Question about 1997 BMW 328

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Hi i have an overheating problem i replaced the radiator and the head gasket and got the head shaved, fill the coolant up and bleed it both hoses were hot and drove it around. the next day i had to work so i drove it to work and as it was idlingfor about 10 minutes waiting and it overheated again anything else that i could have missed

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Thermistat .did you flush the motor?could be a colapsed hose. are the fans working.

Posted on Sep 13, 2010

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On a 2006 1.3 Rocam. After a broken heater hose, the engine overheated, and I didn't notice until the bakkie lost power. I replaced the head gasket, with no success. The engine still overheated.


Have you checked to see if your fan is working ?
After performing your repairs, did you bleed the coolant system ? One way is to run vehicle with heaters running to make sure that air in the heater core / hoses is bleed.

Jun 17, 2017 | Ford Taurus Cars & Trucks

2 Answers

Overheating


hello my8,
First confirm that the engine is actually overheating - steam, no heat to the interior etc. Sometimes a temperature sensor will fail and give a misleading 'overheat' reading on gauge. For that matter sometimes the gauge can fail and give the same misleading reading. Check that the cooling fan comes on when the engine temperature starts to rise above 'normal'. If not check (in order) fan fuse, fan relay, fan sensor, fan. Real overheating is caused by a lack of coolant AND/OR lack of coolant flow. Modern cooling systems are 'closed'. In other words there should be little or no loss of coolant. If the level is significantly low you have a leak....either external or internal. With the coolant topped up to the correct level and the radiator cap on, run the engine and look for visible leaks...hoses, valves, radiator etc. Internal leaks, eg. head gasket will usually be accompanied by white exhaust smoke (steam), hard starting, rough running and bubbles in the expansion tank. Sometimes, though NOT always, you will fiand the engine oil has a milky look and/or engine oil will be mixed in with the coolant.

Lack of coolant flow can be caused by anything in the system that causes an obstruction......in order of common occurance......thermostat stuck closed, radiator blockage, heater core blockage, water pump failure. One last point. because of design considerations many vehicles have the radiator mounted at a different level than the uppermost coolant passages in the engine thus trapping air in the coolant passages. In short the system must be bled of air in order to properly fill with coolant. Such systems will incorporate bleed screws usually in either the top/side of the radiator, the top hose, the thermostat housing and sometimes in all of these points. To bleed out the air do NOT run the engine as you fill the radiator. Instead, open all bleed screws. As you fill the radiator coolant will run out of one or more bleed points. Close this bleed point(s). Continue to fill until coolant escapes from the next bleed point then close that one. Proceed until coolant has escaped from ALL bleed points then continue to fill to the correct level. The expansion tank will have minimum and maximum level markings. Fill only to the minimum level mark with the engine cold.

hope helpful,
greetings

Nov 10, 2011 | Cars & Trucks

1 Answer

Its keeps overheating i change radiator and head gasket and still overheating


Did you also replace your thermostat? If it's stuck closed, engine will overheat.
When you did the HG, did you have head checked for cracks or warpage? A cracked head will cause severe overheating.A warped head may or may not show signs of external coolant leakage. Either of these conditions can occur if overheating is severe enough.
Are your hoses in good shape? An old hose can collapse when it's hot, and restrict flow. Feel them (when cool) for any sign of sponginess.
New radiator cap? The cap provides a seal to pressurize the cooling system.
Finally, how about your water pump? Any sign at the weep-hole of leaking coolant? Your water pump inner seal is bad, remedy is a new water pump. Or maybe the pumps' fins have corroded and not pushing coolant sufficiently. If there is corrosion, get the whole system flushed and start anew.
Pull your spark plugs and look for any sign of coolant in the cylinders. I know it's a pain to keep going back and checking, but you gotta be thorough. Plugs may be blistered white from overheating, but if you get it fixed, they should be alright.
Now, finally, really: sometimes, Randy, just a small air pocket in coolant can cause overheating. So, make sure you bleed the system if it has a bleed screw, or fill, cap loose, run engine till t-stat opens, level in radiator drops, then re-fill, and add coolant to your overflow reservoir to around the full hot mark. Tighten cap, and you are done. Good luck.

