Replacing Timing Chain Tensioner M62b46

[SlickGT1]

can you rev it a bit? I would have to say that does not sound like chain. Sounds more like missfire, or even vac leak.

[BWK]

I am getting a persistent P2096 code which says it could be a vacuum leak on the engine or a MAF sensor fault or an Air leak near sensor or failed sensor.

As I stated earlier, I have replaced the MAF and the coils, plugs belt tensioner etc.

How would i go about finding a vacuum leak? I will try to get a revved engine video clip. The other weird think is that is intermittent.

It doesn't always do it on startup, nor all the time. I started it today and it was quiet and smooth. I let it warm up in the alley for about 5 mins and came out and it was making the noise so I took the video I posted. It has been running smoothly all day. Some days, it doesn't do it at all and it always subsides after a bit.

You saying that gives me hope as that is the exact error that I am getting.

[BWK]

Would or could a vacuum leak account for the "knocking/ticking type sound in the video?"

[diyanich]

That video sounds like a timing chain noise.
Your engine has 2 tensioners,one on the passenger side and one on top close to water pump.
I would get those replaced and see if noise is reduced,if not..probably your chain guides are failing.
It's pretty common issue with M62 and my X is sitting with guides failed and waiting for spring time,so I can start taking things apart...but yours is N62 and it's a first time I see this happen on this engine,your miles are higher than of my X,so probably you should get some money aside and get ready for a repair.

Originally Posted by BWK

Would or could a vacuum leak account for the "knocking/ticking type sound in the video?"

[BWK]

Thank you both for the input.

I am curious as to what made SlickGT1 think that a vacuum leak could cause my engine to act up. I do have the code for the vacuum leak. It is the only one that is tripping.

If it is the timing chain tensioner, should I be able to have the guides replaced as well without a lot of additional labor?

Also, do timing chains actually stretch or is that a perception because of the tensioner losing strength? I am asking because I think the engine has to practically come out of the car to do the timing chain. If that is the case, I am looking at many dollars and some tough decisions.

Other than that noise, the car is in amazing shape and purrs like a kitten...

[flatlander]

Have you checked the spark plugs to see if any are loose? I've had a loose plug which gave a similar noise before. It's an easy no risk check to do before you buy parts and dive into a chain tensioner replacement.

Originally Posted by BWK

Hello Everyone,

I am a new registered user here.

Thank you for having me.

I am having an issue with my 2005 4.4l E53
I have 191,000 miles. I just received the title, free and clear, in the mail.
I have driven this since 43,000 miles. I have maintained it at the dealership the entire time that I have owned it.

I have just invested in plugs, coils, MAF, pre cat O2 sensors, belt tensioner, belt and pulleys.

I always get any abnormalities checked out, straight away. This one is the most frightening and I have had the most difficult time getting a straight answer for this repair.

I have just encountered this noise in the short clip below:

http://www.youtube.com/watch?v=sCaraT3-QYU

I am hoping that there is some wisdom to be imparted to me, on this site, in regards to this issue.

Again, I am a newbee. If I should post this somewhere else, please advise. I couldn't figure out how to start a new thread.

[BWK]

flatlander,

Thank you for the input! I would check that, but I just replaced the plugs about a week and a half ago. The problem was presenting itself before this and now after. The only code that still presented after the plugs, coils and MAF is the P2097 which is indicating a possible vacuum leak.

is there a chance that a vacuum leak could cause this symptom (noise) in the video I posted?

Thank you all again!

[flatlander]

Definitely check your plugs, since you have recently replaced them. Check for proper torque.

The Vacumm leak would sound differently. I can't think of how it would be related to that noise.

You mentioned that you changed your MAF. You should check all your airflow connections, since you may have left one loose or disconnected.

Originally Posted by BWK

flatlander,

Thank you for the input! I would check that, but I just replaced the plugs about a week and a half ago. The problem was presenting itself before this and now after. The only code that still presented after the plugs, coils and MAF is the P2097 which is indicating a possible vacuum leak.

is there a chance that a vacuum leak could cause this symptom (noise) in the video I posted?

Thank you all again!

[Gurjit]

Originally Posted by flatlander

Definitely check your plugs, since you have recently replaced them. Check for proper torque.

The Vacumm leak would sound differently. I can't think of how it would be related to that noise.

You mentioned that you changed your MAF. You should check all your airflow connections, since you may have left one loose or disconnected.

sounds like exhaust leak,

[BWK]

Gurjit,

Are you speaking of an internal exhaust manifold leak or downline?