Engine Repair (A1)Câu 15 / 120
Coolant is leaking internally and the engine oil appears milky. The MOST likely cause is:
a.A worn timing belt
b.A clogged air filter
c.A failed head gasket or cracked block/head
d.A stuck thermostat
Giải thích
A milky, tan appearance in the oil indicates coolant contamination, commonly from a head gasket failure or a crack that connects a coolant passage to the oil. Continued operation damages bearings. Pressure and combustion-gas testing help pinpoint the leak path.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Blue smoke from the exhaust under acceleration most often indicates:
- Technician A says timing-chain stretch can retard valve timing and set a camshaft/crankshaft correlation code. Technician B says a stretched timing chain has no effect on engine performance. Who is correct?
- Head bolts that use a torque-to-yield (TTY) design should be:
- The main function of engine oil, besides lubrication, includes all of the following EXCEPT:
- A rhythmic knocking noise that is loudest under load and disappears when one cylinder is disabled most likely indicates:
- Before final assembly, plastigage is used to measure:
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