Question about 2000 Cadillac DeVille

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Car overheating got a subaru 2lt turbo year 02 when its ticking over its fine but when driving it it over heats theres no water coming out of the exhaust the blowers inside the car has been blowing hot and cold for a few weeks water is dissapearing from the radiator

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Your message is listed along with 2000 DeVilles - not gonna get much feedback that way -
Even though you don't have visible water coming from the exhaust, the combination of overheating and coolant loss still sounds like a blown headgasket.
When the engine is running, you are pushing exhaust gases into the cooling system and producing heating of the coolant the radiator can't handle. When the engine cools down, you are probably sucking a little coolant into one or more cylinders.
Tie an old towel over the tailpipe before starting the cold engine to see if the exhaust gases are as dry as you think.
Depending on how bad or where the head gasket is failing, watch for any oily signs in your coolant, any signs of engine oil turning into hand creme and with a cold engine, take the coolant fill cap off, then start the engine allowing it to warm some and watch your coolant overflow bottle for bubbles. If you find any of those signs and are still not convinced, pull each plug and look for signs of rust on the plugs. If you find it, well . . . Any or all of the symptoms above say 'blown headgasket.'   

Posted on Dec 18, 2008

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Yes, there IS a known oiling problem:

Subaru TSB 02-103-07
Applicability: All Turbo Equipped Vehicles
Subject: Turbocharger Oil Supply Mesh Screen
http://store.forcedperformance.net/merchant2/graphics/subaru_oil/02-103-07.pdf

"... If clogged or restricted, it will reduce or cut off oil supply to the turbo, resulting in failure. ..."

Your turbo may be toast! ***ouch!***
I have found more info on 2004 - 2007 models, but may or may not be applicable to your 2000 Impreza. I am not familiar with the the UK model differences, but if yours has AVCS use your favorite internet search engine to search for "Subaru AVCS" or "Subaru TSB". Good luck!

Additional comments/info from Forced Performance:
Oil Starvation of Turbos on Subaru Vehicles: Why and How.
http://store.forcedperformance.net/merchant2/merchant.mvc?Screen=Info_SubaruOil

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