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Old 06-27-2011, 07:19 AM
Roy C Roy C is offline
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main bearing cap bolts

My son and I are rebuilding our first '87 4.9L engine. We ended up over-torquing the bolts on the main bearing caps due to misreading the manual. We got off on the wrong line. Anyway, one of them broke. Does anyone know where I can get a complete set? I'd like to replace them all if possible.
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Old 06-27-2011, 12:05 PM
Harte3 Harte3 is offline
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Try an auto parts house or machine shop.
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Old 06-27-2011, 01:20 PM
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Quote:
Originally Posted by Roy C View Post
My son and I are rebuilding our first '87 4.9L engine. We ended up over-torquing the bolts on the main bearing caps due to misreading the manual. We got off on the wrong line. Anyway, one of them broke. Does anyone know where I can get a complete set? I'd like to replace them all if possible.
I've got a set of brand new ARP studs I'll sell for $25.00 + the ride. Brand new, in the box.
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Old 06-27-2011, 02:54 PM
Roy C Roy C is offline
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Everyone,
Thanks for the info. However I just went by the shop that did the head work and the guy has a 4.9L block that he doesn't need anymore so he's going to sell me the bolts out of it.
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Old 06-27-2011, 02:59 PM
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As a precaution I would chase all the bolt holes with a tap, IMO.
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Old 06-28-2011, 03:21 PM
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As a precaution I would chase all the bolt holes with a tap, IMO.
Not a good idea unless you have a GH1 tap. Most commonly available taps are GH3. They will cut the threads oversize, resulting in loose threads which will significantly weaken the threads. If you can run the bolts in by hand without them binding, don't chase the threads.
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Old 06-28-2011, 05:28 PM
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Maybe it's just me, but when I have an old engine, and the main/head, rod bolts have been holding torque for 24 years, I think long and hard about fatique and stretch. There is a company called IIRC ... headbolts dot com? I believe, who have all the bolt for a 300.

Me, I'd rather spend an extra $40-$60 and know it is like the factory intended.

Good luck.

Nope, that site doesn't have them; only head bolt and many others. I know you have gone a different route, but ARP would be your best bet, anyone else searching for replacements.

The site I mentioned above also has the hard-to-find cam thrust plates!!
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