Help with block ID - Chevelle Tech
Engine General Engine Discussion.

 2Likes
  • 1 Post By Billdini
  • 1 Post By Billdini
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 14 (permalink) Old Jun 4th, 20, 9:14 AM Thread Starter
Lifetime Premium Member
 
Join Date: Jun 2003
Location: MN
Posts: 6,728
Help with block ID

This is a 76 350 block from a truck. Does this plug just above the timing cover tell you anything about the block? 3970010 casting number.
Attached Thumbnails
Click image for larger version

Name:	B619930A-A012-416B-9BB7-3D2CC74031E2.jpg
Views:	27
Size:	62.5 KB
ID:	628894  


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Jim_66SS is offline  
Sponsored Links
Advertisement
 
post #2 of 14 (permalink) Old Jun 4th, 20, 11:17 AM
Team Member
Bill
 
Join Date: Jan 2018
Location: Boston Area
Posts: 1,089
Garage
Re: Help with block ID

I have that same plug on my 68 327 L79. What is your engine code in front of the passenger head, block pad

Here is what I found searching the web

"That's the 1/8" NPT hole with the square-head plug at 11:00, just above the timing cover, on all Flint V-8's; the machining process was different for the front oil gallery intersection between Flint and Tonawanda, so Tonawanda blocks didn't have the hole or the plug. That's a key issue on Corvettes, as all Corvette small-blocks came only from Flint V-8 (as did all Z/28 302's). Photo below." (sorry photo is missing from the original post.)
- John Hinkley"
GLHS60 likes this.

Last edited by Billdini; Jun 4th, 20 at 11:42 AM.
Billdini is offline  
post #3 of 14 (permalink) Old Jun 4th, 20, 11:39 AM Thread Starter
Lifetime Premium Member
 
Join Date: Jun 2003
Location: MN
Posts: 6,728
Re: Help with block ID

Quote:
Originally Posted by Billdini View Post
I have that same plug on my 68 327 L79. What is your engine code in front of the passenger head, block pad

Here is what I found searching the web

"That's the 1/8" NPT hole with the square-head plug at 11:00, just above the timing cover, on all Flint V-8's; the machining process was different for the front oil gallery intersection between Flint and Tonawanda, so Tonawanda blocks didn't have the hole or the plug. That's a key issue on Corvettes, as all Corvette small-blocks came only from Flint V-8 (as did all Z/28 302's). Photo below." (sorry photo is missing from the original post.)
- John Hinkley"
Not sure how that is helpful, just the plant Z for fremont and sequence number along with the V for Flint, where it was built, the date, and the suffix code for the application. TBK suffix, assembled in May of 76.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Jim_66SS is offline  
 
post #4 of 14 (permalink) Old Jun 4th, 20, 12:32 PM
Tech Team
Eric
 
Join Date: Jul 2008
Location: southwest lower Michigan
Posts: 215
Re: Help with block ID

It is just a drilling that leads to the main oil galley in the block, the pipe plug was just the way the factory sealed it off after the drilling operation. It doesn't mean anything significant, basically it is just a potential point to either place an oil pressure gauge line, a lubrication line to oil a turbocharger, or a lube line to oil a air compressor for air brakes on big trucks.

Not a rarity or something that makes the block "special".
Ericnova72 is online now  
post #5 of 14 (permalink) Old Jun 4th, 20, 3:15 PM
Team Member
Bill
 
Join Date: Jan 2018
Location: Boston Area
Posts: 1,089
Garage
Re: Help with block ID

Quote:
Originally Posted by Jim_66SS View Post
Not sure how that is helpful, just the plant Z for fremont and sequence number along with the V for Flint, where it was built, the date, and the suffix code for the application. TBK suffix, assembled in May of 76.

