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Engine Shudders when shutting down

Discussion in 'Engine Compartment' started by srida, Dec 18, 2011.

  1. vIjAy_kHaSa

    vIjAy_kHaSa Esperto

    Messages:
    1,352
    Panchkula
    mestoc never do that again.
    Purpose of letting the car idle for 1 minute is to slow/cool down the turbo if you accelerate again to 3000 rpm before switching off the engine the turbo would still be spooling and supply of engine oil would stop to turbo and that could result in damage to bearings of turbo or engine oil in turbo to coke due to excessive heat
    Last edited: Dec 30, 2011
  2. mescotc

    mescotc Amatore

    Messages:
    242
    Boisar , Tarapur
    Vijay ,

    but all heavy diesel vehicles follow this shutdown technique ,
    also will check that thread on TFI again before concluding

    Atul
  3. Cinju

    Cinju Esperto

    Messages:
    1,333
    Trivandrum
    @ Mescot Vijay is absolutely right . Please refrain from doing this.What you said is true for heavy & earlier engines without the Turbo. For Turbo engines if you do it, you will soon end up in spoiling your turbo. Once the RPm is raised above 1750 RPM the turbo starts to spool again & the oil is again re-circulated in the turbo.

    @Bhai for Chev beat diesel chances are that you will start feeling that shudder after crossing say around 10 k kms. One another reason could be as it is low in CC, the engine weight would also be less & hence it is not felt that much. Let's wait & see
  4. Gurji does that mean MJD shouldn't shudder or the shudder shouldn't be felt ? In my car the shudder rocks the entire vehicle body when shut down.
    Last edited: Dec 30, 2011
  5. Srini

    Srini Regolare

    Messages:
    468
    Chennai
    It should not rock you car at any time. I do not think it happens. Ask the TASS to check your mountings..

    ---------- Post added at 06:27 PM ---------- Previous post was at 06:25 PM ----------

    Pressing the accelelarator hard is done in older gen cars to charge the battery as well for next morning start. Do not do it in the modern cars. Either slow driving - less than 1500 RPM drive for few minutes before switching off the engine or allowing idle for half a minute is fine.
  6. Cinju

    Cinju Esperto

    Messages:
    1,333
    Trivandrum
    @Srida before taking her to TASS, just check with any other punto owners too. We may not understand precisely the depth of the issue if there is any. There is always a shudder with diesel engines (there are some exceptions). But if it is felt too much there could be some issue with engine mounting bush or any similar parts.
  7. gurjinder

    gurjinder Staff Member Janitor

    Messages:
    3,989
    Punjab
    mescotc, Vijay is absolutely right. Plus, why do you wanna make sure the injectors are drained of all fuel? Even if you rev the engine to the moon, those injectors will always have diesel in them, thanks to the injector pump which continually pumps diesel into them , and there is never a situation when these injectors will not have fuel ( unless there is air in the system).

    Srida, rocking the entire body is definitely not normal. That too from a puny 1248cc diesel. If possible, get hold of other 90hp's in Chennai and compare the shudder. Get it checked if it's not normal.

    Cheers.
  8. mescotc

    mescotc Amatore

    Messages:
    242
    Boisar , Tarapur
    @ Vijay , Gurjinder ,

    Thanks for the valued inputs & will always remember both of you daily while switching off the engine.

    Atul
  9. Tarun

    Tarun Amatore

    Messages:
    227
    Bhiwani, Delhi
    hey Srida, it's just my thought but there could be an explanation too.
    your body weight is sumwat less nd while you turn off the engine you are touching either the Door like lying on it .. or may be you are just holding the steering.
    SO when your engine is turned off nd the Shudder thing takes place, your body also absorbs the impact..
    Try relaxing back on the seat without touching anything ..
    just my two cents though,,
    Last edited: Dec 31, 2011

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