[SPIKE ARRESTOR]

Originally Posted by SS-Traveller

Hubs lock and unlock okay. No noise when in 2WD with hubs unlocked, but noise persists even in 2WD when hubs remain locked.

Didn't get you, your hubs are locked even in 2WD? That means disengagement is not proper?

Spike

[SS-Traveller]

Originally Posted by SPIKE ARRESTOR

Didn't get you, your hubs are locked even in 2WD? That means disengagement is not proper?

Nope, they engage and disengage fine. It's just the whining/squealing noise. Otherwise hubs work fine. And the noise comes from BOTH hubs. And only when they are engaged. If I reverse and disengage, the noise disappears. Something like a mild continuous brake squeal. What can make such a noise??

[ramkya1]

Dear Friends,

Ahmedabad has turned cold, yesterday night around 10 and dropping fast. Today morning turned the heater knob to the right, to Red, but was not enough to heat
the cabin? During my Ladakh run, I remember the very same heater was pretty HOT.

A few basic questions:

1. Has my heater packed up or the efficiency has gone down?
2. How does the heater in a Scorp work? Does it have a heating coil?
3. What is the best way to use the heater, with the A/C on or without it?

Thanks in advance for your inputs.

--Ramky

[SS-Traveller]

^^ Does WOLT have a mechanical switch to change over between fresh air & recirculate mode, or is it an electric switch like the newer Scorpios? Maybe you're in "fresh air" mode?

The heater runs off a cabin radiator - it takes the heat from the coolant, not from an electric heating coil.

Heater + AC Low is what I find most convenient - else the windscreen tends to fog up after some time.

[ramkya1]

Hai,

Thanks for the response. Mine has a electric switch, its in recirculation mode. Heater + Low AC is what we used in the Ladakh Run, cabin was comfortable within 5 minutes of start up. Wonder what went wrong, isn't heating up properly.

=====

Originally Posted by SS-Traveller

^^ Does WOLT have a mechanical switch to change over between fresh air & recirculate mode, or is it an electric switch like the newer Scorpios? Maybe you're in "fresh air" mode?

The heater runs off a cabin radiator - it takes the heat from the coolant, not from an electric heating coil.

Heater + AC Low is what I find most convenient - else the windscreen tends to fog up after some time.

[SPIKE ARRESTOR]

Originally Posted by SS-Traveller

Nope, they engage and disengage fine. It's just the whining/squealing noise. Otherwise hubs work fine. And the noise comes from BOTH hubs. And only when they are engaged. If I reverse and disengage, the noise disappears. Something like a mild continuous brake squeal. What can make such a noise??

Whining and squealing noises are different. Have you isolated the noise to be from the ALH? Does the noise increase with increase in speed?

Remember you first have to disengage and then reverse and not the other way.

Spike

[anupmathur]

DocSS, don't worry about the whining noise. Mine had it too in the early days and Sri Durga had told me it was nothing to worry about. Indeed, the noise went away after some use in 4WD mode.
The consolation was that the car was under warranty; so I did not press the matter much!

Ramky, the control knob is probably failing to actuate the mechanical flap to direct the air stream over the heating coil. I've been through this and it takes minutes to have it fixed at the service centre.
You can also try the bi-level air conditioning; it does a great job of keeping the windshield de-fogged and heating the cabin! Chilled air from the windscreen vents and warm air from the footwell and rear vents!

[comfortablynumb]

Originally Posted by comfortablynumb

Hi Folks,

The 3rd free service......

I plan to use Mobil Delvac MX 15W40 instead of "Maximile Crown". My questions about it are:

1. Will the ASC agree to do such an oil change for me in my 3rd free service, where I provide the oil and just use their oil filter & labour?
2. If not, can I buy an oil filter over the counter at the ASC and do the oil change in an independent garage?
3. If neither of the above are possible, then whom in M&M can I write a stinker to about their service policies?

Update on my post above. I had emailed M & M Customer Care with the same query, and the customer care manager in Pune called me to talk about it. He said that the ASC will change the oil for me, and that they had no issues with an oil change before the specified interval was over and also with using Mobil Delvac MX; he was just curious to know why I wanted to do this. When I requested him to summarise our discussion via an email, he was happy to oblige. I've copied an excerpt from his email below:

"This is with reference to our discussion regarding use of other brand engine oil, hereby I confirm you that you can use other brand engine oil but need to take care of below mentioned points.

