The catch tank is mounted on the left-hand-side above the shock absorber. It is not covered at all by the new manual (v1.2), therefore the only reference to the procedure I have was in the old manual (2015c).

UPDATE – The v2.0 manual does cover the hose installation, but not the catch tank installation.

Fitting the bracket involves drilling out one rivet and drilling one new hole.

  • Drill choice
  • Electric drill won’t fit
  • Air drill used

The problem is, that even my smallest electric drill just doesn’t fit within the chassis rails, so it seemed like a good time to break out the air drill. When doing jobs like this, I alway use new drill bits; the risk of broken bits and damage to the delicate skin of the car is just too high. I should know, because I have been there in the past.

  • Drill out the front rivet
  • Mark the second hole
  • Both holes drilled

Once I removed the front rivet, I used the catch tank bracket to mark the and drill the second hole. I took the opportunity to touch the paint up after drilling the holes with POR15 chassis paint and to fill the chassis tube with ACF50 anti rust oil.

  • Bracket ready to rivet
  • Manual riveter used
  • Bracket fitted

I could not get my air pop riveter in the space between the chassis tubes, so I used the manual pop rivet tool. Just make sure you get the bracket the right way up. In the photo, it looks like I left green masking tape behind the bracket, but actually it’s just a reflection.

Catch tank test fit

When I visited the Caterham Cars factory, I observed the location used for the breather from the dry sump tank going to the catch tank. Caterham route the breather into the front corner, so that’s what I did.

  • Mark the hole to drill
  • Drilled as large as I can
  • Dremel finished the job
  • Breather hose fitted

I started by marking the location I wanted for the hose to enter the catch tank, then I drilled the tank with larger and larger drills until I could fit my Dremel. The Dremel finished the job opening out the hole until the silicon hose was a tight fit without distortion.

  • Breather hose fitted to dry sump tank
  • Catch tank fitted

I re-fitted catch tank and connected the silicone hose to the dry sump tank, making sure the hose doesn’t touch the bottom of the catch tank i.e. blocking the breather. Lastly I removed the small clear tube and routed the catch tank cap hose, as observed at the Caterham factory.

Tools Used

  • Air drill
  • Electric drill
  • Centre punch
  • Hammer
  • Knife
  • Side cutters
  • Pop riveter
  • Dremel