Radiator Super Cleaner and Flush (32 fl. oz.)
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Peak Radiator Super Cleaner and Flush (32 fl. oz.)

Part No. PKF0AE Warranty  
Peak Radiator Super Cleaner and Flush is a combination radiator cleaner and flush that's been engineered to remove tough deposits in your vehicle's cooling system.

Product Features:
  • Combination radiator cleaner and flush
  • Removes tough cooling system deposits
  • Services systems up to 12 quarts
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Volume:32 oz.
Container Type:Plastic bottle

REVIEW SNAPSHOT®

by PowerReviews
PeakRadiator Super Cleaner and Flush (32 fl. oz.)
 
4.1

(based on 18 reviews)

Ratings Distribution

  • 5 Stars

     

    (8)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

88%

of respondents would recommend this to a friend.

Pros

  • Easy to use (12)
  • Can withstand use (4)
  • Compact (3)
  • Reliable (3)

Cons

    Best Uses

    • Home garage (12)
    • Upkeep (12)
    • Automotive repair shop (4)
      • Reviewer Profile:
      • Auto enthusiast (3)
      • Reviewer Profile:
      • Auto enthusiast (7), Casual driver (4)

    Most Liked Positive Review

     

    Follow directions

    Important to note that the directions state to drain your system and flush with water, then add this with water to fill, then drive around for a week for best results. This has...Read complete review

    Important to note that the directions state to drain your system and flush with water, then add this with water to fill, then drive around for a week for best results. This has to be done only above freezing since you have no antifreeze in the coolant at this time. Then drain, flush with distilled water, and refill with 50/50. Altogether, two afternoons of work over a week to do it right.
    Bottle also states it treats up to a 12 liter system. Seemed to work well in my Sentra. Flushed clean with only 2-3 gallons of distilled water after using this.

    VS

    Most Liked Negative Review

     

    Didn't clean anything

    Ok so i purchased this flush kit because i had more than a little build-up in my radiator and cap and wanted to try and flush out the system. You have to drain the...Read complete review

    Ok so i purchased this flush kit because i had more than a little build-up in my radiator and cap and wanted to try and flush out the system. You have to drain the system first before you use this product, which is sorta a pain in the butt but i went along with it. Upon draining the fluid i could see some solid particles floating out and i was happy to see this. Once drained you fill up the rad with the product and water and you are supposed to drive around till it gets to normal operating temps and then it does its thing. I drove around a week with it in there because i didnt have time during the week to drain it and cause i wanted to give it the most amount of time to work. Drained the rad on the weekend and nothing came out; no solid particles, nothing. I looked inside the rad and there was still residue. Maybe my situation is more severe than most, however i bought the product in hopes it would work, and it didnt. I guess take your chances.

    Reviewed by 18 customers

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    (4 of 4 customers found this review helpful)

     
    4.0

    Have to Clean it...Do It Right!

    By Double Oh

    from Myrtle Beach, SC

    About Me Auto Enthusiast, Casual Driver, Truck Enthusiast

    Verified Buyer
    Level 2

    Pros

    • Can Withstand Use
    • Compact Design
    • Reliable

    Cons

    • Difficult To Use
    • Heavy

    Best Uses

    • Home Garage
    • Upkeep

    Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

    Had to replace heater core, but had to clean out radiator. There was rusty debris and dirty water along with a bunch of gunk. Poured it in, cleaned radiator a few times, got it back to normal. I needed other items as well, and there are other Auto shops. I will only shop at Advanced. I can order from home, they have it, put it on the side and it is all ready when I go to pick it up. Truck is better now. Nice to have heat and no problems.

    Comment on this review(earn points)

    (0 of 3 customers found this review helpful)

     
    5.0

    Cleaned out a neglected cooling system

    By kishy

    from Windsor, ON

    About Me Auto Enthusiast

    Level 3

    Pros

    • Easy To Use
    • Effective

    Cons

      Best Uses

      • Home Garage
      • Upkeep

      Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

      I bought a 1983 Grand Marquis with low mileage that sat for a minimum of 10 years before I got my hands on it. Sitting unused and low mileage are both bad things for a car, particularly the cooling system.

