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Replacement Conrod/ main cap bolts

Single peger

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Hello didn’t want to make a whole thread but i cant seem to find any bolts or info about replacement bolts,

in the process of rebuilding a buick 3.8 and just wanted to see if people are replacing the conrod bolts and also the main cap bolts? I know with head bolts, flywheel bolts are generally a one time use once they’re torqued is it the same for these bolts?

Im guessing they can be reused as I can’t seem to find any replacements?
Any help appreciated
 

HarryHoudini

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Hello didn’t want to make a whole thread but i cant seem to find any bolts or info about replacement bolts,

in the process of rebuilding a buick 3.8 and just wanted to see if people are replacing the conrod bolts and also the main cap bolts? I know with head bolts, flywheel bolts are generally a one time use once they’re torqued is it the same for these bolts?

Im guessing they can be reused as I can’t seem to find any replacements?
Any help appreciated

Its best to replace the bolts you mentioned,any Engine Builder should be able to help.
The workshops,like Harrop, in Melb. that built the Buick racing engines in the 1990's would probaly have boxes of them left over.
 

Single peger

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Its best to replace the bolts you mentioned,any Engine Builder should be able to help.
The workshops,like Harrop, in Melb. that built the Buick racing engines in the 1990's would probaly have boxes of them left over.

ah sweet im in nz so were in full lockdown at the moment so just been trying to source things online or find out whos got what for when things open back up, im rebuilding it myself but i might have to ring around them once where out of lockdown and see weather i can get them here or have to order them in from aus
 

Immortality

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MACE might have some bolts to suit. There will be ARP bolts to suit if you are willing to pay.

Flywheel bolts are TTY and should be replaced. I used ARP bolts on mine
Rod bolts are re-usable I believe.
I think the mains are re-usable also.

I think it was ecotec where GM changed a lot of the fasteners to TTY type, use once and throw away after removal.
 

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ah sweet im in nz so were in full lockdown at the moment so just been trying to source things online or find out whos got what for when things open back up, im rebuilding it myself but i might have to ring around them once where out of lockdown and see weather i can get them here or have to order them in from aus
MACE might have some bolts to suit. There will be ARP bolts to suit if you are willing to pay.
Like this:
 

losh1971

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Bloke who replaced all my crank bearings reused the bolts. They are not TTY. Rods are more likely to elongate than have bolt problems.
 
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harrop.senator

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When using arp you need to mic the holes out really well. A lot of them the extra clamp ovals the set up and need the mains align honed or the rods resized.
 

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MACE might have some bolts to suit. There will be ARP bolts to suit if you are willing to pay.

Flywheel bolts are TTY and should be replaced. I used ARP bolts on mine
Rod bolts are re-usable I believe.
I think the mains are re-usable also.

I think it was ecotec where GM changed a lot of the fasteners to TTY type, use once and throw away after removal.

Yeah always replace flywheel bolts i like my legs lol yeah I haven’t herd many people replacing main cap bolts so think ill be ok then and just replace rod and flywheel bolts
 

Immortality

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Rod bolts aren't TTY. Upgrade if you want to rev the motor more.
 
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