Identifying 455 by VIN Stamp
#1
Identifying 455 by VIN Stamp
Good evening,
I have a guess but I don't want to taint the answers on this one....
My 455 is stamped from what I can read its 30C110961. Casting number is 396021F ("Stick" F).
Thoughts?
I have a guess but I don't want to taint the answers on this one....
My 455 is stamped from what I can read its 30C110961. Casting number is 396021F ("Stick" F).
Thoughts?
#2
1970 455 assembled in South Gate, CA
Last edited by allyolds68; October 26th, 2013 at 06:52 PM.
#6
The "E" heads are from 1970 as well, and the partial vin would have to match up to the vin on the car to be original. The vin will not tell you what it came out of if not original to the car.
#8
That's because the Tech section is A-body centric. Only full size cars were built at South Gate during the 1970 model year. West coast A-bodies were built in Fremont, CA.
#9
https://classicoldsmobile.com/forums...engine-id.html
and then realized that this list:
The letters are the assembly plant at which the car was assembled and the last 6 numbers are the order in which the car was assembled starting with 100001.
Here are the assembly plant codes.
B = Baltimore, MD
C = Southdate, CA
D = Doralville or Atlanta, GA
E = Linden, NJ
G = Framingham, MA
K = Kansas City, KS
L = Van Nuys, CA
M = Lansing, MI
R = Arlington, TX
W = Willow Run, MI
X = Fairfax or Kansas CIty, KS
Z = Fremont, CA
1 = St. Therese, Canada
2 = Oshawa, ON Canada
Here are the assembly plant codes.
B = Baltimore, MD
C = Southdate, CA
D = Doralville or Atlanta, GA
E = Linden, NJ
G = Framingham, MA
K = Kansas City, KS
L = Van Nuys, CA
M = Lansing, MI
R = Arlington, TX
W = Willow Run, MI
X = Fairfax or Kansas CIty, KS
Z = Fremont, CA
1 = St. Therese, Canada
2 = Oshawa, ON Canada
So I googled GM plants in CA and came up with "South Gate". BTW, South Gate was a BOP plant run by Pontiac
Last edited by allyolds68; October 27th, 2013 at 10:50 AM.
#10
Compression ?
Is there a way to tell if this motor was a low compression or high compression with pulling the heads off?
Also, Thank you all for the info. Nice to have a group with so much collective knowledge.
Also, Thank you all for the info. Nice to have a group with so much collective knowledge.
#11
70 should be a higher compression before the smog motors hit hard if it's original my 69 marine motor was rebuilt with lower compression guts but looking at the piston with the head of would tell you
Last edited by oldstata; October 27th, 2013 at 03:05 PM.
#12
A '70 455 could be either 9:1, 10.25:1, or 10.5:1.
The 9:1 pistons had a half-moon notch at the front-facing side.
The 10.25:1 pistons had a V-shaped notch.
The 10.5:1 pistons were flat tops, with no dish.
You can look in through a spark plug hole with a bore scope to see them.
- Eric
The 9:1 pistons had a half-moon notch at the front-facing side.
The 10.25:1 pistons had a V-shaped notch.
The 10.5:1 pistons were flat tops, with no dish.
You can look in through a spark plug hole with a bore scope to see them.
- Eric
#13
I found it by searching "assembly plant letters" on ClassicOlds, found this:
https://classicoldsmobile.com/forums...engine-id.html
and then realized that this list:
wasn't quite right because there's no such place as "Southdate, CA".
So I googled GM plants in CA and came up with "South Gate". BTW, South Gate was a BOP plant run by Pontiac
https://classicoldsmobile.com/forums...engine-id.html
and then realized that this list:
wasn't quite right because there's no such place as "Southdate, CA".
So I googled GM plants in CA and came up with "South Gate". BTW, South Gate was a BOP plant run by Pontiac
#14
A '70 455 could be either 9:1, 10.25:1, or 10.5:1.
The 9:1 pistons had a half-moon notch at the front-facing side.
The 10.25:1 pistons had a V-shaped notch.
The 10.5:1 pistons were flat tops, with no dish.
You can look in through a spark plug hole with a bore scope to see them.
- Eric
The 9:1 pistons had a half-moon notch at the front-facing side.
The 10.25:1 pistons had a V-shaped notch.
The 10.5:1 pistons were flat tops, with no dish.
You can look in through a spark plug hole with a bore scope to see them.
- Eric
#16
Old post but I thought I'd update. I bought a $16 lighted Borescope camera ebay and identified the pistons on my 455. It is 9:1 compression. Not sure what that changes but now I know. Cool tool if anyone else is curious or needs to inspect cylinder walls or pistons.
Now should I be picking a different cam with the lower compression to keep it semi matched?
Now should I be picking a different cam with the lower compression to keep it semi matched?
#18
You bet....
http://www.ebay.com/itm/151114740957...84.m1439.l2649
It was almost $19, not $16. Less than 20% over/under statement, so technically not a lie
http://www.ebay.com/itm/151114740957...84.m1439.l2649
It was almost $19, not $16. Less than 20% over/under statement, so technically not a lie
#20
Neat toy. I could really use something like that from time to time, and I've been reluctant to spend $200 on something that will be obsolete in 5 minutes. $20, on the other hand...
- Eric
- Eric
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