Question about Peugeot 405

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Radiator looks like not function at all.after 2 or 3 minutes engine started water come out from small hole below cap and up to cap.If aircond on more water come out and engine become warm.Its old car and i checking the wiring was not in order.Dificult to trace which connection. Can i have the idea how to rewiring to solve all the problem.Temperature meter also not fuction at all.

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It's not wiring, replace thermostat.

Posted on Mar 22, 2011


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Please show me about radiator tank cap for put water in my car's radiator(accent 2016). best regards

hyundai accent 2016.. USA version

this is a picture of the engine bay

coolant color might be red if its an aluminum engine
square box is radiator cap

you follow the small hose below the radiator cap to find the
overflow bottle


Jul 03, 2016 | Cars & Trucks

1 Answer

My van over heated what could be the problem

Check the level of antifreeze/water in the coolant recovery tank. This is the white, plastic tank located near the radiator. The level should be checked while the engine is running.

Also, open the cap on the radiator (only when the engine is cool! wait at least 45 minutes after driving it) and start the engine. Once the cap is removed, with the heater on full blast, look in the hole under the cap. You should be able to watch the water flowing rapidly from one side of the radiator to the other. If the water is stagnant, I can almost guarantee you that your thermostat has gone bad. This is the most common cause of coolant system failure.

Good luck with it!


Jul 28, 2011 | 2003 Chrysler Town & Country

1 Answer

My rodeo started shooting steam out i filled it with coolant and during my 1 mile trip home water was pouring out from underneath,i poped hood,cap was on but steam was coming from below engine,help

Hi there,

Hopefully there is a hole in one of the hoses (least expensive).

No matter what, you need to find the source of the leak. A flashlight will be useful.

When the engine is cool, pour water in the radiator. You shouldn't need to run the engine.

When it starts dripping, look for the leak on:
  • The radiator
  • Large hoses leading to and from the radiator
  • Heater hoses (smaller leading to firewall)
  • Water pump (on the engine)
Once you find it, the severity and type of problem will dictated whether to fix or replace the damaged part.


Mar 24, 2011 | 1996 Isuzu Rodeo

2 Answers


I had the same problem with my Suburban. I was loosing water. Turned out to be a small crack in the plastic end cap just below the neck where the hose attaches. Had to replace the radiator which was not very hard. You should start with a pressure test of the system to see if you can find a leak. Some autopart stores will do this for you. Also have them check your pressure cap. You should also look at the water in your radiator to see if it has any rust or oil in it. If none of this reveals the problem the next thing to do is replace the thermostat. They are cheap and can cause problems after 100k miles. I is under the neck fitting on the engine where the top water hose attaches. If you still have problems then it may be change the water pump time.( Check the belt first) Water pumps usually have a small hole in the bottom of the housing which will start leaking water when the pump is going bad. If it is dripping water when the engine is running and hot then it is time to change the pump.
Good Luck

Nov 24, 2010 | 2005 Chevrolet Suburban

2 Answers

1998 Isuzu rodeo running hot. filled radiator & reservoir with water & coolant. There is a oily substance dripping from small hose at the bottom of radiator, dont see any water leaking. Just had...

Replace small hose and clamp, that hose come's from your transmission, goes through another tank in the radiator, to keep the transmission fluid cool, hope this was very helpful.

Aug 26, 2010 | 1998 Isuzu Rodeo

2 Answers


You may have a small pin hole in one of your hoses that is only leaking under pressure. Of course you may not notce it with the vehicle idling because the pressure is higher as the rpms rise while you are driving.

More importantly though, you need to check your oil dipstick. If the oil looks "milky" you may have water leaking into your oil. This can happen if you have a problem with your "heads" such as a small crack. A cracked head can lead to a blown motor so check it out as you are checking all of your hoses on your cooling systems.

Good Luck!

Jul 04, 2010 | 1992 Honda Civic

1 Answer

Small hole in bottom of radiator drips

There are products out there like stop leak that MIGHT stop the radiator leak. However... the only real repair is either to have it soldered (if the end caps are not plastic) or replace the radiator all together.

Adding a product like "Stop Leak" most often starts to introduce other problems to your vehicle like a future water pump seal failure or clogs in the smaller water passages in the engine block, heads and manifolds and the thermostat heater bypass hole. Anyone that has ever done any major engine repairs will know immediately if stop leak was used in a cooling system.

