Question about 1999 Buick Park Avenue

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What to do if i have flushed radiator and refilled w/antifreeze and also changed out the thermostat and still running hot please advise

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It could be a couple of things, it might be the thermostat switch on the radiator that controlls the cooling fan on radiator, it could be the cooling fan itself, make sure you check the fuses to the cooler fan to hope this helps a bit

Posted on Feb 03, 2010

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2 Answers

Recently had a new water pump fitted to my jeep Cherokee but it's still overheating and the heater in the car doesn't work. Any idea what might be causing this


if no leaks in hoses, then flush out the radiator etc, there maybe a plug up in system. also change thermostat. God-Bless! and hope this helps you.

Apr 24, 2016 | Jeep Cars & Trucks

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Why isnt heat working?


yes that is very possible but if your truck did not overheat before this it is doubtful. make sure you did not put the thermostat in backwards. if you flushed out the system did you force any air through it to blow out old antifreeze? if you did, this may have broke some stuff loose in your heater core and plugged it up . it could also be air locked, if the system was completely empty and you refilled it . turn your radiator cap half open (not all the way open ) so it is still locked on but not tight and run your vehicle for a while to burp the air out of the system . add antifreeze if needed after this .

Dec 08, 2014 | Cars & Trucks

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Heater not blowing hot air


air in the system. or dirty blocked radiator and heater cores. put a radiator flush in it. run it for 20 miles then drain it. refill with 50/50 mix of antifreeze .now bleed it. this is done by turn your heater on full.with the expansion bottle cap off .run the engine till water getting hot . with finger and thumb push in the hose to push air out of the radiator hose into the expansion bottle .then refit the cap.

Dec 21, 2013 | 1998 Ford Expedition

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Instructions on how to use holts wondarwald


Holts Wondarweld
Flush engine.
EXTERNAL CRACKS
1 Run engine until hot,drain off enough coolant to remove thermostat.
2 Remove thermostat.
3 Mix contents of can thoughoughly! and pour contents into thermostat opening.
4 Replace thermostat cover.& fill radiator with hot water,replace radiator cap.
5 Run engine at a fast idle for 15 mins,dont allow to boil.Top up if necessary.
6 Leave Wondarweld in system for 2-3 days then drain off,flush system replace thermostat and refill.
HAIRLINE CRACKS
1 MIX thoroughly and pour into cold engine (radiator if it has a cap)
2 Run engine until hot.
3 Allow engine to cool then run again until hot.
4 Follow procedure 6 above.
INTERNAL CRACKS
1 Follow external crack instructions except after pouring Wondarweld into engine remove spark plug from
affected cylinder and run engine for 20 mins. If more than one cylinder affected run for 5 minute intervals.
2 Allow engine to cool then drain cooling system and refill with clean water.
3 Drain sump & flush,refill with fresh oil.
Note:- 1/2 pint of Wondarweld for every 6 pints of water,DO NOT add antifreeze for at least 3 days after process.

Aug 05, 2012 | Cars & Trucks

1 Answer

1990 toyota pickup is running hot and when i shut


Try with the small stuff first. Replace the thermostat. Before you do that, you should flush and refill your system with just water after the flush process. The bottle of solution that you put into your radiator to flush it and clean it has instructions, follow those. Then let the car cool down and drain the system and refill it with fresh water only. Run this water for a bit and then do it once more. Once cooled back down , replace thermostat and replace the 50/50 mix of antifreeze and water.
Check engine oil level as well, low oil will overheat engines quickly.
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !!
NEVER REMOVE THE RADIATOR CAP ON A HOT ENGINE. !!!

Aug 06, 2011 | 1990 Toyota Pickup

2 Answers

Found rust like material in water system change radiator and water pump thermostat .flushed system numerious times car still runs hot and water is still a rusty mess.


You may have to flush the system again. Did you use a commercial flush such as Prestone Super Flush? Plain water won't remove the rust and sludge. The Dex-cool antifreeze that GM recommends for their cars is bad about forming a gummy sludge in the cooling system. It clogs radiators and heater cores. I would suggest another flush with the Prestone product. Follow the directions closely for best results. One thing that will help is. after you drain the radiator, refill with clear water and let the engine run until the coolant is circulating good, then drain it again. Do this three or four times. This will ensure that all the antifreeze has been removed from the engine block. When you refill the radiator, use a green antifreeze that is compatible with aluminum radiators and aluminum engine parts. Do not use Dex-cool. Dex-cool can also cause the intake gaskets to fail. Make sure the new thermostat is at least a 195degree unit and that it is installed correctly. you would be surprised how many thermostats get installed upside down. After refilling the radiator, leave the radiator cap off and let the engine run until the coolant is flowing. Keep adding antifreeze each time the coolant is pulled down into the radiator. Use full strength antifreeze because the water that is retained in the block will dilute it. A 50/50 mixture won't protect below freezing.

Dec 27, 2010 | 2003 Buick Rendezvous

1 Answer

The antifreeze reservoir is full and doesn't hasn't fluctuated, yet the vehicle is getting very hot and smokey smelling. the pressure gauge doesn't reflect overheating butts clear at the antifreeze isn't...


is the water pump working and circulating the antifreeze. if it is working, I would flush out the system and replace the thermostat before refilling system. you can buy radiator flush at any auto parts store. you can back flush system through radiator. just follow directions on back of flush bottle. have a good one!!

Nov 10, 2010 | 1999 Plymouth Voyager

1 Answer

2004 cheverolet impala 3.4L engine - Started running hot. Had never changed antifreeze, bought a flush and refilled with antifreeze. Ok for several weeks, started running hot again. Replaced the...


Sounds like you have an air;lock in your cooling system.Try placing a bleeder on the return hose to the heater core ........looks like a small tap

Aug 18, 2010 | 2004 Chevrolet Impala

1 Answer

My car is overheating. I just replaced thermostat and recently replaced the water pump. I checked for water leaking but dont see any. What could it possibly be


If the thermostat and pump have been replaced, it's most likely the radiator. They corrode after time. Try flushing the antifreeze (not just draining and refilling it, but flush the system with clear water.) Most auto stores, Walmart, etc. carry the flush kit for very little $$. Once it's flushed, refill the system with the correct ratio of antifreeze.

If the problem persists, then it's most likely gunk in the radiator. Auto shops can boil them clean.

Short of all of the above, overheating can also be caused by a cracked cylinder head. If it overheated too bad at any point, it can crack the head and will continue to overheat regularly. Check for antifreeze in the oil. If there "is" antifreeze or water in the oil, the head is most likely shot (and yes, it will still run that way).

Jan 25, 2010 | 1987 Cadillac Brougham

3 Answers

My 1998 oldsmobile sillihouette runs hot when i sit for a while. I've replaced all the fuses. Please Help...


You may just need to service the cooling system. The antifreeze has a life expectancy and needs to be changed after a few years. If it's green antifreeze it should be changed once a year or 30,000 miles with  50/50 mix and if it's the orange antifreeze it's good for 5 years and 150,000 miles before replacement with a 50/50 mix. You need to flush the cooling system out and replace the antifreeze and you may also want to replace the thermostat which can be un pleasant if you have larger hands. The thermostat housing is under the throttle body and if you have the right tools and small hands you can remove it with out taking the throttle body off. If you do decide to change the thermostat, replace it with the fail safe thermostat just to make sure your not stuck on the side of the road. Good luck and hope this helps, keep me posted. Be glad to help and do not use 100% antifreeze, it will just gel up and you'll still over heat. 

Jun 23, 2009 | 2001 Oldsmobile Silhouette

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