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Original Message
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RE: Greg, newer heads do have different drain holes |
By Greg Westphall - 10/16/2003 2:15:18 PM; IP 12.158.13.35 |
I knew about the valve guides. They replaced mine when they put in new seals because of this. Keep in mind they only did this for free for me because the heads arrived in such bad condition (shot blast still in the casting). I ruined the teflon seals taking the heads apart to clean them. Instead of giving me new teflon seals they upgraded me to the new ones which required the new guides. I asked them if I could enlarge the holes and their answer was yes. When I asked for more detail like how much or in what direction I received no further reply. Rather than risk hitting a water jacket or weakening the head bolt area I left them alone. I would definitely recommend you put in new seals if they are the least bit suspect. Even with the small holes my heads seem to be draining back sufficiently. I would be cautious on how much you restrict the oil to the top end. I know everyone recommend doing it especially with roller tipped rockers but the oil does more than lubricate. It conducts the heat being generated at the guide and spring. |
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