Hi

I am going to change the valvesprings on my two HP500
they have about 260 hrs, Is it important to change the retainers and valve locks to ? I am going to use comp cams 929.

Erik

Sweden

When the shop did mine they replaced every thing. I would do asap u dont want to push your luck over 200 hours Those are great motors and thats the only week link. I love mine

Good luck

Make sure you get retainers compatible with the roller rockers. I got a set recently that did not have enough of a pocket so the arm hit the retainer before the roller hit the valve stem.