6066 (1960-1966) GMC Truck Club Bitcoin now accepted here! 
Pay Dues
Pay Dues or become a Site Supporter
 



Go Back   6066 (1960-1966) GMC Truck Club > 6066 GMC Truck Club Forum > GMC V6 and V12 Engines


GMC V6 and V12 Engines Engine repair and rebuilding

Reply
 
Thread Tools
  #1  
Old October 2nd, 2022, 11:29 PM
Mike Caldwell Mike Caldwell is offline
Member
 
Join Date: Feb 2013
Location: Glendale, KY
Truck: 401 headed for '49 Willys PU
Posts: 71
Rep Power: 80
Mike Caldwell is on a distinguished road
Default More bad news for my 401

Finally got the driver's side head off. Definitely helps when you take out all the bolts

Do not like what I saw after vacuuming out a handful of dust.

Anybody got a set of oversize 401 pistons for sale????
Attached Images
File Type: jpg 401 number one .jpg (1.92 MB, Multiple views, 8 clicks)
File Type: jpg 401 number one CU.jpg (3.56 MB, Multiple views, 3 clicks)

Last edited by Mike Caldwell; October 3rd, 2022 at 09:26 AM.
Reply With Quote
  #2  
Old October 3rd, 2022, 01:31 PM
George Bongert George Bongert is offline
Senior Member
 
Join Date: Jan 2013
Location: Oshkosh Wisconsin
Truck: Former owner Repowered by GMC 305 V-6, 1963 Chevy 30 Series SM420 Long Bed (9') Step/Fenderside
Posts: 177
Rep Power: 115
George Bongert will become famous soon enoughGeorge Bongert will become famous soon enough
Default Re: More bad news for my 401

Ouch!! That is one thing that I least like to see when removing a cylinder head from an engine!! That is indeed a mechanics nightmare!!
Reply With Quote
  #3  
Old October 9th, 2022, 02:33 AM
beerman beerman is offline
Member
 
Join Date: Feb 2016
Location: Yardville, NJ
Truck: 1968 GMC K1500 305E SWB
Posts: 42
Rep Power: 54
beerman is on a distinguished road
Default Re: More bad news for my 401

There is a listing on ebay that says they have .060 over
Good Luck


https://www.ebay.com/itm/14298856931...Bk9SR5i5sqL3YA
Reply With Quote
  #4  
Old October 9th, 2022, 02:04 PM
lizziemeister'sV6 lizziemeister'sV6 is offline
-= Dues Paid =-
 
Join Date: Aug 2013
Location: Strawberry Point, Iowa
Truck: 1965 Suburban Series 1000 - 351M with mechancal tachometer - PS & PB & 2 speed Pow-R-Flow automatic
Age: 68
Posts: 184
Rep Power: 107
lizziemeister'sV6 is on a distinguished road
Default Re: More bad news for my 401

Had this happen to one of my 351's - I doubt very much if you can bore this cylinder or others enough to clean it up for new pistons/rings. What I would advise is to keep searching for any sets of good pistons/rings that come along and then sleeved the block for the size pistons you have. You would have a much better chance getting a set of standard , .020 or .030 over than waiting for a set of .060 - but if they come along GET THEM when you can. It's good to have options.
Reply With Quote
  #5  
Old October 9th, 2022, 05:52 PM
Mike Caldwell Mike Caldwell is offline
Member
 
Join Date: Feb 2013
Location: Glendale, KY
Truck: 401 headed for '49 Willys PU
Posts: 71
Rep Power: 80
Mike Caldwell is on a distinguished road
Default Re: More bad news for my 401

I want to pull the crank to see if there's any other damage. Maybe I can get crank pulley off today.

Things are not looking good ;(
Reply With Quote
Reply

Bookmarks

Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bad news for my 401? Mike Caldwell GMC V6 and V12 Engines 4 September 22nd, 2022 09:36 PM
Re: [6066 GMC] I Got my 401, Some Good News and Some Bad Archiver Previous Forum Posts 0 July 14th, 2009 04:29 AM
Re: [6066 GMC] I Got my 401, Some Good News and Some Bad Archiver Previous Forum Posts 0 July 14th, 2009 03:04 AM
I Got my 401, Some Good News and Some Bad Archiver Previous Forum Posts 0 July 13th, 2009 02:08 AM
Bad News/GoodNews?BAD News Eastern Mini-Jamboree. Archiver Previous Forum Posts 0 November 12th, 2002 01:30 AM


All times are GMT +1. The time now is 04:29 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 951670365209|1669303748|0
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.