We replace the camshaft oil seal if there are signs of oil leakage.
Before replacing the stuffing box, you need to check if the crankcase ventilation system is clogged or the system hoses are pinched.
The process for replacing camshaft oil seals on a K4M engine is practically the same as for a K7J or K7M engine.
The only difference is in the way the piston of the first cylinder is set to the TDC position of the compression stroke and that the engine has two camshafts.
Preparing the car for the task
Remove the timing belt (described in the article - Checking and replacing the timing belt of a Renault Sandero)
The belt does not need to be completely removed, it is enough to remove it only from the camshaft toothed pulley.
If a K7J or K7M engine is installed
We loosen the bolt of the camshaft toothed pulley, keeping the pulley from turning, as shown in the photo, with the handles of the pliers inserted into the pulley holes and a wrench or a large screwdriver
Unscrew the bolt from the camshaft hole
Remove the pulley from the camshaft shank
Pry off with a screwdriver, remove the oil seal from the socket of the cylinder head
On the new stuffing box, inspect its working edge.
The edge should be smooth, without dents and rubber sagging.
The stuffing box spring must be intact and unstretched.
Lubricate the working edge with engine oil.
To facilitate pressing, we make a small chamfer with a needle file.
Install the oil seal with the working edge inside the block head socket.
We fill the working edge onto the camshaft (you can use a wooden stick) and press it in until it stops using a suitable mandrel.
You can use a suitable size head or an old oil seal.
We install the camshaft pulley with the protruding part of the hub towards the engine.
The tightening torque of the camshaft pulley bolt is 45 Nm (4.5 kgcm).
After that, install the belt and all the parts in reverse order.
