# Bypassing air conditioner pro m cons **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** airconditioning\ **Created:** [June 3, 2011, 5:04pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188 "2011-06-03T17:04:13Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [June 3, 2011, 5:04pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/1 "2011-06-03T17:04:13Z")
Im had to put a new water pump in my 95 jeep with 4.0 What am i going to gain by bypassing the air conditioner other than gas mileage. How much mileage might a guy gain? Is it as simple as getting the right belt and just not including the air or is there something else i have to do? Thanks for any info… ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [June 3, 2011, 5:13pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/2 "2011-06-03T17:13:51Z")
Are you planning on eliminating a properly working A/C or working around an inoperative one? If the former, you will gain very little in mileage and none in the latter. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [June 3, 2011, 5:24pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/3 "2011-06-03T17:24:08Z")
also i replaced thermostat…is there anything else i should do while i have it apart?? ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [June 3, 2011, 5:25pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/4 "2011-06-03T17:25:22Z")
The air works. I just thought if there were enough gains i would bypass it. Sounds like it stays. Thanks ---
**Author:** ![lion9car](https://avatars.discourse-cdn.com/v4/letter/l/59ef9b/32.png) [@lion9car](https://community.cartalk.com/u/lion9car)\ **Post date:** [June 3, 2011, 7:29pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/5 "2011-06-03T19:29:15Z")
Will you also keep the windows shut? If not, you’ll be giving up your gains and possibly more. My comfort is worth a small amount of extra gas, but it’s your call. ---
**Author:** ![chaissos](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/chaissos/32/2347_2.png) [@chaissos](https://community.cartalk.com/u/chaissos)\ **Post date:** [June 3, 2011, 7:41pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/6 "2011-06-03T19:41:53Z")
It’s more than just comfort, too. A/C also reduces the humidity on those cold days, helping to clear your windshield, improving your visibility, making you a safer driver. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [June 3, 2011, 7:58pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/7 "2011-06-03T19:58:48Z")
The Air Stays! Thanks ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [June 3, 2011, 9:43pm UTC](https://community.cartalk.com/t/bypassing-air-conditioner-pro-m-cons/65188/8 "2011-06-03T21:43:15Z")
I’d stick with the working A/C. It will drop your mileage a little bit but not enough to even worry about. Back in the old days (say 40 years ago) a compressor would sap a couple or three MPG even on the older large displacement engines because the compressors were huge, heavy, and required a lot of horsepower to operate. Newer compressors don’t chew up near as much power and if you were to modify and install an old GM A6 compressor on a modern 4 cylinder car it would probably bog it down horribly once the A/C was switched on. That’s one reason why back in the 70s GM switched to the R4 compressor. Engines and power output dropped off a lot and the R4 was much smaller, lighter, and did not eat up near as much horsepower as the Godzilla compressors it replaced.