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#1
04-22-2010, 11:37 AM
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Engine valve tap?
Hey guys,
For the last 10K miles or so I've noticed a "tap" coming from the engine of my '08 Prix. I'm at 88K miles right now, and I have a 100K powertrain warranty from the factory. I've kept all my previous Prix's for 10 years, and gotten up into the 230K range before letting them go, and I plan to do the same with this one, so I am a little concerned about this. Does anyone know how something like this is treated my GM? It's just a noise at this point, I can't say the engine isn't running right or anything. I guess I won't know for sure until I take it to a dealer, but I wanted to get some input here, what do you think? FWIW, I've changed my oil every 7K with Mobil 1 Extended Performance (gold cap) and I have all the receipts.
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000 
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#2
04-23-2010, 01:40 AM
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Re: Engine valve tap?
88K miles with an '08?
 Why did you decide to use the Mobil 1 Extended Performance synthetic oil and 7K exchange interval? It should be covered under the 5 year/100K mile powertrain warranty so take it to a GM dealership and see what they say.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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