Oct 20, 2011 | 2004 Jeep Grand Cherokee

1 Answer

2001 Monte Carlo. Overheating and heater blowing cold air. Already replaced intake Gaskets, cap, Thermstat, had coolant in in oil before intake gaskets. Oil is clean now. It seems to be loosing coolant....


Park the car uphill, take cap off radiator, start car, fill radiator, let it warm up until thermostat opens, bleed air out, fill to the neck of the radiator and watch for bubbles coming up. Once you have bled the air, if gas continues to come out, you have a blown head gasket. Also check the exhaust for excess moisture and the smell of coolant. You may be able to determine which gasket is bad by looking at the plugs and/or running a compression test. Let me know if you have more questions.

Dec 03, 2010 | Chevrolet Monte Carlo Cars & Trucks

1 Answer

Car is overheating no heat in car


You probably have air in the system caused either by a leak or blown head gasket. Fill up the system and check for leaks.

If your car has been losing coolant, you know you have a leak. If it isn't leaking out the bottom, it may be going into the oil pan or into the combustion chambers, but let's leave that horrible possibility for last. Some common leaks are the water pump weep hole (small hole at pump shaft bushing that leaking when bushing wears out), radiator hoses, other coolant hoses, radiator, heater core, and my personal favorite--rotten freeze plugs. If you have any of these leaks, you car will habitually be running on less coolant than it is designed for, and the coolant will boil at a lower temperature because of reduced system pressure. I'm not going to cover how to repair all of these but rather ask you to get back to us if you need help with them.

If none of the above are the cause of overheating, we must consider some more serious causes. A blown head gasket or cracked head/block can allow oil into the coolant or combustion gases into the cooling system (among other things that do not cause overheating). This latter case can cause the engine to overheat within a few minutes. If you car overheats this quicky, a blown head gasket is likely (but I would still advise someone to check the thermostat before pulling a head). This condition can be verified by removing the radiator cap and running the engine until hot. Bubbles of combustion products will be seen coming up in the radiator or into the coolant reservoir. As mentioned under bleeding after thermostat replacement, it is normal to have air come out during bleeding of the system, but if the bubble continue indefinitley, you are getting combustion products.
Oil in the coolant can also cause overheating as the oil mixes and thickens or "foams" the coolant until it cannot flow or transfer heat sufficiently. This contamination is easy to observe.

Nov 28, 2010 | 2001 Cadillac DeVille

3 Answers

Replaced the broken radiator its still over heating


good be the thermostant. if that has the v6 engine 3.8 then have a block test done you may have warped a head, these engines are none for head problems when they are overheated.

Jan 08, 2010 | 1995 Ford Thunderbird

3 Answers

99 deville head gasket leak?


A head gasket leak is usually indicated (among other things) by continous overheating of the motor, and subsequent loss of coolant.
It can also be indicated by the presence of engine combustion gas bubbles in the coolant resevoir.
Ensure the coolant system has no external leaks, such as faulty hose/s, radiator etc.

Ensure motor tune or other motor mechanical condition is not the cause of overheating.
I assume the motor is actually running hot.

Check cooling fans are operating ok (as necessary when car warms up):- if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check/replace the thermostat,
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary when re-filling,
Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.

Sep 21, 2009 | 1999 Cadillac DeVille

3 Answers

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

Aug 16, 2009 | 1992 Ford Explorer

1 Answer

Waterpump went out and engine got real hot and blew upper radiator hose replaced waterpump and hose now it wont fire


It is very likely the overheating has blown the cylinder head gasket and coolant is getting into cylinders or compression is leaking from cylinder to cylinder or both, you will need to remove the cylinder head and have it checked for warp-age and shaved flat by a machine shop if ness, and replace heat gasket.

Apr 07, 2009 | 1997 Mazda Protege

2 Answers

1995 legacy 250t wagon - overheating


Two possiblities; a blown head gasket, or a freeze plug leaking. If possible take it to a trusted shop and have the pressure checked on the radiator, they can tell you if your radiator is stopped up, or the freeze plug is leaking, and if it's blowing back in the radiator when you remove the cap then it's a blown head gasket.

Sep 28, 2008 | 1993 Subaru Legacy

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