GT-R GReddy Twin Turbos Upgrade Article
Speed For Sale LLC
Email: [email protected]
Location area: Atlanta, Georgia, USA
SpeedForSale.com’s Installation Guide Series:
GReddy TD06-20G Twin Turbos for 2009 GT-R
THIS ‘GReddy TD06-20G Twin Turbo Package’ CAN BE PURCHASED HERE:
YOU CAN ALSO VIEW OUR ‘STAGED POWER UPGRADES’ HERE:
Article written by Jared Pink with the help of Chinchi Chiang. Article revised and
converted to PDF by Jeremy Blackwell.
Around 30 hours (including pulling the engine) depending on experience and tools
This is an installation article that shows you how to remove the engine, install the
GReddy Twin Turbo upgrade kit, and reinstall the engine. This article is to be used as a
supplement to the instructions included with the turbo kit, which can be a bit confusing
and does not have color pictures.
• YOU WILL NEED ALL THE TOOLS LISTED IN THE ENGINE REMOVAL
ARTICLE, WHICH YOU CAN FIND THE LINK TO BELOW!
• Sockets 10 mm, 12mm, 14mm, 17mm
• 6” extension
• 45 degree pliers
• E8 Torx
• Wrench 10mm, 12mm, 14mm, 17mm wrench
This article will show you how to remove the stock turbochargers and install the GReddy
Twin Turbo kit. However, you will also need to download our ‘GT-R Engine Removal
and Reinstallation’ article, which can be found here:
Remove the hard pipe to turbo inlet pipe from the intake hose. Do this by
removing 2 10mm bolts from the pipe, and removing the hose from the valve cover.
Remove the turbo outlet hard pipe. Remove the 12mm bolt on the stay. Loosen
the hose clamps from the turbo and remove the 10mm nut from the wire harness stay.
Remove the turbo suction pipe by remove 2 12mm nuts, and the actuator
reference hose from the plastic retaining clip.
Remove the head shields from the turbos. (9 10mm bolts per side)
Remove the A/F sensor connectors from the wire harness. Spray the exhaust nuts
with PB blaster or other quality rust penetrant. Remove the 5 14 mm exhaust nuts.
Remove the 14mm nut from the down pipe stay. And then remove the downpipes from
Remove the actuator boost reference lines from the actuators
Remove the oil return lines by loosening the clamp and removing 10mm bolt
Remove the 17mm coolant banjo bolt from block
Remove the coolant return by disconnecting the 2 rubber lines and 1 10mm bolt
on stay. Note that you will curl the upper coolant line over and reconnect where second
return came into the metal pipe to bypass the watercooling on the greddy
Remove 17mm oil pressure feed from the back of cylinder head
Remove the 6 14mm nuts to release the manifold. Slowly lift away from engine.
Using a E8 torx bit to remove the OEM studs from cylinder head
Install new stainless steel studs in head by using the lock nut method. Thread one
nut onto the stud by finger, and then thread a second nut onto the stud. Once they make
contact they will lock and allow you to install the stud.
using the provided M12 bolt and cooper washer plug the old coolant feed on the
block.. (as cheap insurance, use liquid thread sealant on the bolts).
For the oil feed line, using the supplied fittings and cooper washer, install into the
pressure feed at the back of the engine. Use a light coating of liquid thread sealer as
insurance against leaks.
Set new manifold in place. Finger tighten the bolts.
Following the Greddy instructions, apply the reflective heat shield to the bell
NOTE: When you prepare to install the waste gate, make sure that both reference
ports are not blocked. They come preclocked from greddy and can only install one way.
Install the waste gates to the manifolds using the studs and nuts provided. Only tighten
finger tight to allow for alignment.
Prepare the turbo for installation. Install the oil feed banjo with copper washers
and gently tighten the oil feed line. The line will “go away” from the engine. For the oil
return, gently apply a thin coating of FIPG material to the gasket for a leak free seal.
Install the studs into the manifold for turbo mounting. Mount the turbo and tighten
the nuts finger tight.
Connect the oil feed to the block. Also install the oil return line to the greddy
Install the down pipe to the turbo and the waste gate. It is easier to start the 4 bolts
for the waste gate and then tighten to the turbo. Once you ensure there is no interference
with the engine, you can tighten the nut and bolt hardware.
Install the stay for the waste gate and down pipe to the bell housing.
Install the discharge pipe, with smallest reducer hose, with #32 clamp
Install the crank case fitting to the turbo inlet pipe, use thread sealant for leak free
Install the turbo inlet pipe using the large reducer coupler with #48, #44 clamps
Using the provided hose to install the turbo breather, using small clamps.
Install the o2 senor back to the downpipes, make sure to use anti-seize on the o2
sensor thread. Heat wrap the o2 sensor wire to prevent from melting.
Note for driver side installation: The transmission coolant bracket will need to be
removed to clear the waste gate.. Be sure to provide ample temperature with provided
heat reflection material.
If you wish to bypass the coolant for the throttle bodies, on the drivers side you
can route the coolant line like this.