Renault Scenic - Electronics - Alternator replacement advice - 2002 Scenic - Renault Forums :: Independent Renault forum

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post #1 of 11 (permalink) Old 29th January 2006 Thread Starter
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Renault Scenic - Electronics - Alternator replacement advice - 2002 Scenic

Hi All
I have to go and recover my car today. It apparently developed a burning smell yesterday outside my Wifeís friendís house. Her Husband looked under the bonnet and said it was coming from the alternator, which was very vey, hot to the touch. I thought it was developing a noisy bearing, so that'll teach me!
Anyway, I mentioned to a mate that I have to change the alternator and he seems to think Iíll need a special Renault tool to set the auxiliary drive belt tension???
Is this true? The car is a 02 Scenic DCi with air-con. Can I replace the alternator or is there some special tools needed. Any advice greatly received.
Best,
Dave
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Last edited by Taipan; 29th January 2006 at 11:06 AM.
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post #2 of 11 (permalink) Old 29th January 2006 Thread Starter
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UPDATE.

Well I now have the car home and picked up a Haynes manual as well. Reading the Haynes it would appear that I donít need this tensioning tool as mine has air-con. But mine is also different from the one referred to in the Haynes manual? According to the Haynes manual, there is an adjusting plate to move the spring-loaded tensioner. On mine there doesn't appear to be this adjustable tensioner mounting plate?

So I cant see how to release the tension before removing it. Iím reluctant to start undoing stuff in case everything goes ping!!! Hereís a piccie of what my set up looks like. If anyone can tell me how to remove it safely Iíd appreciate it.

Many thanks.
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post #3 of 11 (permalink) Old 29th January 2006
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Hi Tai - Please add your vehicle details to your profile so that it can be seen in any future posts..

I have no idea on the scenic but here's the laguna Method which MAY be similar..

OPERATION - FAULT FINDING

These vehicles are equipped with alternators with
internal ventilation and integral regulator. There is also
a warning light on the instrument panel which has the
following functions:

***8211; the warning light illuminates when the ignition is
switched on,

***8211; the light extinguishes when the engine starts,

***8211; if the warning light illuminates while the engine is
running it shows there is a "charging" fault.

LOOKING FOR FAULTS
The warning light does not illuminate when the
ignition is switched on.

Check:
***8211; that all electrical connections are good;

***8211; whether the bulb is blown (to find out, connect the
circuit to earth; the bulb should illuminate).

The warning light illuminates when the engine is
running.

This indicates a charging fault which could be caused
by:

***8211; the alternator drive belt being broken or the charging
wiring being cut,

***8211; damage inside the alternator (rotor, stator, diodes or
brushes),

***8211; a regulator fault,

***8211; an overvoltage.

The customer complains of a charging fault but the
warning light is operating correctly.

If the regulated voltage is less than 13.5 V, check the
alternator. The fault could be caused by:

***8211; a diode which has been damaged,
***8211; a wire which has been cut,
***8211; charred or worn tracks.

Checking the voltage

Connect a voltmeter across the battery terminals and
read the battery voltage.

Start the engine and increase the engine speed until
the voltmeter needle registers a stable regulated
voltage.

This voltage should be between 13.5 V and 14.8 V.

Switch on as many power consumers as possible; the
regulated voltage should be between 13.5 V and
14.8 V.

Last edited by Laguna II Owner; 27th March 2006 at 02:59 PM.
 
post #4 of 11 (permalink) Old 29th January 2006 Thread Starter
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Hi Mate.
Profile filled in.
Many thanks for the reply. Some nice info there.
Sadly the fitment is different though. I cant see how to release the tension from the tensioner??? I'll just have to start unding thinsg and see what happens! Cover me chaps, i'm going in!
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post #5 of 11 (permalink) Old 29th January 2006
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Before attempting this job. DISCONNECT the BATTERY.

You need to Tension the tensioner spring before removing it.. If you look at the annotated picture below I have indicated the two lugs on the side of the tensioner that are used for that purpose.

Remove the Offside wheel and innner plastic arch liner to help removal and refitting of the accessory belt.

There is a special Renault tool that is used to pull the accessory belt tight, in turn this pulls the tensioner closed and compresses the spring. You could use a bar inserted between the belt and the sump, then use this to force the belt downwards to compress the spring.
Then there is a small plate with two square holes in it at each end that is used to clip over the two lugs to keep the tensioner secure.
You then release the pulling pressure on the belt and remove the tensioner from the vehicle. This will allow you to remove the accessory belt easily.

Remove and replace the alternator. It is secured by 1 16mm Long Nut and bolt at the top.. And a single 13mm bolt at the bottom. Refitting is reverse of removal.

When refitting, you MUST use a NEW accessory belt, Do Not reuse the old one..

Route the new belt over the pulleys, It helps having two people. Then refit the tensioner to the vehicle. The tensioner can slide up and down on the mounting bolts.
To tension correctly you must push the tensioner onto the belt until the slack is taken up. Tighten the securing bolts.

Then again pull on the accessory belt to pull the tensioner spring up, this will release the locking plate allowing it to be removed easily. Then release the accessory belt.

The difficult part I can see is actually getting hold of the tensioner locking plate.. You could buy it from Renault I guess, but at what cost.. I don't know..



The locking tool looks like this


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For as long as but one hundred of us remain alive, we will never on any condition submit to the domination of the English.....It is not for glory, nor riches, nor honours that we fight, but for freedom alone, which no good man gives up except with his life. Arbroath 1320
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Last edited by WebCode; 29th January 2006 at 01:00 PM.
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