Thread: valve guides

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if the guides are moving then they may have locked up on valves .you will have to go over size if at 502 guide now .i would drill &ream up to a over size guilde and use a manganes bronze guilde that cut for a top for 530.PC seal with a shoulder and 545 O.d for a 11/32 valves they cost more not to hard to find PEP. Ferrea. PBM.CV .SBI. all sell them. there not cheap looking at 160. for 16. just did a set of pro comp heads on a boat by the time i did the guide work and honed them to fit the valves with the sunnen P-190 and check sizing with sunnenP-310 new ex valves. new heads may been another way to go if they needed any seat work i think would of been cheaper to throw them out or sell for scrap. you can use a cross over or make a new guide from guide stock they will sell you a false valve guide out of iron or manganese. AV&VS will sell you one but look in the cross over threw like SBI book and find a guide that will not need much work