DIAGNOSTIC PROCEDURE
HIGH OIL CONSUMPTION/LEAKAGE DIAGNOSTIC PROCEDURE TABLE
NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [LF]
POSSIBLE CAUSE & DESCRIPTION (COOLING SYSTEM CONCERNS-OVERHEATING)
STEP
INSPECTION
RESULTS
ACTION
1
Remove and shake the
PCV valve.
Does the PCV valve
rattle?
Yes
Go to the next step.
No
Replace the PCV valve.
2
Inspect for the following:
External leakage
Proper dipstick
Proper engine oil
viscosity
Are all items normal?
Yes
Inspect the internal
engine parts such as
valves, valve guides,
valve stem seals, cylinder
head drain passage, and
piston rings.
No
Service if necessary.
Repeat Step 2.
3
Verify test results.
If normal, return to diagnostic index to service any additional
symptoms.
(See
ENGINE SYMPTOM TROUBLESHOOTING [LF]
.)
If malfunction remains, inspect related Service Bulletins and/or
On-line Repair Information and perform repair or diagnosis.
If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic
information is not available, replace the PCM.
(See
PCM REMOVAL/INSTALLATION [LF]
.)
17
COOLING SYSTEM CONCERNS-
OVERHEATING
DESCRIPTION
Engine runs at higher than normal
temperature/overheats.
Improper coolant level
Blown fuses
Coolant leakage
Excessive A/C system pressure
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:10 PM
Page 86
© 2005 Mitchell Repair Information Company, LLC.
