mentiroso

Ok I thought I had a LS1 with the LS2 heads (243 cast # on them). Today I got the first oil change and the filter for the LS1 does not work. The oil change place tried one (#wp48?) and it worked. Guy said those are like 06 and up engine filters. Anyone have any clue what engine I would have based on that? Sorry there isnt more to go on. When I first joined someone told me where to find cast numbers but I never could find them so if someone can point that out again I can look again, maybe a picture would help?

Anyway just trying to figure out what I am working with here.

babbage1109

iTrader: (11)

how many liters of oil were used....what car is it...mods all that crap

mentiroso

Sorry, forgot my sig was gone

1999 Trans-Am
6 quarts were used (Mobil1)
SLP Lid, headers, x pipe, straight pipes into dual bullet mufflers

babbage1109

iTrader: (11)

probably a lq4 or 9. how long have you had the car? previous owner ever mention it?

mentiroso

I bought the car from a dealer in South Florida. The salesman told me the previous owner had put $5000 into the engine (complete swap) but he did not know details. I assumed the salesman was lying but I did not care. The price I paid for the car was fine even if it had the stock LS1, I just wanted a fun daily driver.

babbage1109

iTrader: (11)

6 liters is not stock lol idk if there are any identification numbers on it. might have to check around

mentiroso

Yea if anyone could tell me an easy way to spot what engine I have for sure I would appreciate it. Like I mentioned, I know the heads are the LS2 heads because of the 243 stamp. Anything else I can easily spot without having to lift the car?

jim ravencraft

Hi,
please find attached numbers courtesy of will handzel. He authored many books and is well versed on ls engines. I hope this helps you! have a blessed day..jim

mentiroso

Excellent list thank you for posting! Where would these numbers be located though?

coolmanvette75

iTrader: (2)

most likely its a 6.0 or some sort (ls2, lq9, lq4)

mentiroso

Would the LQ4 or 9 use the 243 heads?

coolmanvette75

iTrader: (2)

im pretty sure their stock heads are 317. people put on the 243 heads to bump up the compression

jim ravencraft

Hi,
the casting number is located on the engine block at rear drivers side bank. You can't miss it. This is true for all third and fourth generation...... Have a blessed day. Jim

mentiroso

Ok will have to check that out tomorrow, little too dark outside and I do not have a flashlight. Thanks for all the info guys, big help!

mentiroso

Well one more question, is that on the side of block towards the tire or on the back towards the firewall?

ovaboost

iTrader: (4)

left side back by firewall and what does it have for intake manifold? i bet its an ls2 is the block iron cast or is it aluminum thats another way to tell if its lq or ls motor

mentiroso

Not sure what it is, I should probably know the difference but sadly I dont. Here is a pic I took when I first got it.

http://mobiletechspecialist.com/firebird/100_2163.JPG

If that helps?

ovaboost

iTrader: (4)

the iron cast will be black dark color and the aluminum will be silver in color. That manifold looks like an ls1 or ls6.. ls2 manifold have the 90mm tb and 4 bolts that bolt the tb on

TheBlackPlague

iTrader: (1)

lq9 -lq4 = cast iron block. quick check with a magnet.

mentiroso

Ok, magnet did not stick. I stuck it right in front of where the headers attach, seemed to be the easiest spot to hit in the dark, checked it and all around it, did not stick to anything.