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No but, if you are going to the trouble to take the head off, then have all the valves checked, replaced if needed,or cleaned and re-seated. The valve seat in the head should be checked and serviced also. If the exhaust valve is bad, you really do not have to replace the intake, just have it serviced. Might just have carbon on the valve and cleaning will do the job. Just make sure that whomever does the job, that the seat on the valve and head are done properly. When the valve is ground properly, there is a small ring line around the valve head , measures no more than 1/8 of an inch. If too wide, or no seat at all, the engine will not run properly, and the valve will burn. Have the valve seals replaced at the same time.
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