Question about 1992 Daihatsu Charade

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Oil getting into radiator/cooling system

I have had the head serviced and gaskets replaced etc. I thought this may solve the problem of oil into the cooling system. Has any one seen this problem before. 150kms of driving and tall the oil is pumped out of the sump and into the cooling system filling the expansion bottle. No water gets into the lubrication system, the oil remains clean all the time. Apart from that it is a mightyl little and goes really well.
Thanks for any help.

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  • rtiddy Oct 29, 2008

    i have 91 charade 1l 3cly manual same problem oil in radiator only have change block still same confussed, head been check , started after changing damaged radiator

  • Anonymous Oct 29, 2008

    update did run for 2 days with replacement block, radiator seemed fine, previous night changed tappet cover, thought pvc valve was causing rough idle, is idling better now but oil in radiator has increased substantially, theory is pressure in rocker area has increased now oil is forced between head bolt and head water jacket looks like head is faulty after all will try another, i do have a spear

  • balsunner Jan 17, 2009

    I have VB Bora 130ST PDI, withthe same problem, but I need to have it checked out, I spoke to some people and checked on the net, the common answer is the cooling unit, even VW would change the cooling unit first and if the problem still exist then they would change the head gasket. I hope its not a common problems with VW

  • Anonymous Jan 27, 2009

    i have a VW and am having a similar problem. there is oil (not sure if trans or engine oil) in the coolant bottle. I took it to be repaired the head gaskit was replaced, all seals were replaced and the radiator was said to be fine. after the engine was rebuilt the coolant light came on again and upon checking there was oil back in the coolant bottle. The mechanic is now telling me he thinks the block is cracked and needs to be pressure tested or i need a new engine. However some else told me its probably just the oil cooler needs to be replaced. I have no idea wat the real problem is and am spending tons of $ trying to get this repaired...any suggestions?

  • Anonymous May 25, 2009

    I have a diahatsu charade and have oil in the water system but the dip stick is free from water. Earlier this year i was looking at a charade from a registered dealer and that car had same problem nothing noticeable on test drive air con on and everything. No evidence of the oil until bonnet was popped and only because i saw oil residue on the bottle on the side of engine a mechnic from the dealership suggested that it could be a faulty thermostat amoung other things. I only realised i had the problem because of oil on the mudflap, the engine was not running rough or over heating no tell tale signs.



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The only way for engine oil to get into the cooling system at such a high degree is if you have a cracked block. even a blown head gasket doesn't allow that much oil into the coolant system. if the block was cracked it would be the water jackets around the cylinder walls. even a cracked head would not allow for this to occure. now if you don't have engine oil in the coolant but transmission oil instead via the trans oil cooler this would mean that the radiator has a crack in the tanks along the side where the coils of the oil cooler runs through it,(this only applys to vehicles that have an integral trans oil cooler). another thing that could occure is that the heads are cracked and the coolant is mixing with the oil in the upper oil galleys in the heads and then getting pumped through the intake into the bypass. if this were to occure your vehicle probably would not start at all and even if it did I seriously doubt it would stay running. You stated that you just had the head gasket replaced. well if the heads them selves were warped or the block deck was warped and they were not planed then a new headgasket would not solve the problem to begin with. My suggestion is to take it back to the shop you had do it and have them do it again because i believe someone screwed up because you did not have this problem before so the mechanic did not do something right.

Posted on Oct 05, 2008

  • Joe Austin May 23, 2013

    Ronald, I'm going to disagree with you. I'm working on an engine right now that has an oil cooler in the water jacket. The oil cooler is about 9" long and 1.5" wide and 1.5" high. The oil cooler is made out of aluminum and it corroded. Oil pressure in th engine is higher than the cooling system and oil leaks into and with the coolant. I've had to replace the radiator, heater core, and all of the rubber hoses. Then try to flush the oil/coolant mixer out of the engine. Lot of work and time involve. but the engine runs still very strong and there was never any coolant in the oil system.


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Well for oil to get into the water system, I would suspect the head gasket or the oil cooler (if you have one fitted it's located between the oil filter and engine). The fact the oil is migrating into the water would suggest a fairly high pressure source.

Posted on Oct 05, 2008

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On my kia sportage, top overhaul (inc. grinding , head skimming & new gasket changed) have solved the problem of engine oil leak and flow into the coolant system. tq

Posted on Apr 12, 2010

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I have Hyundai and have same problem, some times have some water in head engine, I checked head gasket, it is fine but there is a fine crack in the cylinder, so I think a cracked block make this problem

Posted on Nov 20, 2010

  • hhoffmann252 Mar 01, 2011

    I had the same problem, with a Charade (G102) CX 5-door hatchback (Australia) and eventually my mechanic found that the seals at the bottom of the cylinders were damaged. He took the engine apart and fixed the problems. $1400 later.


