From the sound of that motor, I'd say yer big end's gone, mate.
Source: wiktionary
Big end
Synonyms for "big end" (38 found)
Ranked by relevance and common usage.
Sample sentences
3 total sentences available.
Except in the case of the largest 4-6-2, not yet in contemplation, use of two [outside] cylinders only was decided on for the following reasons:— […] 2. The split inside big end is a source of trouble at high speeds and powers unless exceptional integrity of maintenance can be guaranteed.
Source: wiktionary
Oil is carried from the big end to the small end by a centrally drilled oil hole.
Source: wiktionary