Engine block

Well thank you for the quick response.
The problem I am still having is that my radiator drains out when I turn my a/c on and reached at 70km/h speed, I know that the block is not in a good shape besides that when I open the heated car bonnet the radiator is sucking water from the bottle and driping it at the same time from the bottle cap meanwhile the radiator has generated enough gas pressure. Secondly when I start pouring water into the radiator when the pressure is minimized it shows no oil mixing as I discussed earlier that my block seems to be weak but there are few air bubbles NO oil & water mixing all I can see is clean water remainings and no rusty water. I have serviced the radiator 2 times but that was almost one year back. Please guide me what to do.

Well I again appreciate your reply once again. In january 2010 I installed a new gasket (steel one) (glide) and my mechanic removed the rubber under the radiator cap (may be so that pressure can be released) it worked perfectly fine till last month i.E. November 2010 but suddenly by a/c compressor was not cooling well so I went for a gas refill and he also changed a rubber pipe for the a/c. Then the a/c started working fine but the problem arised into the radiator (the story I hv mentioned earlier). Well tonight I am going to bleed my radiator and then will see what would happen by the way what I understand of the term 'bleeding the radiator' is to empty the radiator by removing the nozzel at the bottom of it and refilling it without putting the nozzel back and when the water starts coming out at the nozzel opening with as it is being put into the radiator. I hope it really does not mean by dismentaling the radiator and get it serviced with a professional person. Awaiting for your comments. Iam trying to attacg the engine block pic once again (it was taken in january 2010)

So ur telling me to bleed the system as you described in ur message, secondly to get a new radiator cap with a rubber installed under its cap? Does my block needs replacement or I can continue with it by servicing or bleeding the system. I will today try to bleed the system again as I didnt know the meaning of the term 'bleeding' and shall post you again meanwhile please guide me for what I hv requested above.

Dear KHLow, first of all I really appreciate all your suggestions and replies.
Now the thing is that for bleeding the system as I am not a techy, u mean to say to first remove the radiator cap, start the engine (cold or hot?), Pump up the accelerator or not to, topup the (coolant or water?) As I am using water and when the level of coolant or water drops I add more water and top it up again and I may keep on doing this until 5minutes (in my case the cooling fan is direct).
In any case for bleeding the system I donot need to remove the nozzel which is located at the bottom of the radiator to empty the radiator.

Please guide me in this process step by step

shall appreciate your reply

Thanks will do it tonight, and for the thermostat its working fine and the temperature niddle in the temp guage remains almost at the half point during the normal run and when I drive the at the speed of 70km/hr plus with the a/c on the abnormal functions starts as mentioned earlier and the temp. Niddle starts rising above the half point and as u have mentioned abt the thermostat I would also like to bring one more thing in ur knowledge that when the warter starts dripping from the radiator plastic bottle the niddle of temp. Keeps on the half point but has shifted boiling water to the bottler from the radiator. Thanks for the tips, will inform you abt the progress when done. Thanks again

Oh yes the thermostat valve is also removed from my car do I need to reinstall it or run the engine with its presence. What effects would it cause if removed, the normal outdoor temp where I live during winter is 25C to 15c and durinf summer it is 45c to 30C

I did the procedure using coolant and replaced the radiator cap with a new one.
Then I went for a test run, turned on the a/c and again went at the speed of approx 80km/hr. This time the coolant didnt went into the bottle but the temp rised almost to full during the test run and when I opened up the radiator cap to refill there was too much pressure built up and approx. One liter of coolant was ejected with a high pressure. I dont know what to do next!

Hi there. Sorry I was away for a few days (out of town), well today I have got my radiator serviced, it was chocked but yet I have not taken a test drive will do it tonight and will post u.

It really effect the performance but yet I hv not taken a dreadful test drive cuz now the problem is that "when the radiator was dismentaled (taken out from the engine compartment) at the bottom of the radiator there was a leak about 1.5inches long and was prompt cuz of use of green clored coolant. Now the radiator was further dismentaled and was found 70 to 80% chocked. After the radiator was serviced it was getting difficult to put the radiator 'plastic bottom' back to the radiator body by the technician and a rubber packing was also found in the radiator whcih had been streched out due to any reason, so the technician put in another rubber (not new) and then finally closed the groves of the radiator by attaching it to the plastic bottom with the help of a pair of plairs. This was done after 3 tries. Every time the radiator was not getting into the plastic bottom as a perfect fit. So that was abt the radiator, this morning when I checked the bottom of the radiator I found a drop of water dripping again probably from the same place, I went back to the radiator service man and he told me that it will get alright itself when the engine will get enough hot during a reasonable run. The total amount of water that was dripped over night was about 100 to 150ml approx. May be less. Now advise me either I get the bottom replaced with a new one which shall be of brass or put silicon or any other material (please do advise if any material can be used, one of my friend advised me to use DOW CORNING 732 multipurpose RTV sealant around the neck of the bottom or let it be as it is for the time being and wait for the time so that the leak may vanish itself. Awaiting for ur quick response

First of all marry xmas.
Ther were no leakages since last night and will still monitor it for a couple of days and if there would be no leakages (physical) then I will go along with the radiator presently installed.

Besides this I am also planning for a complete car make over i.E. Body repaint cuz it is effected with rust, the other important work which needs urgent attention is the replacement of tie rod end and steering rod bush kit as I feel light****** in my steering

Thank you your solution has worked for me so far