Originally Posted by adamstasiak

I am glad it worked for you.

I have a concern either the mechanic neutralised the CLR after flush. CLR is Phosphoric acid H3PO4 and with time it will eat your radiator and the heater core. It may take a couple of months or a year, but it will happen. Flushing it out does not do the job as some of it is in your aluminum and will be released later. You need to add some base to it which contains OH- ions to convert the H+ ions to water. As an example it could be 10ml of ammonia or 5 grains of your dishwasher detergent.

The other concern is the possibility of the residue plugging your leak (if you had one) and in this case you will loose your heat again.

Originally Posted by gurba

Hey guys,

On the same track... my car the temp gauge does not seem to work (goes to 90 and then down to 50) and the only way i can get heat in my car is if I accelerate... if the car is idle it does not produce any heat.. i have changed the coolant sensor, heat core flush, thermostat c change.. earlier this year i did a timing belt, water pump and accessory belt... so a mechanic told me that there is air in the system but he can't get it out... he said it might be the water pump... what does everyone think?