IGNITION TIMING INSPECTION AND ADJUST- MENT

1989-Montero · engine 2'6 · страница 13 из 55 · Открыть оригинал PDF ↗

(5) If not at standard value, refer to following chart for cause
and repair.

Symptom	Cause	Remedy
l The vacuum gauge reading is less than standard value, but the needle is stable.	l Ignition timing is retarded.	l Adjust the ignition timing.
l The vacuum gauge needle swings slowly.	l The gas mixture is excessively rich.	l Check carburetor.
l The vacuum gauge needle drops irregularly.	l The gas mixture is excessively lean.	l Check carburetor.
l The vacuum gauge needle drops intermittently to 4.0 to 21.3 kPa (1.2 to 6.3 in. Hg).	l - Incomplete close contact of intake and exhaust valve seats.	l Check and repair the valve.
l The vacuum gauge needle drops sud- denly from the normal reading to 33.3 kPa (9.8 in.Hg). then returns to normal.	l Malfunction of cylinder head gasket	l Replace cylinder head gasket.

Таблица в оригинале

DRIVE BELTS TENSlON ADJUSTMENT NOSFMBDD
TENSION ADJUSTMENT OF THE ALTERNATOR DRIVE
BELT

Refer to GROUP 0 - Maintenance Service.
DEFLECTION ADJUSTMENT OF POWER STEERING OIL
PUMP DRIVE BELT

Refer to GROUP 19 - Service Adjustment Procedures.
TENSION ADJUSTMENT OF THE AIR CONDITIONER COM-
PRESSOR DRIVE BELT

Refer to GROUP 24 - Service Adjustment Procedures.

NWFIABO

Refer to GROUP 8 - Ignition system.

LASH ADJUSTER CHECK

No9FE4h

If an abnormal noise is heard from the lash adjusters
(tappets), check as follows.

(1) While installed to the cylinder head, press the part where
the rocker arm contacts the lash adjuster at the very top. If
the adjuster is normal, the part pressed will feel very hard.
(2) If it easily moves all the way downward when pressed..
there is a malfunction of the lash adjuster and it should be
replaced with a new one.
(3) If it feels spongy or elastic, probably oil with air mixed in it
has entered the lash adjuster, so follow the steps below:

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