04-08-2017, 06:49 PM | #21 |
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Join Date: Jul 2010
Location: Melbourne Fl
Posts: 166
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Re: 39 Head torque
Valve relief ! Great idea! I am sure there is a lot of meat in the heads for a little relief. I sure would like to salvage this project without breaking the bank. All this help is very much appreciated!
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04-08-2017, 08:40 PM | #22 | |
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Re: 39 Head torque
Quote:
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04-09-2017, 09:55 AM | #23 |
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Join Date: Jul 2010
Location: Melbourne Fl
Posts: 166
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Re: 39 Head torque
I don't know how I missed the clearance problem.. Maybe a senior moment.. But you were right! I added a little more space in the valve pockets and problem solved. Now to get another head gasket. That is the good news. The bad news is I broke the temp gauge bulb..
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04-09-2017, 10:42 AM | #24 |
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Location: Chester Vt
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Re: 39 Head torque
Unfortunately, these heads are not very thick. However when clearencing for valve relief. You should do this at a 5 degree angle, that way you don't have to take off much material. I realize saving money is important, but you have to know the pit falls of doing it wrong. Might cost you more than you planned. An easy way to check all this is to lay the head on the block located by a few bolts, with out a gasket. Spinn the motor, if nothing hit's your golden. But actually measuring the volume and clearances can actually make things work better. Plus you'll know what the CR is.
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04-10-2017, 06:24 AM | #25 |
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Join Date: Jul 2010
Location: Melbourne Fl
Posts: 166
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Re: 39 Head torque
Thanks for our sage advise Ron. Valve shrouding is certainly an issue with these old heads once they have been cut so much. I could have CC'd the head if I still had my setup that I gave away a few years ago when I stopped oval track racing, At this point I just want this thing to run, not overheat and leave my shop!
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