The BEGi Miata
Coolant Re-Route System
Installation and Operations Manual
Applicable to all 1989 to 2005
Mazda Miatas
Revised 3-18-11
Version 1.2
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Thank you for purchasing this system. We regard your installation as a mutual project and will be pleased to
offer help at any time. We remain committed to make this a successful and enjoyable experience for all
concerned. If any questions arise in the process of installation, please feel free to call BEGi for assistance.
The success of this installation will be determined by a variety of factors. These instructions should be adhered
to unless reasonable cause for deviation exists. The vehicle must be in excellent condition and proper tune
prior to starting the installation. Care and attention to detail by the installer are of extreme importance. The
daily operator of the vehicle must become familiar with, and observe all operational guidelines.
It is not necessary that the installer has any previous experience with forced induction. The mechanical skills
required for a successful install are roughly equivalent to that needed to properly remove and replace the
exhaust header and tailpipe. If one has no mechanical experience, it is strongly suggested that help be sought
from a hobbyist or professional mechanic.
Clean and inspect all components of this assembly, as BEGi accepts no responsibility for cleanliness. All
components will be cleaned prior to shipment, however, the cleanliness standards of the installer override all
others. BEGi also does not guarantee the fit of any other manufacturers parts when used in conjunction with
our systems. All components should be inventoried with respect to the packing lists. Shortages will not be
honored in excess of twenty days after the shipping date.
Prior to starting the installation, fill the fuel tank with gasoline of 93 octane. Do not dilute with lesser octane
fuel already in the tank. it is critical to have the correct octane fuel when testing the finished installation for
the absence of knock.
All left or right directional references will be from the driver viewpoint. For example, the turbo mounts on
the left side. If clarification of these instructions is required, please call BEGi at 830-438-2890. Suggestions
for improvements of these instructions are welcome. Send an e-mail to [email protected]. Or, write
notes on the instruction set and mail / fax to: BEGi, 203 Kestrel Dr., Spring Branch, Texas. 78070. Fax: 530438-8361
These instructions and the operational requirements for this system must be reviewed with the owner-driver
prior to delivery of the vehicle to the end user. Please read the statement of warranty at the end of these
instructions prior to starting the installation.
THE INSTALLER SHOULD PASS THESE INSTRUCTIONS
ON TO THE OWNER-DRIVER
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Tool and Equipment Requirements
The following tools and equipment will be required to conveniently accomplish this install:
General metric open/box wrenches
Floor jack
General SAE open/box wrenches
Jack stands x 4
Assorted slot and phillips screw drivers
Clean rags
General metric socket set
Factory shop manual or equivalent is recommended
Preliminary
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A clean engine is pleasant to work on. If needed, wash both top side and bottom very thoroughly. The
high pressure car wash does a good job. Wearing latex gloves can help keep the installer as clean as
a nice engine.
Position the car on jack stands, high enough to work conveniently beneath the car.
Drain the engine coolant. DO NOT DRAIN THE OIL.
Installation of Parts
Re-Routing the Heater Hose:
The heater hose located on the firewall, that originally went down beneath the exhaust manifold, will be rerouted to the hose barb on the lower coolant tube. This is the hose located closest to the brake vacuum unit
for left hand drive cars.
Loosen the hose at the firewall and remove. Cut the hose to create a right angle segment. Place this segment
back onto the tube at the firewall and secure with the original clamps. Point the end of the hose inward to the
right side of the car (passenger side). Refer to picture # 1.
Place the size SAE 6 hose clamp onto the end of the hose and push it upward. Insert the splice, and lower the
clamp to cover the hose end and splice. Fasten securely. Refer to picture # 1.
Figure # 1
Figure # 2
Place a size SAE 6 hose clamp onto the end of the 5/8" hose. Push this assembly onto the open end of the
splice. Push the hose clamp up to the hose end covering the splice. Fasten securely. Refer to picture # 1.
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Route the 5/8" hose behind the engine securing it closer to the firewall with zip ties. Then turn the hose
forward and run it parallel to the intake manifold. Lay the hose to the side for now. It will be installed after
the coolant re-route splice. Refer to figure # 2.
