1 and cylin- der 4 have been tightened.
Should you lube cylinder head bolts?
you should always lube anything that is going to be torqued or else you won’t get an accurate reading…you want to be measuring the torque without any friction interfering with the reading.
How much torque does a Toyota Camry have?
Torque: 30 N·m (301 kgf·cm, 22 ft·lbf) for bearing cap No. 1 9.0 N·m (92 kgf·cm, 80 in.·lbf) for bearing cap No. 3 16. INSTALL No.2 CAMSHAFT a. Put the camshaft on the cylinder head with the painted mark of the link of chain aligned with the timing mark of the camshaft timing sprocket. b. Raising the camshaft, temporarily tighten the sprocket bolt.
What should timing gear be on Toyota Camry?
NOTICE: Be sure not to turn the camshaft timing gear to the retarded angle side (to the right direction). Check that there is no clearance between the gear’s fringe and the camshaft. Tighten the fringe bolt with the camshaft timing gear fixed.
How to install a camshaft on a Toyota Camry?
INSTALL No.2 CAMSHAFT a. Put the camshaft on the cylinder head with the painted mark of the link of chain aligned with the timing mark of the camshaft timing sprocket. b. Raising the camshaft, temporarily tighten the sprocket bolt. c. Examine the front marks and unmbers of the 5 bearing caps and install them.
Where is timing mark 0 on Toyota Camry?
SET No. 1 CYLINDER TO TDC/COMPRESSION Turn the crankshaft pulley, and align its groove with the timing mark 0 of the timing chain cover. Check that the timing marks of the camshaft timing gear and camshaft timing sprocket are aligned with the timing marks of the bearing cap as shown in the illustration.
https://www.youtube.com/watch?v=8GoQDZztgzs