Cooling the turbos on diesel engines
10-04-2008, 05:58 AM
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Good question.
At least old turbos needed some cooling time.
But since BMW don't mention nothing about it,
I suppose the new tech and materials takes care of it.
At least I have never idled my car after stopping.
At least old turbos needed some cooling time.
But since BMW don't mention nothing about it,
I suppose the new tech and materials takes care of it.
At least I have never idled my car after stopping.
10-04-2008, 07:03 AM
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Well for me, since I keep my vehicles longer than the average owner, I wouldn't "suppose" anything based on what BMW says or doesn't say. They're as caught up in the marketing gimmick as all the rest (in my opinion), proclaiming "lifetime" this and that. Read Mike Miller's observations regarding their maintenance schedule, and how dramatically things changed when they started offering "free" (read somewhat "prepaid") maintenance for 4 years. "Lifetime" fluids, bearings, etc. are in my judgment more the result of leasing and otherwise assuming lifetime = 4-5years or 100K miles etc., than they are the result of improved design, materials or technology.
Hence, until someone can show definitive factual evidence that design/materials/oil chemistry has indeed made turbo cool-down after significant work and high EGTs irrelevant, I'd stay on the conservative side of things and give them 90 secs or so... I put turbo-temp monitors with automated delay on my two turbo diesels for that purpose. But each to their own --
Cal
Hence, until someone can show definitive factual evidence that design/materials/oil chemistry has indeed made turbo cool-down after significant work and high EGTs irrelevant, I'd stay on the conservative side of things and give them 90 secs or so... I put turbo-temp monitors with automated delay on my two turbo diesels for that purpose. But each to their own --
Cal
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