Figure # 3
Figure # 4
Coolant Re-Route Splice:
Place the splice next to the upper radiator hose. Line it up on the straight portion of the hose. Mark the radiator
hose to cut out about 7/8". Place a drain pan below the upper radiator hose. Some spillage may occur. Set the
splice aside and cut the marked section on the hose with a saw blade or box cutter. Place an SAE 20 hose
clamp over each end of the open hose. Insert the splice into open ends of the radiator hose. Move the clamps
over to cover the ends of the splice and tighten securely. Refer to figure # 3.
Locate the 5/8 Heater hose just set aside. Place a SAE 6 hose clamp over the end and push it onto the hose
barb on the Coolant Re-route splice. Push the hose clamp up to cover the hose and hose barb. Tighten hose
clamp. Refer to picture # 4.
Protecting the Heater Hoses:
Cut the 18" x 5" piece of Heat Wrap fabric into 2 long strips. Make the strips about 18" x 2.5". Cut the safety
wire into about 15 pieces about 4" long. Wrap both of the heater hoses with the heat wrap fabric. Secure with
cut pieces of safety wire. Refer to figure # 5.
Figure # 5
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Picture # 6
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Plug the Coolant Line:
The hardline for the coolant that runs under the exhaust manifold will need to be plugged. Slide the short piece
of 5/8" rubber hose over the end of the hard line. Slide an SAE 8 clamp over the end and tighten. Slide the
second SAE 8 hose clamp over the end of the rubber line and leave loose for now. Insert the coolant line plug
into the end of the 5/8” hose. Push in all the way. Slide the clamp over the end of the plug and rubber line.
Tighten the hose clamp. Refer to picture # 6.
Testing Procedures
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Refill the engine coolant.
Start the engine and check for coolant leaks. Correct as required.
Drive the car a few miles prior to applying boost. If all systems are operating normally, proceed with
the testing. Generally use 3rd or 4th gears to keep events at a slower pace. Apply boost in small
increments at a time such that no sudden changes occur.
Review the instructions and installation for any details overlooked and correct as required.
General Rules of Operation
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Check coolant levels regularly.
The car will take slightly longer than before to reach operating temperature. That is normal due to the
coolant re-route.
It is the responsibility of the installer to review these general rules of operation with the owner/driver.
Warranty Information
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All items made by BEGi are warranted for workmanship and function for one year from the date of
receipt. All other items are subject to manufacturer’s warranty.
If problems arise from using a BEGi part in a manner other than intended, or a part is installed
incorrectly, BEGi reserves the right to refuse warranty coverage for damages.
BEGi will not warranty any kits, parts or items purchased thru an online auction that is not purchased
from an authorized dealer. The customer must be able to provide proof of purchase for any warranty
repairs.
BEGi reserves the right to inspect any item before any warranty will be granted. BEGi will not
reimburse for any labor charges on warranty items that occur without prior, written consent.
BEGi extends no warranty nor accepts liability to any original, stock, or replacement components on
the vehicle.
BEGi does not pay any towing expenses.
Warranty may transfer. BEGi must be notified within twenty days of sale to continue warranty
coverage.
Shipping / freight charges are the responsibility of the end user for all warranty consideration.
Terms of Sale
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All shortages from the parts list must be reported to BEGi within 20 days of receipt.
BEGi does not pay any towing expenses.
All returned items are subject to a 25% re-stocking fee.
BEGi accepts no liability for death or injury to any person or persons under any circumstance.
The re-seller assumes all responsibility for the end user’s knowledge of this warranty.
BEGi does not guarantee that turbo kits will pass smog tests. For California residents, some BEGI kits
have been provided a C.A.R.B. Executive Order Number. However, BEGi does not guarantee that the
end user’s car will pass.
Acceptance, re-sell, or use of any BEGi part constitutes full agreement by the re-seller/end user, that
the terms of sale and warranty are fully understood and accepted in full.
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