HVAC Cavity Drain Holes

In the last year, we have seen a few Elise/Exige cars with drain holes that were either not drilled or not fully drilled out.  We would encourage you to inspect your car to confirm that the holes were drilled correctly.  Your fan blower is in jeopordy of failing if this is not done.

What?

The S2 Elise and Exige should have drain holes drilled into the chassis.  This was a Dealer installed Technical Service Bulletin 2007/01 issued by Lotus Cars.  The TSB is posted at the end of this Blog post.

Why?

These holes allow water to drain from the HVAC cavity.  If water is allowed to collect in this space, the electronics for the blower will begin to corrode and then fail.

How?

At the front of your chassis you can inspect to see if these holes are present.  Take a 6mm rod and see if it will go all the way into the cavity.  If not, you can drill it yourself with a 6mm drill bit.  Note the 10mm limiter suggested by the TSB below.