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2G Reusing Main bearing cap bolts?

Xaveion

Probationary Member
11
0
May 8, 2020
Poteau, Oklahoma
I have a 98 GST 7 bolt engine I’m rebuilding and I was wondering if I can reuse my crank main bearing cap bolts, I’ve heard different things about reusing them and just wanted to get my own answers. Thanks
 

Mech Addict

Supporting Member
1,028
449
Jun 9, 2019
Jackson, Wyoming
The factory service manual doesn’t note these as “never re-use”, as it would for, say, o-rings or cotter pins. I would re-use them if it were the first rebuild on a stock motor that will remain stock in terms of power level, and if there were no serious issues with the old main bearings. If it was the second rebuild, or power was or will be increased much above factory, then I would not risk it. Plenty of folks go with ARP bolts or studs for high-power builds as standard.
 

DSMPT

DSM Wiseman
2,120
1,682
Jun 12, 2014
Japan / Mexico, Arizona
Check the under head length. The original length of 7 bolt main bolt is 70.0mm, the limit is 71.1mm. Do not reuse if it is exceeded the limit or if it is close to the limit.. You can reuse it if the UHL is within the limit, but anyways it's cheap, so replacing would be also a good idea even if it's still within the limit or if you are unsure.
https://www.extremepsi.com/store/OEM-Main-Bolts-Mitsubishi-Eclipe-92-99-7-Bolt.html
 

iugrad92turbo

Supporting Member
12,906
826
May 22, 2007
Kalamazoo, Michigan
Oh cap bolts, this time around im on arps, i misread the question he posted, this i my first built engine but i have reused 6 bolts, though.
 
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