Question about Lexus LS 400

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1995 ls 400 have replaced water pump ,radiator,thermostat , reaver cap.I have no water in oil and it doesnt smoke .burped the system . Is their ports that could be clogged preventing water flow ?

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Check Compression on cylinders looking for a bad head gasket. Look for bubbling in coolant and check spark plugs for residue. Check exhaust for steam.

Hope this helps?
1995 ls 400 have  replaced water pump ,radiator,th - 26229327-wbjtasehhf1ryoyttao3q0tt-1-0.jpg

Posted on Jul 01, 2016

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1 Answer

2002 Escalade. Changed thermostat, radiator, water pump, burped the hoses. Lower hose ice cold, upper hose hot. No heat. Any suggestions?


Did you put the heating on inside the vehicle to maximum when you burped the system? Sound like you still have an airlock. Run the engine to full operating temperature with the radiator cap off. I have also seen people do this with the reservoir cap off and didn't know where the radiator filler was.:>)

Dec 10, 2017 | Cars & Trucks

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I have a T reg Peugeot 106, the temperature light keeps coming on even thou I've topped the oil up. Any info plz


Topping up the oil has very little bearing on engines overheating.

You need to remove the radiator cap and top up the cooling system with anti-freeze and water mixed to specifications. Note that I mention RADIATOR CAP and not the expansion reservoir cap. Remove the radiator cap with the engine COLD. Once you have filled the radiator, you need to run the engine until it gets to full operating temperature. Some of the water will overflow out until the thermostat opens, then the water level will rise and fall. When it has settled, bubbles have stopped, turn the engine off, top up one last time. Replace the radiator cap and then top up the reservoir tank.

There are videos online, Google 'burping cooling system', and look at the images tab. Here you go.

http://www.bing.com/videos/search?q=%27burping+cooling+system%27&FORM=HDRSC3
burping cooling system Bing video

Jun 02, 2016 | Peugeot Cars & Trucks

1 Answer

Will an air pocket in the coolant system cause it to overheat or over pressurize on a 2001 Nissan Sentra ?


1. The radiator cap if working correctly it will release pressure in the system provided the cap you have is the correct pressure setting. If you are having a problem with pressure then replace the cap with a new radiator cap with the correct pressure setting. Do not use a cap with a pressure setting other than the original equipment pressure spec. So you do not go to the parts store and buy any radiator cap on the shelf that fits because they come with different pressure ratings and some of these will be totally unsuitable for your car.

2. If the pressure valve is stuck in the "old" cap the pressure release system will not work.

3. Overheating
Air pockets in the cooling system can definitely cause overheating and can retard coolant flow through the system. If you are draining the radiator to replace the coolant or replacing the radiator you need to follow the correct procedures for bleeding air out of the system for that particular engine after coolant refilling. Some engines have bleeder screws on the cooling system to assist in the air bleeding procedure and some don't.

There are various causes for overheating so don't assume it will necessarily be solved by bleeding any remaining air from the cooling system and replacing the radiator cap with one that works.

Other causes can be...........
1. Faulty cooling system thermostat. (Replace the Thermostat)
2. Faulty water pump, especially if the impellers have corroded away or have disintegrated in the case of those design genius water pumps with plastic impellers. (Replace the water pump)

3. Cooling fans not working and if so the cause needs to be tracked. Check that your fans are kicking in. If the engine is overheating the fans should be running because they will switch on when the coolant reaches a specific temp and well before the coolant gets excessively hot.

4. A partial blockage in the coolant passages inside the engine but not in the radiator if you have a new one. If the coolant is not changed at the required intervals(frequently the case with many owners) or is over diluted with water you can get a build up of debris. If products like stop leak have been used in the system this can create similar problems with partial blockages inside the engine coolant passages.

5. A compression leak into the cooling system.
If you have bled air from the system and have continuous air bubbles in the cooling system I would suspect a compression leak. In that event a basic leak down test will show if you have compression gasses leaking into the cooling system and from which cylinder(s). The spark plug is removed and compressed air is forced into the cylinder via the spark plug fitting and air bubbles will show up in the coolant of there is a leak into the cooling system.
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Have the problem with overheating addressed immediately. Running the engine with an overheat condition will cause expensive engine damage many times the cost of fixing the overheating issue.

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Dec 29, 2015 | Nissan Cars & Trucks

1 Answer

How do you burp the cooling system replaced t stat and water pump still over heats


Start the engine with the radiator cap off. When the thermostat opens the water level will drop. Keep adding water slowly till it takes no more water and then cap to pressurize. Also fill the excess tank to recommended level marking on side of tank.

Jun 22, 2015 | 2001 Lincoln Continental

1 Answer

I have changed the thermostat and car still runs hot


It could be that your cooling system wasnt properly burped which is getting all the air bubbles out.
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gm tech 2

Apr 15, 2013 | 1995 Chevrolet Lumina

1 Answer

93 chevy cavalier 3.1 over heating and heater blows cold, new water pump, thermostat, rad. cap, flushed the radiator, drilled a small hole in the edge of the thermostat, no water in oil and it doesnt...


had a similar problem myself. wound up being the radiator having a restricted flow in spite of being flushed and cleaned. also have you checked to make sure that your cooling fan is functioning properly? also your cooling system could possibly be airlocked, but i doubt it. i would be willing to bet that it is either your radiator not flowing properly. hope this helps out.

Oct 20, 2012 | 1993 Chevrolet Cavalier

1 Answer

I have a overheating issue with my blazer. It has a 4.3 liter vortex engine, I replaced the thermostat, water pump appears to be working. Anything else I should look at


take cap off of radiator and crank motor wait for it to get to operational heat and watch in cap to see if thermostat is opening,you will see water circulating threw radiator if this doesnt happen then water pump is not working you might also flush radiator out

Jul 06, 2011 | 1995 Chevrolet Blazer

1 Answer

I have a 2003 lincoln ls it keeps running hot I replaced thermostat, radiator cap, water pump,and had lines drained. After replacing water pump and thermostat car ran fine for a month I went and got an ol...


Suspect you have a loose clamp on a radiator hose or the oil change guy made something leak. There is a tool which is similar to a a bicycle pump in that it pressurizes the water system and your engine does not have to run or be hot to test. Some major auto parts stores may have a loaner.

Its going to stay hot and lose pressure until you fix the leak.

Jun 29, 2017 | Lincoln LS Cars & Trucks

2 Answers

My heater blows cold air when car is stopped. i have installed a new water pump and the radiator is full of water.


you still have air trapped in the cooling system. Get front of car as high up as you can on a hill. Cold engine - loosen radiator cap, fill with 50/50 antifreeze mix. Start engine and run until upper radiator hose is hot (thermostat open). Engine should burp air and maybe spill some coolant, that's ok. Once burped, tighten cap, shut off engine and let it cool down while keeping the reservoir full. It will **** coolant out of reservoir as it cools. Keep it full.

If still cold air, take to a shop that has evac/fill equipment; they will **** air out and repalce with coolant. About $80.

gerry

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3 Answers

1996 328IS, Over heating after 25 minutes of idling,


clogged with old rad chunks
no white smoke

Sep 05, 2009 | 1997 BMW 328

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