PrestoneCoolant Flush, Engine Coolant Flush For Car To Prevent Problems & Maximise Performance, Car Coolant Flush With Advanced Cleaner To Dissolve Corrosion & Scale, Safe For All Engines, 1 Litre

Before prestone I used first liquid moli for a clogged heater core after replacing the thermostat and observe that my system doesnt have any rust as I change coolant every 2 years. Spotless but no heating..Few sand like bits came out but it did not unclogged the heater and no heat was comming out. Then I pured prestone flush directly in the heater core pipe before the firewall and let it sit for 5 minutes. It was not going in easy as the core was blocked. I thought it might be the silicates from the coolant and prestone says it deals with it and thats wjy I bought it. At first it made it worse. There was no heat on the return pipe from the heater core. As an amateur mechanic I thought that I really clogged everything now. Then after an hour the return line started warming up and there was heating in the cabin. Yes baby! I left the other product for one hour and the prestone for multiple hours running at operational temp. Multiple flushes before and after and MB 325 G48 coolant with deionised water in the end. I dont write many reviews but I thought this is useful. Mercedes clc cdi c200 2009 with no heater valve. In the past I used citric acid but it coagulated and had to flush with distilled vinegar and air pressure pump. Maybe the citric acid I used was crystals..I hope this helps.

Great job done what it is meant to

It’s works well and does a good job of cleaning out general sludge but it doesn’t remove k seal from a cooling system.

I brought This as I needed to flush my coolant tank and hoses due to a oil cooler leak I followed the instructions on the bottle and ran the car for about two hours and after dropping it from the radiator the coolant now looks like coolant so it did as it said it would at a great cost so on my next coolant service il use this again to keep my coolant looking fresh to help the car stay cooler.

Very good stuffVery effective

Used a full bottle of this with some distilled water to flush out my cooling system. Had a drive round for 30 mins, blowers were working fine. Let stand overnight & drained next morning. I had already flushed out with distilled water to flush out the bulk of the crap in there. I just used this for a final clean. When I come to drain the cleaner out I spent most of the morning having to flush all the bubbles out. Every time I thought it was done more bubbles came out. Anyway after doing several flushes with clean water and making sure the radiator, engine block & heater unit was all clear of bubbles I used Prestone coolant to fill up with.

Done what he needed for it to thanks

I did a full flush of the radiator and air cooling system with clean tap water a couple of times to get the worst of the crud out, then used this with a small amount of de-ionised water to fill the system, bled the air out and ran the car until hot.After emptying and flushing the system again with de-ionised water a couple times, I used Prestone Coolant NEAT with no extra water (as recommended as part of the process) and now my engine temps seem to have gone down by 10-15 deg, enough to keep it comfortably in the middle of the gauge, so it and the new Prestone coolant has done what I wanted and it's guaranteed for 5 yearsFollow the instructions, and maybe watch a YT video or two, but simple enough process for a not particularly mechanically minded person like me.