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Old 27th November 2009, 20:58   #1396
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@TSK, it's a weekend. How about solving the mystery by tomorrow evening ?
(yes, pls go for a drive. See if it recurs. If yes, then lets get back to T.A.S.S !)
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Old 27th November 2009, 21:06   #1397
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Congrats on getting a new head for your white elephant. How about a party?

Jokes Apart, Tanveer, I think TATA has done enough R & D on your white elephant. You should ask them for a new engine. 31,000 KMS and yet they are unable diagnose the problem.
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Old 27th November 2009, 21:50   #1398
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congrats tsk,i hope your problem will come to an end after this replacement.
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Old 27th November 2009, 22:15   #1399
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Quote:
Originally Posted by condor View Post
@TSK, it's a weekend. How about solving the mystery by tomorrow evening ?
(yes, pls go for a drive. See if it recurs. If yes, then lets get back to T.A.S.S !)
Of course I am going for a drive. However this one will be short, only 600kms or so. But that should be enough to tell if the problem is there or not

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Originally Posted by Sarvodaya View Post
Congrats on getting a new head for your white elephant. How about a party?

Jokes Apart, Tanveer, I think TATA has done enough R & D on your white elephant. You should ask them for a new engine. 31,000 KMS and yet they are unable diagnose the problem.
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congrats tsk,i hope your problem will come to an end after this replacement.
Even I hope this problem is gone forever!
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Old 27th November 2009, 23:36   #1400
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Originally Posted by tsk1979 View Post
Of course I am going for a drive. However this one will be short, only 600kms or so. But that should be enough to tell if the problem is there or not
So is it to the hills? Are we to expect another splendid travelogue?
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Old 28th November 2009, 01:56   #1401
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So is it to the hills? Are we to expect another splendid travelogue?
Just kidding, it will be a long drive around town, probably a couple of clicks. Want to get some running in on the new head actually.
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Old 28th November 2009, 17:45   #1402
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+1.

In a modern car, I read somewhere, engine alone has about 500 components. Add fuel system, intake, egr, ecus, battery, instruments... the list of variables will easily be in 1000s. Now, replacing one part at a time will take 1000 changes. One change a day makes it almost 3 years to cycle all variables. That is only a layman formula. If you add all possible permutations the days would be boundless. TASS is being smart, at least they are changing bunch of things together- saves time, you see.
Injector/rail job will take 30 mts at the most even if they do it afterwards, so logically first replace the head and see if it sorts the issue. Otherwise for a like me it will look like a known but unsolvable injector issue, Tata is still scratching its heads for and buying time by replacing it AGAIN

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She is fine now. but I am wondering. If after 500kms the problem resurfaces, and the second cylinder shows compression loss.... Will they get the bottom part of the engine from Tata or get a whole new engine?
Jokes apart, we too wish this is the last of such issues and you and the elephant roam more mountains without surge-vurge. All the best!
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Old 29th November 2009, 07:24   #1403
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Congrats on the new engine head. Wish you many happy miles with it.
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Old 30th November 2009, 10:35   #1404
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Approx 200kms done after head change, and the problem has resurfaced. On cold start the rpm needle does the oscillations.
Its not as much as it was before, but I suspect it will keep getting worse as more mileage is piled on.
Lets see what needs replacement now!
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Old 30th November 2009, 10:56   #1405
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Commiserations ... tsk tsk tsk

;-)

Dump the elephant and get a prancing horse!
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Old 30th November 2009, 10:57   #1406
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Originally Posted by tsk1979 View Post
Approx 200kms done after head change, and the problem has resurfaced. On cold start the rpm needle does the oscillations.
Its not as much as it was before, but I suspect it will keep getting worse as more mileage is piled on.
Lets see what needs replacement now!
Tanveer, I think the root cause erratic idling apart from the head also lies with some other component.
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Old 30th November 2009, 11:01   #1407
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Originally Posted by sudev View Post
Commiserations ... tsk tsk tsk

;-)

Dump the elephant and get a prancing horse!
But the prancing horse cannot make own roads.. and is very expensive!
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Tanveer, I think the root cause erratic idling apart from the head also lies with some other component.
Since the second cylinder whos showing 20 Bar pressure in compression test(instead of 24-25 other safari's show), its possible that the leak is also there from the cylinder end?

From what I could gather from my conversation with the engineer, now they have to involve plant as engine replacement has a much more stringent check than the head replacement.
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Old 30th November 2009, 11:06   #1408
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But the prancing horse cannot make own roads.. and is very expensive!

Since the second cylinder whos showing 20 Bar pressure in compression test(instead of 24-25 other safari's show), its possible that the leak is also there from the cylinder end?

From what I could gather from my conversation with the engineer, now they have to involve plant as engine replacement has a much more stringent check than the head replacement.
So does that mean when the head is replaced, all the components like valves etc aren't replaced ?

Pics would be BIG +
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Old 30th November 2009, 11:08   #1409
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When head is replaced, valves etc,. are also replaced. I am talking about the engine block, i.e. cylinder, pistons etc.,
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Old 30th November 2009, 11:37   #1410
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I would suggest that you ask TML to replace the whole engine including turbo. Erractic idling can also be caused due to the fuel pump or fuel supply.

BTW have the guys checked your throttle sensor as it can also be the culprit providing dubious signal to the ECU
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