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328i M52... TICK, TICK, TICK, TICK

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(I did post this on e36coupe.com, but no answer so far, so thought I would ask you experienced gentlemen :D http://www.bmwowner.com/forum/viewtopic.php?f=1&t=216826 )

 

Recently my car has developed the famous "Ticking"

The ticking seems more prominent when the car is warm/hot rather from cold start. Performance isn't affected and engine isn't using oil and I see a lot of people talking about the issue, yet no one really definitively saying this is what it is? I immediately thought vanos (just because of experience of having tapity units in my e39 M5 and new seals and bolts cured that), but apparently they are an unlikely culprit? Car has just covered a 100k and wasn't serviced long ago (plenty of lights left, although no idea the grade oil used). So from what I have read on here and other forums it seems it could be 1 of the following;

Vanos
Camshaft sensor
People using thinner oil than recommended?
Manifold gasket (or crack)
Evaporative emission purge valve (Apparently known as the TEV and is located under the MAF.. http://jackassofalltrades.com/ticker.html

 

I've seen people post videos with the noise and can do the same if it will help, would just like to get to it and fix it.

All help very appreciated :mrgreen:

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Where is the ticking coming from? Does the speed of the tick change with engine revs?

You can do a basic test for a blowing manifold by holding a piece of tissue around it with the engine running and seeing if it moves.

Vanos noise would be at the front of the engine, but is unlikely on an M52.

Another cause is one or more noisy injectors.

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Where is the ticking coming from? Does the speed of the tick change with engine revs?

You can do a basic test for a blowing manifold by holding a piece of tissue around it with the engine running and seeing if it moves.

Vanos noise would be at the front of the engine, but is unlikely on an M52.

Another cause is one or more noisy injectors.

 

I'm in work so will need to check tonight when home but from memory, the tick does seem to increase with engine speed.

 

The noise seems more proment on the drivers side (left front of the engine if looking from the front of the car and again I will need to confirm when home)

 

I'll try the tissue test when home.

 

I've heard about clicking injectors. Is that caused by batch firing? I have noticed a drop in MPG (which is apparently a symptom of this) and I've heard a new cam sensor will fix this, but again it's all stuff people have guessed or that I have read.

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I know exactly what you mean, my saloon does this too and has done for over a year. It's also very intermittent, I can drive to the shops and its fine, come out and drive home and it does it. I know it's not cold related for me. I put it down to the LPG system and something related to that.

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noisey tappet thats got a bit blocked up 

 

 

^^ wot he said ^^

 

 

I know exactly what you mean, my saloon does this too and has done for over a year. It's also very intermittent, I can drive to the shops and its fine, come out and drive home and it does it. I know it's not cold related for me. I put it down to the LPG system and something related to that.

 

Yes mines seems to be intermittant too, I will try the cam sesor first as the car can randomly feel slugish up to 3k revs then explode almost and the fuel consumption is dire... If I still have ticking after I've done it, I will investigate the tappets. Cheers gentlemen!

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That could be a lambda sensor faulty, if you have a running issue. You need to get the car plugged in they are clever enough to point you in the right direction e36's. Rather than guessing the problem 

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Nothing showed when it was pluged in, but apparently sensors can be showing okay when they're actually on blink or intermittent? Recently got MOT and at same time done the thermostat as it wasn't getting up to temperature. The indy I used (Owen Ferry BMW/Merc/Porsche/Volvo specialist in Paisley who is outstanding by the way) said it was most certainly a tappet noise, althoughbit wasn't them who plugged it in, I think I will ask them too when I'm in end of the month to get some other bits and bobs done hopefully get some better readings as it was a mate round the corner with a universal all vehicle type diagnostic kit he has with receipt style print out if you know the one I mean...

Although after getting the work done on the thermostart, it seems to have disappeared? I will get some flush in her and some new oil and if the noise returns then it will be open up and see what's what. I still may get the cam sensor done too as my MPG is noticeably worse than before. Thanks again for the advise pal!

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Faulty VANOS tends to sound like a bag of marbles rattling around rather than a constant tick. 

 

There are no "tappets" as such - the M52 has hydraulic lifters in place of traditional tappets. These make up the valve clearance (known as "lash") by using the hydraulic pressure of the lubricating system of the engine instead of a locked cam-action or threaded follower. It's relatively common for the lifters to get blocked up for various reasons, not always due to neglect. Unfortunately, unclogging a blocked hydraulic lifter involves taking the camshafts out, which is a bit of a pain in the arse.

