The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Installing New Hood to Cowl Seal Question

Andy4639 · 05-15-2016, 04:04 PM

A easy mod is do away with that flapper under the cowl. Take all of it out vacuum flapper rod springs all of it. Seal it off good and tight. The AC will get colder after you have driven it a while because no fresh air is getting inside the cab. And if you do want some fresh air just pull the drivers side vent open a little.
Always leave the passenger side vent open and it is recirculating the cab air so it will get plenty cool after a nice long ride.
I did mine when I bought all the new 134A stuff and I'm telling you it's worth the time.

05-15-2016, 04:04 PM	#25
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Installing New Hood to Cowl Seal Question A easy mod is do away with that flapper under the cowl. Take all of it out vacuum flapper rod springs all of it. Seal it off good and tight. The AC will get colder after you have driven it a while because no fresh air is getting inside the cab. And if you do want some fresh air just pull the drivers side vent open a little. Always leave the passenger side vent open and it is recirculating the cab air so it will get plenty cool after a nice long ride. I did mine when I bought all the new 134A stuff and I'm telling you it's worth the time. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.