4G63 Head Inspection
This head was damaged by a dropped valve.
Due to the cost of the port work involved in this head, it was deemed feasible to save the head and fix it.
The head is loaded with Super-Tech valve train, Valves, Duel Valve springs and Ti retainers
Some of the retainers suffered some damage where the roller followers hit.
7 Intake retainers and 1 Exhaust retainer were hit.
Also several of the intake valve tips show damage. 4 of them were mushroomed so bad they would not slide thru the guide.
I had to file the lip off so I could remove them.
No shims were found under the spring seats.
The guides are cast iron and were ground on a angle, making the guide shorter and not supporting the valve stem fully.
Valve tip height was found to be with in specs for the most part
Intake 1.914 – 1.926
Exhaust 1.908 – 1.924
There is also damage to the spark plug hole, an insert will have to be installed.
It did have vition blue seals installed.
The rebuild will be fairly straight forward.
The guides will be removed and replaced with bronze guides
The 4 seats in #4 cylinder will be removed and replaced with high nickel alloy seats.
Some welding will be done to fill in deep pits and gouges, and dressed out.
A full multi angle valve job will be done.
A new set of Stainless Steel valves will be used.