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Old 15th October 2013, 08:56   #211
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

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Originally Posted by snkjr View Post
I have been following the idling rule for my Duster 85 PS religiously, though I might have missed out on a couple of occasions. I idle before setting the car in motion and I idle before turning the engine off after halting. However, these days I can hear the whir/squeal of the turbo rather distinctly. It's certainly more prominent than it originally was. I can tell it's the turbo whirring as the sounds starts at around 1800-1900 rpm and goes up to 2000-2100 rpm after which it tends to quite down/settle down. Is this something I need to be concerned about? It sure does get me worried, but since this is my first turbo-charged vehicle, I'm not sure whether the whir/squeal (more whir than squeal) is normal and expected or abnormal and unexpected.
It is of course impossible to judge a sound based on a description, but here's my take on it: It is very unlikely there is anything wrong with the turbo. The reason is very simple. If anything goes wrong with a turbo it's usually all or nothing. Either it works, or it fails completely. The bearings are in order or they fail 100%.

If in doubt have a competent mechanic check it out.

Jeroen
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Old 19th December 2013, 16:25   #212
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

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Originally Posted by snkjr View Post
I have been following the idling rule for my Duster 85 PS religiously, though I might have missed out on a couple of occasions. I idle before setting the car in motion and I idle before turning the engine off after halting. However, these days I can hear the whir/squeal of the turbo rather distinctly. It's certainly more prominent than it originally was. I can tell it's the turbo whirring as the sounds starts at around 1800-1900 rpm and goes up to 2000-2100 rpm after which it tends to quite down/settle down. Is this something I need to be concerned about? It sure does get me worried, but since this is my first turbo-charged vehicle, I'm not sure whether the whir/squeal (more whir than squeal) is normal and expected or abnormal and unexpected.
The turbo whistles, rather than whir or squeal. As you become more familiar with your car, you can hear the turbo whistle more distinctly, when the car is new you are busy with other little details about the car to notice the turbo whistle.
As long as you are getting proper response from your car in terms of acceleration, top end and fuel economy you need not worry...
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Old 19th December 2013, 18:54   #213
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

Quote:
Originally Posted by snkjr View Post
However, these days I can hear the whir/squeal of the turbo rather distinctly. It's certainly more prominent than it originally was. I can tell it's the turbo whirring as the sounds starts at around 1800-1900 rpm and goes up to 2000-2100 rpm after which it tends to quite down/settle down. Is this something I need to be concerned about? It sure does get me worried, but since this is my first turbo-charged vehicle, I'm not sure whether the whir/squeal (more whir than squeal) is normal and expected or abnormal and unexpected.
Quote:
Originally Posted by Jeroen View Post
It is of course impossible to judge a sound based on a description, but here's my take on it: It is very unlikely there is anything wrong with the turbo. The reason is very simple. If anything goes wrong with a turbo it's usually all or nothing. Either it works, or it fails completely. The bearings are in order or they fail 100%.
I've faced a similar situation a few months back for my Swift. There was a humming noise that would start around the same time the turbo kicks in for the 3rd gear though there was no difference in the performance of the car otherwise. It turned out to be from one of the wheel bearings which had to be replaced. That's another possibility since the performance is not hindered.
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Old 3rd March 2014, 12:03   #214
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

I have a Ritz VDI and there is no turbo noise. But feel that after being idled up for sometime, the turbo gives a better performance. Have followed this habit of idling my car 1 minute before start and 30 seconds before stopping the engine. One more thing that i have noted is after 1-2 minutes of warming up, if i try to accelrate, there is an engine noise which feels as if there is over strain on the engine. It sounds like "krrrrrrrrrrr". But once it warms up after normal drive for 10-15 mins, the noise is gone. This trend has even been observed in my seniors Innova and Swift Dzire as well. In contrast, if i keep the engine running for 5-10 mins in the morning, this sound is not there and the engine runs smooth from the first gear slot onwards. Does it happen due to turbo lubrication problem or has something to do with engine oil that i use(use mobil 1 fully synthetic oil).

This noise is not there in my Honda city or Chevrolet Spark

Last edited by su1978 : 3rd March 2014 at 12:23. Reason: additions to the post
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Old 23rd March 2014, 18:31   #215
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

Thank you GTO. I was not doing this. At all. Sheer negligence. I did not even read in detail the manual. As I have started to spend time going through the various sections at TBHP.COM, I am learning with each passing day. I have now read through the manual. Thanks again.
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Old 23rd March 2014, 19:27   #216
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

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Originally Posted by su1978 View Post
But once it warms up after normal drive for 10-15 mins, the noise is gone. This trend has even been observed in my seniors Innova and Swift Dzire as well. In contrast, if i keep the engine running for 5-10 mins in the morning, this sound is not there and the engine runs smooth from the first gear slot onwards. Does it happen due to turbo lubrication problem or has something to do with engine oil that i use(use mobil 1 fully synthetic oil).
It happens in almost every diesel car. Nothing to worry.
Engine needs to reach operating temperature for the clatter to reduce and to revv freely.
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Old 25th March 2014, 15:55   #217
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

After reading som every important tips to keep the Turbo in good health, I now feel reluctant to use the Micro Hybrid feature in my XUV.
I am getting around 13kmpl in city.

