Reliability of the new 4L V8 engines

[Frost9380]

Hi all im new here.

Im curios about those new engines as well others like the 2L in the A45. Is they solid, a how many km can you expect, i mean they keep pruducing more and more hp, with smaller and smaller engines.
I just wondering

 

[AMGeed]

Nobody has yet reported an engine problem with the 4.0 biturbo. As to how many kms to expect, well AMG have a good reputation and there is no reason it can't go on indefinately with correct servicing. The 2.0 turbo also has a good reputation and even modified ones are not being reported with problems.

 

[c63chris]

On the A45 owners forum the only people posting with problems were those that had aggressively tuned them. Early ones had a recall on the turbo.

 

[Adamccc]

That's not entirely true; one in the states was quite publicly hydrolocked and written off after driving in heavy rain and I think there's been quite a few with issues after being mapped but not a lot over here in stock form have gone wrong.

 

[540YMX]

That's not entirely true; one in the states was quite publicly hydrolocked and written off after driving in heavy rain and I think there's been quite a few with issues after being mapped but not a lot over here in stock form have gone wrong.

I think the hydrolocked C63 was the owners own fault for driving around in conditions more suited to 4x4's. It seemed a very dumb thing to do.

 

[kit17]

I think the hydrolocked C63 was the owners own fault for driving around in conditions more suited to 4x4's. It seemed a very dumb thing to do.

Yes this was the You Tuber AutoVlog’s C63 coupe . He was out in a really bad storm when a passing car drove through a massive puddle. The standing water hit the c63’s air intake at just the wrong angle and caused it to hydrolock. A freak incident rather than a reliability issue.

 

[fozi.g]

It looks like Mercedes are throwing these lumps into pretty much every AMG performance car they bring out. I had an issue with both my C63’s where I had a slight hesitation between gearchanges and a very slight loss of power. It was only intermittent but very annoying and detracted from what would normally be a very smooth gear change. Not too sure whether it’s a reliability issue but certainly an issue nevertheless l. A software update helped but never alleviated the issue. Never happened in my AMG GT which had the same lump.

 

[Petrol Pete]

'There is no substitute for cubes' is a saying that goes back years into the development of big V8 engines in the USA. That lot built massive engines (and still do) that produce woefully feeble horsepower per cc. Same with Harley Davidson...pathetic output from the cc size of the engine. But with correct servicing these engines will plod on forever. My car with 8 cylinders and 5.4 litres puts out about 360 bhp (allegedly) about the same as a 2018 VW Golf Type R gets from 2000 cc. Whichever way you look at it and for whatever reason (mpg ?) one of these engines is working pretty hard, and the other one isn't.

 

[markjay]

'There is no substitute for cubes'...

'There's no replacement for displacement'

 

[markjay]

That lot built massive engines (and still do) that produce woefully feeble horsepower per cc.... But with correct servicing these engines will plod on forever...

Yup

Modern engines are highly stressed in comparison.

 

[Bieldside]

The V12 is the ultimate
None of this environmental stuff !!!
I can now say that
SL65 630 bhp
Not at all politically correct!