R26 Rattle/tappet type noise

Loose engine cover or plastic trims around the edges

 

Ive got this same noise just had cambelt redone as was suspected it was one of the pulleys but noise is still there could it really only be loose trims?

 

I have same kind of problem on my 250, does yours sound anything like this: http://tobiasfransman.net/RS250_rattling.mp4 ?

 

Loose heat shield? Maybe?

I used to have a tapping noise which I'm guessing is something that has come loose, was more pronounced when I had duff injectors. Still hear it now and then as the revs drop down to idle. After 3 years it still occurs with adverse effects.

 

Does yours only do it at 1500rpm mine only does it at 1500

 

Yes it rattled aroun 1500-2000 rpm. The weird thing is that the rattle noise is now gone.. I guess it could have been a rock or something..

 

i have something similar as you describe, can only hear it as i drive away, sounds more like marbles in it somewhere, had a mechanic also looking at the pulley when did the cam belt but mine was fine. I suspect it's coming from the aircon pump, as mine run dry at some point last year, after i refilled it it was gone for a period, i forget that the noise was gone after the refill!
If there's enough fluid in the pump it keeps everything lubricated.
This is the problem on mine and i know my aircon runs empty slowly need to find the leak though, but for now i prefer spending money on getting the car to stage 2 ;-)

 

I took mine to Nick at Pure Motorsport and he diagnosed it as a noisey cam follower and said its nothing to worry about

 

Best thing to do is get a metal bar such as a long extension bar and touch it on various components then put your ear to the other end. I have a similar noise that sounds like it's coming from the head but when I put a bar on the alternator and put my ear to it it's much more pronounced. See if it's the same on yours.

 

Noisey cam follower

 

Its a big job apparently

 

The knock/misfire is pretty common. Usually means your injectors need cleaning. Mines the same.

If it is a noisy cam follower then no it's not an easy job. Your oil leak looks like it's from the oil separator which can be unbolted and sealed. But the actual cam cover can't come off unless you take the timing belt off. So it's a fairly big job.

 

Yeah unfortunately the cam cover holds the cams in place. As soon as the cam cover comes off you can lift the cams out.

 

I don't think so. Might be worth a search. But you basically unbolt the oil separator which his held on by a few 10mm bolts, clean the oil around the mating faces and use some loctite black silicone or similar around the mating faces and bolt it back down job done. Don't over do it with the silicone so that when it bolts down it squeezes out everywhere.

 

Not sure if mine is the same as everyone else's; but mine is really tappy on startup for a couple of seconds, then (although much quieter) it stays permanently tappy and rises and falls with the revs.
It is audible on idle and most noticable when I have the windows down and I pass parked cars etc. (allowing the sound to echo back).

I had the cambelt done, along with new injectors and plugs etc, not too long ago (at a dealer) so surely I should be able to rule those out?

 

On a side note... is 10W40 the right grade? I'm sure mine has always had 5W40 (or was it 5W30, I definitely remember 5W...) :/

 

5w30, I had the same noise this morning, slight tap noise and the car running a little lumpy, I dropped the oil which had only done about 400 miles and put fresh in, it's quiet as a mouse now and very smooth, oil can loose it's viscosity very quickly and start to get very watery which in turn can seap out of the tappets causing said noise, try an oil change is my advice.

 

Change it for 5w30, I think that'll cure it

 

No, the correct grade is a fully synthetic 5w/40 to RN0700/0710

 

Cool I thought as much (always get serviced at dealer amd they used 5W40 fully synthetic)

Will see if an oil change cures it, fingers crossed.
Now I just need to find out what is causing the 'twang' noise when tapping the brakes at low speed and I won't be convinced that the car is falling apart

 

Just realised my typo, oops, yes 5w40 is the correct grade....I was tired an it was late lol, mines been on this from new 150.000 miles later it's still perfect.

 

Does anyone know how much tappets cost (and if you can buy them individually or you have to buy them in sets) and how much labour is required to fit them?

 

about £350 for non genuine ones(full set) from engine dynamics http://www.engine-dynamics.com/EngineComponents/pid259/cid127/HydraulicLifterSet16.asp
Don't know if ads would be cheaper?
Labour would be quite expensive i imagine, unless you get it done when doing the cambelt

 

Holy hell that's expensive! I checked up on them for my last car, as I thought it might be tappets (it wasn't) and that was only £230 for a 24v V6.
How can they cost that much for 16? Are they made of gold? :/

 

That's nothing, wait till you get the labour bill to remove the old ones and install the new!

 

I know someone who used to run his own garage (but now rents it out) that still has the equipment and ramps etc. that could probably do the labour quite cheap.
How long are we talking, in hours?

 

Be a good idea. We can get a better idea of what it sounds like.