Rare 396/375 or just another 396? - 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 06-11-2012, 01:38 PM
Registered User
 
Join Date: Jun 2012
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Rare 396/375 or just another 396?

I'm a newbie and have a couple questions if someone could help.

I bought a 68 Camaro, well wife did for my 40th b-day, and was told it may be a rare L78? This is what the block numbers are saying:

Date Code C26 8 - March 26, 2008
Cast #: 3955272 - 396/375
Stamp: T0414JH 19W79942

I have been fighting a miss and found a broken valve spring. Can't seem to find what spring to replace it with! They're double springs.

Head Cast # 672292

From what I have found, these are from a 70's 402/454, Oval Port, Open Chamber, 2.06 intake, 1.72 exhaust and 110cc.

Are these good heads for this motor? Are they degrading the performance? If I need to replace the heads, I will still need to replace the spring until I can get better heads. Still want to cruise around. I was told that the reason I had some bent rods and broken spring is because the motor is too much for the heads?

Any suggestions?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-11-2012, 02:40 PM
poncho62's Avatar
Out of the Loop Moderator
 
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Location: Hanover, Ontario, Canada
Age: 62
Posts: 16,899
Wiki Edits: 5

Thanks: 20
Thanked 261 Times in 213 Posts
Dont know about the numbers, but the L78 had square port heads......4 bolt mains, forged crank and pistons.....
__________________
Ontario Rodders

Budget RVs
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-11-2012, 02:55 PM
OneMoreTime's Avatar
Hotrodders.com moderator
 
Last wiki edit: Health and safety in the shop or garage
Last journal entry: Yard Dog pic
Last photo:
Join Date: Jul 2004
Location: Washington State
Age: 69
Posts: 7,380
Wiki Edits: 3

Thanks: 48
Thanked 151 Times in 143 Posts
Most likely the engine has been replaced...Pull the heads have the valves done..new set of springs and pushrods and go have a good time..

Typically bent pushrods and broken springs come from overrevving the engine..

Sam
__________________
I have tried most all of it and now do what is known to work..
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-11-2012, 07:58 PM
Madmax305's Avatar
Registered User
 
Last photo:
Join Date: Jan 2010
Location: Brea, Ca.
Posts: 249
Wiki Edits: 0

Thanks: 1
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by poncho62
Dont know about the numbers, but the L78 had square port heads......4 bolt mains, forged crank and pistons.....
Yes, they were the rectangular port heads with a closed chamber design. The pistons were trw pop-ups with a 11-1 compression ratio...I remember my 70 Camaro SS L78 very well....
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-11-2012, 11:43 PM
Registered User
 
Last photo:
Join Date: May 2009
Location: S/E Michigan
Posts: 650
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
This number(19W79942) is a partial VIN
1= Chevrolet
9= 1969
W= the assembly plant
79942 should match the end of your VIN, but it probably wont, because your car is a '68, and Camaro's werent assembled at Willow Run Assembly(W).

Somewhere along the line the motors been replaced.

You'll want to look at your Body tag on the firewall or cowl and decode that to help figure out how your car was originally built.

If the repairs make the car run good, drive it and enjoy it while you research its background.

Edit: AAnd that casting date would be 1968. Are you sure that last digit is 8, not a 9.
The JH code wasnt used for the 68 Camaro, but was for the 69 Camaros, Novas, for the 375/396.
Looks like youve got a 1969 375/396 block, that was installed in a Nova on 4/14/69.

Last edited by FmrStrtracer; 06-11-2012 at 11:56 PM.
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
396? scotttripp Engine 1 01-23-2012 07:08 PM
My 66 SS 396 Springer Hotrodding Basics 9 04-16-2011 03:11 PM
Stock 70 Chevy 396 375 hp questions beertracker Engine 7 01-11-2011 06:05 PM
Rare 65 Chevelle 396 4 bolt block Fastest65 Engine 10 07-02-2008 09:37 AM
Is it a 396/350 or a 396/375 hollywoodbob Engine 12 07-30-2003 10:51 AM


All times are GMT -6. The time now is 04:34 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.