Daewoo Nubira. Manual - part 152

1C – 42

I

DOHC ENGINE MECHANICAL

DAEWOO V–121 BL4

5.  Remove the oil pump rear cover bolts.
6.  Remove the rear cover.
7.  Clean the oil pump housing and all the oil pump

parts.

8.  Inspect all the oil pump parts for signs of wear. Re-

fer to ”Engine Specifications” in this section. Re-
place the worn oil pump parts.

Notice : Pack the oil pump gear cavity with petroleum jelly
to ensure an oil pump prime, or engine damage could re-
sult.

9.  Coat all the oil pump parts with clean engine oil.

Install the oil pump parts.

10. Apply Loctite

±

 242 to the oil pump rear cover bolts

and install the cover and bolts.

Tighten

Tighten the oil pump rear cover bolts to 6 N

S

m (53 lb–

in).

11.  Install the safety relief valve, the spring, washer

and the bolt.

Tighten

Tighten the safety relief valve bolt to 30 N

S

m (22 lb–ft).

Installation Procedure

1. Apply 

Loctite

±

 242 to the oil pump bolts and room

temperature vulcanizing (RTV) sealant to the new
oil pump gasket.

2.  Install the gasket to the oil pump and install the oil

pump to the engine block with the bolts.

Tighten

Tighten the oil pump bolts to 10 N

S

m (89 lb–in).

DOHC ENGINE MECHANICAL  1C – 43

DAEWOO V–121 BL4

3.  Install a new oil pump–to–crankshaft seal. Coat the

lip of the seal with a thin coat of grease.

4.  Coat the threads of the oil pump/pickup tube and

support bracket bolts with Loctite

±

 242.

5.  Install the oil pump/pickup tube and the bolts.

Tighten

Tighten the oil pump/pick–up tube and support brack-
et bolts to 10 N

S

m (89 lb–in).

6.  Install the oil pan. Refer to ”Oil Pan” in this section.
7.  Connect the oil pressure switch connector.
8.  Install the rear timing belt cover. Refer to ”Rear

Timing Belt Cover” in this section.

9.  Connect the negative battery cable.

1C – 68

I

DOHC ENGINE MECHANICAL

DAEWOO V–121 BL4

UNIT REPAIR

CYLINDER HEAD AND VALVE TRAIN
COMPONENTS

Tools Required

MKM–571–B Gauge
KM–340–0 Cutter Set
KM–340–7 Guide Drift
KM–340–13 Cutters
KM–340–26 Cutters
KM–348 Valve Spring Compressor
KM–653 Adapter
KM–805 Valve Guide Reamer

Disassembly Procedure

1.  Remove the cylinder head with the intake manifold

and the exhaust manifold attached. Refer to ”Cylin-
der Head and Gasket” in this section.

2.  Remove the coolant temperature sensor.
3.  Remove the camshaft position sensor.
4.  Remove the exhaust manifold heat shield bolts.
5.  Remove the exhaust manifold heat shield.
6.  Remove the exhaust manifold retaining nuts in the

sequence shown.

7.  Remove the exhaust manifold.
8.  Remove the exhaust manifold gasket.
9.  Remove the exhaust manifold studs.

10.  Remove the thermostat housing mounting bolts.
11.  Remove the thermostat housing assembly.
12.  Remove the fuel rail assembly. Refer to Section 1F,

Engine Controls (DOHC).

13.  Remove the coolant bypass housing mounting bolts

and the housing.

DOHC ENGINE MECHANICAL  1C – 69

DAEWOO V–121 BL4

14.  Remove the intake manifold retaining nuts and re-

taining bolt in the sequence shown.

15.  Remove the intake manifold.
16.  Remove the intake manifold gasket.
17.  Remove the electronic ignition system (EI System)

ignition coil and EGR mounting bracket bolts.

18.  Remove the EI system ignition coil and EGRmount-

ing bracket and ignition wires.

19.  Remove the intake manifold studs.
20.  Remove the spark plugs.

21.  Remove the camshaft bearing cap bolts gradually

and in the sequence shown for each camshaft cap.

22.  Remove the intake camshaft bearing caps. Main-

tain the correct positions for installation.

23.  Remove the intake camshaft.
24.  Remove the intake valve lash adjusters.
25.  Remove the exhaust camshaft caps. Maintain the

correct positions for installation.

26.  Remove the exhaust camshaft.
27.  Remove the exhaust valve lash adjusters.