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Old 02-13-2003, 06:44 AM
 
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Question camel hump...general top end questions.

I just removed the springs and valves from my camel hump heads...am I right in calling those rubber sleeves valve stems? They look a little abused, how should I go about replacing them...or should I. The ones that were worse off had these little rubber sleeves over top of them. They have double springs and "pushrod guides" or whatever they're called? I'm going to port them to the best of my ability. How do you test the spring pressure for proper cam selection? <img src="graemlins/spank.gif" border="0" alt="[spank]" />

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Old 02-13-2003, 07:05 AM
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The parts you speak of are valve stem seals. They prevent the transfer of oil into the valve chamber through the guide clearances. When the seals and/or the guides are worn, the engine smokes on start=up due to leakage of oil into the combustion chamber while sitting.
Before you jump off into "porting" your heads yourself I would recommend spending some cash on some books explaining basic engine function and basic "hotrodding" techniques.
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Old 02-13-2003, 01:34 PM
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could also leave a big glob of poop on the end of your spark plugs
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Old 02-13-2003, 03:30 PM
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If you have to run the double humps heres what id do...1. Dont p!ss with the factory rubber seals, buy the tool and machine your guides for perfect circle seals. Youll never blow oil if you do it right. 2. Port match the intake runners. 3. Port match the exaust runners. 3. Do some bowl work , smooth out all the extra matirial around the valve guide area. 4. Blend the bowls. And that should be sufficient. If those are factory valve springs, ditch em, theyre probably junk. Get some good springs that match your cam, good retainers {preferably titanium} and locks and while your at it competition products has s/s 1 piece valves for like 75 or 80 bucks for all 16 id do it cause your valves are obviously stockers, oh yeah and get a good valve job done.
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Old 02-13-2003, 07:16 PM
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If someone went through the trouble to install guide plates and studs, I would bet valves and springs were upgraded and should be fine.

Chris
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Old 02-13-2003, 07:39 PM
 
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IT WOULD BE BEST TO TAKE THE HEADS TO A MACHINE SHOP OR TO A ENGINE HEAD SHOP THEY CAN CHECK VALVE SPRINGS ,REPLACE SEALS ETC.
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Old 02-14-2003, 08:37 AM
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When you buy your new cam, get the whole kit with the spring, lifters and cam. Now you have the RIGHT springs and new lifters to go with a new cam. I would do my own heads but I don't suggest you try it without somebody LOOKING over your shoulder. Pay for the work or get withs some guy who do ALL their own work and Learn from them. Even with a BOOK you will be lost. The tools will cost a lot if you don't plan to do heads more than once and it takes skill to do heads right.


Todd
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