Rattle passenger valve cover area 15 TDI

1077 Views 53 Replies 12 Participants Last post by TouaregHauler2021, 8 d ago

TouaregHauler2021

Discussion Starter · 21 d ago

2015 TDI, 220k km’s. Just noticed a rattle that comes and goes every second or two. I first noticed when I was in a drive thru and the noise was bouncing off a brick wall.. It’s very faint in the video. Cold and hot.

I just did a 6 hr drive Monday night and she ran perfect. Checked the codes and nothing.

To me it sounds like a bearing failure or something that is rotating but loose. Or maybe just a loose heat shield. Hoping not a chain tensioner or HPFP.

Oil was changed not long ago with a VW filter. Fuel filter 20k ago. I do oil every 8k km’s and fuel filter every 20k so the fuel filter is due. Coolant was done about 65k km’s ago when I purchased it.

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TouaregHauler2021

Discussion Starter · #2 · 20 d ago (Edited)

Another vid, listen for noise at 39 seconds. I changed the oil filter, no change. When you hear the noise you can see the engine move.

It’s almost like there was a slight miss that coincided with the noise.

I have a stage 2 tune and delete pipes but have not installed them yet. I guess I will hold off until this is sorted.

I could change the fuel filter and do a liquid moly diesel purge. But can’t see how that would help unless it’s missing due to an injector issue.

I have OBD Eleven pro. Only because I’m a mac user. Lol. But it can do most things.

Dannyboy485

· #3 · 20 d ago

Could be the alternator one way clutch or one of the idler pulleys. Loosen off the belt and check em all

Reactions: 1

Flerky

· #4 · 20 d ago (Edited)

Well, its quite weird metal knocking noise. I would say, that if it is coming from valve cover, it could be rocker arm.
To prevent any further internal damage, I would check it asap.

EDIT: is it louder on right side?

TouaregHauler2021

Discussion Starter · #5 · 20 d ago

Yes it’s on the right side (passenger side) I don’t think it’s from any of the belt rollers, alternator etc.

I am going to get a stethoscope today and will also add in a friction modifier to the oil and see if I can isolate the noise.

I won’t drive the car until I have identified this noise. Ugh

Flerky

· #6 · 20 d ago

3.0TDI does not have issues with rocker arms, but something could happen. Its definitely not from pulleys or alternator.
What engine code do you have?

TouaregHauler2021

Discussion Starter · #7 · 20 d ago

No codes when I ran it yesterday, I will do a scan again today when I get the stethoscope.

I should also note that the other day while stopped at a light I felt the car shudder a few times at idle. Kinda felt like a miss fire.

Brobb

· #8 · 20 d ago

It does not sound very rhythmic to me. A complete guess.. but maybe a piece of one of the timing chain tensioner guys broke off and is being got by the chain randomly and thrown around the crank case? Sounds like plastic clanking a harder surface to me. Those guides are plastic and known to lose pieces once worn. Complete guess though.

Flerky

· #9 · 20 d ago

TouaregHauler2021 said:
No codes when I ran it yesterday, I will do a scan again today when I get the stethoscope.

I should also note that the other day while stopped at a light I felt the car shudder a few times at idle. Kinda felt like a miss fire.

I didn't mean error codes, but engine code. Is it CVVA?
Well, "like misfire" doesn't sound good. If you decide to take it to some shop/dealer, transport it on tow truck.
Until you know, what causes this "rattling sound", it shouldn't be started.

TouaregHauler2021

Discussion Starter · #10 · 20 d ago

Its A CNRB, and I only found an intermittent fault in the history for bank 1 #4 exhaust gas temp.

