Question

Which type of valve guide is most often used in a cast-iron head? A. Bronze B. Thin wall sleeve C. Powdered metal D. Integral

Answer 1

D integral

Step-by-step explanation:

took pf test

Answer 2

The answer is letter D. From the choices above, the integral cast-iron is used to help to conduct heat from the combustion process out from the exhaust valve and into the cylinder head where it may be taken up by the cooling system.