Drew89

I checked for codes, there are none. I followed a youtube video for bleeding air from coolant system (Fordtechmakuloo I think its called). This morning it seems to be fine, lots of opening/closing sounds now from behind dash, but I believe your theory is right, it has something to do with the a/c compressor always coming on/off. I am afraid to even change the heat vent setting as I dont want to cause it to start again, I will check the fuse next chance I get.

So I have a 14 Edge SEL 3.5 FWD, my issue is that when idling with the heat ON, no matter if the engine is warm or cold, every 32-42 seconds, the engine will sort of jump making a sort of clunk noise causing the revs to slightly increase and come back down. It could do it as I'm driving as well, but theres really no way for me to tell. The sound is as if you have worn motor mounts and you accelerated quickly from a red light, you get that unpleasant pop/bang. Every time that happens, it's followed by a liquid sloshing/gurgling sound that comes from behind the screen on the dash, which usually lasts 2 seconds. If I turn off the power to the heat controls, the liquid noise and engine bang goes away. I have no clue if it happens when the A/C is on as its winter here in Canada and I haven't tried it yet. I don't believe it's the a/c sloshing/drain issue as this is with heat on, and the engine makes the bang/revs raise which I haven't heard of anyone else experiencing. I did a coolant drain and fill (3 times) back in July. My only guess can be air somehow in the system, but would that be enough of a factor to cause the engine to make that noise/ behave that way? My coolant level has been consistently in the same correct level since the drain and fill. Any help is greatly appreciated.

I wish I could, that looks sweet. Maybe this would be better? Goodyear Wrangler Duratrac 265/65/17 with 17" KMC KM708 Bully Wheels (5x114.3 Offset 38mm Bore 72.6mm)

Would this setup work? BFGoodrich All-Terrain T/A KO2 Tires - LT255/55R18/8 and KMC KM708 BULLY Series Wheels - Satin black 5x114.3 18" Offset 38mm Bore 72.6

Before I get slammed, I did do a search for previous posts and there was never a concrete answer. Just a suggestion to check out tirerack.com and use their calculator. But that does not help my situation. The site just tells me my stock size is 245/60/18 and shows me larger rim sizes I can upsize too. I want to find out how I can run a tire like the Goodyear Wrangler Duratec or BF Goodrich KO2. My first option would be to find a size to fit on the stock 18" rims. Is it possible to use a 255/70/18 tire on the stock rim? If not, can you please let me know what aftermarket rim size and tire size I would need to be able to run this setup? Would a 265/65/17 tire work with lets say a KMC 17"rim? Ideally looking to run the biggest off road/all terrain tire possible all year round. Thanks in advance for any help.