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VW Passat Turbo Operation

15 messages,  Last post on Dec 21, 2007 at 9:11 AM

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#7 of 15 Re: VW Passat Turbo Cool Down and Warm Up Needed? [shipo] by awaretek Dec 12, 2007 (11:28 am)
Replying to: shipo (Dec 12, 2007 8:52 am) Shipo,   Thank you agin VERY MUCH for your kind and helpful advice.   Questions:   1. Is the turbo mechanism always operating when the engine is running? Or does it only kick in under heavy acceleration or rpm's?   2. What does the VW owner's manual say about Cool Down issues, I wonder? It occurs to me that it would be best if I could see a Manual BEFORE I buy ) Does the manual recommend a Cool Down period, and how long and under what conditions I wonder?   3. How many modern cars use turbo chargers? I understand Diesels do but they are not as high torque, temperature and thus not subject to the Cool Down requirement? I older how many non Diesel models have turbos and I wonder about the relative reliability etc.?   4. Do all Turbos require the same kind of extra care about maintenance as VW turbos?   Thanks for your patience...   Ron Replies to this message: shipo (Dec 12, 2007 11:56 am)
#8 of 15 Re: VW Passat Turbo Cool Down and Warm Up Needed? [awaretek] by shipo Dec 12, 2007 (11:56 am)
Replying to: awaretek (Dec 12, 2007 11:28 am) 1. Is the turbo mechanism always operating when the engine is running? Or does it only kick in under heavy acceleration or rpm's?   Yes, if the engine is running, the turbine is turning, albeit slowly when the engine is idling.   2. What does the VW owner's manual say about Cool Down issues, I wonder? It occurs to me that it would be best if I could see a Manual BEFORE I buy ) Does the manual recommend a Cool Down period, and how long and under what conditions I wonder?   Don't know.   3. How many modern cars use turbo chargers? I understand Diesels do but they are not as high torque, temperature and thus not subject to the Cool Down requirement? I older how many non Diesel models have turbos and I wonder about the relative reliability etc.?   Lots of cars with gasoline engines use turbochargers starting from the new Chevy Cobalt SS up through the wonderful twin turbo I6 engine that BMW is putting in their 335i and 535i. The fact is that turbochargers are not a new invention, I've seen test results with them on aircraft engines going back to the 1920s and I'm sure that they're older than that. Said another way, there is little mystery surrounding the care and feeding of a turbo.   As for your comment about diesels, ummm, if anything, they have higher torque than gasoline engines, in fact, MUCH higher. The real difference is what is referred to as the Turbo Inlet Temperature (TIT), gasoline turbos do tend to run a bit hotter than diesel turbos because the exhaust is hotter coming out of a gas engine.   4. Do all Turbos require the same kind of extra care about maintenance as VW turbos?   Short answer; yes.   Best Regards, Shipo
#9 of 15 ad 4 by krzyss Dec 13, 2007 (5:36 am)
Subaru just changed oil change interval on all turbo charged cars (starting 2008 if I am not mistaken) from 7500 to 3750. So all turbo cars require more and/or better care.   Krzys
#13 of 15 Some posts have been moved by pat HOST Dec 21, 2007 (9:11 am)
Here's the link: anna3064, "Volkswagen Passat Engine Issues" #37, 21 Dec 2007 7:15 am

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