I have a 2007 Buick Lucerne with a 4.6L Cadillac Northstar engine As you guys all know it overfills the engine bay and is a complete nightmare for changing parts especially the alternator where 50% of the car has to be dismantled.I want to change the serpentine belt so I need to know what I am up against.The vehicle is lightly used with only 65,000 miles on it. Any help especially diagrams or procedures would be most helpful. Thanks in advance
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Vkieley
Buick Lucerne Northstar 4.6 L- serpentine belt change
At 65,000 the belt should look close to new. What problems do you have that make you want to change the belt?
There's a tab on the belt tensioner hub with a square hole for a 3/8 or 1/2 socket wrench (I forget which size). Lever the tensioner to relieve belt tension and slip it off the P/S pulley. Patience, tools, magic words.
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There's a tab on the belt tensioner hub with a square hole for a 3/8 or 1/2 socket wrench (I forget which size). Lever the tensioner to relieve belt tension and slip it off the P/S pulley. Patience, tools, magic words.
I am giving the car to my son. I want it to be in the best possible condition and not have him worry about maintenance /repair items too soon. Having said that how long is this serpentine belt good for?
I also have a whirring sound when I start the car and it continues for awhile after I shut down the engine. Sounds like some pulley freewheeling? Any thoughts?
I also have a whirring sound when I start the car and it continues for awhile after I shut down the engine. Sounds like some pulley freewheeling? Any thoughts?
Where is the whirrr located? Engine compartment, cabin, trunk, under the rear? Fan noise?
I doubt you'll get much good Buick info in these Cadillac forums.
I doubt you'll get much good Buick info in these Cadillac forums.
The whirring noise is coming from the engine compartment almost like a rotating pulley bad bearing or bushing.
So i'm thinking idler pulley, tensioner pulley, ac compressor. I do not suspect the alternator as I have replaced many and haven't heard anything like this from an alternator. It's like the whirr of a jet engine taking off. I asked questions on this forum because of the Cadilac Northstar Engine 4.6 L
So i'm thinking idler pulley, tensioner pulley, ac compressor. I do not suspect the alternator as I have replaced many and haven't heard anything like this from an alternator. It's like the whirr of a jet engine taking off. I asked questions on this forum because of the Cadilac Northstar Engine 4.6 L
Normally the Northstar cooling fans do not run after engine - OFF except if the engine is seriously overheated. Otherwise they run in SLOW if the coolant gets to 224 degrees; FAST at 236. The fans run in SLOW any time some A/C compressor function is set and usually don't run at over 30 mph - not needed.
Or something is causing the AIR blower to run all the time - but it's only supposed to run for short periods at cold start to quickly light off the cat.
A pulley would not be heard for more than 3 - 4 seconds after engine - OFF if the belt had any tension at all.
Does a Buick Northstar install use an electric coolant pump?
Or something is causing the AIR blower to run all the time - but it's only supposed to run for short periods at cold start to quickly light off the cat.
A pulley would not be heard for more than 3 - 4 seconds after engine - OFF if the belt had any tension at all.
Does a Buick Northstar install use an electric coolant pump?
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