Answer / jai

back compressure occer due to worn out of piston ring and
liner

Answer / naveen rohilla

Back com pressure mean that cylinder compresses air come in
to throttle body via intake manifold. their many reason of
back compression like worn out cylinder bore, piston ring,
wrong valve timing etc. In carburetor car have more back com
pressure than MPFI Engine.

Answer / brundaban chandra das

back compressor means when compressor leaks to crankcase.that happens when there is a leakage in compression system which may be due to excess ring gape(less tension of ring),ring worn out,piston groove clearance is more.it also depends upon the sp.gravity of e.oil.

basic difference between bsIII & bs IV

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