You asked what it was and I found the answer for you. I do not understand how that is not helpful. Am i missing something?
blue_69_malibu likes this.
Billdini is offline  
post #6 of 14 (permalink) Old Jun 4th, 20, 5:16 PM
Lifetime Premium Member
& Administrator
 
Join Date: Apr 2005
Posts: 16,917
Re: Help with block ID

Sure it's not TKB - no TBK in 76
Mike is offline  
post #7 of 14 (permalink) Old Jun 4th, 20, 5:28 PM Thread Starter
Lifetime Premium Member
 
Join Date: Jun 2003
Location: MN
Posts: 6,728
Re: Help with block ID

Quote:
Originally Posted by Mike View Post
Sure it's not TKB - no TBK in 76
Yes TKB transposing error.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Jim_66SS is offline  
post #8 of 14 (permalink) Old Jun 4th, 20, 5:32 PM Thread Starter
Lifetime Premium Member
 
Join Date: Jun 2003
Location: MN
Posts: 6,728
Re: Help with block ID

Quote:
Originally Posted by Billdini View Post
You asked what it was and I found the answer for you. I do not understand how that is not helpful. Am i missing something?
Didnít mean it the way you took it, sorry. I was looking for weather it might be a 2 or 4 bolt.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Jim_66SS is offline  
post #9 of 14 (permalink) Old Jun 4th, 20, 6:34 PM
Senior Tech Team
 
Join Date: Dec 1998
Location: Lubbock, TX
Posts: 4,456
Re: Help with block ID

No way to tell with that casting number, I've had both.

Gary Adrian
Organized people are just too lazy to look for their stuff...
Busted Knuckles is offline  
post #10 of 14 (permalink) Old Jun 4th, 20, 6:45 PM
Lifetime Premium Member
& Administrator
 
Join Date: Apr 2005
Posts: 16,917
Re: Help with block ID

Quote:
Originally Posted by Jim_66SS View Post
Yes TKB transposing error.

Here you go:
TKB 76 350 165 4B,AT TR
Mike is offline  
post #11 of 14 (permalink) Old Jun 4th, 20, 8:52 PM
Tech Team
Chris
 
Join Date: Jul 2009
Location: Auckland, New Zealand
Posts: 414
Re: Help with block ID

If the motor is an original, unmolested core, and has an 8 in balancer, then chances are it is a 4-bolt. Particularly as it is a truck motor. Otherwise drop the pan if you can!
chrisstandring is offline  
post #12 of 14 (permalink) Old Jun 4th, 20, 10:00 PM
Team Member
Bill
 
Join Date: Jan 2018
Location: Boston Area
Posts: 1,089
Garage
Re: Help with block ID

Quote:
Originally Posted by Jim_66SS View Post
Didnít mean it the way you took it, sorry. I was looking for weather it might be a 2 or 4 bolt.
Thatís why I mentioned my 327 has it although my 68 is a large journal crank like the 350. All 327ís are 2 bolt. I was wondering why my block had it but thought it was just an old block thing until your post.
Billdini is offline  
post #13 of 14 (permalink) Old Jun 5th, 20, 12:02 PM
Lifetime Premium Member
& Administrator
 
Join Date: Apr 2005
Posts: 16,917
Re: Help with block ID

Quote:
Originally Posted by chrisstandring View Post
If the motor is an original, unmolested core, and has an 8 in balancer, then chances are it is a 4-bolt. Particularly as it is a truck motor. Otherwise drop the pan if you can!

Or stick a USB type camera into the drain plug bung and have a look-see.
Mike is offline  
post #14 of 14 (permalink) Old Jun 5th, 20, 2:56 PM Thread Starter
Lifetime Premium Member
 
Join Date: Jun 2003
Location: MN
Posts: 6,728
Re: Help with block ID

Quote:
Originally Posted by chrisstandring View Post
If the motor is an original, unmolested core, and has an 8 in balancer, then chances are it is a 4-bolt. Particularly as it is a truck motor. Otherwise drop the pan if you can!
Yes appears unmolested, except for head, intake, and possibly cam change. And big 8" balancer.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Jim_66SS is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome