Check each valve spring for squareness

Tap the valve stem seals (arrowed) into place with a deep socket and hammer

 

 

any of the springs are distorted or sagged, renew all of them.

 

19 Check the spring seats and collets for obvious wear and cracks. Any questionable parts should be renewed, as extensive damage will occur if they fail during engine operation.

 

20 Any damaged or excessively worn parts must be renewed.

 

21 If the inspection process indicates that the valve components are in generally poor condition and worn beyond the limits specified, which is usually the case in an engine that's being overhauled, reassemble the valves in the cylinder head and refer to Section 9 for valve servicing recommendations.

 

9 Valves-servicing

 

1 Because of the complex nature of the job and the special tools and equipment needed, servicing of the valves, the valve seats and the valve guides, commonly known as a valve job, should be done by a professional.

 

2 The home mechanic can remove and disassemble the head, do the initial cleaning and inspection, then reassemble and deliver them to an automotive engine overhaul specialist for the actual service work. Doing the inspection will enable you to see what condition the head and valve train components are in and will ensure that you know what work and new parts are required when dealing with the overhaul specialist.