Question about 1994 Lexus Es 300

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Why does it continue to over heat even after changingth cylinder head gaskets?

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Overheating can be caused by a few different things such as the fans not going on, the thermostat being stuck closed, or blockages in the engine due to deposits (which can be resolved by flushing the cooling system).

If the head gasket was changed this could indicate that the engine overheated due to another problem that caused this.

Posted on Oct 05, 2010

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Posted on Jan 02, 2017

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2 Answers

If my head is blown will my car still try too turn over


yes
water in cylinders may prevent the cylinders from igniting the fuel
the starter motor will try to crank the engine over

yes
could have exhaust vapor build up in cooling system and then blow the hoses off the radiator

Yes
Could have water leaking into one cylinder and then getting heated in cylinder and being exhausted as steam out exhaust pipe. losing water over time . over heating engine eventually.

Could have a cracked head or warped head also if engine was over heated.

A compression test will confirm if blown head gasket.

Jul 08, 2016 | Cars & Trucks

1 Answer

WHAT COULD CAUSE OVER HEAT AND CRACK THE CYLINDER HEAD?


normal result for heads that are overheated
what causes it
heat differences in sections of the heads causes cracks, bad design of the cooling ducts in the head , pouring cold water into an over heated engine without the engine running to circulate the water
prevention si better than cure so check the radiator level at least weekly

Jun 01, 2016 | Cars & Trucks

2 Answers

What is causing overheating?


Check your oil dipstick. If there's a grey/creamy sludge on it that means water is finding its way into the oil system. Your cylinder head gasket/cylinder head is faulty.

Fill your coolant bottle. Leave the top off. Start the engine and watch the coolant level. To begin with, you will see air bubbles escaping. This is normal. If bubbles continually appear or the coolant level 'shakes' violently, this indicates that exhaust gas is finding its way into the cooling system via a cracked cylinder head/faulty head gasket. Also look at the exhaust gas - is it clouds of white? If so - that's steam from water being burnt in the engine - a head problem.

Over heating is a sign of a cracked cylinder head/faulty head gasket.

The other causes of overheating includes a stuck thermostat or a leaking/blocked radiator.

If there's no sign of a coolant leak underneath your vehicle - suspect the cylinder head gasket

Mar 03, 2016 | 2006 Opel Corsa Utility

1 Answer

Over heating


Hi. I assume that you already checked the thermostat valve. I believe that you have a beginning of head gasket problem or a small crack somewhere. The best test for head gasket, even being a time consuming test, is to remove all spark plugs, fill up the radiator, put one cylinder at top dead center, which means the cylinder is in explosion position, install a cylinder leak test hose attachment (from a cylinder leak tester that you can purchase a Harbor Freights) and connect a compressor hose. Observe if air bubbles comes from the radiator. Sometimes it takes longer to show up so be patience. I've had an Honda Civic that was taking over 5 minutes to shows bubbles. If it does, your head gasket is beginning to get bad. Good luck.

Dec 31, 2013 | 2002 Land Rover Discovery Series II

1 Answer

5.3 liter Chevy engine #1 Cylinder not firing at idle


My opinion...

Year? Miles?

There's no way I'd dive into a "HEAD GASKET"
diagnosis without pressure testing the cooling
system and (wet/dry) COMPRESSION testing
the whole engine...

Even if it is a "HEAD GASKET"... the entire engine
might be ready for a REFRESH... and tossing a new
Head gasket into a TIRED ENGINE not insubstantial
(a lot of wasted time & money)...

Come back with some compression numbers...

but don't bother with any of this if your engine oil has water in it.

(in my opinion)

Carnac the Magnificent

Apr 04, 2017 | 2005 Chevrolet Silverado 1500 2WD

1 Answer

Car over heats both fans working and i have a new thermostat.Even checked water pump to make sure it's ok. very frustrating1!!!!!


Flush coolant system out. If this does'nt help check for white smoke coming out of exhuast while its running.White smoke from exhuast would mean that coolant is getting into one or more of the cylinders,which would mean more than likely a blown head gasket.A blown head gasket would cause it to over heat.If you are loosing coolant and don't no where its going would be good sign that its blown.You would need to proform a leak down test on each cylinder this would let you known which cylinder is the problem.

May 01, 2011 | 2006 Chevrolet Equinox

1 Answer

I need take out cilinder head from nissan 1985 2.4 becuse the head gasket are burne out


Check this about Cylinder Head Cover - REMOVAL & INSTALLATION procedure...