But, now I am having second thought.
Not sure if the Turbo in XUV is oil cooled or water?
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Old 4th May 2014, 13:49   #218
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Originally Posted by hps View Post
After reading som every important tips to keep the Turbo in good health, I now feel reluctant to use the Micro Hybrid feature in my XUV.

I am getting around 13kmpl in city.



But, now I am having second thought.

Not sure if the Turbo in XUV is oil cooled or water?

I am also confused. Some members are using this feature of micro hybrid but I still prefer to keep this off unless I am fully convinced.
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Old 7th May 2014, 09:48   #219
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

If you drive a BMW in Eco mode, you will notice the engine switching off when you stop at traffic lights, and restarting as soon as you touch the accelerator.
This only happens when you are driving litely, and in such cases the RPM is usually between 1500 and 1650 and the TCU up shifts as early as feasible.
If you drive hard with RPM exceeding 1800 the engine stops after about 20-30 seconds of idle running.

Rahul
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Old 7th May 2014, 10:46   #220
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Thanks for the knowledge guys...
I wasnt doing this on my swift diesel but I'm going to follow it to the letter from now.
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Old 9th May 2014, 08:54   #221
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

I follow the engine idling rule religiously after getting my first diesel car last year. However, I was wondering what happens if the car stops suddenly in stop-go traffic? You would immediately crank the engine again, but would that sudden stop still effect the turbo?
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Old 9th May 2014, 11:19   #222
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

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Originally Posted by Abh1nav View Post
I follow the engine idling rule religiously after getting my first diesel car last year. However, I was wondering what happens if the car stops suddenly in stop-go traffic? You would immediately crank the engine again, but would that sudden stop still effect the turbo?
I am no expert here. But as such I dont think a one-off incident like stopping in traffic is going to affect the turbo. Damage to the turbo happens if the engine is stopped or run regularly without the following the idling rule. There will be once in a while situations, say an emergency, when one might have to run the car or stop without idling too much or totally no idling. And am sure every car would undergo such situations at some point of time. So if the turbo is affected due to this one incident then that would be too bad..... right.

Experts pls comment.

FundaG
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Old 9th May 2014, 12:29   #223
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

sudden stop after highway push can result some oil cocking. In city conditions it would not make problems. Also after engine stops, turbo will be spinning for a few more seconds (ball bearing will run for longer time before stopping). I find its much easier to chill out driving for the last few miles of your journey or approaching town, lunch break and let everything cool rather than use a turbo timer. way faster cooling due to air circulation.
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Old 9th May 2014, 12:42   #224
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

Quote:
Originally Posted by Abh1nav View Post
I follow the engine idling rule religiously after getting my first diesel car last year. However, I was wondering what happens if the car stops suddenly in stop-go traffic? You would immediately crank the engine again, but would that sudden stop still effect the turbo?
Quote:
Originally Posted by fundagenie View Post
I am no expert here. But as such I dont think a one-off incident like stopping in traffic is going to affect the turbo. Damage to the turbo happens if the engine is stopped or run regularly without the following the idling rule.

FundaG
Nothing to worry. In stop and go traffic situation your car is not running at an extraordinary high speed, so a sudden stop should not affect the turbo.
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Old 7th June 2014, 10:40   #225
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Default Re: Why you must practice the "Idling Rule" with Turbo-Charged Cars

95% of people would not read the manual for their cars! rest 4% will be confused after reading it! And the manual probably achives its Intended purpose!

Dont sweat , manufacturers know , not a lot of people are going to Idle their cars every time they need to switch on / off the vehicle.
If writing a few words could save them even 1 warranty rupee /or give them an excuse to deny warranty , they would write all they can. I would!

Turbos in todays era are far ahead already of the time when turbos used Journal bearings and seized up if not brought to operating temp before loading them.
Yours is a Passenger car , not a Military truck , its turbo is hardly loaded enough to cause any angry reactions.

Most passenger cars use garrett gt15 or its indian / chinese copies , and make less than half the power it was designed to support!

Turbos are generally failing in indian market due to foreign particles in lube and dirty intake in longer run a, and due to manufacturing defects in early kms.

It hardly has any impact if you do not Idle everytime , heavyhaul Vehicles where Turbos need to boost right from Idle are under stress right after start , hence the Rule!
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