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Discussion Starter #1
Hi guys,

The paranoia has kicked in... I just replaced filters and oil (Selenia WR 5W40), all four injectors were refurbed and the car is alive once again.

However, I still don't think it sounds quite right, especially on idle. I'm uploading two videos, one from outside and one from inside for you guys to hear at let me know your opinion. The car swirl flaps and EGR delete (hardware, no software touched yet).


I was referring to this video
and the car sounds the same to me, but I would love a second opinion.

I'm suspecting that the hydraulic lifters might be playing up, but that's a really costly repair around here...
 

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Yeah there are some metallic-punching sound. Well it could be anything: some injector, some lifter, pulley or internal because bad timming adjust (valve, piston compression too advanced). Inclusive simple software mapping if EGR-swirls are closed without remap idle-soi etc.
 

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Discussion Starter #3
I would rule out the injectors (the injectors were refurbed so they're fine) or bad timing (new belts ~ 10k ago) as the car is running fine.

On the other end, the car doesn't consume oil or coolant, it's running strong right now.

I'll get the car remapped soon to remove the EGR and SWIRLS out of the equation.
Do you think the EGR or Swirls delete might cause this metallic sound?
 

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Do you think the EGR or Swirls delete might cause this metallic sound?
It's possible because change combustion and sound but sincerely it is not my first suspicion.

DMF, oil pump and vacum pump can sound metallic too. Can start engine whithout aux belt to rule out all aux pulleys (alternator, a/c etc) and check metallic heater protectors.
 

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I'm suspecting that the hydraulic lifters might be playing up, but that's a really costly repair around here...
Well,I hope it isn't the problem I had, which turned out to be an ingested swirl flap and 2 bent valves. Very common on the 16v CF4 JTDM.

Swirl flap repair saga mega-thread
 

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Discussion Starter #6
Well,I hope it isn't the problem I had, which turned out to be an ingested swirl flap and 2 bent valves. Very common on the 16v CF4 JTDM.

Swirl flap repair saga mega-thread
Thank you for your reply Halftone!

I did see your video and I immediately called my mechanic as when he was doing the Swirls delete, he told me that two flaps were not in place, but not ingested by the engine (so, I was really close to having a bad bad day...), as far as I remember he told me they were still in the pipes, stuck somewhere and it was just a matter of time to get into the engine and do a big ass issue...

To be honest, all three videos here - mine, the random one from the engine sound and yours sound the same to my ears...

I'll drain some oil and try Liqui Moly hydraulic lifter additive as I don't want to overfill the oil.

I'll let you guys know what's the story! :)
 

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Discussion Starter #7
UPDATE:

So I did the following today.

I took 250ml of oil and added 250ml of Liqui Moly Hydraulic Additive.

Check out this bad-boy setup!

IMG_2678.JPG


IMG_2679.JPG


After the additive, I let the car in one place for ~45 minutes, it got warmed up to 90 degrees.

This is the result for now:


I do hear a difference, but I could be wrong.

Let me know what you guys think...

I'll be going on a long journey (800km) later on this week, I'll let you know what's the story afterwards.

Cheers!
 

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certainly sounds like a hit on one cylinder, can you do the "metal-rod-to-the-ear" thing and isolate where it taps? Be careful of moving engine bits obviously
 

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Hi Mytheroo,

What do you mean by "metal-rod-to-the-ear", I'm not familiar with the term?
get a metal rod, put it to your ear, put the other end on the engine in various places.....kind of like a stethoscope... lets you hear things better. Is better with an actual stethoscope but not many people have those
 

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Discussion Starter #15
Thank you for the notification guys... So, I went for a drive tonight. Cruising as low as 30km I can't hear the sound.

It progressively disappears, so I'm wondering if it's something internal wouldn't there be any other indications? Like smokey, lumpy running, etc?

The car pulls strong and it's working quite nice, I can't notice any issues when the car is in motion?

Would this point let's say a bad idler pulley or something of the sorts? I'll get to my mechanic next week so he can give it "a hear".
 

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Discussion Starter #17
I'll order one of those, but it will take a few weeks to arrive...

Is it just me or this sound quite familiar...?
 

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I'll order one of those, but it will take a few weeks to arrive...

Is it just me or this sound quite familiar...?
which bit of that soundscape are you talking about? The steady loud clicking or the more random ticks/crackles? In fact, I don't know which the video is trying to demonstrate either.
 

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Discussion Starter #19
"Insert lovely diesel sounds" :D

@Mytheroo I hope it's the steady loud clicking, but it could be the random ticks and crackles as you mentioned.

Well, I'll reach my mechanic soon, I'll order a Car Mechanics Stethoscope and if it arrives meantime I'll let you know.

Also, I'll have a good long drive this weekend and report afterward.

Thanks for all the help guys, this forum is awesome!
 

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If I understand correctly, your mechanic said you have two swirls broken off and stuck in the inlet tracts in the head..I had one broken off and entered the engine, bending two valves. Another was stuck in the inlet tract. This is common, but whether the flap will stay there is unlikely. If he left it, it may well have gone through the port and into the engine - the airflow is extreme and it is a loose obstruction. It has to be removed. I could see it with a mirror and torch, but was unable to fish it out - though I didn't try very hard as I knew the head had to come off because one flap had entered the engine. The flaps are stainless so a magnet doesn't help, but a dollop of hot melt glue on the end of a piece of wire might work, especially if you have a borescope to see what you're doing. I didn't back then, but I do now - a perfectly OK Android phone plugin, for about £7 on eBay

My car was still starting and running OK, despite the damage.I went through the same hopeful stuff as you. I tried a load of Wynnes Hydraulic lifter treatment in the oil, and initially it seemed to make a difference. I was kidding myself. The rattle came and went, sometimes loud, at other times barely there. The injector correction factors were all over the place, so maybe I had a dud injector? I actually did - the injector on #3 had a nozzle damaged by swirl flap shrapnel. I also persuaded myself that maybe the crank pulley was knackered,but a new one made no difference.... the correction factors turned out to be mostly the system trying to compensate for low compression from 2 leaky valves on the damaged #3.

NB all the carbon on the stem, from the leaky seat. The previous owner had driven a few thousand miles with it like this.

932018
932019


I would get a compression test done if your mechanic left a loose flap in head :(
 
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