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A little history, I did not build the heads. I had a machine shop build the heads using the specs of the engine and cam. That was done about 15 years ago. Now, I found some broken dampeners and valve stem seals. What size do you recommend or part number for new springs? This has a comp cam N+L79H. The lifters looked fine and same goes with the push rods. The valve springs did not break so no valves were dropped. Is it worth it to install beehive style valve springs? I know I will need to check the height and spring pressure. I can do that work myself. What part number do you suggest to go with? This is a 327 with 461x heads. The heads were machined back in the 60s to accommodate 1.60/2.02 valves. Also were ported same goes for the exhaust side too. I did not do any of that work. A friend of mine gave me the heads to put on my 62 corvette. The exhaust manifolds were done too by a person who raced on circle track. It matched fairly well. The double humps were shaved off to make it look like cast iron. I know these heads are not worth that much. I would like to use the heads because of sentimental reasons. Also what type of valve seals would you go with too?
I use Sealed Power valve springs with success, but dont have the part number handy, can post tomorrow if needed.
I use FelPro SS5112 o-rings and SS10058 valve seals.
I use Sealed Power valve springs with success, but dont have the part number handy, can post tomorrow if needed.
I use FelPro SS5112 o-rings and SS10058 valve seals.
Thanks. I used the same parts for my son's 74 corvette. I do not remember installing the o-rings. He might have done that...
Make sure the spring seats haven't been opened up for larger diameter springs. That could affect your decision. Also, what seals do they have on them now?
Make sure the spring seats haven't been opened up for larger diameter springs. That could affect your decision. Also, what seals do they have on them now?
The ones now were metal shrouded ones with blue urethane bushings. If that makes sense. No, the spring seats are the same size as the shims and lower seat. I just ordered a set of valve springs (non beehive).
The ones now were metal shrouded ones with blue urethane bushings. If that makes sense. No, the spring seats are the same size as the shims and lower seat. I just ordered a set of valve springs (non beehive).
I think my son figured out what happened... There was not enough spring pressure plus the locators were moving around the valve guides. The guides are almost rounded off so that meant the valve springs were moving around in the seats. The shop that did the work should have used a bigger shim/s. Right now, all of the shims were .010. So it looks like I am going to take the heads into the machine shop on Friday once I get the other valves torn down. Dont mind the welded valve cover holes. Those were done by my friend back in the early 70s. Him and his brother did not know there were two different types of corvette scripted valve covers. Plus someone removed the double humps for the stealth look. These heads are more sentimental to me since it was gifted to me during the restoration.
Last edited by jimh_1962; Aug 2, 2023 at 12:11 PM.
An update. I bought another set of 461 heads with 1.94 valves. I got the set for $150.00. One of the heads has the valves installed. The other valve parts are in a box. The valves have been numbered. My plan is to take apart the one head and get both heads checked. Then have a valve job done. I will probably leave the heads with the same size valves for now. Down the road, I plan on replacing the heads with a set of aluminum heads.
I am going to pull the engine to check the bearings. Plus, I want replace the oil pickup and flush out the oil pump.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
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valve spring coil bind broken dampeners
