Repair Manual MAN-00
190
THAR
CRDe
BS-IV
MAY
2012
/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The methods may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the trained personnel, at the Authorized Service Centre of
Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for penalty/prosecution© 2012 Mahindra & Mahindra Ltd.
Trouble Shooting
Before going into the specifics of the cooling system it is worthwhile to find out under which driving
conditions the complaints is present.
Some of the causes are:
Prolonged /excess idling
Very high ambient temperature
Slow traffic
Traffic jams
High speed
Steep Gradients
To avoid overheating under such conditions it will be worthwhile to:
Idle with the AC off. In case the temperature indicator needle is close to the red band.
Increase the engine idling speed.
Symptom
Causes
Remedial action
Noise
Fan shroud
1.
Fan contacting the
shroud
Water pump
1.
Loose water pump
impeller.
2.
Water pump bearing
worn/ failure.
3.
Loose mounting of pump
Belts
1.
Belt loose
2.
Glazed/stretched fan
belt.
3.
Rough surface on drive
pulley.
4.
Belt alignment
Alternator/Water pump
1.
Alternator bearing
failure
Belt tension mechanism
1.
Idler pulley bearing
failure
2.
Idler mounting bracket
failure.
3.
Tension bolt failure.
Reposition the shroud and inspect
the engine insulators.
Replace the water pump.
Replace water pump.
Tighten mounting bolt
Tighten belt
Replace serpentine belt,
Replace pulley.
Check the belt alignment & rectify.
Replace alternator bearing
Replace idler bearing.
Replace the idler bracket.
Replace the tension bolt.
Coolant loss- boil over
Coolant
1.
Overfilled recovery tank.
2.
Insufficient coolant
additive causing lower
boiling points.
3.
Additive deteriorated
due to aging/
contamination.
4.
Low coolant level.
Reduce the coolant level.
Add the
additive
.
Replace the coolant
Add coolant
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