Skip to main content

R1.10

Minor Versionm

by Rich Harris

Introduction

In this installation guide, we have provided step-by-step instructions to install the 27WON Performance Coolant Tank for 2023+ Type R and Type S

Advisory:

  • Coolant is very hot after vehicle operation. Allow the engine to fully cool down before beginning work
  • Coolant tank designed to fit both 1.5L and 2.0L turbo engine. Instructions for 2016-2021 Civic are separate
  • Fitment on RHD vehicles not yet confirmed
  • 2.0L naturally aspirated vehicles not yet confirmed
  1. First and foremost; THANK YOU for becoming a part of the 27WON Family.  We hope to REDEFINE your experience of the aftermarket with the highest level Parts, Customer Service, Packaging, & Support
    • First and foremost; THANK YOU for becoming a part of the 27WON Family. We hope to REDEFINE your experience of the aftermarket with the highest level Parts, Customer Service, Packaging, & Support

    • These instructions were written using a 2018 Honda Civic Si and a 2023 Civic Type R

    • 2.0L NA fitment has not been confirmed

    • These instructions are for 11th Gen Type R and Type S. 10th Generation Civic instructions are here: 27W-6-271 Coolant Tank - 10th Gen Civic

    • The 27WON coolant tank does not include a sight glass by design. These discolor and can be prone to leaking. Coolant level must be checked using the dip stick periodically

  2. Open the hood to access the OEM coolant tank
    • Open the hood to access the OEM coolant tank

  3. Use a 3/8" ratchet and 10mm socket to remove the 10mm bolt securing the A/C hardline Rotate the bracket up and out of the way to give you some room to work
    • Use a 3/8" ratchet and 10mm socket to remove the 10mm bolt securing the A/C hardline

    • Rotate the bracket up and out of the way to give you some room to work

  4. Use a 14mm socket and ratchet to remove the (3) 14mm bolts securing the side engine mount auxiliary bracket Remove bracket from the vehicle and set aside for reinstallation later
    • Use a 14mm socket and ratchet to remove the (3) 14mm bolts securing the side engine mount auxiliary bracket

    • Remove bracket from the vehicle and set aside for reinstallation later

  5. Use 10mm socket, ratchet, and extension to remove (2) 10mm bolts securing the coolant tank to its chassis brackets
    • Use 10mm socket, ratchet, and extension to remove (2) 10mm bolts securing the coolant tank to its chassis brackets

  6. 2018 Civic Si Shown. FL5/DE5 Similar
    • 2018 Civic Si Shown. FL5/DE5 Similar

    • Move coolant tank up and out of the chassis brackets as shown

    • Hoses will still be attached at this point

  7. Use a 3/8" ratchet and 10mm socket to remove (2) 10mm bolts securing the upper chassis tank bracket
    • Use a 3/8" ratchet and 10mm socket to remove (2) 10mm bolts securing the upper chassis tank bracket

    • You will not reinstall this bracket

  8. If you have a 27WON or aftermarket FSTB installed we suggest removing it at this time to create more space to get access to the back lower bracket. Use our install guide to remove your 27WON FSTB. This is not required but makes things easier Use a 3/8" ratchet and 10mm socket to remove (2) 10mm bolts securing the lower chassis tank bracket 3rd image shows bracket off vehicle to identify the location of the bolts
    • If you have a 27WON or aftermarket FSTB installed we suggest removing it at this time to create more space to get access to the back lower bracket. Use our install guide to remove your 27WON FSTB. This is not required but makes things easier

    • Use a 3/8" ratchet and 10mm socket to remove (2) 10mm bolts securing the lower chassis tank bracket

    • 3rd image shows bracket off vehicle to identify the location of the bolts

    • You will not reinstall this bracket later

  9. 2018 Civic Si Shown. FL5 and DE5 similar Use needle nose pliers to squeeze and slide back clamps on both upper and lower coolant hoses
    • 2018 Civic Si Shown. FL5 and DE5 similar

    • Use needle nose pliers to squeeze and slide back clamps on both upper and lower coolant hoses

  10. Use two vice grips with blue tape on the jaw ends to pinch off the coolant hoses. Put one on each hose about 3-6" away from the barb
    • Use two vice grips with blue tape on the jaw ends to pinch off the coolant hoses. Put one on each hose about 3-6" away from the barb

    • The blue tape helps to make sure the jaw does not cut into the hose

    • Pinching off the hoses helps keep coolant in the system and minimizes the mess and loss

