Mechanics

HEAD VALVES REPLACEMENT

2001 Daewoo Nubira • 4 cylinder FWD Automatic • 96,000 miles

How do I replace intake or exhaust valve on 2001 Daewoo Nubira (4 cylinder)?
Avatar
Peepoop
April 7, 2011.



You need a valve spring compressor to do it

Rasmataz
Apr 7, 2011.
Not helpful at all

Tiny
Peepoop
Apr 7, 2011.
I dont have any diagrams to show you but I can let you know a little. The timing belt has to come off, then you have to pull the head, then you have to press the valve spring in then you can take the retainers off the valve stems so the valves can come out, all the rest I leave up to you. Good luck hope I helped a lttle.

I already have the head pulled off the engine.
I have the valve spring compressor.
The only issue is the valve springs are deep in the head, there is no way to reach the springs, the only thing I see is a deep cylindrical whole (where the valve lifter sits) and the disk that compresses the spring.

Is there a special tool other than the valve compressor that can do this job for me?

Tiny
Peepoop
Apr 7, 2011.
CYLINDER HEAD AND GASKET
If you haven't done such type of work, I suggest you get a repair manual its not simple there's a lot of stuffs involved not only replacing the valves there's other procedures you need to follow

- Tools Required

KM-470-B Angular Torque Gauge
J-28467-B Engine Assembly Lift Support
Removal Procedure

Remove the fuel pump fuse.
Start the engine. After it stalls, crank the engine for 10 seconds to rid the fuel system of fuel pressure.
Disconnect the negative battery cable.
Disconnect the Powertrain Control Module (PCM) /Engine Control Module (ECM) ground terminal.
Drain the engine coolant.
Disconnect the intake air temperature sensor connector.
Disconnect the breather tube from the valve cover.
Disconnect the air intake tube from the throttle body.
Disconnect the electronic ignition system (EI system) ignition coil connector.
Disconnect the pre-converter oxygen sensor connector.
Disconnect the idle air control valve connector.
Disconnect the throttle position sensor connector.
Disconnect the engine coolant temperature sensor connector.
Disconnect the coolant temperature sensor connector
Disconnect the camshaft position sensor.
Remove the air filter housing bolts.
Remove the air filter housing.
Remove the right front wheel.
Remove the right front splash shield.
Install the engine assembly lift support J-28467-B.
Remove the right engine mount bracket and bolts.
Disconnect the upper radiator hose at the thermostat housing.
Remove the serpentine accessory drive belt.
Remove the crankshaft pulley bolts.
Remove the crankshaft pulley.
Remove the front timing belt cover bolts.
Remove the front timing belt cover.
Remove the timing belt.
Disconnect the breather tube at the valve cover.
Remove the spark plug cover bolts.
Remove the spark plug cover.
Disconnect the ignition wires from the spark plugs.
Remove the valve cover nuts.
Remove the valve cover washers.
Remove the valve cover and the valve cover gasket.
Notice: Take extreme care to prevent any scratches, nicks or damage to the camshafts.
While holding the intake camshaft firmly in place, remove the intake camshaft gear bolt.
Remove the intake camshaft gear.
While holding the exhaust camshaft firmly in place, remove the exhaust camshaft gear bolt.
Remove the exhaust camshaft gear.
Remove the timing belt automatic tensioner bolts.
Remove the timing belt automatic tensioner.
Remove the timing belt idler pulley bolt and nut.
Remove the timing belt idler pulleys.
Remove the engine mount bolts.
Remove the engine mount.
Remove the rear timing belt cover bolts.
Remove the rear timing belt cover.
Remove the auxiliary catalytic converter nuts at the exhaust manifold.
Disconnect all of the necessary vacuum hoses.
Disconnect the fuel return line at the fuel pressure regulator.
Disconnect the fuel feed line at the fuel rail.
Remove the generator adjusting bracket retaining bolt and the bracket.
Disconnect the coolant hose at the rear cylinder head and ignition coil exhaust gas recirculation (EGR) bracket.
Disconnect the surge tank coolant hose at the throttle body.
Remove the fuel rail assembly.
Remove the generator-to-intake manifold support bracket bolts at the cylinder head and the intake manifold.
Remove the generator support bracket.
Remove the intake manifold-to-generator strap bracket bolt and loosen the bolt on the generator.
Move the strap clear of the intake manifold.
Remove the evaporative emission canister purge solenoid bracket bolt and move the bracket clear.
Disconnect the throttle cable at the throttle body and the intake manifold.
Loosen all of the cylinder head bolts gradually and in the sequence shown.
Remove the cylinder head bolts.
Remove the cylinder head with the intake manifold and the exhaust manifold attached.

Rasmataz
Apr 7, 2011.
Why did you waste your energy and time writing all this down?
Haven't you read my previous reply?
I've already removed the head and all I need is a method to remove the valves!

I've done countless head gasket replacement and other engine work!
But I've never come across a situation where I had to replace all of the valves and at the same time the valve springs are not exposed (they are deep in the cylinder head underneath the valve lifters)

your long answer doesn't even tackle the issue i'm having!

Tiny
Peepoop
Apr 8, 2011.
We are sorry we were not able to help you this time. We try hard to help everyone we can, especially our donors. Our money back guarantee is unconditional. Your donation has been refunded.

2CarPros Mike
May 10, 2011.
I know this is coming kind of late, but I had the same problem. I just used a C clamp and a 1 inch diameter pvc 180 joint sawed in half. Using the base of the clamp to hold the valve in place I pressed the half pvc joint down onto the top of the spring plate until the clips were accessible. Careful as this jig can be kind of unstable and can pop off with too big a clamp or unsecure positioning. Hope this helps someone!

Tiny
Egoletz
Jun 13, 2012.
Thanks for your input, there are a lot of ways to get things done.

2CarPros Mike
Jun 15, 2012.