Question about 1991 Toyota MR2

1 Answer

Bubbling in overflow bottle 91 mr2 n/a

After driving for about 20 mins when i park my overflow bubble is bubbling and spraying coolant out i have already done all checks for head gasket leak except a leak down test.i have changed thermostats twice and burped all the air out.my heater core is not stopped up because it still gets hot and have flushed my radiator.me and everybody i have asked are stuck any help would be greatly appreciated thanks

Posted by on

  • lucky42039
    lucky42039 Jan 10, 2013

    i have already done the chemical test for the combustion gases.i really dont want it to be the water pump or head gasket because then i have to take the motor out to do either one

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toyota Master
  • 5,341 Answers

Have you done the chemical test to check for exhaust gases in the coolant? I believe you can rent the tester from autozone, or another outlet. All you have to buy is the chemical fluid. Exhaust gas will change the color of the fluid.
It is also possible the impellers on the water pump may be worn, and not pushing enough coolant.
You should also check the fan or fans are working properly.

Posted on Jan 09, 2013

  • montehammons Jan 10, 2013

    Oh, didn't know the engine had to come out for a water pump. Maybe you should go for the leak down test, then. It would be good to know the internal condition of the engine, anyway, before proceeding. Are the fans working? Good radiator cap?

×

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 3 Answers

SOURCE: Drained radiator added prestone Radiator flush refilled and started overheating, drained radiator replaced thermostat and now I get no heat from heater,Radiator water is hot

disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

Posted on May 08, 2012

alicantecoli
  • 22219 Answers

SOURCE: change radiator and coolant is overflowing in

when a vehicle gets to around 10yrs old or a high mileage the head gasket starts to fail unlike the old copper ones so seek advice from a garage who will put a pressure tester on the rad and run engine then check for a build up of excessive pressure which is a sign of a head gasket fatigue

Posted on May 30, 2011

Big Kwan
  • 93 Answers

SOURCE: My truck only runs hot

To reliably check the head gasket without costing you a cent, idle the car hot, to opperating temp. then one by one loosen the spark plugs.

It is very important that you dont take out all the spark plugs at once.

Start with cylinder 1

Loosen the sparg plug
Have a mirror nearby (one that will fit over the plug hole closely)
Remove the spark plug
and then quickly place the mirror over the spark plug hole
after 3-4 seconds quickly check on the mirror if there is any sign of moisture.
If so the head gasket is blown on that cylinder

When the head gasket blows moisture escapes into the combustion chamber wich will mist up the mirror glass.

Repeat this processe with the other cylinders

Posted on Feb 09, 2011

  • 154 Answers

SOURCE: overheating after head gasket replacement

signs your water pump isnt workin i had same issue

Posted on Aug 01, 2009

toyotahelp
  • 390 Answers

SOURCE: 1992 Toyota Celica - coolant

There is a fan coolant temperature sensor on the bottom of the radiator, it has an electrical connector on it, with the key on disconnect the connector, if the fans run constantly with the connector off replace this sensor.

Posted on Aug 20, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

What is wrong if coolant in tank is bubbling?


normally indicates head gasket or cracked head
have a compression test done
could be overheating from fan not operating or thermostat not opening
needs to be properly diagnosed by an accredited service shop

Sep 24, 2016 | Cars & Trucks

1 Answer

On my Suzuki gran vitara 2002 I am losing engine coolant from overflow pipe,,overheats after 20 mins of driving(once coolant tank empty),,recently had a new thermostat fitted...please help,,thankyou


you might have a blown head gasket, when the engine is cold remove the rad cap start the engine and look for air bubbling into the rad , if you see said bubbles then you need to have the head gasket replaced. PS Do not remove the rad cap when the engine is hot as you could be seriously injured/burnt

Mar 03, 2015 | Suzuki Grand Vitara Cars & Trucks

1 Answer

92 chevy lumina,car starts but wont idle.overFlow


If you see bubbles in your overflow tank, it is either overheating or (more probably) it has a blown head gasket. How long after engine cold start do the bubbles show?
A compression test could tell you more about the head gasket condition. You can also have the coolant tested against CO2 contamination.
Sometimes you can see oil on the surface of the coolant in the overflow tank when the head gasket is blown (check this with cold engine).

Oct 17, 2014 | 1992 Chevrolet Lumina

1 Answer

Excessive water pressure in radiator causing overflow tank to overflow in 1997 7.3 powerstroke


have a compression test done as that will most likely be a blown head gasket or cracked head allowing combustion pressure into the cooling system. A quick check is to remove the radiator cap and fill right to the top . Run the engine and if you see small bubbles in the water or it tends to belch out then it will be the gasket of cracked.

Mar 18, 2014 | 1995 Subaru Legacy

1 Answer

Water/coolant is being pushed in the expansion bottle,


Sorry almost certainly your head Gasket, sound like a break between a cylinder and the water jacket - hence the bubbles.

Jan 30, 2014 | Cars & Trucks

2 Answers

Losing coolant


Wait for the cooling system to cool down. Remove the radiator cap, start engine and watch for bubbles in the tank. If you have bubbles the possibilities of a bad head gasket is suspected. To verify a suspected head gasket, leave the radiator cap on and tighten. Start the engine, using a heavy towel or rag loosen the radiator cap SLOWLY. If pressure is evident only after a minute of running.....=Blown head gasket!

Jan 22, 2014 | Chevrolet Malibu Cars & Trucks

1 Answer

4.0 liter 6 cyl 2000 jeep grand cherokee i put new radiator in. new thermostat and had system flushed.it continues to overheat. with the cap off and engine running its bubbling up. is this an indication...


Either there is still air in the cooling system or you are correct that the headgasket has failed.

Running with the cap of for at least 20 minutes should clear the air out of the cooling system. If it continues to bubble after that than the bubbles are likely combustion gases sneaking by the head gasket.

Let run it with the cap on and let it start pushing coolant into the overflow. Shut it down and smell the coolant reservoir. If it smells like exhaust it is the head gasket.

Oct 18, 2010 | 2000 Jeep Grand Cherokee

1 Answer

I have a 98 town car that over heats in about 10 min. the heatercore was replaced.. the coolant flush was done and the thermostat was replaced and the problem still exist.. what do I do


you have a blown head gasket i suspect, have a shop test the coolant tank for the presence of hydrocarbons with a gas analyzer or look for bubbles in the coolant recovery tank tank, if u see bubbles the problem is the head gaskets are leaking..

Feb 22, 2010 | 1998 Lincoln Town Car

1 Answer

Car is overheating changed thermostat didn't help


Without more information, it is possible you have a air bubble in the coolant or a blown head gasket. Check the exhaust for smells of coolant (sweet) and the oil for signs of coolant as well, it will look like a milkshake. If you notice an excessive amount of visible bubbles in the overflow tank then more than likely you have a head gasket problem and the cooling system is being pressurized from the leak. To bleed the coolant system, remove the radiator cap and start the car and you should observe small bubbles rising to the top, again if there is an excessive amount then you have a head gasket problem.

Aug 29, 2009 | 2001 Kia Sportage

Not finding what you are looking for?
1991 Toyota MR2 Logo

148 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8518 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...