Chevrolet Cobalt Service & Repair Manual: Engine Leak Inspection
| A visual inspection must always
be performed to confirm the presence of aftermarket components, potential
collision damage, or areas of concern. |
| Before moving the vehicle inspect
underneath for signs of oil on the ground to aid in identifying the leaks
location. |
| Always clean engine and surrounding
area before starting the inspection. The origination of the leak can be
narrowed down considerably during cleaning. |
| 1. |
Visually inspect engine compartment
and top of engine for signs of leakage. |
| 2. |
Inspect engine oil, if "milky" in color
and consistency, oil has been contaminated by coolant and cooling
system should be pressure tested as outlined in "Cooling System
Leak, Inspection." |
| 3. |
Inspect valve cover and intake manifold
gasket/seals for leakage. |
| 4. |
Inspect head gasket area for leakage. |
| 5. |
Inspect front cover gasket area for
leakage. |
| 6. |
Raise and support vehicle using a suitable
lift. |
| 7. |
Inspect oil pressure/level sensors
for leakage. |
| 8. |
Inspect oil dipstick tube base for
leakage. |
| 9. |
If equipped, inspect oil cooler/lines
for leakage. |
| 10. |
If equipped, inspect turbocharger oil
lines for leakage. |
| 11. |
Inspect oil filter/housing for leakage. |
| 12. |
Inspect oil pan gasket/seal area for
leakage. |
| 13. |
Inspect front pulley/dampener area
for front main seal leakage. |
| 14. |
Inspect transmission/transaxle to engine
area for rear main seal or oil passage plug leakage. |
| 15. |
If no external leaks are present, engine
valve guides may be worn and leaking. |
| 16. |
Once leak has been detected repair
system as required. |
|
Some manufacturer supplied short
block assemblies do not come equipped with crankshaft and dampener. In-block
cam short block assemblies may not include camshaft and timing gear. If
...
Refer to Fig. 1
when performing the following procedure.
1.
Remove the air cleaner assembly.
2.
Support the engine with a hydr ...
See also:
Chevrolet Cobalt Owners Manual. Headlamps
The lever on the left side of the steering column
operates the exterior lamps.
The exterior lamp switch has the following
four positions:
(Headlamps): Turns on the
headlamps, parking
lamps, and taillamps.
(Parking Lamps): Turns on the
parking lamps and
taillamps only.
AUTO (Automatic H ...
Engine Assembly-Short Block R&R
Engine Mount Bracket R&R