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The video mentions that this was done because the people in the driver cabin became covered in diesel soot as the sealing between engine and cabin was not 100%.

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You don't typically see soot dispersed from under the hood of diesel trucks, that would mean leaky exhaust (a big no-no even with external engines). Sure they had their reasons.

A lot of diesel engines have a certain amount of blow-by, which is exhaust pressurizing the crankcase by bypassing e.g. the piston rings. This can leak out from valve rocker covers, etc.

Yeah like the other comment said, they leak.

Especially when it's a tank diesel, not designed for longevity at all.

You have to keep in mind that those were just campers thrown on top of a T-55 tank chassis.

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