Thread: What happened to your Discovery 2 today?

Originally Posted by trout1105

What happened to need a tow?

I’m guessing the alternator. Have dumped the old girl at the mechanic as I have no time this week to play with her.
I must say the RACV were fantastic. Organised the tow back to my home mechanic for no extra cost and my 4yo got to ride in the truck, made his day!!

Originally Posted by Eevo

voltage tested some the charging system. Houston we may have a problem here.
36 degree day.

12.3v on all batteries before engine start

while car warming up
crank 13.75v
2nd 13.6v
3rd 13.5v
scanguage 14.0v


car warm, light bar, high beam, 1 radiator fan on (max power draw without fridge)
crank 13.05v
2nd 12.9v
3rd 12.9v
scanguage 13.4v




car warm, lights n fans off
crank 13.5v
2nd 13.4v
3rd 13.3v
scan guage 13.8v


alternator temp 90 degrees.

alternator voltage output not good enough.


time to replace alternator?

Hi Eevo, while additional info is needed but I’ll take a guess and say those voltages were taken with the engine at idle.

If so, with your batteries at 12.3v when you started your testing, my guess is your batteries are pulling a bit of power while they try to charge and this may be pulling the voltage down a little because the alternator is at it’s lowest current output with the motor at idle.

A low current output and a bit of a current load, means the alternator’s Voltage is being pulled down.

This all points to your voltage readings being fine.

Hope this is of some help.

Originally Posted by drivesafe

Hi Eevo, while additional info is needed but I’ll take a guess and say those voltages were taken with the engine at idle.

If so, with your batteries at 12.3v when you started your testing, my guess is your batteries are pulling a bit of power while they try to charge and this may be pulling the voltage down a little because the alternator is at it’s lowest current output with the motor at idle.

A low current output and a bit of a current load, means the alternator’s Voltage is being pulled down.

This all points to your voltage readings being fine.

Hope this is of some help.

cheers mate.
your correct, all done at idle.

so i should throw the charger on the batteries, make sure their 100% and retest?

Originally Posted by rangieman

Oh i washed and polished mine today in 39 degree heat with some humidity thrown in to hinder the process
Oh there might have been a few beer`s consumed during the process to help

So now your too exhausted to think about fitting that plastic over the bumper corner trim it would look schmicker with it on you know.

Well yesterday started out changing rear pinion seal, so rear diff is now out and not healthy, so couldn't do more to that.
Next fixed the water leak on the head.
Then decided to fix the leaky fuel cooler that someone else had fixed previously oh yay full of silicone.
Then pulled the alternator out to start rebuilding and replace the oil seals.
Now have a semi disassembled disco...

Originally Posted by Eevo

cheers mate.
your correct, all done at idle.

so i should throw the charger on the batteries, make sure their 100% and retest?

The easiest fix is to throttle up the motor to about 1,500 RPM and you do your voltage test while the motor is running at road speed RPMs.

Make sure everything else is turned off while you test the voltage.

Testing this way will show you if your alternator is working properly.

Well it finally came in the post today.
I ordered it in November last year so not to bad as it has to come from the U.K. Still worth the wait I’m so happy I guess it’s just the little in life that you make the most of.

Before and after shot

Put the new silicone turbo hoses on (Thanks Mario)
Next job is to fix the passenger front window - one of the plastic rollers decided to break off.