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Old 09-28-2019, 04:15 AM   #1
benno81
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Default Rod bolts

Have sbc lunati pro mod 6.0 rods with the 8740 bolts they come with (arp crb155)
I dont know the history of the bolts so need to check if i can use again
If i put my strectch gauge on one and zero it out should all the bolts measure 0 then if they have not been strectched too far or does it not matter ?
Thanks
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Old 09-28-2019, 04:28 AM   #2
LarryO
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Default Re: Rod bolts

They wont all measure the same with a stretch gauge.

You need to check the length with a micrometer when new and record the measurement to check if they stretch in the future.


Id personally replace them if I didn't know the history of them for peace of mind.
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Old 09-28-2019, 10:39 AM   #3
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Quote:
Originally Posted by LarryO View Post
They wont all measure the same with a stretch gauge.

You need to check the length with a micrometer when new and record the measurement to check if they stretch in the future.


Id personally replace them if I didn't know the history of them for peace of mind.
This ^^^^^^
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Old 09-28-2019, 03:58 PM   #4
MN Hemi
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Default Re: Rod bolts

Pitch them. Molnar offers a great replacement bolt made by ARP. Itís the 2000 material and the threads are much better, among other things.

If you want to replace with the OEM lunati bolts, I have a set here I took out of a brand new set of rods that I replaced with Molnar. $40 and theyíre yours.
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Last edited by MN Hemi; 09-28-2019 at 03:59 PM.
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Old 09-28-2019, 07:07 PM   #5
benno81
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The arp 2000 bolts are $22 each here in australia
Are u able to send the ones u have for $40 to oz?
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Old 09-28-2019, 08:06 PM   #6
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Default Re: Rod bolts

It would probably cost you around $120AU with shipping.

Still a good deal if he is willing to ship here.
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Old 09-29-2019, 01:52 AM   #7
MN Hemi
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Default Re: Rod bolts

Quote:
Originally Posted by benno81 View Post
The arp 2000 bolts are $22 each here in australia
Are u able to send the ones u have for $40 to oz?
I donít see why not. I send lifter bushings and other parts down there now and then.

Give me the underhead length on your bolts to make sure I have the same ones.
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Old 09-29-2019, 02:33 AM   #8
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1.400
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Old 09-29-2019, 05:43 AM   #9
MN Hemi
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Default Re: Rod bolts

Just checked. These are 1.4” as well.

I removed these from a brand new set of forged Lunati Pro mod BBC rods for one of my own builds. I replaced them with Molnar because I was going to run nitrous.

They appear to be a polished bolt. Some have some staining from the assembly lube or manufacture. I handled them with latex gloves as I do all fasteners.

The number on the end is Lunati 0133. They may be able to tell you more.

PM me a postal code and I’ll see what USPS has for options. Last time I sent a box of 12 bottles of assembly lube and some lifter bushings it was like $64. This package will be as small as a book, or padded envelope.
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