Mk4 1.8T Coilpack “Conversion”

Alright everybody, I bought yet ANOTHER Volkswagen – My self hatred knows no bounds.

This is an unbelievably quick install. Twenty minutes tops for the most part!

Tools that are needed for the job!

  • Ten millimeter socket (and a socket wrench)
  • Five millimeter Allen key/Allen socket
  • Flat head Screwdriver

There are many different ways you can go about this install, I’ve seen some people do it by literally just throwing the 2.0t coilpacks which isn’t the best idea because the 2.0t coilpacks are taller than the stock 1.8t coilpacks and the rubber seal doesn’t connect with the engine. So if you don’t want to risk anything falling down into the hole with your sparkplug you’re going to need something!

I personally went with Integrated Engineering and their adapter set!

Integrated Engineering’s adapter set!

Now you could easily go with ECS or any other brand that’s out there. I’ve even seen some plastic ones that just sit in the bolt holes and do the same thing for way cheaper! I don’t know where to find those though!!

The reason for doing this is that Volkswagens original design is just kind of garbage for the 1.8T’s coilpacks. Here is a resource that I found useful while trying to hunt down my idle fluctuation useful! I decided that the upgrade to the 2.0t coilpacks were in my best interest because they’re an updated design and make the engine run smoother. They also offer a smoother delivery of power and the car felt younger after the install.

Actually starting the job: (I’ve added the photos in after completing the job on my own car)

Take the tools that are needed, keep them at the ready and open whatever packaging that your parts came in!

First you’ll take the engine cover off and you’ll be greeted by your possibly very stock engine bay (You can skip this step if you don’t have an engine cover anymore!)

Kindly yeet the engine cover away

Second you will want to take a look at the vacuum reservoir that is bolted above the right most Coilpack and take the nut off with your ten millimeter socket.

Red circle is where the ten millimeter bolt is!!!

Once the reservoir is out of your way you’ll be able to progress to the third step! Taking off the five Allen bolts from the vacuum reservoir mount! There are three of them on the mount, two on the left and one on the right. The back left bolt is slightly hidden.

Red Circles are where the 3 5 millimeter Allen bolts are!

The fourth step is to pop the connectors off of each of your coilpacks. You may need a screwdriver to make it work depending on the condition of your connectors!

Coilpack Connectors!

For the fifth step (This was needed for my install) was to unbolt the ground(?) wire for the coilpack connector harness from the valve cover. It’s the ten millimeter bolt between and behind the left two coilpacks.

After that you will take your adapter plates, put them in place and screw them into the bolt holes that are diagonal from one another while making sure that the lines that the coilpack gasket seats in are matching the ones on the valve cover for the sixth step!

The seventh step is just putting your new 2.0t coilpacks in, making sure they’re seated well! (In my video you can see me putting them in place starting at about 14 minutes)

For the eighth step you can tackle two things at once, plugging the coilpacks back into the harness and then putting the harness ground bolt back in and tightening it with the ten millimeter!

Step Nein is to enjoy the fruits of your labor and drive your Volkswagen with smoother throttle response and to have peace of mind!

Here’s my install video!

Thanks for reading and watching!!!

-Vince

Published by Vincent Wight Malatesta

I graduated from the College of Saint Rose in 2019. I’ve always loved cars! My Instagram's are clutchoutmedia, Vince_emkay6, and my personal is itsvincem.

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