Join Date: Feb 2011
Location: San Francisco Bay area
Thanked 70 Times in 70 Posts
Rep Power: 6
Re: Diesel engine compartment ventilation
"there's no air in the exhaust"
Air is 80% Nitrogen and 20% oxygen. Exhaust is 80% Nitrogen and most of the rest is C02. It entirely depends on semantics, but you could say that exhaust is at least 80% air.
Bristol 31.1, San Francisco Bay