In a four-stroke/cycle diesel engine, badly worn intake valve guides can cause excessive（）.<br>A:exhaust pressure<br>B:exhaust temperatures<br>C:cooling water temperatures<br>D:lube oil consumption

In a four-stroke/cycle diesel engine, badly worn intake valve guides can cause excessive（）.
A:exhaust pressure
B:exhaust temperatures
C:cooling water temperatures
D:lube oil consumption

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