1. The oil should be of same grade SAE15W40.
2. As mentioned in Owners Manual, you need to replace the engine oil at the interval of 10000 Kms.
3. Take care that the oil used is genuine and it should be confirmed by WM*"

*WM= Works Manager

Cheers,
Vikram

[SS-Traveller]

Originally Posted by ramkya1

Thanks for the response. Mine has a electric switch, its in recirculation mode. Heater + Low AC is what we used in the Ladakh Run, cabin was comfortable within 5 minutes of start up.

3 things come to mind:
(1) The "fresh air" / "recirculate" flap is stuck in "fresh air" mode.
(2) The heater flap is stuck in "closed"/"cold" position.
(3) The thermostatic valve is stuck in open position, and the car takes a long time to reach optimum operating temperature.

Originally Posted by SPIKE ARRESTOR

Whining and squealing noises are different. Have you isolated the noise to be from the ALH? Does the noise increase with increase in speed?

Remember you first have to disengage and then reverse and not the other way.

It's a whining noise - low-intensity banshee-like is the best I can describe it. Increases with increase in speed. Isolated from ALH. It goes away when I disengage 4WD (bring to 2WD mode) and reverse till the click happens. But if I disengage 4WD and do not reverse to release the ALH, the noise continues, increasing with increasing speed.

Originally Posted by anupmathur

DocSS, don't worry about the whining noise. Mine had it too in the early days and Sri Durga had told me it was nothing to worry about. Indeed, the noise went away after some use in 4WD mode.
The consolation was that the car was under warranty; so I did not press the matter much!

My 4WD system gets regularly used at least once in 3 weeks, if not more frequently. This noise was not there when 4WD was used last in the 3rd week of Dec.

Originally Posted by anupmathur

Ramky, the control knob is probably failing to actuate the mechanical flap to direct the air stream over the heating coil. I've been through this and it takes minutes to have it fixed at the service centre.

Most likely cause.

[SPIKE ARRESTOR]

@SS, if the noise disappears when you reverse that means your ALH is working fine. There is a mechanism inside the ALH (detent spring) which comes into play during engagement and disengagement. Most probably, the disengagement was not happening when you shifted from 4H/4L to 2H (torque reversal did not happen).

If the 4wd system is working fine in accordance with the SOP, then no need to worry.

Spike

[ramkya1]

Thanks for the valuable insights, these are live possibilities, will check it out.

Originally Posted by SS-Traveller

3 things come to mind:
(1) The "fresh air" / "recirculate" flap is stuck in "fresh air" mode.
(2) The heater flap is stuck in "closed"/"cold" position.
(3) The thermostatic valve is stuck in open position, and the car takes a long time to reach optimum operating temperature.
.....................Most likely cause.

[SS-Traveller]

Originally Posted by SPIKE ARRESTOR

If the 4wd system is working fine in accordance with the SOP, then no need to worry.

Yes, the 4WD is working fine. But this is a noise that did not exist earlier.

Most probably, the disengagement was not happening when you shifted from 4H/4L to 2H (torque reversal did not happen).

Disengagement on reversing (or engagement when shifting to 4H/4L from 2H) is happening as usual. Only niggle is, when in 4H/4L, the whine is there, increasing with increasing speed. And when I shift back to 2H and do not reverse to disengage ALH, the noise persists still. After reversing a few feet in 2H, the click to disengage ALH happens, and then there is no more noise.

[SPIKE ARRESTOR]

When you shift back to 2H and did not reverse to disengage-> some noise comes; when you reverse ALH unlocks and the noise disappears this means your ALH locking / unlocking is OK. So, is the noise coming only in 4WD mode and not from the ALH, am I missing anything here?

Spike

[anupmathur]

Originally Posted by SS-Traveller

Yes, the 4WD is working fine. But this is a noise that did not exist earlier.
.....

Are you certain? The noise cannot quite be heard with the windows rolled up.

[hondadude]

Originally Posted by scorpio_fan

Dear BHPians,
Recently i did a long drive to kerala in my new scorpio. Here i noticed a vibration at ~1800 RPM. This comes at all gears irrespective of speed. Is this normal?

I think I have the same issue (at around 1600 RPM). The service guys are attributing to a "sensor". I am taking my Scorp this week and will update with more details.