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V8 head bolt question |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Posted: Jul/09/2009 at 7:30pm |
The head of the local MOPAR club directed a fellow to me today - this fellow has a 77 Hornet that someone put a 290 in.
As he was putting the heads back on it, he broke a head bolt. Ouch, he got the piece out.
He's tried to find new bolts locally and the local Jeep place literally laughed at him and said they were sorry he had an AMC and could not help him. (Stew Hansons, don't ever go there anyway)
I was wondering - is there a chance that Jeep dealers may still have head bolts for the AMC V8, and if so, can I get a number?
Otherwise, if I could get him a few good used bolts to get him back on the road (I can tell he's a Rambler person, trying to get it running cheap and by himself)
I did help him a lot by explaining that you don't adjust the valves like a chevy - my first clue that he may have been trying that was he commented about the valves being loose and he tried to adjust a couple and said "they have the rockers like the chevrolets did".
I said it may look that way, but.........
I also suspect his issue is a bad cam, but that's another thing.
Any ideas on him getting head bolts locally?
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poormansMACHINE
AMC Addicted Charter Member Joined: Jun/28/2007 Location: Shoemaker-Levy9 Status: Offline Points: 12302 |
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You're talking 7/16 head bolts, not the later 1/2".
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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I thought the 290 might be different, couldn't recall.......... been a while since I worked on my brothers 69.
He thought it was a 304, I said it was really easy to tell - crawl under it.. etc. He then said, oh, then for sure it's a 290. (he already looked under the car) |
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bigbad69
Supporter of TheAMCForum Joined: Jul/02/2007 Location: Ottawa, Ont. Status: Online Points: 6605 |
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290 would be 7/16" bolts.
I broke a bolt putting my engine back together too. Ended up buying a set of ARP bolts. No worries about breaking them! |
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69 Javelin SST BBO 390 T10
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TorqueyAMX
AMC Addicted Joined: Dec/16/2008 Location: Simi Valley CA Status: Offline Points: 1139 |
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The simplest solution would be ordering ARP Bolts from ARP, Summit Racing or whatever.
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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That's what I suggested, he was familiar with JEGS, SUMMIT, etc - but I suspect money is a real issue, a fellow a bit older than myself, and the location he said he lived indicated not a high-income area.
I said I'd try to help - so that's what I'll do! I wish I had some spares here, I'd run them over to him............. |
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d7javelin
AMC Nut Joined: Jul/29/2007 Location: Minnesota Status: Offline Points: 465 |
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Dorman makes head bolts. I bought a set of 1/2 inch bolts in case I ever needed them. The catalog had no listing for AMC but, the buyers guide listed the bolts by sizes. As it turns out, the AMC head bolts and Olds head bolts were the same.
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r08ert209cali
AMC Apprentice Joined: Jun/13/2009 Location: Nor Cal Status: Offline Points: 8 |
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pm me I can send you some used bolts off my 304
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19610 |
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A grade 8 bolt from the local fastener supply should be fine, same length and all.
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Frank Swygert
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BassBoat
AMC Addicted Joined: Aug/29/2008 Status: Offline Points: 1713 |
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The torque specs for a grade 8 bolt are less than the stock head bolts, so my interpretation is that the stock head bolts are stronger than grade 8. Oh, and I researched this after losing a bolt, substituting a mopar head bolt, and breaking it off in a freshly assembled engine. The stock mopars and chevy bolts are about the same torque spec as grade 8, not so with AMC. I used an aftermarket bolt for a small block chevy that was supposed to take "20 ft lbs more than stock" torque, about what the AMC bolts require. Best bet is to find somebody that has a 290-343-390 head bolt.
BB
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