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  #1  
Old 02-11-2010, 03:13 PM
imiceman44 imiceman44 is offline
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How do you recognize a 401 visually?

I am going to check out a Cherk chief WT and the VIN says 401.
I need to verify that before I buy.
Does it have the dsplacement cast on the side like some other engines I know?
or is there other obvious signs like location of dizzy or oil fill or something?
Thanks in advance, and by the way I did try searching in every way I know and didn't find a thread about this.
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Old 02-11-2010, 03:15 PM
tkiller13 tkiller13 is offline
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It will say 401 on the block. Near the bottom on the side.
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Old 02-11-2010, 03:16 PM
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Look under the engine mounting brackets where they bolt to the block. It will give the casting number there in numbers about 2" tall. If it has no numbers it was a service block and could be any bore.
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Old 02-11-2010, 03:38 PM
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Chris and Elliott make it sound to easy. Here's the real version:

Put on the nastiest coverall's you can find. Grab a putty knife. Climb underneath and start scraping away all the goo, crud, grime and rust.

I promise you will eventually find those 3 golden numbers.
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  #5  
Old 02-11-2010, 03:44 PM
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grand_wag_85 grand_wag_85 is offline
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Look at where the motor mount bolts to the block



EDIT:
A big 4BBL and an air cleaner that says 401 on the yellow sticker should also say "Hey I'm a 401" but then again those parts can be swapped, only real easy way to tell is to climb up underneath.
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Last edited by grand_wag_85 : 02-11-2010 at 03:46 PM.
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  #6  
Old 02-11-2010, 03:47 PM
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Quote:
Originally Posted by Elliott
Look under the engine mounting brackets where they bolt to the block. It will give the casting number there in numbers about 2" tall. If it has no numbers it was a service block and could be any bore.

I think the no-number ones were the race blocks, that could be built anywhere from 5.0 -> 401+ depending on class rules, not many of those left, and those that are mostly have been run/punched out to where they are for the most part a who cares block, as you and I ain't goin to see one, much less care.

Mike D.
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  #7  
Old 02-11-2010, 03:50 PM
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grand_wag_85 grand_wag_85 is offline
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Quote:
Originally Posted by mdill
I think the no-number ones were the race blocks, that could be built anywhere from 5.0 -> 401+ depending on class rules, not many of those left, and those that are mostly have been run/punched out to where they are for the most part a who cares block, as you and I ain't goin to see one, much less care.

Mike D.

Weren't those ones also painted red instead of the AMC teal?
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  #8  
Old 02-11-2010, 04:34 PM
imiceman44 imiceman44 is offline
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thanks all for the replies.
It is as I guessed then.
Well wish me luck, it's a runner but supposedly is missing some smog stuff so can't pass a visual.
Well I know how to take care of that
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Old 02-11-2010, 04:44 PM
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Quote:
Originally Posted by grand_wag_85
Weren't those ones also painted red instead of the AMC teal?

'72 California engines were red. Service short blocks (and complete engines?) were black, as I recall... I don't remember seeing a service bare block in the day.
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  #10  
Old 02-11-2010, 04:50 PM
joe joe is offline
 
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Quote:
Originally Posted by mdill
I think the no-number ones were the race blocks, that could be built anywhere from 5.0 -> 401+ depending on class rules, not many of those left, and those that are mostly have been run/punched out to where they are for the most part a who cares block, as you and I ain't goin to see one, much less care.

Mike D.
The no number ones were factory replacement motors.
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  #11  
Old 02-11-2010, 04:54 PM
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fulsizjeep fulsizjeep is offline
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If you are upside down it looks like this:


Sean, looks like yours had a leak...
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  #12  
Old 02-11-2010, 04:58 PM
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Tatsadasayago Tatsadasayago is offline
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Brother had a no number block that came from the factory as a warrantee engine.
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  #13  
Old 02-11-2010, 05:15 PM
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grand_wag_85 grand_wag_85 is offline
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Quote:
Originally Posted by fulsizjeep


Sean, looks like yours had a leak...

Just a little bit
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  #14  
Old 02-11-2010, 05:23 PM
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I don't know about all that casting number and motor mount stuff. If it isn't located in SW Colorado and Flint and/or Krista aren't watching over your every move, it ain't a real 401.
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  #15  
Old 02-11-2010, 06:57 PM
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Quote:
Originally Posted by fulsizjeep
If you are upside down it looks like this:




Doing cartwheels in your rig again Flint?
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  #16  
Old 02-11-2010, 08:55 PM
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Quote:
Originally Posted by janie
Chris and Elliott make it sound to easy. Here's the real version:

Put on the nastiest coverall's you can find. Grab a putty knife. Climb underneath and start scraping away all the goo, crud, grime and rust.

I promise you will eventually find those 3 golden numbers.

Putty knife is good, ifn it don't look like this...

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  #17  
Old 02-11-2010, 09:23 PM
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grand_wag_85 grand_wag_85 is offline
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That's a cool pic Elliot. I'm guessing the casting #'s were graffed onto the block after they were cast?
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  #18  
Old 02-12-2010, 07:21 AM
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the #s are part of the casting
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  #19  
Old 02-12-2010, 07:34 AM
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fulsizjeep fulsizjeep is offline
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That is a purty color on yours Elliott.

shades of 401s...



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  #20  
Old 02-12-2010, 08:03 AM
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710 Burner 710 Burner is offline
 
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Now we know why Janie squints on one side. Try safety glasses.
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Quote:
Originally Posted by GrandWag&Prix
Actually, now that I think about it, that could be either awesome or really terrible.


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