I just get overheat 2 weeks back . After I take car to workshop they said that I have to change water pump, thermostat and head gasket (they check head pressure and they said its fine no need to replace)
3 days after I take car from workshop I experienced overhead again up to 50% as my car is GCC spec and normally gauge is on second line from down. But this time it was little crazy
the gauge was going up and down so fast like with seconds down and again up
I send the car to workshop again and after three days they said everything is fine and no problem is there
I take car and everything was normal till 3 day
Temp gauge again goes up till 50% . I switch of the car for 2hrs and start again and drive it gauge again go’s up but this time up to 75% I just pull over but I heard something like poooof (it was like noise if water flow or steam ) after that noise gauge come down within 1 second to normal level
I drive car again (I have video below from this moment) till car stop moving  and no more starting

watch below link please

<iframe width="640" height="360" src="http://www.youtube.com/embed/hHZTL-X-DQI?rel=0" frameborder="0" allowfullscreen></iframe>

I open de hood and saw there is housing pipe which go from engine side to body ( sorry I don’t know what is exactly name of that pipe ) it’s totally cut/broken from middle
I take car to same workshop when they open the engine. First they mechanic guy was totally impressed for broken pipe he said to me this pipe is so heavy duty and he never saw before like this
Anyway after 2 days they said to me that cylinder block has to be changed because of damage (ref to below pics )



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I ask them way this happened and they saying coz your injector was not injecting properly and it was injecting direct to that point coz it was dirty or.. This damage its happened
But im not believing that I want to blame them coz I believe they did something wrong during changing my gasket and water pump

Can someone help me with that plzzzzzzzzzzzzzzzzzzzzz

 

First of all, the gauge in the video is definitely not normal. It shouldn't even be near 1/2 way for GCC spec cars. Second if the gauge goes up and down fast like that usually indicates there is a lot of air in the cooling system which means the garage did not properly fill up coolant and bleed it from air bubbles.

As for the chip on the cylinder block, there is no way a dirty or clogged injector could cause that damage. I would talk to the garage manager and tell him the story with the pics and video. I suspect the garage did something wrong when they replaced the gasket/pump/tstat the first time and caused this to happen. This would never happen if it was properly fixed and the engine was normally functioning like it should.

BTW, where are you located?

 

I had similar reading on the coolant temp. gauge on my previous car. It turns out that the water pump was failing at some points. When it can't pump the hot coolant to the radiator and let the cooled coolant flow back into the engine block, the temp gauge will go all the way up. On the other hand, when it successfully circulate the coolant then the temp gauge drops. What could cause all that? It might be a malfunction thermostat that won't let the hot coolant out of your engine block, AND/OR the water pump doesn't do its job.

In any case, I have a huge doubt that the shop who replaced your thermostat, water pump, and gaskets did the job right. If there is a warranty on the job, you definitely can get them liable for the damage. If not, you got to take the hit like I did when I put my trust in wrong hands when I rebuild the engine for racing purpose.

Good luck!

 

Damn!!! Pretty scary having that Neddle going all the way up like that!! My Altima overheated too, bad head gasket!