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Old 3rd October 2019, 18:43   #1
Rsnail
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Default Ticking noise

Hi guys, I have a problem with my 2.0 V6, recently it developed a ticking noise that is heard from the driver's side (LHD car) when sitting inside the car and driving, it's not really so loud and you can only hear it if you're paying enough attention and only happens when slowly accelerating or decelerating between 2000-3000 RPM, and it goes at the same "ratio" with the RPMs (the more RPMs, the faster the ticking noise). It is not the intake manifold, new one was fitted with upgraded VIS motors, so that is to be left out. I know how a bad manifold sounds and that is completely different. I am thinking that ia has to do with the injectors maybe as I've recently replaced the thermostat and they were taken out of the manifold, even though, I fitted them all with new O rings on the rail side, but the middle and the head rings of the injectors that make them sit in the manifold were not replaced and I could easily take the injector out or put them back in or turn them around inside the manifold without much struggle, and maybe that would be the issue? Although none of them is leaking, not even a drop... I am thinking that one of them has packed up and is spraying too much petrol inside the cylinder and maybe there's the issue with the ticking, as ot developed rather shortly after replacing the thermostat.

It is also to be heard when starting the enginge cold, driving for about 1-5 minutes and then coming to a stop and letting the engine idle, in this case, you can hear it a little louder...

It sounds quite like this, but not really that loud:

Ticking

Last edited by Rsnail; 3rd October 2019 at 18:52..
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Old 3rd October 2019, 19:44   #2
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You mention the inlet manifold is OK - however i have had a ticking noise when my exhaust manifold gasket failed (down pipes to exhaust) the ticking noise was caused by spurts of gas leaking through the gasket - new gasket cured it - however the engine sounded a lot more throaty/noisy.

Also ticking may indicate a faulty timing belt - not sure of the set up on the V6 but in the 1.8t the belt is drivers side
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Old 3rd October 2019, 20:56   #3
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Just to eliminate the canister purge valve, disconnect the plug and see if it persists. The purge solenoid valve is mounted on the rh end of the upper inlet manifold as you look at the engine.

The purge valve only clicks in specific circumstances and usually at tickover and is similar to a bad tappet. Your sound seems more rapid but it's worth checking.

TC
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Old 5th October 2019, 09:43   #4
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Quote:
Originally Posted by T-Cut View Post
Just to eliminate the canister purge valve, disconnect the plug and see if it persists. The purge solenoid valve is mounted on the rh end of the upper inlet manifold as you look at the engine.

The purge valve only clicks in specific circumstances and usually at tickover and is similar to a bad tappet. Your sound seems more rapid but it's worth checking.

TC
You might be able to confirm/rule out the purge valve using a listening stick. Put one end in your ear (cover end of stick with thumb) and the other end on the purge valve - the volume of the tick should increase dramatically if it's the valve.
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Old 5th October 2019, 12:28   #5
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You might be able to confirm/rule out the purge valve using a listening stick.

Already eliminated - see last line of Post 7.


tc
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Old 5th October 2019, 18:02   #6
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I closely listened as far as I could reach with my ear towards the idler and the tensioner and the noise really doesn't seem to come from there Although I really hope that it comes indeed from one of those as it is anyways time to replace the belts
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Old 6th October 2019, 09:01   #7
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Already eliminated - see last line of Post 7.


tc
So it is, I missed that.

The reason I suggested it is that my V6 does the ticking thing every now & then, and when it does the noise from the valve becomes very loud indeed (using the stick in the ear trick).
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Old 3rd October 2019, 21:01   #8
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The timing belt on the 2.0 V6 sits at the passenger side on a LHD (European) car like mine, so I quite doubt that this would be the culprit. Just checked my oil level and it is just slightly under minimum, about 2mm under to say so, hmm, interesting, will add up tomorrow and see if it goes away, haven't even thought to check the oil as I've changed it about 1 month ago and measured it after the change and the next day with a cold engine and it was showing right at the middle of the 2 lines on the dipstick, quite interesting that now it shows lower... Hope that topping it up will make the noise go away...

@TC, Will do right away and come with a reply

Last edited by Rsnail; 3rd October 2019 at 21:04..
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Old 3rd October 2019, 21:06   #9
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Quote:
Originally Posted by Rsnail View Post
The timing belt on the 2.0 V6 sits at the passenger side on a LHD (European) car like mine, so I quite doubt that this would be the culprit. Just checked my oil level and it is just slightly under minimum, about 2mm under to say so, hmm, interesting, will add up tomorrow and see if it goes away, haven't even thought to check the oil as I've changed it about 1 month ago and measured it after the change and the next day with a cold engine and it was showing right at the middle of the 2 lines on the dipstick, quite interesting that now it shows lower... Hope that topping it up will make the noise go away...

@TC, Will do right away and come with a reply
I was going to suggest checking the oil level. They can get a little tappety at the top end if oil starved. Hopefully a top up will rectify it
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Old 4th October 2019, 11:12   #10
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I was going to suggest checking the oil level. They can get a little tappety at the top end if oil starved. Hopefully a top up will rectify it
-If an engine becomes---Oil Starved---the first thing it will do is seize up.--
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