EQT Coil Grounding Kit (CGK) for EA888.3
ROW Now supported - See Fitment Notes
The EQT Coil Grounding Kit (CGK) is designed and engineered to provide a simple solution for a common problem on the MQB EA888.3 Platform.
The factory cam cover is soft aluminum and is prone to stripping regardless of how careful you are when removing or installing the OE stud. Your ignition coil uses this stud to ground the coil circuit and any amount of damage can occur in a weak ground which may induce unnecessary knock retard or reduced spark energy, even if the threads are only mildly damaged.
The bolt is often removed and installed when servicing the ignition system or performing engine testing. Such as replacing spark plugs, ignition coils, performing compression, or a leak down test, etc.
VWAG in their infinite wisdom also uses oval bolts which exacerbates the problem the more times they're removed and installed.
By isolating the ignition coil ground to its own circuit and grounding it to the chassis, the need to remove the top nut is no longer necessary and the risk of having a weak, loose, or damaged ground is removed.
While you still need to remove the stud in order to remove the ignition coils, you don't need to "double nut" it anymore in order to ground the circuit -- preventing the chance of a weak circuit.
Without the need for a stud on top of the bolt, you can easily replace your existing hardware with round M6x1.0 thread pitch bolts instead of the OE oval hardware.
OE Hardware is N91229201 and measures 45mm UHL (Under Head Length) and 12mm OHL (Over Head Length). To replace this stud with an appropriate size bolt you would want M6x1.0 x 45mm. You may also use a 40mm length if you chose. There is sufficient thread engagement to hold the coils securely
For a Hex Cap screw check out McMaster Carr Part #91292A142
High-Quality Construction Materials:
This Coil Grounding Kit (CGK) is constructed of only the highest quality materials including the following:
- 14AWG and 8AWG M22759/32 Tefzel Wire
- Raychem SCL Heat Shrink
- Raychem DR-25 Protective Sleeving
- 18-8 Stainless Steel M6 Hardware
- M6 Bore Tin-Plated Copper Ring Terminals
Each kit is assembled by hand in the USA to ensure the highest level of quality control.
Installation Instructions with High-Resolution images and clear steps
1 x Precision Made Coil Grounding Harness
4 x M6 x 1.0 x 8mm Stainless Steel Hex Cap Screws
4 x M6 x 1.0 Stainless Steel Flat Washers
Standard Kit Vs. Pro-Kit:
Includes M6 stainless hardware to attach the harness to your existing OE coil pack ground wires. **This is the easiest method of installation and is easily hidden under the factory plastic wire loom and engine over
Pro-Kit: Does NOT include M6 Hardware as a method of attachment. Instead, the CGK is terminated into OEM 3.5 Series terminals with an amp seal which replaces the factory grounding wire entirely. **This installation method requires pinning and depinning of the factory connector and is covered in detail within the installation instructions.
The Pro-Kit also allows you the option to replace any damaged OE coil pack connectors with new factory connectors (OEM PN: 4D0 971 994) which is also fairly common on this engine. Detailed instructions are provided with the pin assignment and wire colors to aid in this process.
All MQB EA888.3 Powered vehicles and EA888.4 8Y S3 with 4D0 971 994 coil pack connector. Verify which plug your vehicle has before purchasing.
- GTI/GTI & Golf R - Utilize the Grounding Lug behind the passenger Headlight
- A3/S3 - Grounding lug is located behind the passenger headlight on the frame, closest towards the fender. You may also utilize the M6 threaded hole on the engine mount if the grounding lug is not easily accessible
- 8Y A3/S3 - You may want to route the grounding lug to the driver side and utilize the OE chassis grounding location near the rear of the battery.
- Mk8 - Fitment confirmed. Same as Mk7/Mk7.5
REST OF WORLD - With connector 8K0 971 994 require the ROW CGK and will not work with the NAR Variant.
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