  11. Using a slight twist and pulling motion at the same time pull the hoses off the coolant tank until each one pops off Use caution not to break coolant tank. Hose pliers are useful here
    • Using a slight twist and pulling motion at the same time pull the hoses off the coolant tank until each one pops off

    • Use caution not to break coolant tank. Hose pliers are useful here

    • Remove coolant tank from car

    • Keep the barbs as vertical as possible to avoid spilling coolant

    • Remove the loosened pinch style hose clamps from OE coolant lines

  12. A wiring loom is bolted to the engine that will not fit between the engine and the 27WON coolant tank Remove bolt securing wiring loom with a 10mm socket and ratchet Optional: Secure wiring loom out of the way with provided  Zip Tie
    • A wiring loom is bolted to the engine that will not fit between the engine and the 27WON coolant tank

    • Remove bolt securing wiring loom with a 10mm socket and ratchet

    • Optional: Secure wiring loom out of the way with provided Zip Tie

  13. 2018 Civic Si Shown. FL5 and DE5 similar This step needs to be updated. Upper fitting is similar but smaller. Lower fitting is 90 degree Special thread sealant is used with the NPT style fittings equipped on the 27WON tank. It may seem 'wet' during install. This is normal
    • 2018 Civic Si Shown. FL5 and DE5 similar

    • This step needs to be updated. Upper fitting is similar but smaller. Lower fitting is 90 degree

    • Special thread sealant is used with the NPT style fittings equipped on the 27WON tank. It may seem 'wet' during install. This is normal

    • Put the 27WON coolant tank in place and reinstall the coolant hoses over the two barbs and secure with provided clamps or OE clamps where possible

    • Make sure lower hose does not touch side motor mount bracket when it's installed later

    • Remove Vice-grips preventing coolant lines from leaking

  14. Two deep breaths. This part can be frustrating Setup lower mount hardware using spacer, washer, and 25mm long M6 bolt as shown
    • Two deep breaths. This part can be frustrating

    • Setup lower mount hardware using spacer, washer, and 25mm long M6 bolt as shown

    • Spacer bushing threads on to hold the hardware stack in place

    • Spacer Bushing

    • Lower Coolant tank into position

    • Use a small 10mm socket and 2" extension and fingers to start threading the lowest mount bolt

    • Use a small 10mm socket and 2.75" extension and fingers to start threading the higher lower mount bolt using provided 12mm long bolt and washer

    • Use your fingers to turn both bolts to finger tight

  15. Using a provided M6 washer and a 12mm long M6 flanged bolt, torque to snug down the upper mount bolt for the coolant tank The plane of this mount is at an odd angle. Use extra caution not to cross thread. Washer not shown
    • Using a provided M6 washer and a 12mm long M6 flanged bolt, torque to snug down the upper mount bolt for the coolant tank

    • The plane of this mount is at an odd angle. Use extra caution not to cross thread. Washer not shown

    • "torque to snug" is defined as 1/4 to 1/2 more rotation after setting resistance is felt

    • Torque to snug the top lower mount bolt for the coolant tank

    • Bolt and Washer not shown

    • Now torque to snug the lowest mount point for the coolant tank from the previous step

  16. "torque to snug" is defined as 1/4 to 1/2 more rotation after setting resistance is felt Reinstall the side engine mount bracket with (3) 14mm bolts removed earlier. Torque to snug Reinstall the A/C line bracket with the 10mm bolt. Torque to snug
    • "torque to snug" is defined as 1/4 to 1/2 more rotation after setting resistance is felt

    • Reinstall the side engine mount bracket with (3) 14mm bolts removed earlier. Torque to snug

    • Reinstall the A/C line bracket with the 10mm bolt. Torque to snug

  17. Drain whatever coolant remains in OE tank into 27WON tank Using a slight twist and pulling motion   to remove OEM overflow  hose by pulling hose to the side
    • Drain whatever coolant remains in OE tank into 27WON tank

    • Using a slight twist and pulling motion to remove OEM overflow hose by pulling hose to the side

    • Use caution not to break coolant tank. Hose pliers are useful here

    • Remove radiator cap from OEM tank by twisting the cap off

  18. Install OEM overflow hose onto 27WON tank by pushing it on barb as shown Use a Zip-tie to secure the hose to the barb and prevent leaks
    • Install OEM overflow hose onto 27WON tank by pushing it on barb as shown