1. Remove the air cleaner assembly.
2. Disconnect the PCV hose(s) from the cylinder head cover.
3. Remove the nuts and washers. Lift the cover off the cylinder head. Cover the oil return hole in the head to prevent dirt or objects from falling in. Remove the gasket.

To install:

4. Replace the cover gasket if it shows any signs of damage, breaks or cracking. Tighten the nuts evenly, reconnect the PCV hose and install the air cleaner assembly.



continue...

Apr 13, 2011 | Nissan Pickup Cars & Trucks

2 Answers

Using water and water coming out of the exhaust and steaming and temperature rising


STEAM COMMING FROM THE EXSAUST PIPE IS A BLOWN HEAD GASKET, WHAT HAPPENS OVER TIME THE ENGINE HEATS AND COOLS AND THINGS EXSPAND AND CONTRACT AND THE COOLING SYSTEM WILL WEAR A HOLE IN THE HEAD GASKET OR IN BAD CASES THE HEAD IS CRACKED IF THE ENGINE IS RUN FOR A LONG TIME OVER HEATED

Sep 12, 2009 | 1995 Toyota Camry

1 Answer

What would cause my cylinder head to crack on my 4.3 2000 Envoy?


The cylinder head is a crucial part of all combustion engines, and cylinder head cracking can result in catastrophic damage to the engine. In some cases, cylinder head cracking may result in such severe injury to the engine that it must be replaced. As a result, most motorists try to prevent cylinder head cracking, as an ounce of prevention in this case is worth many pounds of cure. The causes of cylinder head cracking are all relatively simple and easy to prevent, except in the case of mechanical parts failure through no fault of the operator. The cylinder head, used in combination with a head gasket, seals the cylinders of the car, along with other parts associated with them. The cylinder head is customized for the vehicle, and has very precisely milled surfaces to provide a smooth and flush fit with all connecting parts. In the case of a minor crack, the cylinders may lose compression and misfire. Major cracks can cause severe damage to the cylinders of the engine. For this reason, when replacing either the cylinder head or the head gasket, make sure that you are using the correct parts, including bolts, for the job. Even a brand new car can experience cylinder head cracking if parts have been installed incorrectly or if there are weaknesses in the metal. Especially in the case of a vehicle which is still under warranty, drivers should contest the cylinder head cracking with the dealer. Be certain to inspect any vehicle before you purchase to check for weak spots in the metal or incorrectly installed components. This includes the cylinder head gasket, because improper installation of this vital part can cause cylinder head cracking. Cylinder head cracking has become more common as car manufacturers use mixed metals in their engines. Many vehicles, for example, have a solid cast iron engine block but an aluminum cylinder head. These two metals expand at different rates, and this can lead to cylinder head cracking. The most common cause of cylinder head cracking is overheating. When a vehicle overheats, it puts stress on all of its metal components, including the cylinder head, which is often at the center of the heat. This can cause the head gasket to fail, which may lead to cylinder head cracking as the components warp and pressure begins to leak. All drivers should properly maintain their vehicles to prevent overheating. Many drivers mistakenly pour cool water into the radiator when their vehicles overheat, in an attempt to bring the temperature down. This is not a good idea, because the rapid temperature change will cause cylinder head cracking due to thermal stress. In a case where the cylinder head survives overheating, the driver may inadvertently destroy it by trying to do good. To prevent overheating, make sure that your radiator is filled and in good condition, with a tightly sealed cap. Check to be certain that your engine thermostat is in good working order, and accurately reflecting the temperature. Make sure that you have no leaky belts or stretched hoses, and that the fan is working effectively. If your car does overheat, stop, turn off the engine, and allow it to cool completely before adding water. Cylinder head cracking can also be caused by localized hot spots in the engine, which usually represent a failure in some portion of the cooling system. Always make sure that hot spots are addressed, particularly if your head gasket has failed and required replacement recently. Hot spots are often caused by uneven expansion of engine parts, leaky hoses, and pre-ignition in the cylinders of the engine. If your car has overheated, check the cylinder head and gasket for signs of cracking or warping. If the cylinder head has warped even slightly out a flush state, it will cause cylinder head cracking. In this case, the head gasket may need to be replaced and the cylinder head should be ground even again before it cracks. Thanks for using FiXya - a FiXya rating is appreciated!

Jan 21, 2009 | 2000 GMC Envoy

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