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By center27 - 9 Years Ago
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I have a '59 292 Y-block (B9AE code) and I am installing the heads. I stuck a coat hanger in each head bolt hole and verified they do have a bottom and don't appear to enter the water jacket. I installed the bolts and torqued them. Then I ran across a manual that says to install water resistant thread sealant on the threads? Did I miss something?
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By charliemccraney - 9 Years Ago
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The manual is incorrect. No sealer is required with a Y.
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By center27 - 9 Years Ago
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Thank you Charlie for responding. I was anticipating purchasing new head gaskets and starting over.
While searching thru older posts looking for an answer to the sealer question, I ran across several regarding the need to replace the head bolts with new because the old bolts have probably stretched. My engine was running perfectly before I tore it down only in a effort to seal a few leaks and to repaint everything before returning it to my restomod '56 F100. Are stretched bolts a common problem, and should I just replace them while I have the motor out? If I were to replace them, can I replace one at a time without replacing the head gasket again, or will that cause additional issues?
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By Ted - 9 Years Ago
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The grade six head bolts are notorious for stretching as they age. I’ve never had an issue with the factory installed grade eight bolts so I’ll reuse those but any of the older grade six bolts I’ll replace with new grade eight bolts. The grade six bolts can be recognized as having four hash marks on their tops while the grade eight bolts have six hash marks.
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By 57RancheroJim - 9 Years Ago
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Where are the grade eight bolts available ? I've only found stud kits..
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By Ted - 9 Years Ago
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57RancheroJim (3/14/2016)
Where are the grade eight bolts available ? I've only found stud kits.
John Mummert sells a grade 8 head bolt kit which are ARP bolts. An alternative is to simply go to any bolt manufacturer and get the appropriate ½-13 grade eight bolts in the appropriate lengths. I have used the local Fastenal in the past to provide the necessary grade eight bolts but I use the ARP heads bolts most of the time.
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By 57RancheroJim - 9 Years Ago
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Ted (3/14/2016)
57RancheroJim (3/14/2016)
Where are the grade eight bolts available ? I've only found stud kits. John Mummert sells a grade 8 head bolt kit which are ARP bolts. An alternative is to simply go to any bolt manufacturer and get the appropriate ½-13 grade eight bolts in the appropriate lengths. I have used the local Fastenal in the past to provide the necessary grade eight bolts but I use the ARP heads bolts most of the time. Thank you Ted, my old eyes must be failing as I looked at Johns site and missed them. I've seen some recent posts of people having problems with Fastenal bolts being made off shore, don't know how true that is..
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By 2721955meteor - 9 Years Ago
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if ther is a cat dealer near by they have them. thats wher i purchased myn,also got hardened washers from them.
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By Ted - 9 Years Ago
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When purchasing bolts from Fastenal, I just make sure that they are made on this side of the world. I’ve no problem with bolts made in Canada.
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By CK - 9 Years Ago
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Maybe the sealer is to lubricate the threads in place of oil or grease. ???
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By Dobie - 9 Years Ago
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It may be verbiage left over from the flathead manuals that the proof readers missed since most of the head bolt holes go into water on those. Those kind of mistakes in manuals can go on for years before somebody notices and removes them.
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By 57RancheroJim - 9 Years Ago
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The shop manuals have errors or things that need to be modified so I never take them as 100% Gospel. The problem is the modifications and changes only go to dealers in the form of Service Bulletins.
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By LordMrFord - 9 Years Ago
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You can go over those manual's torque specs if you have ARP-bolts because standard bolts are weaker than block's threads.
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