300tdi tappet noise or not ?

[NOZ]

Hi guys , been away for a while my first post for a year or so but enough about that, here is my question.

I get a ticking sound from the engine around 2000 - 2200rpm which sounds like the engine needs a tappet adjustment (like 1 tappet is loose)

I have had the tappets adjusted at MR Auto but the noise remains, the guys at Mr said some 300tdi's have it and some dont and they are not sure where its is coming from and at $80odd an hour I can afford to let them search for it.

So here I am asking you guys, any ideas ??

engines done 146000kms and the vac pump is ok

[DEFENDERZOOK]

<span style="color:blue">if the tappets were noisy....wouldnt they do it right through the rev range...?</span>

[NOZ]

Its not the tappets but I have had mainly chevy v8s til now nad there taps are noisy all the time but they sort of peak ( get loudest )at a particular rev, So I am not sure if they would stay noisy at all rpms, but as I said I have had the tappets adjusted , so its not that

Thanks though style_emoticons/<#EMO_DIR#>/biggrin.gif

[DEFENDERZOOK]

<span style="color:blue">its a diesel....most of the noise under the bonnet comes from the pump and injectors.....</span>

[NOZ]

pump has been o/hauled and replaced injectors , any other thoughts ?

[Larry]

Send a pm to LRHybrid100, he is very good with Tdi noises! style_emoticons/<#EMO_DIR#>/sad.gif

Larry.

[DEFENDERZOOK]

Originally posted by NOZ
pump has been o/hauled and replaced injectors , any other thoughts ?

<span style="color:green">

none that youd like to hear...all the rest are expensive.....

have you checked the pump timing...?

can you pin point the sound to a partiticular part of the engine....
ie....top front bottom or back...?</span>

[NOZ]

pump timing is fine, hard to pin point the sound, if anything from infront of the driver. Hense I thought vac pump but MR said not

[DEFENDERZOOK]

<span style="color:green">aahhh....you havent revved it while your head was under the bonnet.....


it is almost impossible to tell without hearing it....
i am only guessing.....

is the timing belt tensioner tight?</span>

[DEFENDERZOOK]

<span style="color:green">it may even be just a rattle from anything....bonnet rod, lost tools from last mechanic....etc.</span>

[NOZ]

timing bet tensioner is ok, I have reved it from under the bonnet but I can really hear it with all the extra noises eg: fan, exhaust

[NOZ]

nah its mechanical, I am not sure how the tacho reads but if its a cable driven tacho the sound could be something there , I am plucking things from thin air now style_emoticons/<#EMO_DIR#>/laugh.gif

[DEFENDERZOOK]

<span style="color:red">time for me to get some zzz's.......my brain has switched off and i cant think anymore.....


maybe tomorrow.....</span>

[NOZ]

same here mate, thanks for your thoughts though.

[DEFENDERZOOK]

<span style="color:green">the wife just brought up a cuppa.....

the ol brain may run for a few more minutes yet....</span>

[DEFENDERZOOK]

<span style="color:blue">is this a new sound...or has it always been there....?


have you done anything different to make the noise happen.....?
have you checked for any water in the fuel sedimenter....?</span>

[NOZ]

Its been there since we picked it up in Melbourne it had 130000kms ( we bought it second hand ) So everything we have done hasnt fixed it either.

Done the injector pump
timing belt
Gearbox ( manual )

and a few other less expensive things, but the noise remains

[NOZ]

ok where is the fuel sedimenter and could it make a noise ?

[DEFENDERZOOK]

Originally posted by NOZ
ok where is the fuel sedimenter and could it make a noise ?



<span style="color:green">no it wont make a noise.....if the noise has been there all along why worry about it now.....?</span>

[NOZ]

The noise has always given me the sh**ts and it dooesnt seem right. This is our second 96 Disco and the first one didnt make the noise .

I guess I could leave it, but I would be much happier if I could find it and get rid of it. style_emoticons/<#EMO_DIR#>/smile.gif

[sheff]

I hope its not, but if you have had the timing belt replaced recently it could be the crankshaft pulley has come loose. And that is nasty! :cry:

[NOZ]

Thanks Sheff but its not that, I have actually had the timing gear done twice in the past year ( dont ask me why 8O )

keep the ideas coming guys, please

[DEFENDERZOOK]

<span style="color:green">bring it down so i can have a listen to it......</span>

[NOZ]

Your in Sydney right ? hmm 1000ks for a second opinion

[72pug]

Hi There,
Just another option to add to the ever-growing list............if it's been there all along, it could be down to piston-ring slap.......some new cars have it from very early on, some just develop it later due to out of tolerance bore/ piston clearance.........im not talking huge, this can be MINISCULE! and importantly, if you have no issues with low power, and no unusual oil use, then dont worry too much.

