We replace the gasket under the cylinder head when repairing the engine or if there is a passage of gases or cooling liquid through the gasket
To do the job, you need tools: socket heads for 10, 16, 18, Torx E14, a key for 13, screwdrivers, a retainer for setting the TDC, a camshaft retainer, a torque wrench, pliers.
We prepare the car for the task.
We relieve the pressure in the fuel system (described in the article "Replacing the additional Renault Duster fuel filter")
Disconnect the negative battery terminal
We drain the engine coolant (article - Checking and replacing the Renault Duster engine coolant)
We remove the timing belt (article - Checking and replacing the timing belt of a Renault Duster car)
We disconnect the front pipe from the exhaust manifold (article - Removing elements of the Renault Duster exhaust system)
Disconnect the wire blocks:
- from injectors;
- from throttle position sensors, absolute pressure, coolant temperature, intake air temperature, oxygen concentration;
- idle speed controller;
- ignition coils.
Remove the air filter (Removing and installing the air intake and resonator Renault Duster)
We take out the motor wiring harness from the holders on the engine and take it to the side.
Removing ignition coils (article - Replacing Renault Duster coils and spark plugs)
On the K4M engine, disconnect the cable from the throttle assembly
Remove the cable from the intake pipe receiver bracket and move it aside
Disconnect the adsorber purge hose from the inlet pipe
Disconnect the fuel line from the fuel rail
On the F4R engine, we depress the retainer of the phase regulator valve wire block
Disconnect the block from the phase regulator valve
Disconnect the hose to the vacuum brake booster from the inlet pipe by squeezing the latches of its fastening
We unscrew the seven bolts securing the intake pipe to the cylinder head cover
Removing the receiver
We loosen the clamps of the two hoses, squeezing the bent antennae with pliers, and move the clamps along the hoses.
Disconnect the hoses from the thermostat pipes
Disconnect the hoses from the cylinder head
We unscrew the bolts of the power steering pump and move the pump to the side
Removing the fuel rail cover
Remove the cylinder head cover (article - Removing the cylinder head cover of the Renault Duster engine)
Removing the camshafts
Unscrew the ten cylinder head bolts with a Torx E14 socket head and remove the bolts
The cylinder head bolts must be replaced with new ones.
Cylinder head bolts of different lengths.
When removing, remember the location of the bolts.
Remove the cylinder head (it is better to shoot with two people)
Remove the gasket
Cleaning the surfaces of the head and block
Check the block head for warping.
To do this, put the ruler with an edge on the surface of the head, first in the middle along, then across and diagonally and with a probe measure the gap between the surface of the head and the ruler.
Replace the block head if the gap is more than 0.05 mm.
Install the cylinder head in reverse order.
We remove oil or coolant from the threaded holes for the cylinder head bolts that got there when the block head was removed.
Installing a new gasket.
Replacing the bolts with new ones.
Before screwing in the bolts, lubricate the threads with engine oil.
We tighten the bolts on a cold engine, in the order shown in Figure 17 in two stages:
- - the first stage (preliminary) - tighten the bolts with a torque of 20 Nm;
- - the second stage - turn the bolts at an angle of 240±5˚
The photo shows an example of turning the cylinder head bolt to a certain angle.
Install all parts in reverse order
When installing the receiver, tighten the mounting bolts in the sequence shown in Figure 19 to a torque of 9 Nm.