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Old 18th August 2009, 04:42 PM
A8 3.7 A8 3.7 is offline
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Join Date: Mar 2009
Posts: 30
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Hi, just replaced mine on a 96 3.7 it's located on the drivers side cylinder head at the back if you remove the plastic air intake pipe from air box to throttle housing you can just see it, good tip make sure engine is cold and release the pressure in the cooling system before changing if you're quick you won't lose to much coolant. Also while you are there check for any oil leaks from the 2 blanking plates on the back of the head the seals go hard and leak, dripping oil onto the exhaust front pipe. The seals are cheap only a couple of quid from the dealer.And also check the breather pipe from the centre v of the engine to the rubber connecting piece on the throttle body this perishes and causes all sorts of engine running problems, been there, done that and got the t shirt. Hope this helps
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