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Piaggio nrg scooter from cold.I fill the expansion tank but the coolant comes out of both breather pipes.When I unscrewed the reservoir cap the next day the coolant just flooded out the carb

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  • Cars & Trucks Master
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Blown head gasket allowing coolant to enter engine. Check engine oil dip stick for presence of coolant (milky).

Posted on May 17, 2017

Testimonial: "Ok thank you, but as it is a 2 stroke there is a separate oil tank so I'm unable to check for oil in water."

  • 1 more comment 
  • Joe Stanton May 19, 2017

    Coolant can still enter the transmission case, It has a dip stick or a sight glass

  • Joe Stanton May 19, 2017

    You are looking for water in the oil, not oil in the water. If water was coming out of carb. Then head gasket or the cylinder sleeve is leaking into the cylinder(electrolysis).

  • Joe Stanton May 19, 2017

    2 stroke or 4 stroke makes no diference.



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Why is the coolant overflowing when the temp guage gets half way?

well the tank must never be full, when engine is cold
was it? (read operators guide to see methods)
water expands hot, and the tank captures this expansion
that is normal.
what does "until its all gone", mean, what is IT?
there are lots of tests.
the first one, is,
IS the engine overheating,?
try a new rad cap, they are dirt cheap.
and, is the oil or carbon in the RAD neck, cap off , cold engine>?
is there water in the engine oil, milky dip stick end?
same with A/T trans? milk, or pink/red ATF.
is there steam going out the tip of the exhaust pipe on a fully hot engine>? yes/no?
is air and water exploding in to the side expansion tank.?

cold engine
remove rad cap'
fill rad with 50% AF.
new cap back on.
put 50% AF 1/2 way up in to expansion tank(its marked clearly)
start engine , does it overflow now>?

Jul 04, 2014 | Saturn SL1 Cars & Trucks

1 Answer

What's your problem?why is my coolant reservoir overflowing in my 2l camry 1992

Water expands with heat if you completely topped up the reservoir cold it should overflow. Actually the biggest problem is when breathers block on reservoir caps and the water vapour pressure cracks the bottle. The reservoir allows you cooling system to run full and take in account the volume (expansion ) increase when engine gets to running temperature.

Jan 12, 2013 | Toyota Camry Cars & Trucks

1 Answer

Front coolant cap brocken

yes u can , make sure the car is cold, you will have to remove the coolant expansion the bottom it has connection hose with a clip pin,Remove the clip pin,and to the side beneath their is a sensor,disconnect the sensor..then up top disconnect the upper coolant connection line,you will have two screws on some maybe three securing the tank,remove them,the tank will come out,replace with new tank reconnect the bttom hose and retaining clip,and then sensor,then the upper coolant line.Then fill with cooalnt crank the car ,turn the ac on on high,remove the bleed screw while car is running as you fill it up with coolant, continue filliung until the reservoir is up to the full mark and all bubbles have stopped coming out of the bleed whole...then put the bleed screw back,and the coolant cap...

Dec 13, 2011 | 2001 Jaguar XJ8

1 Answer

If expansion tank was low on coolant, will this cause my bmw to overheat? and where is the expansion tank located on my car?

Under filled cooling systems generally do not cause a "hot" running vehicle, there is most likely a mechanical problem some where. the expansion tank on all BMW's is usually a "yellowish" colored reservoir with a black cap, the only exception is the later models that have the expansion tank attached next to the radiator (they are black with a black cap.

Apr 26, 2011 | BMW 325 Cars & Trucks

2 Answers

Where is the radiator cap on a 1999

Radiator caps are disappearing form cars. Filling of the coolant is done through the expansion bottle. This should be easily accessible and visible as it has several pipes leading both to the engine block and the radiator. It will have a filler cap on it as well. As with radiators, do not open it when the engine is hot. Only check coolant level on a cold engine.

