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Thu 27 Apr 2006 12:04

General: longevity of a turbo (in an MB) - Roger Jones

Any information, views and opinions on the life expectancy of a turbocharger?

I ask because I'm about to look at a 1990 MB W124 300E (M103 engine) fitted (when new) with a Garrett T2 twin turbo system. It has already been replaced once and I'm wondering when it's likely to need replacing again. It is clear from what I've read so far that, although such devices are essentially "fit & forget", regular and rigorous general engine servicing and oil changes are essential to getting the most out of them; the record looks pretty good in the case in question.

Any clues on replacement cost would also be welcome, as well as views on the wisdom of installing a reconditioned system (in an exchange deal) instead of a brand new replacement.

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Thu 27 Apr 2006 12:30

General: longevity of a turbo (in an MB) - Armitage Shanks {p}

Not a direct answer but my recent experience with a 7 year old car suggests that almost anything that needs doing on a 16 year old Mercedes will cost more than car is worth, particularly a twin turbo, whether new or recon. At what mileage was the turbo replaced and how near is the getting to that mileage again, if you follow my poor syntax?!

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Thu 27 Apr 2006 12:38

General: longevity of a turbo (in an MB) - Roger Jones

It was done at about 100k, I think, by a fastidious second owner who replaced it in spite of its not having failed.

As to cost and value, I just don't think in those terms with cars of this type and age. A money-conscious friend asks me if I've had my 1984 Capri valued every time he sees it; he gets the same response every time -- "I have it to enjoy, not to count beans". And I've been enjoying it for all of its 21 years (bar an extended period when my broken back wouldn't allow me to use it).

Thanks for responding.

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Thu 27 Apr 2006 14:55

General: longevity of a turbo (in an MB) - Armitage Shanks {p}

I hear what you are saying - a really good old model E class should be great. But even if you don't actually care what it is worth, in cash as opposed to worth to you, would you spend £x+500 on a car worth £x in the open market. If you love it I guess you would but how far would you go? Think of all the ads you have seen for a car for £20,000 which is "6 months out of a £50,000 nuts and bolts rebuild" etc.

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Thu 27 Apr 2006 16:06

General: longevity of a turbo (in an MB) - Roger Jones

Having had the Capri for 21 years and my Golf VR6 for 9.5 years, you'll understand that I'm in it for the long term and, if forced to, would rationalize costs over at least a ten-year span. Although I may sell the Golf shortly, I fully intend to keep my other cars for many tens of thousands of miles, even if I win the lottery. Yup, I chose them carefully and I really do like them that much. Of course, there are limits, but I enjoy taking care of things and seeing them beat the law of averages.

Anyway, back to the main theme: my mechanic has just paid a visit and he says he's never had to replace a turbo system on a petrol vehicle, although he's had to do it once on a diesel (he works only on German cars). They are perhaps more durable than I feared, but it does depend crucially on appropriate driving habits and, as indicated above, rigorous maintenance of the engine. Not surprising, given the 150,000 rpm at which they operate.

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Thu 27 Apr 2006 18:26

General: longevity of a turbo (in an MB) - madf

Frined had a Porsche 924 turbo. Turbo failed at around 110k (it was very seconhand). Replacement turbo also failed cos garge who did the job failed to connect the oil feed correctly (talk of gaskets etc...).

I suspect a lot down to fastidious maintenance by competent people - which rules out lot of the garages I have had experience of.
madf

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