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Old 4th July 2005, 18:46   #1
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Default Tappet sound?

guys, the tappets of my car have started making a knocking sound !!! Me puzzled .... pls advise

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Old 4th July 2005, 18:58   #2
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get them set at a mech...prefer to get them set when the engine is cold...a 15 minute job
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Old 4th July 2005, 19:08   #3
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The mech told me that the palio's tappets may b hydraulic and they cant b set !! Is that true ... I was thinking of taking it to the authorised work shop but then I dont hae too much of faith in them ..lol

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Old 4th July 2005, 19:46   #4
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Quote:
Originally Posted by khaadu75
The mech told me that the palio's tappets may b hydraulic and they cant b set !! Is that true ...
Hydraulic bucket tappets usually are self adjusting and hence don't require regular maintainence unlike rocker arm driven tappets. Presuming excessive mileage on your engine, you'd need replacement "shims". Proper clearance will unfortunatly be specified in a service manual or alternatively available on the internet. They require machining and given the wear and tear on the engine and cam lobe would require a preset tolerance (clearance) before installation.
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Old 4th July 2005, 22:02   #5
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oh sorry yes, hydraulic tappets are self adjusting, agree with trueno20v.
you did not mention the car...hence the goof up
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Old 4th July 2005, 22:56   #6
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Its is all the time or only for a couple minutes after cold start?

Possible causes:

Low oil level
Wrong spec oil
tappets are shot
outside temp too cold.
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Old 5th July 2005, 10:38   #7
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In diesel indica they do injector bleeding to cure the problem
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Old 5th July 2005, 10:39   #8
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a slight tappet noise at cold start is normal in cars but if it does not decrease as the car warms up then you are in torouble
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Old 5th July 2005, 11:59   #9
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Coulld be "valve rap" as well. Nothing serious though. Nozzle calibration usually solves that.
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Old 5th July 2005, 12:30   #10
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Khaadu ... did some digging around and came to know that even if the cam belt tensioner is not tight enough it could cause this problem, this is a minor check for you to do. If the cam belt is loose please tighten immediately and hopefully your problem should go.

Palio's are known to have the tappet sound problem when the engine is cold but when the hydraulics are filled with oil the sound should go. It wont if you have low oil levels...

If both the cam belt and the oil is fine then you will have to check the oil pump itself as the last resort before moving to restting the tappets...
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Old 5th July 2005, 13:16   #11
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Quote:
Originally Posted by iceman91
a slight tappet noise at cold start is normal in cars but if it does not decrease as the car warms up then you are in torouble
It seems so as the sound doesnt reduce after running for while either !!

Its is all the time or only for a couple minutes after cold start?

Possible causes:

Low oil level
Wrong spec oil
tappets are shot
outside temp too cold

Either the oil dip stick is showing a wrong reading as according to that the oil level is perfect but the oil light comes on briefly while cornering and the mech says thats due to a faulty oil switch. Wat wud b the right oil spec ?? Also wat do u mean by tappets are shot and how does that happen .?? Outside temp not at all cold ... its delhi and its still summers ..lol

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Old 5th July 2005, 22:57   #12
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Quote:
Originally Posted by khaadu75
Either the oil dip stick is showing a wrong reading as according to that the oil level is perfect but the oil light comes on briefly while cornering and the mech says thats due to a faulty oil switch. Wat wud b the right oil spec ?? Also wat do u mean by tappets are shot and how does that happen
I'm pretty convinced its low oil level.
If the oil light comes on, then its 'dangerously' low. I'm sorry but your mechanic is talking bullcrap. When you corner, the oil sloshes to one side in the pan and the sensor is exposed to air. (sensor should always be in oil). At this time, even the oil pickup tube may not be dipped in oil and you could be getting oil starvation (which is dangerous to the engine. In racing cars they use baffles in the pan to keep it from sloshing. Similar effects can be seen on heavy braking when the nose dives.

Your dipstick is damaged most likely. Make sure the rubber fitting on the dipstick is not fallen off. If that's the case, it will go down lower than it should and therefore indicate a higher oil level. Try a dipstick from a different Palio or drain and refill to the specified amount.

Shot is just slang meaning its damaged. That can happen due to oil starvation. Only one or many could be damaged. Wrong spec means wrong viscosity or just using cheap oil which wont have the detergents.

Last edited by Mpower : 5th July 2005 at 22:58.
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Old 16th June 2011, 18:40   #13
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Default Re: My Experience with Tata Motors Ltd Dealers and Service Centers.

The Works Manager of Sterling Motors, Solapur Nitin Patil, had told me long back that the Common Rail Diesel Engines do not require Tappet Setting. The Tappet Clearance of Common Rail Engine is automatically adjusted. Is it so?


If there is need to adjust the Tappet Clearance of Common Rail Diesel Engine--
1) How can one come to know that the Tappet Clearance needs adjustment?
2) How much time is required to get the Tappet Setting Done?
3) Does the Head needs to be opened for Tappet Setting?
4) Would a Local Garage be able to adjust the Tappet Clearance of a Common Rail Engine?
5) How to identify whether the Tappet Clearance has been adjusted on a particular vehicle?

Last edited by Rehaan : 20th June 2011 at 12:52. Reason: Splitting post on request
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Old 17th June 2011, 21:21   #14
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Default Re: Tappet sound ??

How to locate the cam belt tensioner in Indigo XL Grand Dicor?
Is it a DIY job to check the Tightness of Cam Belt Tensioner? If not, then how much time is required in A$$/Local Garage? How much charges?

How to identify whether its the sound of Tappet?
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Old 6th July 2011, 16:06   #15
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Default Re: Tappet sound ??

Any answers guys?

Twenty Days have been passed without any quotes.
Experts Please answer the questions.
Thanks.
Sorry for quoting my own message.
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