      I popped open that radiator and found so much old crusty stuff in there I figured I'd have to replace the rad, heater core and have the engine professionally flushed. I decided to try this first to see how much it cleaned up, and I'm glad I did. I removed the thermostat, bypassed the heater core (going to replace it to avoid issues with blocked passages), flushed out the engine and rad until it was all water inside, and put this flushing chemical in.

      I drove it around for a while, parked it, let it sit for a week and returned to the project the following weekend. Started it up, drove it around a bit, let it cool off and looked inside. The rad is much, much cleaner...this flushing product successfully dissolved a lot of the crusty deposits and cut through a lot of the "old coolant slime" as well.

      The engine is running cooler now, thanks to better contact between the coolant and metal, and I've been able to delay buying a new rad (the heater core is staying bypassed until it's time for a new rad as well, since this car won't be winter driven). Definitely worth a try if your cooling system has been neglected.

      Comment on this review(earn points)

      (3 of 4 customers found this review helpful)

       
      5.0

      Works great

      By Naquin57

      from Memphis,TN USA

      About Me Casual Driver

      Verified Buyer
      Level 2

      Pros

      • Can Withstand Use

      Cons

        Best Uses

        • Home Garage

        Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

        Follow instruction works just fine

        Comment on this review(earn points)

        (1 of 3 customers found this review helpful)

         
        5.0

        Seems to do the job

        By Brock

        from Bloomdale, OH

        About Me Mechanic

        Ask me a question

        Level 4

        Pros

        • Easy To Use

        Cons

          Best Uses

          • Home Garage

          Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

          Seems to work well. I did not get much junk out of the system but there may not have been much to begin with.

          Comment on this review(earn points)

          (3 of 10 customers found this review helpful)

           
          1.0

          Didn't clean anything

          By fixit till it dies

          from Norfolk, Va

          About Me Do It Yourself Mechanic

          Ask me a question

          Level 3

          Pros

          • Relatively Inexpensive

          Cons

          • Didnt Clean Out My Rad

          Best Uses

            Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

            Ok so i purchased this flush kit because i had more than a little build-up in my radiator and cap and wanted to try and flush out the system. You have to drain the system first before you use this product, which is sorta a pain in the butt but i went along with it. Upon draining the fluid i could see some solid particles floating out and i was happy to see this. Once drained you fill up the rad with the product and water and you are supposed to drive around till it gets to normal operating temps and then it does its thing. I drove around a week with it in there because i didnt have time during the week to drain it and cause i wanted to give it the most amount of time to work. Drained the rad on the weekend and nothing came out; no solid particles, nothing. I looked inside the rad and there was still residue. Maybe my situation is more severe than most, however i bought the product in hopes it would work, and it didnt. I guess take your chances.

            Comment on this review(earn points)

            (3 of 5 customers found this review helpful)

             
            4.0

            does what it says on the label

            By K

            from houston

            About Me Auto Enthusiast

            Verified Buyer
            Level 4

            Pros

            • Easy To Use

            Cons

              Best Uses

                Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

                Seems to do the job well. Picked up all the crud in the cooling system and did a pretty decent job of clearing it out.

                Comment on this review(earn points)

                (4 of 7 customers found this review helpful)

                 
                4.0

                Flush

                By thecyclops

                from NC

                About Me Auto Enthusiast, Casual Driver

                Verified Buyer
                Level 3

                Pros

                • Easy To Use

                Cons

                  Best Uses

                  • Home Garage
                  • Upkeep

                  Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

                  Good product and easy to use.

                  Comment on this review(earn points)

                  (3 of 6 customers found this review helpful)

                   
                  4.0

                  Radiato clean, but used it anyway

                  By rannolen

                  from Rogers, Tx. 76569

                  About Me Casual Driver

                  Ask me a question

                  Verified Buyer
                  Level 4

                  Pros

                  • Easy To Use
                  • Its A Radiator Flush
                  • Reliable

                  Cons

                  • Small Price For Flush

                  Best Uses

                  • Upkeep

                  Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

                  Its a radiator flush. Seems to clean ok.Since most cars can be drive high mileage before change why not use it.

                  Comment on this review(earn points)

                  (5 of 10 customers found this review helpful)

                   
                  5.0

                  BEST OF THE BEST

                  By HOSS

                  from Claremont N .C .

                  About Me Mechanic, Truck Enthusiast

                  Verified Buyer
                  Level 3

                  Pros

                  • Can Withstand Use
                  • Compact Design
                  • Easy To Use
                  • Reliable

                  Cons

                    Best Uses

                    • Automotive Repair Shop
                    • Home Garage
                    • Roadside Repairs
                    • Upkeep

                    Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

                    BEING USING PRESTONE PRODUCTS FOR A LIFETIME NO PROBLEMS

                    Comment on this review(earn points)

                    (5 of 10 customers found this review helpful)

                     
                    4.0

                    works I think

                    By DrDT

                    from houston, tx

                    About Me Auto Enthusiast

                    Verified Buyer
                    Level 3

                    Pros

                    • Easy To Use

                    Cons

                      Best Uses

                      • Home Garage
                      • Upkeep

                      Comments about Peak Radiator Super Cleaner and Flush (32 fl. oz.):

                      the liquid is clear so it's hard to know how well it works but the process is pretty intensive

                      Comment on this review(earn points)

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                      Do you have questions about this product?(earn points for answers!)

                       

                      Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                      39 Questions | 50 Answers
                      Displaying questions 1-10Previous | Next »
                      • Q:

                        I have the dreaded northstar engine in my Cadillac I used a cheap glass base headgasket sealer .The manufacture said to use Prestone super radiator flush before using their sealer which is made for the northstar engine which costs about $350.oo and they guarantee their product so want to make sure if I use Peak super cleaner that it does same thing as Prestone
                        Asked on 10/3/2014 by Bob from Russellville Ky

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Bob! This removes cooling system deposits and helps ensure a properly flushed cooling system, which operates the same way as a competitor's products.

                          Answered on 10/6/2014 by Solomon
                      • Q:

                        Is peak radiator super cleaner and flush safe on engines that have alumminu in them.
                        Asked on 11/8/2012 by gene from englewood FL

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This Peak Radiator Super Cleaner and Flush (32 fl. oz.) (Part No. PKF0AE) is safe on engines that have aluminum in them. For more information, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our technicians would be more than happy to assist you.

                          Answered on 11/8/2012 by Steve from AAP
                      • Q:

                        I have a 2000 Honda Odyssey, with 205k miles. When I drain the coolant, about a half gallon remains in the cooling system. I know this because the listed capacity exceeds what I can drain out of or put into the system.

                        Honda doesn't mention flushing in the service manual. They only stock a 50/50 pre-mix, so Honda simply avoids this problem. Just drain, fill, and go, no flush ever mentioned.

                        >> If I use radiator flush, some remains. What do I do about this?

                        Honda recommends never using tap (mineralized) water. These Q&A's ignore this, that mineralized water can cause problems with deposits later on (which has also been my experience).

                        I just changed the water pump. The impeller (steel, cad plated) had some deposits on it. And - the ScanGauge (which reads the ECU) temperature, lately has been rising a bit while going uphill.

                        I want to use this cooling system flush, but I am concerned, because (with this vehicle), I cannot drain all of the coolant.

                        What next?
                        Asked on 6/5/2012 by j14152 from West Palm Beach, FL

                        2 answers

                        • CUSTOMER CARE

                          A:

                          In order to best answer your question, please can call us directly at 1-877-ADVANCE (238-2623) and our technicians would be more than happy to assist you further.

                          Answered on 6/6/2012 by Steve from AAP
                        • A:

                          The reason you cannot drain all the coolant with just unscrewing the draincock on the radiator is because there is alot of coolant remaining in the engine block/cylinderhead and some remaining in the small bypass line(s) that run to your intake manifold and the engine oil cooler if you have one.
                          You will have to unscrew the engine coolant block plug.
                          There is a plug on engine blocks that is there so you can drain the coolant out of the block/cylinder head.
                          You MAY have to remove the thermostat to flush the system fully.
                          Its closed when cold
                          If you take out the thermostat you will need a new gasket and/or some BLUE RTV silicone sealant/gasket maker you might get away with using the old gasket with some new blue rtv,but make VERY sure you clean the mating surfaces of the housing and engine block/cylinder head.
                          NEVER EVER use tap water!ONLY use tap water to FLUSH with the garden house to FORCE particles out the draincock/block INITIALLY.
                          Use ONLY DISTILLED water to FILL the system.

                          Answered on 6/13/2012 by sean from okc,ok
                      • Q:

                        how much of flush do you use 1999 camaro, 3.8 liter?
                        Asked on 4/13/2012 by hilemanstout from portsmouth ohio

                        1 answer

                        • CUSTOMER CARE

                          A:

                          With engine off and cool, remove radiator cap. Drain radiator then close draincock. Pour entire contents of Peak Radiator Super Cleaner and Flush (32 fl. oz.) and fill with water. Run engine with heater on highest temperature setting for 10 minutes after reaching normal operating temperature. With engine off and cool, remove radiator cap, drain radiator, and close draincock. Refill with water and replace radiator cap to fully closed position. Stop engine and allow to cool. Remove radiator cap, drain system and close draincock. Add enough recommended coolant to achieve a 50-70% concentration. Top off radiator with water. Replace radiator cap to fully closed position. Run engine for 20 minutes to mix coolant/water.

                          Answered on 4/20/2012 by John the Car-Doc from AAP
                      • Q:

                        This PEAK product does NOT do the job. Radiator/cooling system has oily residue which was the result of mixing the new type anti-freeze with the older green type that car was manufactured with and No, I don't have bad head gasket or internal leak. I flushed the cooling system w/ flushing "T" connected to heater hose inlet then added this Peak Super Cleaner & Flush. I followed directions for letting engine run to normal operating temp then flushed cooling system again and added Prestone Dex-Cool anti-freeze. Next day I still had the oily residue in radiator so I flushed cooling system again & put this in radiator again and drove car for 3 days, apx 100 miles. I drained and flushed again and still have the same residue in cooling system. Bars 10 minute flush didn't get completely rid of oily residue either but is any familiar with Dupont product that used to be sold for flushing & cleaning the cooling system or, where can I purchase the Dupont product? It's the only product that works.
                        Asked on 1/23/2012 by Jim C from Franklinville, NC

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Sorry, the Dupont product is not available online now. However, please visit your nearest Advance Auto Parts store or call us at 1-877-ADVANCE (238-2623) to check the availability of this product.

                          Answered on 1/24/2012 by Steve from AAP
                      • Q:

                        how do you eliminate an air bubble and how do you determine if clutch fan is working while driving?
                        Asked on 12/25/2011 by WRR from Sparta

                        2 answers

                        • CUSTOMER CARE

                          A:

                          The required information on eliminating the air bubbles and to determine if fan clutch is working while driving has been sent to the mail address provided.

