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04-18-2004, 05:59 PM
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#1 |
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Registered User
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
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bore or not to bore?
My 402BB has 66,000 origional miles and I had the block and all of the clearences checked and the machinist said I can use all standard bearings and rings,etc. and there was hardly any wear on the engine. The bearings were in unbelievable condition. I've talked with a couple of other mechanics and they said it should have been bored out just to make sure everything was done right. Do I need to have it bored or not? Thank you everyone
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04-18-2004, 06:32 PM
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#2 |
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,630
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If everything is to spec, I personally would not bore the block. No sense in boring if you do not have to.
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04-18-2004, 06:35 PM
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#3 |
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Registered Cruiser
Join Date: May 2002
Location: Las Vegas NV
Posts: 2,230
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66k is just broke in... There should be plenty of life left there...
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I intend to live forever. So far, so good. |
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04-18-2004, 08:47 PM
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#4 |
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I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,992
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A quick hone job for the crosshatch pattern and go.If you bore it it will need pistons and rings in the new size.Also you will lose one more rebuild the block would be capable of.
__________________
The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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04-18-2004, 08:54 PM
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#5 |
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RUNN over AGAIN!!!
Join Date: Jun 2003
Location: Big Spring, Texas
Posts: 505
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i wouldnt if you dont have to.
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67-72 TRUCKS ROCK 70 SWB shaved and a 72 front clip.and a poly tank. Peep mirrors and a BIG BLOCK 468 in the making. XNXNXNXNXNXNXNXNXNXNX ,/. EMAIL ME HERE!, Dont pm me please ,/. |
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04-18-2004, 09:04 PM
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#6 |
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Registered User
Join Date: Feb 2004
Location: Massachusetts
Posts: 269
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Not with only 66k, if the cylinders measure OK, just hone and ring it. Bore it next time.
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72 Cheyenne Super 4x4 SWB |
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04-19-2004, 09:20 AM
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#7 |
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Registered User
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
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Thanks everyone. I appreciate it.
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04-19-2004, 09:21 AM
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#8 |
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Registered User
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
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I forgot to ask, Should I buy new pistons and rings or just rings and use the origional pistons? Thank you
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04-19-2004, 10:40 AM
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#9 |
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It's a catastrophic success.
Join Date: Jan 2003
Location: Oklahoma
Posts: 2,077
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just for ???? if all was good, what made you tear it down in the first place?
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04-19-2004, 04:31 PM
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#10 |
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Registered User
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
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The truck is having a ground up restoration done and it had a leaking rear main and found out it had 1 bad intake valve , but that was all. What about changing the pistons?
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04-19-2004, 05:38 PM
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#11 |
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Registered User
Join Date: May 2002
Location: North Carolina
Posts: 1,234
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Old pistons--new rings. Make SURE you have the cylinders honed! Sounds like you lucked out.
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Stepsides look like real trucks! Smitty 
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