The best fix is to replace the radiator.

Many radiators today can not be repaired

Stop leak is in most any auto parts store. Just be advised of what you can expect down the road.


1. warmer than usual engine operating temps
2. water pump seal failure
3. heatrer core clog (no heat)
4. passenger heat control temp valve clog (no heat)
The choice is yours. Personally I would not do the "Stop Leak" treatment attempt. Sometimes it works other times it does not.

Feb 14, 2010 | Saturn L300 Cars & Trucks

1 Answer

Using water and top hose is realy hard like it is under pressure but no water in the oil

a reed896: There are a number of potential areas which will cause the symptom you describe. Areas to check:
1.Prior to starting, inspect the sealing surfaces of the radiator cap for cracks in the seal. Old caps will not keep the pressure in that well, consequently it causes coolant to blow out into the expansion tankwell below what the cap is rated for. Because the cap is bad, it will not function as it was designed where as it cools off, the coolant is drawn back into the radiator from the expansion tank.Top off the radiator, but leave the level about 1/2 inch below the neck but not to the top of the radiator if possible.
If the cap is in poor shape, replace it before proceeding.
Put the cap back on the radiator and position it in it's normal locked position. Start the engine and run it for 30-45 seconds then shut it off. Carefully open the radiator cap. If there is pressure in the system, this is not a good sign. Close the cap again and run the engine for a little over a minute and recheck it again. If your findings are the same, but it seems as though the pressure has built up noticeably more, you probably have a blown head gasket.
Head gasket failures don't always put water in the oil. It depends on where the gasket has failed.
2. If no problem is found, proceed with the next test. Start and run the engine and wait for the thermostat to open. What you are looking for is the top and bottom hoses will both be hot. The radiator will also feel hot and uniform in temperature across the entire surface. If after a few minutes the thermostat has not opened, only the top hose will remain hot while the bottom will be cool. If this is the case, you have a bad thermostat and it needs to be replaced. Typically if a thermostat does not open, the pressure in the cooling system will build rapidly after a few minutes and the top hose will appear to be very hard because of the pressure build up. The lower will also be relatively hard as well.. but it will be cool to the touch.
Look at these things first and if you come up empty, I'll lead you on to the more complicated testing.

Apr 20, 2009 | 1995 Isuzu Trooper

1 Answer

Water leak from top of expansion tank.2000 BMW 316i se

The water (coolant) in the expansion tank will rise and fall with the engine temperature. What the expansion tank does is collect and return coolant to and from the engine. When the engine warms up the coolant gets hot, builds up pressure and opens up the radiator cap. The coolant then goes into the expansion tank. Now when the engine cools down the pressure drops in the cooling system and the pressure drop (vacuum) pulls the coolant back into the engine via the radiator cap. The radiator cap allows the cooling system to build up pressure and by doing so increases the boiling point of the coolant, but when that pressure exceeds the caps rating the cap opens and the coolant goes to the expansion valve. The cap has another part to it that when the engine cools down and a partial vacuum is created in the cooling system a "valve" in the radiator cap opens and allows the coolant to be drawn back into the engine. I would look at your radiator cap to see if any gunk or build up is on it, and check the rubber gaskets for cracks. It's easiest just to replace the cap because they are inexpensive and easy to replace (2-10 dollars). The expansion tank should have two hoses on it. The one on the bottom comes from the radiator and the one on the top (possibly part of filler cap) runs down and is open to the ground. That way if it is overfilled or becomes overfilled it will slowly leak onto the ground. When and if you change your radiator cap, make sure the engine is cooled down, remove cap and start engine and turn heater to full blast, full heat. Leave the cap off and let it run until engine warmed up. This should burp out any air pockets that may have happened when coolant was changed. Also top off the coolant in the radiator while it is running. Hope this helps and good luck

Apr 03, 2009 | 1992 BMW 3 Series

2 Answers

Dash Temp Gauge reading extremely hot

You need to pressure test the cooling system. If it holds pressure, I would look at replacing the water temp. sensor. If it doesn't hold pressure, you have a coolant leak going on. If you don't see it dripping on the ground or inside the car, I would be suspecting head gasket problem.

Jun 09, 2008 | 1995 Ford Taurus

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