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There's a VW Touareg with the 3l v6 that FB marketplace keeps showing me for £2k, the ad says that the engine is knocking although it does run and move.
Now I'm not really considering it, but I'm thinking it's likely just big ends or something along those lines. Could be a.. fun project.. 🙂
What else would cause knocking from the engine besides big ends?
Facebook keeps trying to get me a buy a Touareg with the V10 diesel.
How much is that one?
Oh lol, I just searched for Touaregs and there's another one fully working for only £800 more!
How much is that one?
sadly, more than £2k. But V10 so definitely worth it
could be all sorts of things. Big ends likely tho. fancy putting a new engine in?
Faulty injectors will make a kocking sound and I would have thought far m ore likely than the bearings being worn.
Unless oil changes/level have been seriously neglected or there's a lot of fuel blowing past the pistons, in which case the turbo would have gone first. I've not seen/heard of a big end going since the millennium. Modern oils just don't degrade like old mineral oils did, and engines are simply built better.
I’ve not seen/heard of a big end going since the millennium. Modern oils just don’t degrade like old mineral oils did, and engines are simply built better.
Apart from a number of BMW engines, S54, S65, S85 all need rod bearings around 80,000 miles
I’ve not seen/heard of a big end going since the millennium
Th8s can happen if you completely ignore all servicing.
Is a horrible rattly clatter not standard for tractor fuel engines then?
No. That's a joke I also haven't heard since the millennium.
Does knocking not mean detonation/pinking rather than the sound of bearing failure. Could be all sorts of things.
Wouldn't touch it with a barge pole! Only sells on FB Marketplace from a yard, hasn't been trading for very long, no details anywhere else and nothing seems to sell. Tried to go see the silver Z4 he's had for sale for a while and the communication was terrible to the point I gave up. Could be a proper legitimate business and just crap at selling online but it gave me way too many Red Flags without even seeing the car.
All being said though? Do it, we need a decent repair thread from you! The 'journey' will be epic.
I'm about 15% tempted at the moment 🙂 But given the others on sale it makes little sense. But, if I'm going to flog the Merc and buy a banger, there are plenty of options that aren't gas guzzlers.
It on for 2k for how long? No takers, then offer 1k explain to potential issues and the risk.
It has been there a few weeks. I reckon I could tell the difference between a big end and injectors.
Does knocking not mean detonation/pinking rather than the sound of bearing failure. Could be all sorts of things
In my experience knocking is most noticeable when the oil has reached temperature.
A healthy engine will get quieter as it warms up.
Is a horrible rattly clatter not standard for tractor fuel engines then
Manufacturers add a little extra fuel to quieten down the sound of diesel ignition. The most efficient diesels sound awful.
Hateful things and yeah I struggle to tell what’s diesel ignition and it’s about to throw a Con rod death rattle.
A drummer would probably be able to hear the difference in the beat from ignition and rod knock.
if its the car reluctant jumper linked to its an utter shed. Moss all round the skylight says its had a hard life and not been cared for and seems to be a rust stain on one side and generally very tatty looking
if its the car reluctant jumper linked to its an utter shed
Check it's MoT history, it's errrm, comprehensive! https://www.check-mot.service.gov.uk
As far as the engine knock is concerned it could be a relatively cheap repair involving big end shells, but it could be an horrendous mess of bent conrods and piston slap. There's no way of knowing remotely
Moss all round the skylight says its had a hard life and not been cared for
My cars have all had moss growing on them - I clean it off, it grows back. Mostly because crows pull moss off the roof and bits of it go all over the cars all the time.
Hateful things and yeah I struggle to tell what’s diesel ignition and it’s about to throw a Con rod death rattle
Give over. If you're that clueless about cars you probably have loads of them driving past you all the time and you think they're petrol. Over a third of UK cars are diesel...
Give over. If you’re that clueless about cars you probably have loads of them driving past you all the time and you think they’re petrol. Over a third of UK cars are diesel
There are 3 vehicles outside my house. One is a 37 year old 3 litre 4 cylinder petrol, another is a 20 year old 1.6 petrol.
The other is a 1.5 litre euro 6 diesel less than a year old.
One of them sounds like a bag of spanners, especially when cold.
I’ve driven diesels for 30 years, yes they’re more refined now, but no they don’t sound like petrol.
The other is a 1.5 litre euro 6 diesel less than a year old.
One of them sounds like a bag of spanners, especially when cold.
Guessing there's something wrong with it then or you have some pretty soft spanners in your spanner bag.
Now, my neighbour's 2009 E-class estate's v6, that sounds clacky on start up, but I don't really see this as a problem. It's a car not a musical instrument.
And my other car's an EV so everything sounds like a mess compared to that.
And my other car’s an EV so everything sounds like a mess compared to that
The sooner all those Diesels are replaced by electric or hydrogen the better.
Guessing there’s something wrong with it then or you have some pretty soft spanners in your spanner bag
I’ve had 3 in the last 3 years, they all sound the same. (Company vehicles)
As you say it’s irrelevant to an extant, until it comes to hearing knock, If I had a petrol vehicle that sounded like a diesel, I’d be worried.
As I tried to say before, in my experience a worn engine will knock more when it’s warm. The oil takes roughly twice as long usually to reach temperature than the coolant. The oil pressure light might then come on at idle as the oil thins. If a bearing spins, it’s going to need a crank too. But you probably know that.
I was told by a chap running a diesel injector/cylinder head Endurance test cell I was working on that they try and tune out diesel ignition noise with extra fuel/clever fuel timing and a really loud diesel is the most efficient.
Could also be a worn cam . If the lobes get worn they don't stay in contact with the followers. This was a vw issue in the early 2000s vag deisel engine cars
Do they have hydraulic followers? They make a racket if they drain or stick
My cars have all had moss growing on them
My old car was so mossy it was declared a Seat of special scientific interest
Diesels don't sound like conventional petrols but modern 3cyl petrols are closer to a modern diesel than a >3cyl petrol.
I'd buy a car with a knocking engine if the rest of the car was in great nick ANdD the cost was in line with fitting a new engine
For 800 quid off I'm out !
It’s a car not a musical instrument.
Why not both? 🥹
I thought you were going to post this
Manufacturers add a little extra fuel to quieten down the sound of diesel ignition. The most efficient diesels sound awful.
How's that work when diesels aren't stochiometric?
MY guess would be its altering the injection timing rather than fuel ratios which as you say would not work. Retarding the timing at low revs/ tickover perhaps?
Give over. If you’re that clueless about cars you probably have loads of them driving past you all the time and you think they’re petrol. Over a third of UK cars are diesel…
...and they mostly sound like ass.
SOME diesels sound good, but they aren't 4 pot 4-strokes...
A quick google:-
With the electronic injectors, not only is it continually optimized, there's multiple injection events, including a "pilot charge." A small bit of fuel is injected first to warm up the chamber even more before the main charges, giving a more uniform, complete combustion. This also translates to less rattle. (Note: While a lot more timing can make it more efficient, and rattle more, it also negatively impacts emissions, so they've gone away from that as well.)
My Merc does multiple injection pulses. I thought it was to do with preventing pinking and adding the necessary amount of fuel later in the cycle.
So it goes bang when you want it to, not when it decides to