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Do You Need To Grind New Heads And Valves

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Do new intake and exhaust valves need to be. 13.07.2009 183 Its a very good idea to grind the valves and the seats - that way you absolutely know youll have the proper angles and a good seal. 0 0 0. Login to reply the answers Post Robert M. Lv 7. 1 decade ago. This seat material is designed to prolong the ability of the valve seat to seal against the pounding of the valve head during engine operation. The variety of materials also means new and different abrasives are required for proper machining. The first step in grinding seats is to know what you are grinding so you can select the proper abrasive. Jun 18, 2014018332For a quotrealquot home valve grind you dont even need stones. Put a couple of small dabs of lapping compound on the valve, insert valve in head, spin valve with stem chucked in drill. Why go half-ass when whole-ass is so much easier. To lap valves, youll need valve grinding compound and a valve lapper, which is basically a wooden dowel with a suction cup on the end. If youre checking the seal on a head thats just come off a car, wire wheel the carbon and gunk off the head and the sealing area and the stem. Make sure there is no dirt in the valve guide or on the valve stem. Aug 10, 2008018332If the valves are new and the seats in the head are not burned or pitted you dont need to grind. Lapping the valve to the seat with lapping compound will do the trick. You want to see a narrow uniform quotlinequot around the valve face and head seat. May 22, 2011018332Do you need to grind new heads and valves Late V8 1954. Dec 12, 2016018332If the engine has not overheated, do I still need to have the heads machined I think this would save me alot of down time and few extra buck if I dont need to do that. I think that for 150 to do valve stem seals and grind and flatten them its worth not having to do it again. If youre using stock heads, theres really not much point in going past about.500 lift with even the best factory heads. One more point to consider high maximum lift doesnt cause issues with valve to piston clearance, but there are a host of other clearance issues it can cause. Ive been to several machine shops in the area, and I can tell you with 100 certainty, there is no grinding anymore in valve seat grinding. Todays machinists are using a mill that tilts all kinds of ways and directions. Now that unleaded is all you can get, valve jobs are needed even more often But regardless of the why, the point is every once in awhile, they have to be done. We have a good article on Do I Need A Valve Job if youre still unsure. If you touch the finished seat, youll need to take the head back to the machine shop to have it touched up.

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