    • Use a Zip-tie to secure the hose to the barb and prevent leaks

    • Make sure Zip-tie will not interfere with radiator cap

    • Zip-tie should slightly deform hose if it's tight enough

    • Clip Zip-tie

  19. Fully install OEM radiator cap on 27WON Coolant Tank Wipe clean OEM radiator cap and dry
    • Fully install OEM radiator cap on 27WON Coolant Tank

    • Wipe clean OEM radiator cap and dry

    • Apply provided sticker to radiator cap in desired orientation

    • Non-Type R shown. These have 1.1 bar caps

    • Type R and Type S have a 1.3 bar cap

  20. Add coolant to the appropriate level using the 27WON dipstick as a measuring guide. We suggest the use of Honda OEM coolant for your car The next step will show how to check coolant level with Dip Stick
    • Add coolant to the appropriate level using the 27WON dipstick as a measuring guide. We suggest the use of Honda OEM coolant for your car

    • The next step will show how to check coolant level with Dip Stick

    • Coolant on at least seven (7) threads is full. If there is no coolant on the Dip Stick then it is low

    • Add Coolant

    • Full Coolant

    • Don't fill coolant past threaded portion of dip stick

  21. Remove cap to add coolant Fully insert dip stick in the cap bung until it stops on bung
    • Remove cap to add coolant

    • Fully insert dip stick in the cap bung until it stops on bung

    • Remove dip stick and check coolant level

    • Add coolant to the appropriate level using the 27WON dipstick as a measuring guide

    • At least 7 threads is considered full, half of threaded section

    • Don't fill coolant past threaded portion of dip stick

    • If you can't find your Dip Stick you can check coolant level without it. Make sure coolant is to a depth of 2" give or take 1/4"

    • Wipe Dip Stick clean of coolant

  22. With the cap off the tank start up the car and bleed the system by allowing the car to get to an operating temperature of 170 degF before putting the cap back on
    • With the cap off the tank start up the car and bleed the system by allowing the car to get to an operating temperature of 170 degF before putting the cap back on

    • 170 degF is nearly warmed up

    • Monitor for leaks from your tank while warming up the car

    • If any leaks are discovered reach out to our customer service team for install assistance

  23. Your Dip Stick is designed as a key chain. You can store it there or holster it someplace else Anodized finish may get damaged by keys. This won't impact it's function
    • Your Dip Stick is designed as a key chain. You can store it there or holster it someplace else

    • Anodized finish may get damaged by keys. This won't impact it's function

    • Place dip stick where it will not be lost or cause any damage if it comes free

    • An automotive clip with 3M VHB adhesive is included

    • Wipe clean and dry area to stick

    • Press down gently to open the slit

    • Peel off tape liner and stick on a clean and flat surface then press clip firmly for 30 seconds

    • Wait 15 minutes before inserting Dip Stick for best result

  24. The 27WON coolant tank does not include a sight glass by design. These discolor and can be prone to leaking. Coolant level must be checked using the dip stick periodically. 27WON recommends checking coolant level during oil changes
    • The 27WON coolant tank does not include a sight glass by design. These discolor and can be prone to leaking. Coolant level must be checked using the dip stick periodically. 27WON recommends checking coolant level during oil changes

    • When possible, make sure car is cool before checking coolant level. Follow owners manual for removal of cap

    • Contents can be under pressure and extremely hot

    • Use provided keychain Dip Stick to check coolant levels as shown in step 20

    • No coolant on threads means coolant is low

    • Coolant on at least 7 threads is full

    • Don't fill coolant past threaded portion of dip stick

    • If you can't find your Dip Stick you can check coolant level without it. Make sure coolant is to a depth of 2" give or take 1/4"

  25. This completes the installation of your 27WON Performance Coolant Tank
    • This completes the installation of your 27WON Performance Coolant Tank

    • We hope you were impressed with your 27WON experience and love your new Coolant Tank for years to come. Email us at sales@27won.com or call us at 571-271-0271 with any questions or concerns

    • Please Leave a review here: https://store.27won.com/upgraded-coolant...

    • Share your experience using #27WON on Instagram and Facebook

Finish Line

Rich Harris

Member since: 08/03/2021

1,759 Reputation

7 Guides authored

Team

Builds Team Member of Builds Team

6 Members

14 Guides authored

0 Comments

Add Comment

View Statistics:

Past 24 Hours: 0

Past 7 Days: 2

Past 30 Days: 17

All Time: 63