Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
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> Hotrodding Basics> sbc markings
User Name
Password
lost password?   |   register now

Thread: sbc markings Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

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.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
02-29-2012 09:15 PM
dadshogshop
Quote:
Originally Posted by DoubleVision
Guess What? This thread is 4 years old.
HA HA HA HA then the jokes on me, I don't see to good any more They need to take them down after so long, Dad
02-29-2012 08:14 PM
DoubleVision Guess What? This thread is 4 years old.
02-29-2012 08:00 PM
dadshogshop
Quote:
Originally Posted by chevyman420
does the 010 on the side of the block signify anything i've heard that it means four bolt but i'm not sure

I remember years ago when I worked in a Salvage Yard that the old man at the counter sold 350 4 bolt engines per the 7th bellhousing bolt hole at the top, and the casting number 3970010 meant that it was for sure a 4 bolt, guess what,, I proved him wrong one day on a bet. It can be either 2 or 4 bolt. Even the # 3970010 on the back of the block, does not mean it is 4 bolt. That number was used on both 2 and 4 bolts. This number was to mean it had 10% nickle, As for as the .010 on the side or under the timing cove or where ever it might be, came along at a later date, say "80's, I have always been told it meant a 10% nickel content, hence the cylinders held up better for ware. The only way I would believe it for sure is to see it written down in a GM specs book somewhere... Dad
04-04-2008 08:30 AM
XNTRCI-T I'm pretty sure the 010 and 020 were on the back of my block, but I wouldn't bet a paycheck on it.
04-03-2008 03:10 PM
glen242
Quote:
Originally Posted by DoubleVision
The marks on the rear or under the timing chain cover 010 and 020 represent the percentage of tin and nickel in the casting as mentioned, but on the side it means elsewise.
I thought the only place the tin, nickel numbers were found was under the timing cover. That was the only place my engine had them ('76 'vette).

You are correct as far as any numbers on the sides.
04-03-2008 02:40 PM
DoubleVision The marks on the rear or under the timing chain cover 010 and 020 represent the percentage of tin and nickel in the casting as mentioned, but on the side it means elsewise.
04-02-2008 06:12 PM
XNTRCI-T
Quote:
Originally Posted by DoubleVision
Is the casting number 3970010? notice it ends in 010? this is common on these casting number blocks cause its part of the casting number. The past rumour of that 010 marking on the side indicates a 4 inch bore, but this has never been confirmed either as the true meaning, so it reflects back to what I just said, it means 3970010.
If you're asking me, yes the block casting number is 3970010. The 010 and 020 marks on my block are on the back of the block inside of the bolt circle for the bellhousing. I have a photo somewhere... I'll look for it.
04-02-2008 05:21 PM
DoubleVision Is the casting number 3970010? notice it ends in 010? this is common on these casting number blocks cause its part of the casting number. The past rumour of that 010 marking on the side indicates a 4 inch bore, but this has never been confirmed either as the true meaning, so it reflects back to what I just said, it means 3970010.
04-02-2008 03:08 PM
XNTRCI-T My block has both 010 and 020 on it. It is a '79 350 out of a truck, 4-bolt. I have heard the 1% nickel - 2% tin explanation many times, including from the racing engine shop that built my short block. I don't know for sure if it's true, but it does help me sleep better at night!
04-02-2008 02:47 PM
starnest
Quote:
Originally Posted by xxllmm4
I think the whole nickel tin thing is a big myth also. It supposedly means 010 is 1% nickel and 020 is 2% tin. Correct me if i'm wrong but If it was 10% nickel and 20% tin it would no longer be cast iron.

Jordon
Actually 10% was a typo, it is .010 or 1%. And I wasn't there, but from what I understand the earlier castings did not have any markings and the nickel content was negligible.
When high performance and heavy duty applications (early to mid 60s) caused blocks to fail, they started adding nickel to strengthen the blocks. By 1970 almost all blocks were cast with 1% nickel content, thus all of the blocks had 010 in the castings.
As for 020, my understanding is 2% nickel was used (I hadn't heard of using tin). I've never seen a block with 020 casting.
I can't recall where I read about this, and as always even if it's in writing, don't make it so.
04-01-2008 03:07 PM
xxllmm4 I think the whole nickel tin thing is a big myth also. It supposedly means 010 is 1% nickel and 020 is 2% tin. Correct me if i'm wrong but If it was 10% nickel and 20% tin it would no longer be cast iron.

Jordon
04-01-2008 02:59 PM
Double_v23 That is just a myth, all blocks from that era had comparable amounts of nickel in them. Sometimed they put 010 on one side and 020 underneath it. So does it have 10 and 20 percent nickel? nope.
04-01-2008 02:23 PM
chevyman420 so it does mean something and it is stronger then because i think i got that from Mortec.com
04-01-2008 02:20 PM
starnest
010 is 10% Nickel

Actually from some research I did on small blocks, the 010 cast into the side of the block signifies the percentage of nickel used in the iron for the casting. The 10% nickel content adds strength to the iron.
04-01-2008 02:16 PM
chevyman420 OK cool but if i remember correctly i think i read somewhere that it means that there is more nickle or something and that it's stronger?
This thread has more than 15 replies. Click here to review the whole thread.

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


All times are GMT -6. The time now is 11:02 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.