The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-18-2004, 05:59 PM   #1
72'BBGMCSGCC
Registered User
 
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
Question 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
72'BBGMCSGCC is offline   Reply With Quote
Old 04-18-2004, 06:32 PM   #2
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,630
If everything is to spec, I personally would not bore the block. No sense in boring if you do not have to.
kwmech is offline   Reply With Quote
Old 04-18-2004, 06:35 PM   #3
jhwkns
Registered Cruiser
 
jhwkns's Avatar
 
Join Date: May 2002
Location: Las Vegas NV
Posts: 2,230
66k is just broke in... There should be plenty of life left there...
__________________
I intend to live forever. So far, so good.
jhwkns is offline   Reply With Quote
Old 04-18-2004, 08:47 PM   #4
PanelDeland
I am a Referee of life.
 
PanelDeland's Avatar
 
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,992
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"
PanelDeland is offline   Reply With Quote
Old 04-18-2004, 08:54 PM   #5
guitarornothin
RUNN over AGAIN!!!
 
guitarornothin's Avatar
 
Join Date: Jun 2003
Location: Big Spring, Texas
Posts: 505
i wouldnt if you dont have to.
__________________
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
,/.
guitarornothin is offline   Reply With Quote
Old 04-18-2004, 09:04 PM   #6
Jeepster376
Registered User
 
Jeepster376's Avatar
 
Join Date: Feb 2004
Location: Massachusetts
Posts: 269
Not with only 66k, if the cylinders measure OK, just hone and ring it. Bore it next time.
__________________
72 Cheyenne Super 4x4 SWB
Jeepster376 is offline   Reply With Quote
Old 04-19-2004, 09:20 AM   #7
72'BBGMCSGCC
Registered User
 
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
Smile

Thanks everyone. I appreciate it.
72'BBGMCSGCC is offline   Reply With Quote
Old 04-19-2004, 09:21 AM   #8
72'BBGMCSGCC
Registered User
 
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
Question

I forgot to ask, Should I buy new pistons and rings or just rings and use the origional pistons? Thank you
72'BBGMCSGCC is offline   Reply With Quote
Old 04-19-2004, 10:40 AM   #9
sneakysnake
It's a catastrophic success.
 
sneakysnake's Avatar
 
Join Date: Jan 2003
Location: Oklahoma
Posts: 2,077
just for ???? if all was good, what made you tear it down in the first place?
sneakysnake is offline   Reply With Quote
Old 04-19-2004, 04:31 PM   #10
72'BBGMCSGCC
Registered User
 
Join Date: Nov 2001
Location: Fletcher,N.C U.S.A
Posts: 162
Smile

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?
72'BBGMCSGCC is offline   Reply With Quote
Old 04-19-2004, 05:38 PM   #11
smitty62
Registered User
 
smitty62's Avatar
 
Join Date: May 2002
Location: North Carolina
Posts: 1,234
Old pistons--new rings. Make SURE you have the cylinders honed! Sounds like you lucked out.
__________________


Stepsides look like real trucks!
Smitty

smitty62 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:32 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com