New Crank won't spin - 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 04-24-2008, 07:11 PM
Registered User
 
Last photo:
Join Date: Sep 2005
Location: Gainesville, FL
Posts: 38
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Piston are a Sealed Power 423NP. I would take them back and have them install right but I am in a small town and it 40 miles to the shop and geting someone to take me there is a pain plus I need this motor to be done. The motor is a 92 4.3 V6 piston are new.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 04-24-2008, 07:37 PM
King of my Man-cave.
 
Last photo:
Join Date: Nov 2003
Location: Michigan
Age: 55
Posts: 2,837
Wiki Edits: 0

Thanks: 2
Thanked 4 Times in 2 Posts
Quote:
Originally Posted by gatliff
Piston are a Sealed Power 423NP. I would take them back and have them install right but I am in a small town and it 40 miles to the shop and geting someone to take me there is a pain plus I need this motor to be done. The motor is a 92 4.3 V6 piston are new.

The pistons will be clearly marked front with a notch on the top and and F near the end of the wrist pin bore. You need for 3 to be oriented with the notch to the front and the bearing tangs to the passenger side and 3 with the notch to the front and the bearing tangs to the driver side.

I'm still wondering about the bearing clearance. According to your numbers, you have .021" clearance.

tom
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 04-24-2008, 08:12 PM
Holder350's Avatar
Auto Parts Professional
 
Last photo:
Join Date: Feb 2005
Location: Whitesburg, TN
Posts: 1,037
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by machine shop tom
Has nothing to do with engine balance.

tom

Ahh I see,

I have heard some horror stories about getting them mixed up....


I guess the galling is due to the piston being in a bind in the bore.

Light Heavy is the term we always used I guess I just got to thinking that it had something to do with balance.
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 04-24-2008, 08:26 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,521
Wiki Edits: 326

Thanks: 679
Thanked 868 Times in 738 Posts
Quote:
Originally Posted by Holder350
Ahh I see,

I have heard some horror stories about getting them mixed up....


I guess the galling is due to the piston being in a bind in the bore.

Light Heavy is the term we always used I guess I just got to thinking that it had something to do with balance.
The problem is that the rod journal has a fillet or rounded corner at the edge of the crank throw and the rod/bearing also has a chamfer at one side. This chamfer must mate up with the rod journal fillet. If reversed, the rod/bearing will bind up. The piston has plenty of room to move laterally on the wrist pin, so it wouldn't necessarily bind the piston in the bore.
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 04-25-2008, 03:01 AM
King of my Man-cave.
 
Last photo:
Join Date: Nov 2003
Location: Michigan
Age: 55
Posts: 2,837
Wiki Edits: 0

Thanks: 2
Thanked 4 Times in 2 Posts
Quote:
Originally Posted by techinspector1
The problem is that the rod journal has a fillet or rounded corner at the edge of the crank throw and the rod/bearing also has a chamfer at one side. This chamfer must mate up with the rod journal fillet. If reversed, the rod/bearing will bind up. The piston has plenty of room to move laterally on the wrist pin, so it wouldn't necessarily bind the piston in the bore.
This doesn't apply to the 4.3. Each rod has it's own journal. There is no larger chamfer on one face of the rod as compared to the other.

tom
Reply With Quote Quick reply to this message
  #21 (permalink)  
Old 04-25-2008, 05:44 AM
Member
 
Last photo:
Join Date: Nov 2004
Location: Lakeland FL
Age: 65
Posts: 4,110
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
they assembled them wrong!!!...

ask them to accept them with the FEDEX or UPS next day charges collect ...and ship them back FEDEX/UPS next day!!!!

or else come pick them up for re-do...or buy you a tank of gas

if you and they have a bus station close by..."fair chance" you can get them corrected on a single day....

if they have any brains at all...
they will THANK YOU! for catching the error because otherwise they will/would be buying you a whole new motor by showing that wrong assmbled piston/rod to a judge in small claims court!!!!
Reply With Quote Quick reply to this message
  #22 (permalink)  
Old 04-25-2008, 06:33 AM
Registered User
 
Last photo:
Join Date: Sep 2005
Location: Gainesville, FL
Posts: 38
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The Piston are a Sealed Power 423NP std size. also are the bearing from a V8 fit the 4.3 rod
Reply With Quote Quick reply to this message
  #23 (permalink)  
Old 04-25-2008, 08:33 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,521
Wiki Edits: 326

Thanks: 679
Thanked 868 Times in 738 Posts
Quote:
Originally Posted by machine shop tom
This doesn't apply to the 4.3. Each rod has it's own journal. There is no larger chamfer on one face of the rod as compared to the other.

tom
Thanks Tom, too many 350's in my mind.....
Reply With Quote Quick reply to this message
  #24 (permalink)  
Old 04-30-2008, 11:42 AM
Registered User
 
Last photo:
Join Date: Sep 2005
Location: Gainesville, FL
Posts: 38
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Crank won't spin update

I got a guy to come and see what he can do with it he took it all back apart oil it all up big time got it back togetter and it spin better
but he think it still to hard so he took the 3 pistons out that was install incorrect and it still on the hard side
the only thing he see is one rod seem to be rubing the side.
right now the crank and the pistons are on the way back to the shop
how hard should this motor spin ? just as a short block
Reply With Quote Quick reply to this message
  #25 (permalink)  
Old 04-30-2008, 12:00 PM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
not very hard at all, I would think if you had a torque wrench you could spin it with less than 25 ft/lbs
Reply With Quote Quick reply to this message
  #26 (permalink)  
Old 04-30-2008, 01:56 PM
Registered User
 
Last photo:
Join Date: Sep 2005
Location: Gainesville, FL
Posts: 38
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Then maybe the rod is bent ? Then should the shop have check for this when they . if the rod is true why is there no side clearance for the one rod?
Reply With Quote Quick reply to this message
  #27 (permalink)  
Old 04-30-2008, 02:15 PM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
I guess if the shop didn't get the wrist pin centered on the rod it could cause some side clearance issues or if it was binding in the piston. The wrist pin should move freely side to side as well as rotate freely
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
267 crank into 350 block 74chevyflat Engine 6 08-26-2006 01:15 AM
Repairing a damaged crank by welding.. Old School Nut Engine 7 05-10-2006 08:05 AM
forged crank question Ratoflic Engine 2 04-18-2006 04:50 AM
I need a Crank!!! traub83 Engine 3 05-11-2004 08:56 PM
engine rebuild query re; crank rotation.. crazy larry Engine 9 08-04-2003 02:03 PM


All times are GMT -6. The time now is 06:38 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.