OBDeleven vehicle history log
Date: 2023-05-19 09:26:13

VIN: WVGEP9BP9FD008031
Car:
Year: 2015
Body type: UNKNOWN
Engine: CNRB kW ( hp) l
Mileage: 219895 km

---------------------------------------------------------------
01 Engine
System description: 3.0TDI FSA
Software number: 7P1907401C
Software version: 0010
Hardware number: 7P0907401K
Hardware version: H21

Faults:
P247000 - Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 4
Intermittent

P246F00 - Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4
Range/Performance
Intermittent

U012600 - Lost Communication With Steering Angle Sensor Module
Intermittent

See less See more

TouaregHauler2021

Discussion Starter · #11 · 20 d ago

Brobb said:
It does not sound very rhythmic to me. A complete guess.. but maybe a piece of one of the timing chain tensioner guys broke off and is being got by the chain randomly and thrown around the crank case? Sounds like plastic clanking a harder surface to me. Those guides are plastic and known to lose pieces once worn. Complete guess though.

Yes that is what it sounds like to me also. Something being picked up a thrown about.

Flerky said:
I didn't mean error codes, but engine code. Is it CVVA?
Well, "like misfire" doesn't sound good. If you decide to take it to some shop/dealer, transport it on tow truck.
Until you know, what causes this "rattling sound", it shouldn't be started.

Ya definitely not starting it. Outside of maybe running for a minute with the stethoscope, even that could be risky.

SaVAGeSoot

· #12 · 20 d ago

What do your injector deviations look like at idle?
What is your chain stretch like? (Camshaft adaptation)

SaVAGeSoot

· #13 · 20 d ago

Have you looked at your old oil? (strained it, etc) to see if any debris comes out.... like guide shrapnel, etc.

Flerky

· #14 · 20 d ago

Are u able to take off valve cover (DIY)?

TouaregHauler2021

Discussion Starter · #15 · 20 d ago

SaVAGeSoot said:
What do your injector deviations look like at idle?
What is your chain stretch like? (Camshaft adaptation)

Will check those, stand by

SaVAGeSoot said:
Have you looked at your old oil? (strained it, etc) to see if any debris comes out.... like guide shrapnel, etc.

Oil was changed 2 weeks ago, and it was clean, with no metal no fragments. But I can drain it again if need be.

Flerky said:
Are u able to take off valve cover (DIY)?

Normally yes, I have a lift and restore old 928's but I had a major skiing accident and screwed up my neck so it is almost impossible for me to wrench at this time. It may be months of Physio before I can tackle something like this.

Flerky

· #16 · 20 d ago

TouaregHauler2021 said:
Normally yes, I have a lift and restore old 928's but I had a major skiing accident and screwed up my neck so it is almost impossible for me to wrench at this time. It may be months of Physio before I can tackle something like this.

Sorry to hear that. Take it to some experienced/verified shop. Without taking off the valve cover, its just a blackbox.

Reactions: 1

TouaregHauler2021

Discussion Starter · #17 · 20 d ago

I will need to find a good indy in the GTA, not taking this to my dealer. The accident could have been much worse, I went down hard on ice at speed, 11 patrollers around me since I could not move my neck. It was scary, but apparently, my bones are made of titanium, LOL.

Dannyboy485

· #18 · 20 d ago (Edited)

The reason I say take the belt off first is because it's the simplest thing to check first. And doesn't involve opening any part of the engine first. If nothing is found then move on to internal components.
I'd say it's probably timing chain guide part also that's getting caught in the valvetrain but since it's plastic it shouldn't last long

SaVAGeSoot

· #19 · 20 d ago

TouaregHauler2021 said:
Oil was changed 2 weeks ago, and it was clean, with no metal no fragments. But I can drain it again if need be.

The guides\skates should be a hard plastic not metal.

TouaregHauler2021 said:
I will need to find a good indy in the GTA, not taking this to my dealer

Not in your hood, but I would trust Jeff with something like this, so I'd suggest taking it to him.

www.smoutsgarage.net

smoutsgarage

Smout's Garage & Auto Sales offers a complete line of automotive maintenance & repair services, as well as used vehicle sales. We service all makes and models, but our specialty is Volkswagen and Audi.

www.smoutsgarage.net

www.smoutsgarage.net

Reactions: 1

TouaregHauler2021

Discussion Starter · #20 · 20 d ago

Thanks, I will give Jeff a ring. Don't mind traveling for a good tech.

Edit, they are closed for the long weekend so will have to call him on Tuesday.

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