We remove the camshafts for replacement, as well as when repairing the cylinder head.
We replace the camshafts if the pressure in the lubrication system has dropped due to increased wear of the camshafts and bearing beds in the cylinder head.
When the beds and their covers are worn out, the head is replaced as an assembly, since the beds are made directly in its body.
Remove the cylinder head cover, as described in the article - How to replace the cylinder head cover gasket on a Hyundai Solaris engine
We set the piston of the first cylinder to the TDC of the compression stroke, article - How to set the TDC of the engine of a Hyundai Solaris car
Removing the timing chain, article - How to replace the timing chain of the Hyundai Solaris engine
We unscrew the bolt securing the gear to the camshaft, keeping the shaft from turning
It is only necessary to remove the gear when replacing the camshaft
Removing the gear
In the same way, we unscrew and remove the gear with the phase regulator clutch from the intake camshaft.
If the camshaft is not changed, then the gear does not need to be removed.
We unscrew the bolts securing the camshaft bearing caps according to the order shown in Figure 5, and remove the camshafts.
The bearing caps are marked with their serial numbers.
Be sure to mark them and install them in their places during assembly.
After removing the camshafts, inspect them
The support journals and cams must be well polished, without damage.
On the working surfaces of the necks, nicks, scratches, and aluminum heaping from the bearing seats in the block head are not allowed.
If traces of overheating, deep risks or wear in the form of a cut are found on the working surfaces of the cams, we replace the shafts.
Grinding the camshaft cams to eliminate stepped wear is prohibited, since changing the size of the cam profile will disrupt the valve timing.
When checking radial runout, if runout is found above 0.04 mm or the journals are misaligned, the shaft must be replaced.
We lubricate the beds of the camshafts with engine oil and put the camshafts in them in such a position that none of the cams rests with the high part of its toe on the valve tappet
We install the camshaft bearing caps and tighten their fasteners to a torque of 13.7-14.7 Nm, in the reverse order of turning them out (see Fig. 5).
We tighten the bolts of the front bearing cover with a torque of 18.6-22.6 Nm.
Install the intake camshaft gear and the gear with the phase regulator clutch by tightening their fastening bolts to a torque of 98.1-117.7 Nm
Install all parts in reverse order.
