![]() | #61 | |
Senior - BHPian Join Date: Mar 2006 Location: goa
Posts: 1,066
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Actually only oil cooled turbos need this idle business when switches off,if the turbo is oil and water cooled than there is no need for idling after a fast run. Part from the bearing, the other reason for idling is that the oil cools the turbo and switch off the engine when the turbo is hot, the temperature of the internals increase and decompose the oil. Water cooling the turbo reduces the risk of over heating the oil [and turbo] when switched off after the run. A better alternative to using electric oil pump.Than there are ball bearing turbos that do not need idling as well puls have added advantage of spooling quickly . ![]() Last edited by dinar : 18th November 2009 at 21:29. | |
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![]() | #62 |
Senior - BHPian ![]() Join Date: Aug 2009 Location: Solapur (MH-13)
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| ![]() The Owner's Manual of Mahindra Xylo does not Recommend ![]() The Manual justs says "Dont Turn Off the Engine at Higher speeds. Allow the Engine RPM to reduce to Idle Rpm (may be 800-850) and then the Engine can be safely be Turned Off". Could Experts throw Some Light on this? ![]() I dont want to damage the Turbocharger. But am confused since the Car Manufacturer himself is Not Advising to idle the Engine after starting or before stopping the Engine. |
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![]() | #63 | |
BHPian ![]() | ![]() Quote:
Suppose you don't have a water cooled turbo, then will an alternative electric oil pump be better than a turbo timer? | |
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![]() | #64 |
Team-BHP Support ![]() ![]() | ![]() This statement alone is enough. You are advised to, and should, let the turbo spool slow before shutting off. I would definitely idle for a couple of seconds before driving off. And until your engine reaches its optimum temperature level (usually the mark where it stabilizes), don't high revv! |
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![]() | #65 | ||
Senior - BHPian Join Date: Mar 2006 Location: goa
Posts: 1,066
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Quote:
Running two oil pumps will be tricky, cause there has to be a particular flow rate/pressure to be maintain or the turbo bearings will give away. One has to stops oil from cooking and sticking to the bearing to prevent bearing failure. But it could be a interesting project. ![]() | ||
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![]() | #66 |
BHPian ![]() | ![]() Now we just need to find some one's turbo to test it out on ![]() i got a 1.3 NA engine in my car, so im out of the reckoning |
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![]() | #67 |
Team-BHP Support ![]() ![]() | ![]() I usually let engine run for idle for atleast 30 seconds(if not more) before starting off, or before stopping. The trick is simple. When I come to my apartment building, I chug along at idle. The parking etc., is done with no throttle input. This usually gives me atleast of minute of idling. Ditto for morning start. Start engine, wear seatbelts. adjust seats, and drive on idle till the gate, and for some time after the gate also, and then speed up. |
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![]() | #68 | |
BHPian ![]() | ![]() Quote:
![]() Tata Vista QJD manual does specify idling before start/stop of engine. | |
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![]() | #69 | |
Senior - BHPian ![]() Join Date: Aug 2009 Location: Solapur (MH-13)
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Does this mean that M&M is CONFIDENT Enough that the Turbo can Withstand (and does not Damage the Turbo Bearings) Even If the Engine Is Not Idled after Starting and Before Stopping the Engine? M&M has Warned that Before Stopping the Engine allow the Engine Rpm to come at Idle Rpm. Thats it. Hence want to be Cautious. But currently I am not Idling in case of Xylo but Compulsorily on Indigo LS (IDI Engine) and Indigo XL (DiCOR Engine). | |
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![]() | #70 | |
BHPian ![]() | ![]() Quote:
As we all have learned in schools "prevention is BETTER than cure" ![]() Why take a chance ? | |
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![]() | #71 |
Senior - BHPian ![]() | ![]() Hi, How much shorter would be the turbo's life if the idling process is not followed in a car with a turbo charged engine? |
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![]() | #72 |
Team-BHP Support ![]() ![]() | ![]() What have you got to lose? If you want to be on the safe side, let the turbo come to idle rpm before switching the engine off. We have sufficiently commented on how avoiding this practice can indeed lead to premature turbo damage. |
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![]() | #73 |
Senior - BHPian ![]() Join Date: Aug 2009 Location: Solapur (MH-13)
Posts: 1,603
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| ![]() GTO, For Xylo, I Allow the Engine Rpm to come to Idle Rpm (Tacho Indicated) and the Car to Complete Stop before switching the Engine Off. As for Indigo, can I follow this Practice or is it better to idle the Engine for 30 sec after starting & before shutting it off? I use Castrol CRB Turbo SAE 15W40 API CH4 as against the Tata Motors Ltd Recommendation of SAE 15W40 API CF4+. And I Replace the Engine Oil at TML Recommended 7,500kms and 10,000kms for Indigo LS (May 2004, 1,76,000+kms) and Indigo XL Grand DiCOR (May 2007, 90,000kms+), respectively. Last edited by IndigoXLGrandDi : 26th November 2009 at 21:18. Reason: Corrected some missing words. |
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![]() | #74 | |
BHPian ![]() Join Date: Feb 2009 Location: Pune
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but to let the engine idle after you start and before turn off, has a few other advantages as well. turbo is not the only place an oil film needs to be matured, in fact the same logic holds true for main bearings, con rod bearings, piston pin lubrication as well as valve train. it will accelerate the wear for all these components. without oil at correct operating temperatures and in sufficient quantities at all these locations, you are going to lose significant performance PS: the current xylo and bolero VLX engines are similar. you ll see the sticker on the bolero. so you can safely assume the same for the xylo engine too. cheers nitro | |
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![]() | #75 |
Senior - BHPian ![]() | ![]() I always IDLE my car for about 1min before starting off, and then for first 4-5kms till the engine reaches its optimum tempreature, I drove it under 2K RPM. |
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