What year is my engine?
#1
What year is my engine?
Long story short, I've got a LT1, and I'm not sure what year it is. I am kind of suspicious that its not a 95 like I was told by the guy that sold it to me. I'm pretty sure I saw on the throttle body the clock style date stamp with a 93 in the middle. The exhaust ports are D-shaped, and I thought they were round on the 93s and D-shaped on the 94-95s. If its not a 95 like the guy said it was, looks like I'm in for some fun when I wire it up. So how do I tell what year it is?
#2
Re: What year is my engine?
93s had D ports as well.
Check the bottom of the opti. If there are two small vent tubes coming out towards the driver side, it's a 95. Otherwise a 93-94.
Also, 93s on the fuel rail, had only one crossover tube in front while 94-95 had two. (front and back)
Check the bottom of the opti. If there are two small vent tubes coming out towards the driver side, it's a 95. Otherwise a 93-94.
Also, 93s on the fuel rail, had only one crossover tube in front while 94-95 had two. (front and back)
#3
Re: What year is my engine?
If I recall, there is only one vent on the opti, downward at about a 45 toward the drivers side, and there are 2 crossovers on the fuel rail. I guess that makes it a 94.
#6
Re: What year is my engine?
Somewhat unrelated question: Why do some advertisers say that 93 and 94/5 headers are not interchangeable? I've been shopping around for some LTs and thought it was because the ports had a different shape, but since I've been enlightened, what's the difference?
#8
Re: What year is my engine?
basically the AIR tubes that screw in have larger diameters, i had to get 93-95 AIR hoses for my car when i bought my AS&M headers, the physical design is the same, except 93-95 had 1 cat 96-97 has two.
#9
Re: What year is my engine?
Originally Posted by CreatiVe2
basically the AIR tubes that screw in have larger diameters, i had to get 93-95 AIR hoses for my car when i bought my AS&M headers, the physical design is the same, except 93-95 had 1 cat 96-97 has two.
#10
Re: What year is my engine?
is it just the pass. side AIR connection is moved further to the front of the manifoldon the 93-95?
and Inj. i was saying i had to get diff diameter due to the fact that i put 93-95 headers on my 97. thats the only converging difference that i think i came across.
and Inj. i was saying i had to get diff diameter due to the fact that i put 93-95 headers on my 97. thats the only converging difference that i think i came across.
Last edited by CreatiVe2; 06-16-2005 at 04:28 PM.
#11
Re: What year is my engine?
I checked the number, and it's a 94. I knew that a** lied to me. Anyway, can anyone think of any wiring differences between 94 and 95 off hand that I may run into? And is the intermediate pipe on the V6s the same as the V8s from the cat to the muffler? I want to keep the catback, and go with new headers (obviously), y pipe and cat delete pipe.
#12
Re: What year is my engine?
If you have a 95 harness, you are all set. (unless you don't have the 94 opti harness) If it's a 94, there will be a few issues.
Junkyard people will lie 95% of the time from my experience with buying LT1s.
Junkyard people will lie 95% of the time from my experience with buying LT1s.
#13
Re: What year is my engine?
I have the 94 harness and PCM. I didn't look to see what year the trans is, but I don't think it matches up. It was all wired up when I got it (engine that is, trans was separate). He told me it was out of a 95 T/A M6. Despite the trans not wiring up, what issues will I have? I think the 4 plugs that go to the dash harness are the same. Am I going to have to get a new PCM if it was for an auto?
#14
Re: What year is my engine?
The connector on the 94 engine harness should connect to any 94-97 tranny. If it doesn't connect, you either have a manual tranny harness or the transmission is a 700R4. (or something else)
There will be a few wires that need to be swapped around in order to make it work besides that. I might post details later on if I have time.
There will be a few wires that need to be swapped around in order to make it work besides that. I might post details later on if I have time.
#15
Re: What year is my engine?
The trans is a M6, and I think I have an auto harness. I think there were more connectors on the harness than there were on the trans.
EDIT: Does that mean the PCM isn't going to work with the M6, if it was originally for a A4?
EDIT: Does that mean the PCM isn't going to work with the M6, if it was originally for a A4?