Pressurized Coolant Reservoir
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Dorman - OE Solutions Pressurized Coolant Reservoir

Part No. 603-109 Warranty  

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Our Engine Coolant Recovery Tank is designed for enduring use. It resists the expansion and cracking that temperature fluctuation can cause. Plus, the durable plastic prevents coolant fluid loss.

Product Features:
  • Comes with reservoir cap
  • Level sensor included (where applicable)
  • Direct replacement for a proper fit every time
  • Quality tested to ensure trouble-free installation and performance
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Cap Included:Yes
Color/Finish:White
Material:Plastic
Mounting Hardware Included:No

REVIEW SNAPSHOT®

by PowerReviews
Dorman - OE SolutionsCoolant Reservoir
 
4.6

(based on 21 reviews)

Ratings Distribution

  • 5 Stars

     

    (16)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

95%

of respondents would recommend this to a friend.

Pros

  • Easy to install (19)
  • Durable (11)
  • Lightweight (7)

Cons

    Best Uses

    • Replacement (10)
    • Everyday driving (7)
      • Car & Truck:
      • Casual driver (3)
      • Reviewer Profile:
      • Casual driver (7), Auto enthusiast (6), Mechanic (5)

    Most Liked Positive Review

     

    resevior

    The part was exactly what I needed and had on the car I was having repaired. The construction of it seemed of good quality and lightweight. There was no problems when I had the...Read complete review

    The part was exactly what I needed and had on the car I was having repaired. The construction of it seemed of good quality and lightweight. There was no problems when I had the part installed on the car. What I really liked was that the part came complete( it had the drain hose and the cover). I had thought about going to the salvage yard and finding a used one, but when I called and got a quote, I decided to purchase it new from advance. From now on I will call Advance before I go to a junkyard. It was very convinient looking it up online, that really saves time and money. I was really satisfied with my purchase.

    VS

    Most Liked Negative Review

     

    Great Fit. Easy Install. Seam Leak.

    Installed to replace an original tank that developed a stripped cap. Fit perfect and was easy to install. Five months later, the tank developed a minute crack along the seam causing the unit...Read complete review

    Installed to replace an original tank that developed a stripped cap. Fit perfect and was easy to install. Five months later, the tank developed a minute crack along the seam causing the unit to lose fluid. Didn't see any evidence on the driveway, but had to replenish the expansion tank every three to four weeks. I can recommend this for a temporary replacement or back-up, but I wouldn't depend on this part for Long-Term usage.

    Reviewed by 21 customers

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    Displaying reviews 1-10

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    5.0

    Good Product

    By JJ

    from Raleigh NC

    About Me Auto Enthusiast, Mechanic

    Verified Buyer
    Level 1

    Pros

    • Durable
    • Easy To Install
    • Improves Engine Efficiency
    • Lightweight

    Cons

      Best Uses

        Comments about Dorman - OE Solutions Coolant Reservoir:

        Was an exact fit and solved my coolant leak problems instantly.

        Comment on this review(earn points)

         
        5.0

        Just as described

        By TommyRx

        from Blakeslee, Pa

        About Me Auto Enthusiast

        Ask me a question

        Verified Buyer
        3 or more reviews submitted

        Pros

        • Easy To Install

        Cons

          Best Uses

          • Replacement

          Comments about Dorman - OE Solutions Coolant Reservoir:

          exact fit

          Comment on this review(earn points)

           
          4.0

          A Good Product

          By Bob

          from Montvale, VA

          About Me Auto Enthusiast, Mechanic

          Verified Buyer

          Pros

          • Easy To Install

          Cons

            Best Uses

              Comments about Dorman - OE Solutions Coolant Reservoir:

              This coolant tank fit exactly to the OE tank and comes with radiator cap.

              Comment on this review(earn points)

               
              5.0

              Perfect Fit.

              By Ralph

              from Springfield, MA.

              About Me Auto Enthusiast

              Verified Buyer
              Level 1

              Pros

              • Easy To Install

              Cons

                Best Uses

                • Replacement

                Comments about Dorman - OE Solutions Coolant Reservoir:

                Better than OEM and excellent price too.

