Posted by JD B Mech on January 29, 2013 at 11:18:19 from (68.109.250.136):
I"m getting ready to reinstall the head and manifold on my 1938 JD B. The head has been reworked, the manifold planed flat, and all parts/gaskets acquired. I"ve read the I/T manual, but of course, it doesn"t cover every detail. Since this is my first time to do it, I want to get it right because head gaskets are damned expensive.
1. On the manifold studs, how far do you screw them in to the head......until they bottom out? Obviously, the short threaded end goes in the head, but if you screw them in all the way, will they hit the pushrod tubes? 2. What do you put on the ends of the manifold studs to prevent water seepage around the threads? I"ve heard Permatex mentioned, but what kind? 3. Should I put any sealant or anything on the manifold gasket to prevent leakage? 4. Should a flat washer and lock washer go under the nut on top of the stud? How tight should the nut be? I want to get it tight enough to prevent leaks, but don"t want to break off manifold ears. 5. Should any sealant be put or sprayed on the head gasket? 6. I"ve heard of people torquing the head nuts to the proper specs and in the correct sequence, and then loosening all the nuts and doing it again. Is this a good technique? (Seems like you"d defeat the sealing capability of the lead washers.) 7. On the two long bolts which hold the rocker arm assembly, do I need to put any kind of sealant on the threaded end which screws in to the head? How about the other end that the acorn nuts screw on to........will oil leak out of these holes without some sort of sealant or washer?
Yes, it"s a lot of questions. I"m determined to get this right and appreciate your input.
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