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On my sons car it has a feed from the oil filter to the radiator. Perhaps the radiator is allowing the oil into the water. Suggest check/replace radiator.

Posted on Sep 07, 2009

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Related Questions:

1 Answer

Oil in radiator but no water in engine oil

I have had this happen when cylinder head was warped causing oil under pressure to enter coolant. hope this helps.

Nov 21, 2017 | Cars & Trucks

1 Answer

My neon will not start replace heads and radiator frist

Signs of a Blown Head Gasket
Note: You can only truly confirm your suspicion by actually seeing the gasket, although precursor signs are usually evident.

Input from contributors:

If you see coolant leaking from the water pump, I would pressure-test it and pinpoint the leak and fix that first; oil seepage isn't necessarily abnormal.
Typical symptoms of a blown head gasket may include these: bubbles of air coming up into your radiator (remove cap before starting); a leaking radiator; milkshake-colored oil; overheating; rough running; coolant or oil running from head; spark plug(s) that have a green tint (if green coolant); white-colored or sweet-smelling exhaust.
White smoke from your tail pipe, or loosing coolant through your overflow. Take the cap off and rev the engine: if you see bubbles, or if it comes out, you'll know.
A blown head gasket will leave a dark smell in the radiator. And you will have high back pressure coming though your radiator cap.
Take your car to a radiator shop to have a detector installed: If the blue liquid inside a "bulb" turns yellow, you have a leak.
Beware that if you drive for too long and it overheats, a blown engine will be your outcome.
A blown head gasket can go out in different areas causing different symptoms. Do a compression test to give you some idea. Don't confuse low compression for a bad head gasket, though. A bad valve can lower compression. And a bad ring.
There are lots of clues you can look for. When in doubt and you have tried everything, have the head checked out by a well-established machine shop first, to see if the head was the problem. This way you're not wasting your time replacing the gasket.
My car once had a blown head gasket. I had a great deal of coolant loss. The engine lacked power and ran poorly. It had white smoke coming out the tail pipe. And it overheated very quickly. Also, it had water in the oil.
A quick way to check: Look at your spark plugs; if coolant squirts out, you definitely have a blown head gasket!
Low compression does not necessarily mean a blown head gasket, but it is a good indicator if there is a sharp drop in compression on one or two cylinders, with no drop in the others. Sometimes a blown head gasket will cause a whistling or wheezing sound, but not always. It will not always cause water to enter the oil - or oil to enter the water - but they are signs to look for. Overheating will almost always occur, due to the exhaust entering the coolant. Check your overflow bottle for exhaust smells. Watch for bubbles or overflow of coolant from the radiator while running the engine. Check for muddy gray-looking oil or bubbles on the dipstick.
Often (but not always), a blown head gasket will also cause deposit of water on a piece of cardboard held an inch from the tailpipe output while the engine is running (when this is happening, it is likely that the catalytic converter has been ruined and the muffler will corrode in short order as well). Sometimes drops of water will be seen dropping from the end of the tailpipe.
Another clue: Turn on the heater; often when the head gasket is blown an odor of antifreeze and synthetic rubber will emanate from the heater vents.
Many of the symptoms of a blown head gasket can be caused by some other problem in the cooling system, without the head gasket being damaged. Conversely, other problems with the cooling system can cause a blown head gasket and/or warped head. For example, a corroding radiator can send chunks of rust through the cooling system which take out the thermostat and water pump. If the thermostat is old, sticking and corroding, it can send those chunks through the system and take out the water pump or cause a blockage in the radiator, etc.
Radiator leaks can be the primary cause, or a result, of failures in other cooling system components.
Don't keep driving with the car overheated, especially if your engine has an aluminum head; you are likely to warp it. If it is warped beyond a certain tolerance, it cannot be planed and will have to be replaced when the head gasket is replaced.
One of the most common tell-tale signs is a milky-gray ring around your oil cap. When coolant enters the engine oil through a crack in the head or through a blown gasket, it evaporates and leaves a milky ring around the oil cap. Another easy way to tell is to check your oil dipstick. Change your oil and pull out the dipstick. Make sure that you take note of how far up the dipstick the oil is. Top off your cooling system and fill your cooling reservoir to the top. Screw radiator cap back on and start engine. Run engine for about 20-30 minutes or until it reaches normal operating temperature. Allow engine to cool (engine must cool completely to get accurate oil reading). Check oil dipstick again. If the oil has a watery appearance and has risen noticeably up the dipstick, then you probably have a blown head gasket or a warped head. Also, look for a sweet-smelling liquid coming out of your tailpipe. Any of the above symptoms could be the result of a blown head gasket.
The easiest way to tell is with a compression meter. This replaces the spark plug and lets you know what compression each cylinder is running at. If your compression is abnormally low, then you have a blown head gasket or a warped head. (Note: check the repair manual for appropriate compression of each cylinder.)
This can be detected in a variety of ways: One way is to note whether that part of the engine block is leaking fluid. This is difficult to determine since there are many other parts of the engine nearby that can also leak fluids, especially when a vehicle is parked in one place for more than a few hours. One of the best indications of a blown, or nearly blown, head gasket in most automobiles is when the cooling system appears to be malfunctioning. The cooling system's efficiency and performance can be directly affected by the quality of the head gasket.
If your radiator is getting low on water often, this is a sign. The water could be discharged through the tailpipe on your automobile. Another sign is if your car motor has a miss in the engine. The water could be going in on top of the cylinders. This will foul the plugs and cause it to miss.
There are a few simple indicators you can check for with the engine cold and not running: 1) contaminated oil - it will have a milky appearance from the water mixing in the oil 2) oil on the top of the coolant inside the radiator (if your vehicle has a remote header tank you may not get this); 3) Have someone crank (remove the coil lead or disable the electronic ignition) the engine on the starter with the radiator cap or coolant jacket bleed hose/bolt removed. If the coolant pulses up and down or blows bubbles, you could be in trouble. If you find any of these symptoms move on to removing the spark plugs (label the plugs and the leads as you remove them, so you can put them back in the same place) and again crank the engine on the starter. Depending on how badly your head or gasket is gone, you may get coolant or oil coming out of the plug holes. Inspection of the plugs will also reveal problems during combustion: if you have rusty flaky deposits on the plugs, you may be burning off water; and if you have a heavy carbon, you are burning oil. If you have any of the first 3 items listed (water in oil, oil in water, or pulsing coolant - but don't get any result from checking the plugs) change the oil and water as appropriate, then warm up the engine without the radiator cap on (or the bleeder hose/bolt) and watch for bubbles as the engine warms up. Put the cap back on the cooling system and take the vehicle for a short drive, or run the engine till the entire system is up to temperature and then check the oil for contamination. Having these symptoms is not always indicative of a blown head gasket; usually if the gasket is gone, there is going to be some warping of the head and or block of the engine.
Loss of engine coolant with no external leaks, a continuous stream of bubbles can be seen with the radiator cap off, black gummy and sometimes crusty stuff around the radiator