A clogged hydraulic lifter will not show up as a fault code anywhere, on anything, ever.

 

Of course, this could be caused by mere oil starvation. Is your oil level within the limits on the dipstick?

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Faulty VANOS tends to sound like a bag of marbles rattling around rather than a constant tick. 

 

There are no "tappets" as such - the M52 has hydraulic lifters in place of traditional tappets. These make up the valve clearance (known as "lash") by using the hydraulic pressure of the lubricating system of the engine instead of a locked cam-action or threaded follower. It's relatively common for the lifters to get blocked up for various reasons, not always due to neglect. Unfortunately, unclogging a blocked hydraulic lifter involves taking the camshafts out, which is a bit of a pain in the arse.

A clogged hydraulic lifter will not show up as a fault code anywhere, on anything, ever.

 

Of course, this could be caused by mere oil starvation. Is your oil level within the limits on the dipstick?

 

Oil is where it should be, plenty there and the tick does seem to come and go. Camshafts out most certainly would be a pain! I was more plugging it in to see if I have a sensor away as I'm having a seperate issue of poor MPG (noticibly different from what it was)... Like I said I will get some Forte flush in her, hope that helps and some new oil and fingers crossed it does most of the unclogging. I have not drove her much in Jan/Feb at all really..

 

So will get the Oil change done and get back to enjoying driving her hopfully.

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The correct oil grade in these motors makes a Big difference. As I have discovered over the last 7 years of owning 4 different m50/m52 motors and they have all ticked from the lifters at some point

Sent from my HTC Desire X using Tapatalk

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Had this on my corrado vr6. Turned out to be a loose spark plug !

 

 

Yes m3s are prone to that too.

 

Suppose it wont hurt to check the tightness of them before chucking the new oil in..

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I'd pull them out check them then nip them up.

 

Oooaaaft, I admire everyone's mechanical insight and handyness on here... But if I even remotely try something that requires fineness or slight of hand it most likely will end in disaster.... Should probably buy the plugs the now, shouldnt I  <_<

 

hahahahaha 

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Sussed it yet?

 

My car is in the garage having a few jobs including replacement CCV and pipework plus oil flush and change, will see if that helps.

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I've owned loads of m52s and all of them have started to tap at some point.

100% of the time fresh oil sorted it.

I'd personally give it a flush and some decent fresh oil.

I just expect to change oil on m52s more regularly than service intervals indicate. I always thought it was because I was drifting them until I owned a pair of 728s and found they needed it too.

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I've owned loads of m52s and all of them have started to tap at some point.

100% of the time fresh oil sorted it.

I'd personally give it a flush and some decent fresh oil.

I just expect to change oil on m52s more regularly than service intervals indicate. I always thought it was because I was drifting them until I owned a pair of 728s and found they needed it too.

I had an oil change done and then stuck some stuff in there that Alpinaman recommended and it made no difference.

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Sussed it yet?

 

My car is in the garage having a few jobs including replacement CCV and pipework plus oil flush and change, will see if that helps.

 

 

I've owned loads of m52s and all of them have started to tap at some point.

100% of the time fresh oil sorted it.

I'd personally give it a flush and some decent fresh oil.

I just expect to change oil on m52s more regularly than service intervals indicate. I always thought it was because I was drifting them until I owned a pair of 728s and found they needed it too.

 

Sorry I missed this gentlemen... Well strangely mines disappeared'ish after some fresh oil. What I mean is that the tick is extremely faint now as if the oil is now finding it's way to lifters/where it's supposed to? Combined with thermostat change and car now reaching temperature, it's feels much better plus delivers better MPG. If it returns I'll certainly inform!

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If the car has spent ages not getting up to the correct temp due to a faulty thermostat, since replaced, it wont have done the engine or the oil any good turning sludgey and blocking up oil ways, maybe as others have suggested an engine flush and new oil will see you right, has it been running at the correct temp since the thermostat change ie dead on 12 0 ?clock onthe temp gauge 

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Termostat and coolant flushed and replaced about 18 months ago, oil change 9 months ago.

 

Will see what it's like when I get it back this time and grab a video if it happens again.

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