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Buick Lucerne: CX Engine Question

12 messages,  Last post on Jan 02, 2008 at 5:19 PM

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What is this discussion about? Buick Lucerne, Buick Park Avenue, Engine, Sedan

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#8 of 12 Re: Lucerne cx engine question [gregman] by imidazol97 Aug 18, 2007 (5:39 pm)
Replying to: gregman (Aug 18, 2007 5:33 pm) The Series III intake completely solves the problem, be it Dexcool related or just poor intake design for the EGR tube related. Some have asked if they can put the aluminum upper onto a Series II-based 3800. Grin.   But the original GMs are good for about 75000 miles. Many people never have had a failure, like yourself, in the time most people would keep a car. It's low but irritating percentage. I've seen how they used a different EGR tube up through the plastic intake with a larger air space around the metal tube and that would fix the heat deterioration. People who repaced with a different brand on first failure don't usually have a second failure. Some think the Dexcool not being changed at 24000 miles/2 years like ordinary antifreeze is a factor since in some cars it deteriorates, primarily those who have low coolant levels and the hot coolant is mixed with air.   The replacement of the upper intake is relatively cheap. At first some dealers were really gouging, almost like foreign dealers. But now individuals change their own and many find independent shops doing it cheaply.   Series III-okay. Justchange Dexcool frequently, it's cheap.
#9 of 12 Re: 3800's [imidazol97] by thegraduate Dec 06, 2007 (8:34 am)
Replying to: imidazol97 (Apr 15, 2007 5:00 am) I'd buy my next car with one and I'm sorry to hear they're being phased out. I may buy a used car with one since I fully understand the intake features.   I know this post is old, but I figured I'd respond anyway.   Here's why its being phased out:   Buick Lucerne: 4-speed Automatic 197horsepower, 227 lb-ft 16/25 EPA Estimates   Ford Taurus: 6-speed Automatic 260 horsepower, 245 lb-ft 18/28 EPA Estimates   Toyota Avalon: 6-speed Automatic 268 horsepower, 248 lb-ft, 19/28 EPA Estimates   The 3800 in the Buick is not really competitive at all with cars from the 21st Century. It was fine 10 years ago, but when you can have more power AND economy from one of its competitors (even GMs own Impala has more power and mileage), the Buick starts looking obsolete.
#10 of 12 vibration from plastic engine cover by usaicon Dec 24, 2007 (10:13 am)
I have a V6 2006 Buick Lucerne with 24000 miles. I have recently noticed a vibrating noise from the engine compartment that sounds like a hollow plastic box, when the engine is under torque. I removed the black plastic cover that says 3800 and the noise seems to have disappeared. Is there a way to tighten down this cover so it doesn't vibrate?
#11 of 12 07 Buick Lucerne CX problem by mborak Jan 02, 2008 (11:53 am)
When driving at steady speeds I sense periodic subtle resistance and slight tugging resulting in a choppy driving experience instead of smooth. I have taken it into 2 different dealers who have not acknowledged the problem. I drive 80 miles each day and still feel like something is not right. Vehicle has only 2000 miles on it. Any ideas? Replies to this message: imidazol97 (Jan 02, 2008 5:19 pm)
#12 of 12 Re: 07 Buick Lucerne CX problem [mborak] by imidazol97 Jan 02, 2008 (5:19 pm)
Replying to: mborak (Jan 02, 2008 11:53 am) At 2000 miles, the dealer can go over tire pressures and wheel alignment. If the tire pressure recommended is 30, I run 32-33. I like to feel the road. I'm suggesting your push and pull sensation could be tires.   It also could be alignment. They will realign up to 12000 without having to stomp your feet.   The other could be fuel quality? Or a misfire in the plugs in the motor. Try driving in 3rd gear instead of OD which allows the car to shift into 4th gear. How fast are you going when you feel this tugging sensation?

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