Please read the installation procedure listed below as it will save you time (and possibly parts) in the long run. After installation…enjoy! Caution! Be aware that E-PROM’s are static-sensitive devices, and so are the chips in your control unit. Avoid replacing chips in high static areas, and avoid touching the pins of any integrated circuit / E-PROM.
1. Open hood and remove the rubber seal laying on the top edge of the firewall. Remove the plastic raintray and locate the control unit. It is located on the driver’s side on Golf and Jetta 2 models, the passenger side on Passat and A3 models.
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Materials:
(1) Plastic Epoxy (fast setting type) I used Loctite Plastic Epoxy (sets in 7 minutes)
(2) 1 foot of ¾ inch (ID) radiator/heater hose. You only need about 3” but this is the minimum you could buy at the Autozone.
(3) Heater connectors (see below) I got mine from the Autozone, but you could use a similar item I guess. These fit perfectly in the existing hole on the valve which is handy… just as an fyi. (Help part number: 47065)
(4) Minimum Two hose clamps sized for the heater hose. You can get more if you want to clamp everything down, like I did.
(5) Some carburator cleaner.
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