Several common signs of a blown head gasket:

Blue/white smoke coming out the tail pipe which indicates oil is burning
Dripping oil from the gasket itself
Carbon Monoxide or hydrocarbons in the cooling reservoir
Excessive coolant loss with no obvious source of leakage
Loss of power or a rough engine due to compression loss
Water mixing with oil
Oil mixing with water
Low compression in 2 or more adjacent cylinders
Remove dipstick and let a drop of fluid fall on hot part of engine - oil will smoke water will "sizzle"

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1 Answer

'98 dodge neon 2.0 dohc runs hot,new head gasket,radiator cap,no leaks or water in oil,new temp sensor,could bad intake gasket cause this?

Hi, Check the right amount of water it's holding if it is not as much as should be then what will clean all out is water mixed with caustic soda. Take great care use gloves ensure you don't go onto anything except inside your radiator & engine heater etc ONLY! run the engine so water gets hot when its run hot for ten minutes approx, drain this out REMEMBER THIS IS ACID. So take GREAT CARE. Clean your drains at home out for instance, This should have cleaned any blockage rust etc. After draining let cool a little 10 minuets then start engine & start to refill with antifreeze/water mixture by running the engine with your heater turned on to hot as well this should ensure no air locks & now the problem should be solved. Please leave me feed back Malcolm Campbell Thanks.

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1 Answer

Oil entering the cooling system

  • With a new radiator it sounds like a cracked head or a bad had gasket. The only place that oil can enter the coolant (other than a cooler line in the radiator) is from the two things I listed above. That's the only real place oil can pressurize into the coolant. A head gasket can leak antifreeze into the crankcase or oil into the coolant. Just depends on where the gasket (or block) fails.

  • You need to have a compression test to confirm this but if you replaced the radiator the head gasket ( in extreeme cases th block) is the the other reason for oil in the radiator.

  • Hope this helps.

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2 Answers

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You may be looking at OLD TRANSMISSION FLUID that has turned brown. This problem is normally associated with the Transmission Cooling tank leaking into the cooling system, there is not enough information in your write up to be 100 percent sure but I have had this same problem with a 328i

If it is OIL, then you are looking at a blown head gasket or a crack in the head or block. There are a few other ways to get oil in the system but I would start with troubleshooting the Radiator in a Tank and then see if there is air bubbles coming out of the Transmission fittings. This is going to be your first clue your radiator tank is leaking.

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