How do I Identify my vortec?
 

This is my first time dealing with a newer engine like this. I just picked up an '86 3/4 ton K5 blazer and it came with what the guy said was a "newer vortec motor with 30,000 miles" he said he got it from a salvage yard. Well now he wont call or email me back so im trying to figure this out on my own. Casting number as far as I can tell is 10243880. I got this number off the back passenger side of the motor.

Things Id like to know:

Year
Displacement
What it was used in
Any other nifty tid bits?

What I do know:
the heads have saw tooth markings
the intake has 4 bolts on each side.
driving 300 miles with it sitting on a tire in the back of lifted K5 blazer tied down with only bailing wire to the spare tire rack isnt a good Idea... but it gets the job done. :lol:

As always thanks in advance everyone.

Re: How do I Identify my vortec?
 

Are tha intake bolks angled & straight down..if they straight down..you have a vortec..

Re: How do I Identify my vortec?
 

Straight down. Im pretty sure I have a vortec I just want to figure out what year it is and what it might have come out of. the biggest reason is I have a guy who might want to trade for an 8.1 vortec but he needs to know what year.

Re: How do I Identify my vortec?
 

its a 350..

pull the pan and check the mains/rods.

Re: How do I Identify my vortec?
 

Ok thank you. What am I looking for? Any ideas what year?

Re: How do I Identify my vortec?
 

Is there a intake manifold on it?

Re: How do I Identify my vortec?
 

yup

Re: How do I Identify my vortec?
 

10243880 comes back to 96+ roller cam 350.

Sawtooth casting marks and 8 intake bolts sounds like Vortec heads.

Does the block have a casting date on it?
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Re: How do I Identify my vortec?
 

here's some info on vortecs

http://www.chevymania.com/tech/vortec.htm

Re: How do I Identify my vortec?
 

these are all of the identifying marks I know about. Is that the date stamp?

Re: How do I Identify my vortec?
 

these are all of the identifying marks I know about. Is that the date stamp?

Re: How do I Identify my vortec?
 

Both the block and heads will have the casting date on them

As far as I know all L31 Vortec long blocks are the same, aside from the 2 bolt/4bolt mains. The only differences I am aware of are with the PCM and the wiring.

Re: How do I Identify my vortec?
 

Yes the 2nd pic is the date code. It's hard to see in the pic, but it looks like it starts with a K which is the 11th month which is of course November. The next pair if numbers is the day of the month, and the last number is the year.

Re: How do I Identify my vortec?
 

it looks to me like k.03.03 which would be November 3 2003 right?

Re: How do I Identify my vortec?
 

96-2000

Re: How do I Identify my vortec?
 

I think your last digit is an 8. See how the 3 next to it has a flat top?

Re: How do I Identify my vortec?
 

Its very hard to tell. The pictures really do look as good as it does in real life. 8 makes more sense. Mileage doesn't really make much sense though. he said it was 30,000. Anyway thanks for the help narrowing this down everyone!