                Comment on this review(earn points)

                 
                5.0

                Perfect Fit!

                By Beastwerks

                from Louisville, KY

                About Me Mechanic

                Ask me a question

                Verified Buyer
                3 or more reviews submitted

                Pros

                • Durable
                • Easy To Install

                Cons

                  Best Uses

                  • Replacement

                  Comments about Dorman - OE Solutions Coolant Reservoir:

                  I was expecting to have to order this item when my Daughter described what was leaking on her car. Since I found it readily IN-STOCK, this is a high-failure item & likely used on a series of similar vehicles, so rather than having to waste time performing a temporary repair, I ordered it online & had it waiting for me that evening at the local store.
                  Car was back to normal that day!
                  Great props to Advance for having the product but a thumbs down for GM & their lousy original design!

                  Comment on this review(earn points)

                  (1 of 2 customers found this review helpful)

                   
                  5.0

                  Very Easy to Install

                  By average Dave home mechanic

                  from Maineville, OH

                  About Me Casual Driver

                  Verified Buyer
                  Level 1

                  Pros

                  • Durable
                  • Easy To Install
                  • Solved Overheating Issue

                  Cons

                  • none

                  Best Uses

                  • Replacement

                  Comments about Dorman - OE Solutions Coolant Reservoir:

                  Easy to order on-line and pick-up at the nearest store. Part was exact fit replacement as stated in the on-line ordering section. Easiest part ever to replace except maybe an air filter. Product is light and easy to handle and appears to be constructed to last. This was a fairly inexpensive fix for the overheating problem due to coolant loss from poorly threaded original cap. I would recommend this part to anyone. I do not have one complaint or bad thing to say about this replacement part. Impressive easy fix!

                  Comment on this review(earn points)

                  (0 of 1 customers found this review helpful)

                   
                  5.0

                  Exact OEM configuration Cap Included

                  By Johnny Racer

                  from Rochester,NY

                  About Me Auto Enthusiast, Mechanic

                  Verified Buyer
                  Level 1

                  Pros

                  • Easy To Install

                  Cons

                    Best Uses

                      Comments about Dorman - OE Solutions Coolant Reservoir:

                      When PROMO/Coupon Codes are used, many products at Advance are exceptional value.

                      Comment on this review(earn points)

                      (1 of 2 customers found this review helpful)

                       
                      5.0

                      Fit my 2001 Pontiac Sunfire

                      By J.Cannon

                      from Alabama

                      About Me Casual Driver

                      Verified Buyer
                      Level 1

                      Pros

                      • Durable
                      • Easy To Install
                      • Lightweight

                      Cons

                        Best Uses

                        • Everyday Driving

                        Comments about Dorman - OE Solutions Coolant Reservoir:

                        Worked well for my 2001 Pontiac Sunfire. Did not take long to install. Has been in use for almost a month and I have not had any problems out of it so far.

                        Comment on this review(earn points)

                        (1 of 2 customers found this review helpful)

                         
                        5.0

                        Easy Install

                        By JJ

                        from Benton Harbor, MI

                        About Me Casual Driver

                        Verified Buyer
                        Level 1

                        Pros

                        • Durable
                        • Easy To Install

                        Cons

                          Best Uses

                          • Everyday Driving

                          Comments about Dorman - OE Solutions Coolant Reservoir:

                          Light weight

                          Comment on this review(earn points)

                          (1 of 2 customers found this review helpful)

                           
                          4.0

                          Great buy

                          By EC64

                          from Apollo Beach, Florida

                          About Me Casual Driver

                          Verified Buyer
                          Level 1

                          Pros

                          • Durable
                          • Easy To Install
                          • Lightweight

                          Cons

                          • none

                          Best Uses

                          • Everyday Driving
                          • Replacement

                          Comments about Dorman - OE Solutions Coolant Reservoir:

                          just a replacement part, perfect fit

                          Comment on this review(earn points)

                          Displaying reviews 1-10

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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.

