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Are the main bearing bolts reusable.

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Old 05-15-2009, 06:44 PM   #1
JC316
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Default Are the main bearing bolts reusable.

The haynes manual says that they aren't reusable. Just checking to see if they are and if not, where do I find new ones?
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Old 05-15-2009, 06:52 PM   #2
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No. They are TTY bolts and can not be reused. Any auto parts store sells them. ARP main studs are only $100.
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Old 05-15-2009, 07:36 PM   #3
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What about the rod bolts? Same story?
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Old 05-16-2009, 01:35 PM   #4
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Anyone know if the rod bearing bolts are reuseable, or where to find them for that matter?
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Old 05-16-2009, 05:18 PM   #5
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Whats a TTY bolt?
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Old 05-16-2009, 05:38 PM   #6
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Whats a TTY bolt?
Torque to yield. Also known as stretch bolts. You torque them to a certain torque, then go so many degrees past that. If you reuse them, then you wind up stretching them more and potentially breaking them.
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Old 05-17-2009, 09:26 PM   #7
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Seeing as I am using a teksid block, the ARP main studs are 200 bucks. Could I maybe get by reusing the stock bolts? Or is there somewhere I can get new OEM teksid main bolts?
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Old 05-17-2009, 10:42 PM   #8
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ARP or go home, why skimp on something like that, build it once and built it right.
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Old 05-18-2009, 02:42 PM   #9
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The shop thats building my motor had said they would look at them reuse them if they didn't look bad/stretched. Its weird that they would suggest reusing them when they should know that they shouldn't be reused. I called today, and left a message with the woman in the office asking if they could use ARP studs instead and she said she thought the motor was almost done. It's not really that hard to change them own I don't think, so if its done I should still have them swap in ARP studs?
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Old 05-18-2009, 04:06 PM   #10
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Originally Posted by jvog View Post
The shop thats building my motor had said they would look at them reuse them if they didn't look bad/stretched. Its weird that they would suggest reusing them when they should know that they shouldn't be reused. I called today, and left a message with the woman in the office asking if they could use ARP studs instead and she said she thought the motor was almost done. It's not really that hard to change them own I don't think, so if its done I should still have them swap in ARP studs?
Absolutely, that is not something to dick with. If you reuse a stretch bolt, then you are running a huge risk of them breaking, especially if you are putting down alot of power. Think of it like this, one broken bolt = bye bye motor. Want to risk that?

I went to the local ford house and ordered the stock botls for $4 each. I would go ARP, but $$$ and time are running short.
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Old 05-18-2009, 04:23 PM   #11
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Absolutely, that is not something to dick with. If you reuse a stretch bolt, then you are running a huge risk of them breaking, especially if you are putting down alot of power. Think of it like this, one broken bolt = bye bye motor. Want to risk that?

I went to the local ford house and ordered the stock botls for $4 each. I would go ARP, but $$$ and time are running short.
Some block use 2 bolt mains and some use 4 right? I'm not even sure how many a teksid block has. I may just get new bolts from Ford, we'll see what the guy says when he calls me back tomorrow.
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Old 05-18-2009, 04:39 PM   #12
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Some block use 2 bolt mains and some use 4 right? I'm not even sure how many a teksid block has. I may just get new bolts from Ford, we'll see what the guy says when he calls me back tomorrow.
I believe that some use a 4 bolt main. My 2V has 2 main bolts, 2 side bolts and 2 jack screws per main cap.
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Old 04-14-2014, 03:36 PM   #13
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Default Ford Racing reusable bolts

The main bearing caps have 6 bolts each and 30 altogether for the engine: two main bolts closer to the centerline (13mm heads) for the bearing, two jack bolts closer to the block walls (10mm heads and 8mm bolts 1.25 journals), and two external (10mm head with cup washer).

The TTY bolts that came from factory are a one-time use type: once they are torqued they permanently elongate into the plastic range (stretch with no return to original length) of the material. If you try to use them again they will most likely snap or will not have the same strength as intended. Any failure in this part will be catastrophic to the engine, so don't take any chances and do not listen to the non-sense from the shop. That being said: I would check their homework after they are done, since they show some lack of knowledge on the characteristics of these engines.

I just ordered the full Ford Racing reusable set of bolts for the aluminum blocks (96-04) from AmericanMuscle.com for $44.99. I would recommend going this route Check them out.
ARP bolts are also an excellent option.

Good luck with your built!

Last edited by supercotufa; 04-14-2014 at 04:01 PM.
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Old 04-14-2014, 03:36 PM
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