Question about 2000 Buick Regal

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I have a 2000 buick regal gse it has a 3.8 l engine with a supercharger Im trying to drain the radiator to flush it out and add new antifreeze Im having trouble with the pitcock valve any suggestions

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Bruce Silvernagle

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Dont bother with the Pep/Pipcock. Simply remove the hose on the radiator near the water pump. Also pull off the thermostat hose and Thermostat (Buy a new one with seal) Flush it with water till clean. (The block and radiator) Those valves can and DO break. Then you'll need a new radiator. After all is said and done. That brass bolt is the air bleeder on the Thermostat neck.

Posted on Dec 25, 2016

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What size socket does it take to drain the radiator on 3.8 buick regal gse


I wouldnt even bother cause of the issues you can have. Simply remove the lower hose and drain it. Also take off the thermostat hose and thermostat. Flush system from the block there. That brass piece in the bleeder on the thermostat neck. So next attach bottom radiator hose. Fill the block with fluid and put in new thermostat and seal. Install the hose and neck. Fill your radiator. Start it up and add as needed. TURN Heat ON! Once its up to operating temperature with cap back on. Also fill your overflow to the line. Bleed out the air afterwords. Total time is 25 minutes. You never said the year but I'm guessing a 2000ish.

Nov 30, 2016 | Buick Regal Cars & Trucks

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How do I get to pet cockon 1991 sky lark buick


You may not have one. Just remove the bottom hose, or remove the engine drain plug put a garden hose in your radiator idle the engine while adding water this will flush your whole system. let the car cool replace engine plug add your antifreeze and your set.

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My 2005 Buick terrazza has barely any heat at all. Tries to throw a little warmth while my engine is running at half temp sometimes just over! What do I do? Was told by the dealership in parts and sai


drain radiator of antifreeze then add some caustic soda about 200 grms dissolved in a bucket of warm water ,pour this into the rad top up with water and leave engine on idle for half hour ,drain -flush and run engine and see if its any warmer ,if it is the drain water again and give a good flush then refill system with 50% antifreeze

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1 Answer

Where is the drainedge for the radioter


For a 2001 Buick Regal GS 3.8 Liter, Supercharged engine:

First, let engine cool some. Second, locate small drainage hole at the bottom left/drivers side, of the radiator. From the bottom of this small drain hole, go straight back toward rear of radiator, then up about 1 1/2 to 2 inches up. (Have a drain pan or pail handy, to catch the old antifreeze.) You'll find a dark colored drain nut. Use a larger, correct sized socket ratchet wrench & loosen this fitting a turn or so, counter clockwise. Old antifreeze will begin to come out the bottom drain hole. The more you loosen the fitting, the faster the fluid flow out. I wouldn't remove the drain plug completely, or you'll loose control of the draining flow rate.

I just changed my anti-freeze just last week. I also changed the 2 large radiator hoses & smaller 2' overflow hose at the same time, as long as I was doing the job. They had never been changed before. I also used new hose clamps & a small packet of "radiator hose grease", from Autozone.. I drove the car up onto front car ramps to make it easier. I used safety jack stands for extra care. " You-Tube" shows some, "how to videos", that are helpful.

The old hose clamps are difficult to get to. (You'll need a few tools, some time & patience.) To get to the upper clamp, near the right/passenger side of the of the car, near the battery, I removed the outer serpentine belt & tension pully. I then removed the factory installed spring tension clamp, with the help of an adjustable battery pliers. The bottom of this hose wasn't too bad to get to. On the left/drivers side of car, remove black air intake box to access upper clamp. Remove the black metal brace bar, the will allow access to the air intake black box.

I also changed the small overflow 2 foot long hose & 2 clamps, that goes from radiator cap area, back to the overflow white plastic tank, close to passenger firewall. I removed the overflow tank to clean it out as well. I drained the fluid & changed the 3 hoses & clamps. I then placed all removed parts back where they belong, including white plastic overflow tank, tension pully & outer serpentine belt, air intake black box & metal diagonal brace, contacting air intake box. I flushed the system with some Prestone Radiator Cleaner & clean water. Start car & get up to temp., then run for about 10 minutes. Let cool, then drain again. I flushed my car at least 2-3 times after this, until the drain water ran clear.

The best price on a 5 year/150,000 mile anti freeze, came from Wal-Mart. I then mixed about 50/50 with Distilled water, as suggested on the bottle. All went well & no leaks! I took my time and did a thorough job. Good luck!

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2 Answers

Where is drain plug on radiator so i can flush the radiator.


If you want to flush the raditor remove the big hoses, don't worry with the drain plug as you can't flush it good enough with the drain open anyway. If your just changing the fluild you can drain it and fill it but thats not flushing it. remove the therostate too and flush the engine and remove the heater hoses and flush them too. As you may not know what kind of antifreeze is in the motor now you need to get all of it out as some kinds of antifreeze don't mix and make a clogging slime instaed of good coolant. Do it right or take it to a shop that will.

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I have a 1998 Buick Regal supercharger that is leaking antifreeze under the engine. What are the possible causes and repairs?


I would start by checking the water pump. Look at the bottom of it and see if coolant is running down the front of the engine from the hole in the bottom of it. If that appears to be okay look at the sides of your engine. There are 3 frost plugs on each side about halfway between the oil pan and the heads.They will occasionally rust out and leak too. I assume that you have already checked the obvious rad hoses and radiator for leaks. Hope this helps.

Oct 29, 2009 | 1998 Buick Regal

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