One question though.......what is the viscosity grade of the oil that you use???


thanks,

Wayne.

[Defender200Tdi]

I can add a little here. I had a distinct tapping noise on my 200tdi and it sounded like a very noisey tappett, especially on over-run. I was convinced it was mechanical but I couldn't pinpoint exactly where it was coming from. Ultimately I had to pull the timing cover off again (after replacing the timing belt and having the very carefully installed genuine crankshaft oil seal fail within 2000km :x ), and before removing the new timing belt, I checked it to find it was slightly out. Not a tooth out or anyhting like that, just a slight bit of movement when the 3 bolts on the pump were loosened after the pump was locked into position.

When I reassembled everything I made especially sure that the timing was triple checked, and on re-start the tapping noise was gone, and hasn't returned since.

Secondly, I can also add that a genuine tappett noise irritated me on this engine before the timing belt replacement. Adjusting the tappetts cured it only for a short time, when it would then return. The culprit in this instance was the valve caps which were very worn. They appear to wear slightly unevenly and are free to rotate on the valve stem. This means that you can adjust them up correctly in one position, but they then rotate a little creating excess gap. The only solution is to replace the caps (they only cost about $2 each).


Paul style_emoticons/<#EMO_DIR#>/biggrin.gif

[NOZ]

Valve caps sounds like a good idea, I will look into that one . Thanks

[JohnE]

While everyone is looking for the worst case scenario then working back, I think (my opinion only) wayne may have hit the nail on the head. Mine gets a bit noisy roughly about oil change time, so possibly your oil may not be the right one as he suggests. At least that is cheaper than pulling it apart.

john

[NOZ]

I have it running on Penrite HPR deisel , changes every 10000 ks

Is this a poor oil ?

[JohnM]

How old is your fan/serpentine belt.

From memory, a while ago now, the belt on my 300tdi looked good on visual inspections but at certain revs, just above idle I think, it started making a noise that sounded like a bearing noise.(metal clacking) I took off the belt and turned all pulleys etc, everything was good. Put a new belt on noise was gone. Put the old belt on noise was back.

Cheers
JohnM

[NOZ]

Well thats another noise, but I thought that it was the belt so I will change that.


Thanks JohnM

[JohnE]

Well mate can't complain about the oil, however I too use HPR 15 diesel in mine.
Its too bad there isn't a sound thingy on this, you techno people would probably be able to translate that into english, then you can record and send the sound for everyone to hear.
best of luck finding the cause.

john

[seqfisho]

Originally posted by JohnM
How old is your fan/serpentine belt.

From memory, a while ago now, the belt on my 300tdi looked good on visual inspections but at certain revs, just above idle I think, it started making a noise that sounded like a bearing noise.(metal clacking) I took off the belt and turned all pulleys etc, everything was good. Put a new belt on noise was gone. Put the old belt on noise was back.

Cheers
JohnM

Mine too had a noise that no one, even MR Auto couldn't pin point, it was a clacking metalic noise that was inconsistent at idle and above, I too was thinking tappets etc or worse 8O but as it was still under warranty I took it back to Pacific LR and they replaced the drive belt (serpentine) and the noise dissappeared style_emoticons/<#EMO_DIR#>/laugh.gif
The belt was seperating in the grooves and was only visible once it was removed, the metal reinforcing in the belt was moving against each other in the sections that were seperating causing the noise. style_emoticons/<#EMO_DIR#>/ohmy.gif

Since then not a sound out of the motor, and that is with changing to HPR15 Plus which is a semi snythetic oil :wink:

So I would suggest looking at the drive belt.

[NOZ]

Yes will do, surprised MR didnt replace it already as they are very good .

Thanks for your thoughts

[Shifter]

Strange to relate about "ticking noises", but my 97 Disco 300 TDI is currently inhave what I thought would be a simple service. I noticed a strange ticking noise but put it down to a baggy tappet. Tappet are reported fine, but the noise was comming from the head gasket, no 4 cylinder blowing, but only when cool, as it got hotter the noise reduced. An expensive tick but caught before any line drawing by exhaust gas could take place. Might be worth a look, when you engine is cold?

Anyone know how often fuel injectors should be overhauled, can the be overhauled / service exchanged or do they have to be replaced?

My bus is on about 122,000 k's at present.

Thanks,

Shifter.

[feraldisco]

concur with the suggestion that it may well be the valve caps - which would be a cheap and simple fix. My 200tdi breaks the caps all the time for some reason which results in a noisy ticking sound...