Re: Turbo 101

[c a l i b a n <caliban@sharon.net>]

On Fri, 12 Feb 1999, P-O Selander (EUS) wrote:

]In older cars (early Saab Turbo and I think also Audis) there were
]frequently problems wit the turbos (oil leakages and bad bearing, clogged
]lines). Many times the turbos were not water-cooled and once shut off, they
]"baked" the oil inside due to extreme heat (and no oil circulation),
]clogging the oil lines. This was later taken care of by in some cases having
]the water evaporate in the turbos (having water go from liquid to steam
]requires tons of energy) and thereby providing cooling. Some cars have a
]pump that continues to pump the coolant around even after the engine is shut
]down, some cars pumps the oil around after shutoff, some even before.

	the short-lived trend of turbo charged motorcycles
	also saw this kind of thing hapen.  with bikes you 
	can be winding out and going bat out of hell and really
	quickly shut down and hop off; the turbos baking to
	death under the load and heat.

	i always warm up my urq for 60-90 seconds and then
	drive it quite conservatively for the first five or
	ten minutes to baby the turbo.  i cool it down for
	at least two minutes, preceeded by a five or ten
	minute stint of conservative, boostless driving.

	i was fortunate to get a car that had the turbo
	replaced (at 45k miles).  the reason?  the original
	owner did not observe warming and cooling practices.
	i say fortunate because he had to pay and i got the
	younger unit :)


--
 rocky mullin
 http://caliban.sf.ca.us/
 two strokes are faster than four!
 this message was composed using the vi editor.
 '83 ur-q - yamaha rz350 - suzuki ts250 -  chaotic good