You’d fill a tire with pretty low pressure, dirty, mostly co2, I’d assume. It probably wouldn’t be drivable and even if it was the small amount of oil and fuel residue would likely damage the inside of the tire after a while.

There are some cool gadgets that you screw into a spark plug socket in the engine and crank it over with the starter to inflate a tire. You’d want to unplug the fuel injector(s) or you’d be turning the tire into a bomb.

The pressure from an exhaust pipe is <0.17 bar or 2.5 PSI.

My car tires have to be pressurized to 2.3 bar or 330 PSI.

So what happens is you get a flat tire that smells funny. And if you are doing that in a garage, you’ll probably get carbon monoxide poisoning.

There’s going to be a limit to how much pressure before stalling and/or damaging the engine, but it would inflate, and as the gases cooled, it would deflate somewhat.

Exhaust jacks are used in 4x4 recovery, so an engine can lift a car, but they seem pretty limited and dangerous and I’ve only seen one used once in my ~25yrs off road.

The exhaust won’t work, but included with my grandpa’s 1952 8n ford tractor came with an adaptor that you would replace a spark plug on one cylinder, and then pump up a tire using the unburned air fuel mixture into the tire, and running the enigne on the other 3 cylinders.

So the idea is very close to something that was actually done in the real world.

The sherp vehicle does just that.

I’m not so sure you can get enough pressure from the exhaust

You get tired.