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Have a 2007 mitsubishi colt 2.8 tdi. no sign of overheating, was a hot day and the top part of the radiator blew. what gives????

Aircon stopped working for a bit, then heard a faint wistle sound and suddenly BANG.... big crack between the radiator cap and inlet waterpipe.... watetpump is fine, all pipes are fine, thermostat working... why the radiator off all things????

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Mustgo
  • 2359 Answers

SOURCE: 1991 honda accord is overheating. Installed new

When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

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Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

===

MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

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Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

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A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

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Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

Posted on Dec 05, 2009

  • 437 Answers

SOURCE: overheating: 1999 bmw 323i m series 2.5

the water pump and thermostat should have solved it. an air pocket can cause that but usually not to that degree.

don't get one of those cheap *** plastic impeller water pump for sissies. Get the metal impeller one. get a cool running thermostat and drill two 3/16" holes in it 180 degreess from each other. you may have installed the t-stat backwards.

Posted on Jun 20, 2010

daves944
  • 1050 Answers

SOURCE: blew egr valve after loss of power. gained power

You may be on the right track, I've never heard of an EGR valve blowing apart and I've been doing this along time, but I suppose a plugged cat could cause it. Try blocking the pipe, if power goes down, you could be right. Do you, or did you have any codes prior to the valve blowing? A bad cat will usually set a p0420 code. How many miles on it?

Posted on Jan 20, 2011

  • 2 Answers

SOURCE: Overheating

if the thermostat is placed in bakward it will overheat....and there is a small ball on the the top of the thermostat that helps the car bleed air...if the thermostat was placed in without that little ball on the top...the car has a hard time releasing air to bleed...id have the thermostat replaced again anyway just to make sure its not a faulty one..ok...hope that helps

Posted on Aug 06, 2012

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