I Need Help With My Chevy 327, broken piston - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #16 (permalink)  
Old 08-19-2008, 01:58 PM
richard stewart 3rd's Avatar
Registered User
 

Last journal entry: 351W rebuild
Last photo:
Join Date: Jan 2006
Location: tremont, pa.
Age: 69
Posts: 2,217
Wiki Edits: 0

Thanks: 13
Thanked 15 Times in 14 Posts
this being a new cam you don't want to be turning it over as much as you've been doing, you will wipe all the lube off the lobes & increase your chance of a wiped lobe.
get the valves adjusted correctly before going any further
& turn the engine over by hand while doing this. this is also a good time to set timing as you will be sure your at #1tdc when
both valves are closed on #1 cylinder

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 08-22-2008, 01:20 PM
Registered User
 
Join Date: Aug 2008
Location: CALIFORNIA
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Okay it was a voltage problem. yesterday i cranked my motor and turned on fine for like 3 sec, same thing the second time. The third time it would not crank. A piece of the top piston broke it came out where the headers go. I pulled the spark plug and it was bent and the tip where it connects with the spark plug wire boot was broken. What caused this ? i check the other ones they are bit bent but not broken like the other one. Was the cam too big or did i have the wrong sparks plugs.
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 08-23-2008, 08:06 AM
Jmark's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,786
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Please try to keep only one thread running on the same problems. I have deleted the other two duplicate subject threads.

In your other threads, you also now add that you have a broken piston and bent spark plug electrodes. As stated in the other replies, you either had in the wrong plugs OR have too much cam lift for the pistons and they hit! A tear down is now in order to access the damage to ALL pistons, (most likely cracked) and to have a good shop check the bore in the cylinder with the broken piston and to check the rods for straightness.

Mark
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 08-23-2008, 09:24 PM
Registered User
 
Join Date: Aug 2008
Location: CALIFORNIA
Posts: 18
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Jmark
Please try to keep only one thread running on the same problems. I have deleted the other two duplicate subject threads.

In your other threads, you also now add that you have a broken piston and bent spark plug electrodes. As stated in the other replies, you either had in the wrong plugs OR have too much cam lift for the pistons and they hit! A tear down is now in order to access the damage to ALL pistons, (most likely cracked) and to have a good shop check the bore in the cylinder with the broken piston and to check the rods for straightness.

Mark
Only one of the piston tops broke all the other ones are fine the rods are straight its just that 1. So could be the spark plug??? or how can i tell if the cam has too much lift ?
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 08-23-2008, 10:16 PM
powerrodsmike's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Make a fiberglass fan shroud
Last journal entry: Next.. ..Bagging the king B (barge)
Last photo:
Join Date: Jan 2005
Location: gilroy, california
Age: 53
Posts: 4,108
Wiki Edits: 161

Thanks: 0
Thanked 3 Times in 3 Posts
If you have 1 broken piston, and all of the parts that you put in that motor were the same, (I'm assuming that you did use a set of matched pistons.. ), then you need to pull the heads and pan to see why. At the very least, you need to see if you smashed the upper ring groove.



It's just that simple.


Maybe you dropped a bolt or something down the intake, and that's what caused your mishap. ( I just tore one down last month for a guy who had too many people around his motor while his car was being built....stainless washer dropped down the intake, beat up the head and piston)

Maybe you put a piston in backwards.

Maybe you have some severely mismatched parts.


What kind of pistons did you put in that motor?
Are they high compression?


What are the camshaft specs?
If you have a high lift cam, and high compression pistons, did you check the valve to piston clearance with clay, like you were supposed to with a high lift cam and high compression pistons?



You will only be guessing until you start looking at the actual clearances that are present in your build.


You don't know that a rod is not bent until you actually look at it....You can not know if a ring land is not smashed now until you pull it apart.

Who selected the parts? Who did the machine work and fitted the pistons to the rods?


You are asking what could have caused this problem, but you have given us very little info to try to help you.



You say YOU rebuilt this motor, give us ALL the specs of what you have installed..


Later, mikey
__________________
my signature lines...not really directed at anyone in particular..

BE different....ACT normal.

No one is completely useless..They can always be used as a bad example
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Chevy 327 with a 3.48" stroke??? Chevelle Crazy Engine 9 01-12-2007 10:52 AM
Engine build ideas Rug Engine 23 12-25-2006 01:39 PM
Need One Piston For 348 Chevy JDUM Engine 9 01-06-2006 04:42 PM
Fan hit upper rad. hose!! mustangdude947 Engine 14 08-19-2004 03:52 PM
302 piston dim. compared to 327 piston Dave Y. Engine 2 09-25-2002 08:55 AM


All times are GMT -6. The time now is 11:06 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.