Jim85IROC

iTrader: (2)

Hi all,
I've seen the threads on using the 4th gen coolant overflow tank, but that won't work with the stock GTA airbox, which I didn't want to move/modify. Since I'm not running a charcoal canister, I wanted something that would work in that location. The answer came from Dorman, who sells a universal overflow tank under part number 603-001.


Due to the size limitations, I didn't want to use the nipple that was sticking straight out of the bottom of the reservoir, so I cut that off and inserted a concoction that I put together from the plumbing isle at Home Depot. I wanted a 1 piece 90* fitting that was threaded on one end and had a 3/8 slip-on hose fitting on the other end, but Home Depot didn't have any. Of course, after I finished this project, I found exactly what I was looking for somewhere else, but I digress. I wound up using a 3/8 elbow, a pipe-thread to slip on hose fitting adapter, and used a 3/8 to 1/2" pipe adapter that I cut the threads off of to use as a nut.

Here's a picture of the parts:


Here's the stuff all installed. On the inside I used RTV sealant to ensure that the tank doesn't leak:


Here's the passenger side area where the airbox and the tank go:


Here it is with the lower airbox/smog pump mount installed:


Here's the air filter housing and the tank set into place for pre-fitment:


I drilled 2 holes in the fender support and used the removable-style plastic fasteners:


Here's a pic from another angle:


Added a new 3/8" line from the radiator to the bottom of the tank and it's all done:


In case you were wondering, the stock overflow tank cap fits the new bottle perfectly, so it winds up making a very stock-appearing installation that is completely reversible in case the car ever needs to have the charcoal canister put back in.

MeenZ28

Nice job! I really think that is a great idea!

Base91

iTrader: (1)

Very neat. Job well done.

robertfrank

iTrader: (27)

I used the smaller one from Vatozone and hide it under the cover in front of the radiator. Loks good.

The Project

iTrader: (6)

Very nice and clean

FSTFBDY

iTrader: (33)

Looks great Jim. very nice stock appearing touch.

DAVECS1

iTrader: (2)

That's a slick idea. Here is how I did mine a couple years back, when I switched to a single plane efi.

6SIX6

iTrader: (35)

I might have to do this over the winter as I plan on making a turbo kit for the car and will need to move the battery and 4th gen bottle im sure of it

89blues

iTrader: (1)

Did you have to make that bracket that mounts over the rad?