If a leak of engine oil or coolant is detected at the junction of the block head with the cylinder block, remove the head and replace its gasket
A leak can also occur due to warping of the block head due to overheating
If you accidentally overheat the engine, then in no case should you add coolant when the engine is hot. You need to wait until the engine cools down.
You will need; the same tools as for removing the timing belt, camshaft pulley, cylinder head cover, as well as a “13” key, a TORX E14 socket head, a torque wrench, pliers.
Depressurize the supply system.
Disconnect the wire from the negative terminal of the battery.
Drain the engine cooling system.
Remove the timing belt from the camshaft pulley
Disconnect the downpipe from the exhaust manifold
Remove the air filter.
Pressing the latches, disconnect the wiring harness pads from the injectors
from throttle position sensor...
- - absolute pressure sensor
- - coolant temperature sensor...
- - intake air temperature sensor and idle speed controller.
Disconnect the oxygen concentration sensor harness connector, remove the harness from the holder on the engine.
On the side of the engine facing the bulkhead, unscrew the nut that secures the spacer to the intake pipe, unscrew the bolt that secures it to the cylinder block.
And remove the spacer
Remove the engine harness from the holders on the intake pipe at the rear and front.
Unfastening the upper holders of the engine harness in front and behind with a screwdriver
remove the harness from the front holder, remove the harness from the rear holder
Remove the harness from the upper middle holder on the inlet pipe and move it to the side.
Remove the end of the throttle cable from the ball pin of the intermediate lever, remove the cable from the hole in the bracket and put it aside.
Disconnect the canister purge hose from the inlet pipe.
Disconnect the fuel line from the fuel rail.
Disconnect the hose to the vacuum brake booster from the inlet pipe by squeezing the latches of its fastening.
Loosen the clamps of the three hoses, squeezing their bent antennae with pliers, slide the clamps along the hoses and disconnect the hoses from the thermostat nozzles and the cylinder head
Remove the heater hoses from the holders on the bracket
Remove the ground wire mounting bolt and disconnect the wire.
Remove the bolt securing the power steering pump bracket to the block head.
Remove the cylinder head cover.
Loosen the ten cylinder head bolts in this order, finally unscrew the head bolts, remove them and remove the installed washers under the bolts.
Be sure to replace the block head bolts with new ones.
Reuse is not allowed.
Please note that the bolts are of different lengths.
When removing them, remember the location of the bolts and then reinstall them
Remove the cylinder head complete with intake pipe, throttle assembly and exhaust manifold
Removing the cylinder head is more convenient with an assistant, as it is quite heavy
then remove its gasket
Clean the mating surfaces of the head and block.
Check the block head for warping.
To do this, place the ruler with an edge on the surface of the head, first in the middle along, then across, and also along the diagonals and with a feeler gauge, measure the gap between the plane of the head and the ruler.
Replace the cylinder head if the gap exceeds 0.05 mm.
Install the cylinder head in the reverse order of removal, taking into account the following:
- ─ remove oil or coolant from the threaded holes of the cylinder head bolts that got there when removing the head;
- - be sure to install a new head gasket, gasket reuse is not allowed;
- - replace the bolts with new ones;
- - lubricate the bolts with engine oil;
Tighten the bolts on a cold engine in the following order in four steps:
- Step 1 (preliminary settling of the gasket) tighten the bolts to 20 Nm (2 kgf-m), then tighten by 100° ± 6°; Make an exposure of 3 minutes;
- Step 2 - loosen bolts 1 and 2, then tighten them again with a torque of 20 Nm (2 kgf-m) and tighten by an angle of 110° ± 6°;
- Stage 3 - loosen bolts 3, 4, 5 and 6, then re-tighten them to 20 Nm (2 kgf-m) and tighten them by 110° ± 6°;
- Stage 4 - Loosen bolts 7, 8, 9 and 10, then tighten them again to 20 Nm (2 kgf-m) and tighten them by 110° ± 6°.
Install all removed parts and assemblies, except for the cylinder head cover and air filter, in the reverse order of removal.
Adjust the tension of the timing belt and accessory drive belt
Check and adjust valve clearances if necessary.
Install the cylinder head cover
Install the air filter
Refill coolant.