CitroJim's AX, C3 Picasso, Cycling and Running Tales

[mickthemaverick]

I'll plump for the brighter red one?

[RichardW]

2.2 Mazda diesel - 100k or thereabouts? The inlet manifold will be almost completely clogged, and it probably needs a new exhaust cam. If you're lucky it won't need new turbos - yes plural, there are 2! I know you don't do you tube, but there are some really good vids from Peter Kennedy in Ireland, no gimmicks just his Irish commentary on what he's doing to fix them.

[myglaren]

I almost bought one when I got my current Mazda 6 'uya' (the 'Tak' bit has fallen off).
It had a cracked windscreen so passed it over. Then found out about the camshafts and turbos. Probably a lucky escape.

[CitroJim]

I'll plump for the brighter red one?

Yep

2.2 Mazda diesel - 100k or thereabouts? The inlet manifold will be almost completely clogged, and it probably needs a new exhaust cam. If you're lucky it won't need new turbos - yes plural, there are 2! I know you don't do you tube, but there are some really good vids from Peter Kennedy in Ireland, no gimmicks just his Irish commentary on what he's doing to fix them.

Oh dear, thanks Richard; indeed, well over the ton. I'll pass that news on... I expect he'll be moving it on after seeing that... I would!

[CitroJim]

Richard, do you know if this variety of 'snake oil' might help my friend's Mazda?

https://www.eurocarparts.com/p/wynns-di ... -555770100

Given his is only getting MAF sensor errors and there's no great sign of engine distress yet although it does sound a bit rough to me - but then after a DV6 a sewing machine sounds a bit rough so I'm in no position to judge...

[RichardW]

I very much doubt it, but nothing ventured, nothing gained! Here is a still from one of Peter Kennedy's vids to show just how blocked these can get:

[mickthemaverick]

I had similar issues on my Delica and treated it with the Lucas product of a similar nature. It did significantly improve the emissions and it ran smoother without a doubt if that 's any help?

https://www.ebay.co.uk/itm/326307274104 ... R6rigf7nZA

[CitroJim]

Thanks both We'll venture it next week. It'll be interesting if nothing else...

Those stills are rather shocking... Amazed the engine could run at all

[bobins]

I've said it before, and I'll say it again : The first car engine was developed well over 100 years ago, and there's been an awful lot of development on them since, and yet we're reduced to this - a car engine that isn't fit for purpose.

[CitroJim]

I've said it before, and I'll say it again : The first car engine was developed well over 100 years ago, and there's been an awful lot of development on them since, and yet we're reduced to this - a car engine that isn't fit for purpose.

Yes, absolutely... I think it's criminal. That, along with the Ford EcoBoom and the PSA 1.2 PureTech, is truly scandalous...

Thing is, in the late 80s and mid-late 90s PSA had it just about spot-on with things like the ES9J4 V6, the TU, the petrol XU series, XUD diesels and the first-generation 8V HDi... After that it all went a bit Pete Tong with maybe some versions of the DV6 (the 8 valve version) being a bit of an outlier in a sea of mediocrity...

And then we have the AdBlue scenario...

[Zelandeth]

I still stand behind something that I said about 20 years ago - that whoever had the idea of fitting an EGR system to any engine that's fed by any means other than either a carburettor or throttle body injection should have been told flat out that the suggestion was nonsense and would result in far too big reliability problems down the road to offset any gains that might be made in emission numbers. Especially as the technology existed even back then to get the same results through other means - Just not as cheaply.

It's not an inherently problematic system - with the provision that you have an inlet tract that's being continually cleaned by the fuel charge passing through it. As soon as that is removed it doesn't take a genius to see that there's going to be a problem. Of course it became a thousand times worse when they started *also* adding further nonsense like movable swirl flaps into the inlet systems (which were already going to clag themselves up anyway), just as another item to get jammed up by the soot, or break off entirely and get ingested by the engine with predictable results. Vauxhall and BMW I seem to recall being the most commonly afflicted there.

Of course these all got used though as it was the cheapest way to meet the emissions targets and cheap is all the companies making these things care about. They couldn't care less about what happens to the car once it's five years old.

[Stickyfinger]

They couldn't care less about what happens to the car once it's five years old.

nail, meet hammer.....whole post summed up ...

[Huskyxantia]

I very much doubt it, but nothing ventured, nothing gained! Here is a still from one of Peter Kennedy's vids to show just how blocked these can get:

OMG ! That carbon is shocking.

[MattBLancs]

OMG ! That carbon is shocking.

Ditto! That is amazingly clogged.


I'm wondering if it is more a case of a particularly poor PCV system?
Surely, if purely lots of soot from EGR only, it'd likely pass into engine fairly readily, but the PCV system providing lots of oily vapours is providing the nice sticky coating to the inside the manifold (and onto the layer of carbon) and allowing it to build up?

Just thinking aloud

[CitroJim]

On my way to running an ultramarathon today

(c) Big Bear Events

Delighted to coach and pace a good friend to his very first marathon at this event That made it very special indeed...

It was cold although very beautiful in the forest and running conditions were just about spot-on