Question about 1991 Toyota 4Runner

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How do i know if my head gasket is blown

The thing overheats and has some electrical issues. Got it for free and want to trouble shoot this thing.

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Yes that is for it to be leaking on the exhaust side and crankcase side but it also may be leaking on the exchaust to water jacket side also check this by visually inpecting for bubbles and exhaust fumes in the radiator. do not take the cap off while engine is hot do so only when cool and only run the motor until the thermostat opens and you see the water circulating and if it has exhaust smell or excessive bubbling or oil you have a problem.

Posted on Jan 04, 2013

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One way is if there is what looks like steam coming from the exhaust.

second open the oil cap on the engin, look just inside, the oil may be mixed with water it will look thick almost like a paste light brown in color, or if you see water drops in there.

Posted on Jan 04, 2013

  • J. Coleman Jan 04, 2013

    There is no water in the milky cap or milky dipstick....I am looking for steam out of the tailpipe for steam now....that means it is blown from where? I am curious if there is no water in the cylinders...where does it go>

  • TARA Jan 04, 2013

    water or steam out the tailpipe does not indicate a blown head, you will always get some steam or water dripping from the exhaust due to condensation. 1st monitor your water level. 2cnd park it on pavement and let it run awhile look under the truck and see if there are any puddles if there is trace them back to there origin. 3rd replace your radiator cap (common on toyotas) and/ or thermostat if it overheats or spews fluid out the radiator overflow., a long shot would be to back flush the system in case the water poath has become obstructed. if you find oil in the radiator or stuck to the sides of the overflow reservoir or smell exhaust in the cooling system or water in with the oil take it to a professional because of the amount of precision work tht needs to be done on a blown headgsket.



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Posted on Jan 02, 2017

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SOURCE: blown head gasket

Look the engine over and see if you can find any external leaks, change the thermostat and make sure that fan(s) are operating.
Check the oil for water...loosing that much, it has to show up somewhere. Blown headgasket usually puts oil in coolant or coolant in oil, causes an external leak from between head and block or goes out through the tailpipe as steam.
look carefully and you will find your problem!!

Posted on Apr 27, 2009

  • 1 Answer

SOURCE: 1993 toyota 4 runner head gasket

I've had mine blow twice on the EFI 3.0 engine. Toyota came with a beefed up gasket. Make sure that is the one they are using.

Posted on Oct 13, 2008

  • 94 Answers

SOURCE: blown head gasket on a 1983 toyota tercel

The head bolt torque is 48ft. pounds and the camshaft bolts are 16ft. pounds thats for a 1.5L S.O.H.C motor.

Posted on Dec 04, 2008

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SOURCE: 1990 Toyota Pickup Head Gasket

the recall v06 was not for that year

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SOURCE: blown head gasket

copy and paste this link...cheers

Posted on Jan 05, 2010

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1 Answer

I've replaced the water pump,thermostat, and hydraulic fan that was barely moving on Lincoln ls 3.0 v6 but still continues to overheat.Removed tstat just to get home.Why would it still be overheating?

There are usually only three major reasons why cars overheat. The first is a water flow issue. You have make attempts in that area with the water pump and the thermostat. The second is an air flow issue. You addressed that with the fan. The third is an engine malfunction issue, such as a blown head gasket or worse.

There are still a few things you can check..first, the radiator itself could be clogged up, restricting water flow. Second, verify that there is nothing restricting airflow through the radiator such as dirt, bugs, debris, etc. Also, ensure that any fan shroud that should be in place is there and properly installed. These can cause lack of air flow through the radiator. Last, have the engine checked for a blown head gasket.

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You have blown the head gasket. Also, you may have warped the head if it's aluminum which will happen due to ignoring the issue of overheating...which eventually caused the "blown head gasket". So, it sounds like you have 2 issues to resolve. 1) Why was it tending to overheat? Stuck thermostat, water pump issue or??? 2) Repairing the cylinder head or replacing it if warped badly, if your lucky it's just a blown head gasket. Allowing a overheating vehicle to be in service without solving that the overheating can lead to MANY other expensive problems.

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My 2003 Ford focus blew a head gasket a while back. I got fixed that, changed out the water pump, thermostate, water resevoir, and a few hoses. It started to overheat again, but the thermostate wasn&#

If you got a blown head gasket, water is getting mixed with your oil, pretty much ruining it, and your oil's viscosity will be affected, causing oil pressure to drop and your light turns on.

How do you know your car is overheating if it's not showing in your gauge?

When replacing blown gaskets there are a few things that is best to do, like sandblasting the heads, clean, scrape block and use proper torque an sequence, only removing old gasket and placing new ones won't fix the issue, those gaskets go through extreme conditions, expansion, temp changes, etc, they need to be put mindfully. I mention this because it seems you changed a lot and ended up with the original issue...

If your gasket is blown you need to fix that asap, then identify where is your coolant leak/blockage that causes alleged overheating, doing a coolant flush might help. Good luck.

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IF it was any gasket issue you would be losing coolant or getting air into the coolant, usually causing it to overflow. You have not said any of these things, so I would suspect this is an issue with the fluid not moving through the engine, either because it is blocked, or because the water pump is not moving it.

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What could be a reason for a truck overheating?

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One thing certain though....repeated overheat and continued driving in overheat condition will result in an expensive failure (blown head gasket, cracked cylinder head or crank bearing damage).
Carefully check each item I've listed and correct whatever it is you find, then resume using the vehicle.

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Car heats up very quickly no end in site

there are a number of things that can cause a car/truck/suv to overheat! #1. bad thermostat. #2. partially clogged radiator. #3. faulty radiator cap. #4. bad clutch on fan,or bad electric fan,or bad fan relay. #5. blown head gasket. These are the most common among all types of vehicles,I did notice you said "quickly" overheats. If the car is totally cold and overheats within 3-5 min of starting up, that is a pretty good tell-tell sign of a blown head gasket. if it takes a while longer to overheat,check the other items i listed.( always start with easyer and cheeper items first and work your way up from there) hope this helps ya out....yz-maniac.

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Overheating when driving no mixing of the coolant and oil

The three most likely thing's cause overheating are faulty thermostat,electric fan or clogged radiator. Only at has been overheat so much it boils dry that it will cause engine trouble. Most common problem's are blown cylinder head gasket or a cracked cylinder head.
mixing coolant and water depends on where the gasket has blown or head is cracked. You will first need to check if it actually is overheating. The reason is. If the head is cracked or gasket blown then you can get a false boiling which is compresion from the cylinders blows through the crack in the head or gasket causing the coolant to blow out of the radiator cap.Fill the radiator to the top leave the cap off then start the engine.If the water blows out then you will need to remove the cylinder head check the gasket is ok. If its damaged replace if not get the head checked for crack's. If no water blow's when you start it check the thermostat is working properly. To check the thermostat put it a in a saucepan cover it with water bring the water to the boil. It should open before the water boil's but near boiling-point. If its ok then start the engine again leave it running until it boils and check the fan is running. If that's ok then its radiator problem. Their is no way to check if the radiator is ok you will need to get a new one. One last point. If the cylinder head or gasket are faulty it was caused by overheating so by just fixing the cylinder head problem is not a cure it will overheat again. Check the three things I mentioned at the begining and told you how to check them. Hope this help's. Cheer's

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