Jan 27, 2011 | 1999 Ford Taurus

1 Answer


Are you talking the expansion tank? If so - Drain coolant first by going underneath the car and take off the protective shield and unscrewing the blue plastic screw (make sure the car is NOT hot!), under the reservoir you'll see an electronic sensor - carefully twist is a 1/4 turn counterclockwise and gently pull downward to remove this sensor don't force it, you don't want to pay $150 to replace it. Disconnect the hoses on the top and bottom of expansion tank by pulling up the metal tabs upwards then pulling the hose away from the tank. I believe there are two or three screws which hold the expansion tank bracket in place, unscrew these and pull the bottom of the tank away from the radiator then lift upwards on the bracket (the bracket and expansion tank should then come out). Get the old expansion tank off the bracket and replace. You want to take off the bracket because getting a new tank on the bracket is a B*TCH!

Reconnect in reverse order.

Make sure to bleed the cooling system properly to remove air pockets (please use BMW coolant and distilled H20 in 50/50 mix - it's not the same as your Prestone or other mass produced coolants). Last replace the expansion tank cap because that might have created the expansion tank cracking.

Good luck and hope this helps

Dec 16, 2010 | 1999 BMW 323 Series

1 Answer

Where do i refill coolant? message reading low engine coolant.

please rate, thx Coolant Recovery System NOTE: When the water thermostat (8575) is closed, there is no flow through the radiator coolant recovery reservoir (8A080).

Trapped air in the cooling system must be removed. A pressurized radiator coolant recovery reservoir system is used which continuously separates the air from the cooling system.
  • When the water thermostat is open, coolant flows through the small hose from the top of the radiator outlet tank to the radiator coolant recovery reservoir.
  • The radiator coolant recovery reservoir separates any trapped air from the coolant and replenishes the system through its radiator coolant recovery hose to the water thermostat housing.
  • The radiator coolant recovery reservoir serves as the location for:
    • service fill
    • coolant expansion during warm-up
    • system pressurization from the pressure relief cap and
    • air separation during operation
  • The radiator coolant recovery reservoir is designed to have approximately 0.5-1 liter (0.53-1.06 quarts) of air when cold to allow for coolant expansion.


Jul 08, 2009 | 1995 Lincoln Continental

1 Answer

Putting water in a mini

From the top of the radiator (which is on the right hand side of the engine) beside the pressure cap there is a small hose pipe which leads to a plastic tank on the bulkhead.

This is called the expansion tank

On the side of the expansion tank is a level mark which shows how much water goes in there

If that is totally empty go back to the pressure cap on the radiator and unscrew it anti -clockwise (Only when the engine is cold and is not running).

Fill that up with cold water (Do you need anti-freeze in the water in your part of the world?)

Once that has been topped up replace the pressure cap making sure it is turned until it locks firmly then go back and fill up the expansion tank

Turn the engine on and let it run a while, water may escape from the expansion tank if you have over filled it.

If there are lots of bubbles and noises from the cooling system have it checked in case you have a leaky head gasket

Jun 12, 2009 | 2004 Mini Cooper

1 Answer

Symbol lit up

there can be a yellow light in the cluster that looks like a small radiator or box with waves inside of it to indicate water. This light means that the coolant level sensor has detected a low coolant level. Typically the expansion tanks inside of these cars will crack from heat and age. A simple diagnosis is to check your coolant level and top it off. Do not forget to bleed it by unscrewing the bleeder screw found on the upper radiator hose while filling up the reservoir found on the right hand side of the radiator. once the coolant has been filled, tighten the bleeder screw back down but be careful not to over tighten. and finally screw on the expansion tank cap. run the vehicle to operating temperature and use a flashlight to inspect the engine bay for leaks. If there is a leak, it will need to be repaired. possible leaks are a cracked expansion tank, leaking radiator hoses, or a leaking water pump or thermostat.

Oct 29, 2008 | 2001 BMW 325

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