                          Answered on 12/26/2011 by Vincent from AAP
                        • A:

                          If clutch fan didn't activate while you were driving, you will see your temp gauge showing over 200 degrees or, your in-dash idiot light would come on, (depending on which type of sending unit you have). If your question pertains to not getting warm air from your heater vents, that would mean that either your thermostat is stuck in the open position, your radiator coolant was low and yes, your radiator is full but has air in system. Most newer autos have bleed screw on thermostat housing that you can open when operating temp is normal. After you let car run long enough to reach normal temp, @180-190 degree, open the bleed screw until you see nothing but anti-freeze/coolant coming out then close it. If you don't have or can't find the bleeder screw, find the coolant hose that is located at the highest point and loosen the clamp slow & just enough to see coolant coming out. When you get all the air bubbles out & don't see nothing but coolant seeping out, clost the hose clamp.

                          Answered on 1/25/2012 by Jim C from Franklinville, NC
                      • Q:

                        Will this product help clean out the heater core.
                        Asked on 11/6/2011 by anonymous

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Yes, this may help to clean out the heater core, but it takes time for the chemical to work really well and flushing the system afterwards is a must.

                          Answered on 11/7/2011 by Vincent from AAP
                      • Q:

                        how does this compare to prestone super flush and are the chemicals basically the SAME in each?
                        Asked on 11/4/2011 by Anonymous

                        2 answers

                        • CUSTOMER CARE

                          A:

                          In order to best answer your question, our technicians would be more than happy to assist you if you could please call us at 1-877-ADVANCE (238-2623).

                          Answered on 11/8/2011 by Dennis from AAP
                        • A:

                          Prestone Super Flush does a much better job than Peak. Peak is just not the answer if you want to flush and clean the cooling system even with a "flushing T" connected to the heater hose inlet hose. Dupont used to have a product that did the job but EPA took it off the market years past so the best I've found available now is a Bars Product #1211, 12 ounce 10 minutes flush for about $3.50. For what it does and the price, I put 2 cans in radiator and you can run this in any type radiator for a couple days if you want to. It does a great job and it won't damage any control valves, cc: rubber etc.

                          Answered on 1/25/2012 by Jim C from Franklinville, NC
                      • Q:

                        I am in the process of draining and flushing my Chevy 1500 5.7L. I have opened radiator drain AND taken both engine block drain plugs off to flush the system with water from the garden hose. I am now to the step of following the directions on the back of the Peak product.

                        Do I need to drain engine block plugs each time with these steps? Or is it OK to drain from radiator each time?
                        Asked on 11/4/2011 by Anonymous

                        1 answer

                        • CUSTOMER CARE

                          A:

                          It is not necessary to drain engine block plugs each time. It would be fair to drain from radiator.

                          Answered on 11/7/2011 by Vincent from AAP
                      • Q:

                        I followed the instructions on the bottle. Number 5 says, "For optimal cleaning...drive vehicle for 3 to 6 hours" with the cleaner in the radiator (along with water to top off the system).

                        I drove my car for 5 minutes, and the temperature gauge maxed out. I'm worried it may damage my engine. Is it normal for the engine to get so hot when running with the cleaner in it?
                        Asked on 10/23/2011 by Michael from Naples, FL

                        3 answers

                        • CUSTOMER CARE

                          A:

                          I would suggest taking your vehicle to a certified mechanic for a proper diagnosis.

                          Answered on 10/24/2011 by Aaron from AAP
                        • A:

                          Figured it out: Had topped off with water, but after running for 10 minutes, radiator had room for another 3/4 of a gallon. Peak might want to include an additional sentence reminding consumers to recheck fluid level after running engine for a little while.

                          Answered on 10/24/2011 by Michael from Naples, FL
                        • A:

                          common sense tells you to leave the cap off the radiator or the radiator overflow run the vehicle to normal operating temp and when water or coolant goes under where it should be to add more coolant or water fill it back to the correct level it should be at. This is called bleading the air pockets out of your cooling system. if there is air in the system like air in the brake system. It will not perform like it should. eather it will overheat cooling system.or it will not stop the vehicle brake system, and it could cause damage to your vehicle. if you dont know for sure how to work on it you should take it to repair shop where they are trained certified mechanics. or learn how to work on it yourself.

                          Answered on 4/14/2012 by common sense from ohio
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