Bbc got a knock need advice - 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
  #1 (permalink)  
Old 10-04-2012, 01:48 PM
Registered User
 
Join Date: Jun 2012
Posts: 50
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Bbc got a knock need advice

I have a 81 chev short box bbc well done , I was out last night crusing around and I stoped and hit it , 3500,4000,4500,5000,5250 tic tic tic so i let off , I was sure it was a bad roller rocker that came outa adjustment so I turn and head home and off the gas/idle/part throttle nothing but under load or above 3000 it rattles and the more gas the louder it rattles , come home pull both valve covers hot and start shaking rockers , every one seems tight so i fire it up covers off and hear nothing , rev it up and knock knock knoc aorund 2500 rpm . my guess is a rod bearing so i dont want to run it much more but i took a video.

my engine is

block 14015445
heads 336781 with scorpion 1.7 roller rockers and arp bolts
intake edelbrock air gap
carb demon 825
Ignition msd digital 6 /pro billet dizzy/blaster ss coil
ceramic coated hooker headers long tube 3 inch mandrel exhaust

If i rebuild I would want to build for the nos and use a roller cam and all existing parts but of course im on a budget , please help
th400 3500 stall and a brake / 9 inch 3:73 31/18.5/15 rear tires
150 shot of nos never used
Attached Files
File Type: zip Motor noise 2.zip (1.68 MB, 31 views)

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-04-2012, 02:05 PM
Registered User
 
Join Date: Jun 2012
Posts: 50
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I can rebuild what i have with arp rod and crank bolts and change pistons to get the 10-1 i need or change the crank for more cubes , truck is a toy but I want to street drive it and track it as well in the summer , does 500hp seem outa reach for this ? Is a 150 shot going to blow it up? there seem to be some cheap rotating assemblies out there with crank rods and pistons but im lost as what to do
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
Need advice on 468 bbc quicksilver67 Hotrodding Basics 5 03-08-2011 06:37 PM
Engine knock diagnosis advice... Tyroma Engine 5 09-04-2009 11:36 PM
Bbc engine advice jackyandjoe Hotrodding Basics 6 06-15-2004 03:20 AM
Help!!! Knock, Knock, Knock coming from tranny 70bird Transmission - Rearend 1 05-06-2004 12:30 AM
Rod knock fix advice. M&M CUSTOM Engine 5 04-20-2003 05:48 PM


All times are GMT -6. The time now is 06:24 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.