Originally Posted by Kent1999
My non-z51 manual transmission C7's rear vents are both functional -- now
Adding the missing ducting is only about $60 total for converting both sides. True, there are no coolers
in the ducting, but it does route air from the top of the fenders back to the low pressure area in the rear grilles.
Is the airflow needed
? Probably not, but I don't like vents that are blocked/go nowhere.
Originally Posted by shakinrock
Could you describe in detail how you completed this?
When you lay out the steps, it sounds kinda complex but its really pretty easy -- took me about 2 hours total to complete, and that includes doing both sides (I have a non-Z51, manual trans, US-spec C7, so my car needed to have the ducts installed on BOTH sides). And that is me never having removed the rear fascia before -- I could do it quicker now if I ever had to do it again.
The processes for rear bumper cover and fender removal are already detailed here on the Forum, so I'll just give the steps overview:
11546449 NUT, FLANGED 6MM --5@$3.50 ea.
23200060 BAFFLE, Differential lubrication 1@$30
22792720 BAFFLE, Transmission oil cooler 1@$32
*if you have an automatic transmission, you already have the transmission baffle in place -- no need to buy the baffle or remove drivers side fender.
*you'll need five (5) of the 6mm nuts if you are going to do both sides. You can use standard 6mm nuts and washers from the hardware store, and it will be cheaper. I bought the genuine GM nuts because I am funny that way.
1) Unbolt rear bumper fascia and then tilt it back and rest it on a box directy behind the car. You can save time and effort by NOT disconnecting the hatch release wire for this, no need to as you are just disconnecting the bumper and resting it nearly in place.
2) Unbolt and remove rear fenders. NOTE: If you have an automatic, you already have the driver side baffle/duct in place, so you do not need to remove the driver's side fender.
3) Remove the flimsy plastic vent blocking plates from the underside of the fender top vents by removing 2 nuts, removing the flap, and then replacing the nuts. The actual fender top vents are the same for all Stingray coupes, so they do not have to be replaced.
4) Bolt in OEM ducts -- these are about $30 per side from any discounting dealer. Mounting studs are already in place, so you simply attach the vents using 6mm nuts (2 on the passenger side, 3 on the drivers side.)
5) Reattach fenders and rear bumper cover.
Done. The top fender vents are now fully functional, as they now duct air from the tops of the fenders back to the low pressure area in the rear of the car.