                          7 Questions | 9 Answers
                          Displaying questions 1-7
                          • Q:

                            what are the part numbers of all the hoses that connect to this coolant reservoir? I have a 1999 Pontiac grand am gt.
                            Asked on 7/9/2014 by warpig

                            1 answer

                            • CUSTOMER CARE

                              A:

                              Hi Warpig, glad to assist you! We do not offer the hose that connect to this coolant reservoir separately. I would recommend that you check with the nearest Advance store and one of our parts pros will be glad to assist you with an alternate availability.

                              Answered on 7/10/2014 by Vincent from AAP
                          • Q:

                            Does the reservoir alwasy have to be full?
                            Asked on 9/21/2013 by Manny

                            1 answer

                            • CUSTOMER CARE

                              A:

                              With reference to your inquiry on the Dorman - OE Solutions Coolant Reservoir -part# 603-109, the coolant reservoir tank should always be a minimum of 1/2 full when the engine is cold. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                              Answered on 9/22/2013 by Vincent from AAP
                          • Q:

                            the black hose that is pictured with the reservoir, is it suppose to be attached to something other than the reservoir?
                            Asked on 5/23/2012 by Anonymous

                            1 answer

                            • CUSTOMER CARE

                              A:

                              The tube does not attach anywhere, it is there to route antifreeze out of the tank if your pressure exceeds. It is used as a relief for the coolant in your radiator. Either pressure or excess fluid will spill from there.

                              Answered on 5/23/2012 by Steve from AAP
                          • Q:

                            if u put nothing but water into tank,would that cause your tank to bust
                            Asked on 8/4/2011 by Anonymous

                            2 answers

                            • CUSTOMER CARE

                              A:

                              No, but can cause scaling in the engine and can cause corrosion in the engine.

                              Answered on 8/5/2011 by DIY Daniel from AAP
                            • A:

                              If the air temp outside is below freezing, it may likely cause your overflow tank to "bust". You should NEVER put just straight water (unmixed with antifreeze) into your coolant overflow tank OR the radiator. An emergency would be the only time to use just water. Fully drain and add a 50/50 mix as soon as possible after such an emergency situation. Adding water to a vehicle's cooling system will cause coolant dilution, leading to problems. In colder temps, particularly those below freezing, ice can form in the cooling system, leading to the potential for a cracked/ruined engine block, a ruined radiator, a ruined overflow tank, a ruined heater core, shorten the life of the water pump, and could ruin anything pertaining to the cooling system. In warmer ambient (outdoor air) temps, straight water will create internal rusting, scaling, & a lower boiling point for the coolant system. This may lead to engine overheating due to boiling of the straight water or a heavily diluted coolant mix.

                              Answered on 9/29/2011 by Andy, Prof. Mechanic & Ex AAP Parts Pro from Ontario, NY
                          • Q:

                            if this tank has a leak in it will it cause my car overheat
                            Asked on 6/22/2011 by Anonymous

                            2 answers

                            • A:

                              Yes it will, I had to replace mine twice because of leak.If you have a leak replace it ASAP!!

                              Answered on 6/26/2012 by Chocolatesista from Woodridge IL
                            • CUSTOMER CARE

                              A:

                              Yes, a leak in coolant recovery tank may cause your car overheat.

                              Answered on 6/28/2011 by Vincent from AAP
                          • Q:

                            hello i wanted to know what exactly does this tank do?
                            Asked on 6/8/2011 by ed from miami,FL

                            1 answer

                            • CUSTOMER CARE

                              A:

                              The coolant reservoir is a container that holds the excess or overflowing coolant, fluid or cooling agent which is used in the cooling system.

                              Answered on 6/20/2011 by Vincent from AAP
                          • Q:

                            all i need is the cap,when i unscreed the cap a piece of it remained, can i remove it or do i need a new cap.it looked like a disc. r graf
                            Asked on 1/16/2011 by r graf from denton texas

                            1 answer

                            • CUSTOMER CARE

                              A:

                              There is nothing wrong with the gasket coming off the cap, some people however would replace it because you may forget and pull the cap off and the gasket fall to the ground, then you would have a problem. Hope this helps

                              Answered on 1/18/2011 by Brandon
                          Displaying questions 1-7

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