TRY MEHH

iTrader: (1)

i have a 243 stamping on my heads witch is ls2 heads i know....

the guy told me it has a ls3 in it i have a feeling it is not a ls3 for sure beacuse ls2 heads wont bolt to an ls3 i dont think unless doing some conversions

from what i read the ls1 has a knock sensor under the intake and not on the side of the block

however the block i have has a knock sensor near the oil filter
here is a pick "im pretty sure its a knock sensor"

sorry for bad quality i took with my phone =/




any help will be nice thanks!

TRY MEHH

iTrader: (1)

TRY MEHH

iTrader: (1)

vid of car kinda bad but its something lol
http://www.youtube.com/watch?v=K_xva...er_profilepage

99 Blue Bird

iTrader: (3)

i cant tell what that first pic is at all. put the car in the air and look and see if you can see what is stamped on the back of the block. and i think 243s can bolt onto LS3 blocks just the same as Ls3 heads can bolt on 4 inch bore gen 3 blocks

jsmith564

^ word! what he said

TRY MEHH

iTrader: (1)

ive tried seeing block stamping but i could not see it its nearly imposible lol i need a cam to see up there ill put another pic up

TRY MEHH

iTrader: (1)

i tried to lighten the pic up hope that helps?

flintwrench69

iTrader: (11)

They used 243s on other motors like the 5.3 FWD LS4 & we had a 5.3 truck in the shop the other day with some 243s on it. They will bolt to an LS3 but I dont know why someone would when the LS3 heads flow so much better unported.


That sure looks like a knock sensor plug, blue wire too.

flintwrench69

iTrader: (11)

Wow LS1 intake(has EGR pipe going to intake) & cathedral port heads on an LS3? Doesnt sound right. More likely its a 5.3 engine. Or its an LS1 & thats just where they decided to put the knock sensor because its a PITA to get to under the intake. 2006 & earlier V8s have the knock sensors under the intake but 2007 & newer have them where yours is but the newer ones look different & have a different connector. The one on your TA looks like the older knock sensors from the 90s, including the connector. A better pic of the sensor would be nice. A casting number off the block would be more helpful. I take it you havent owned the car too long?

09camaro383

iTrader: (2)

1- check behind the water pump and check if you see any wires??
2- is your block aluminum?
3- ls3 cracks have a 58 tooth reluctor wheel so you need a Lingenfelter converter do you have it?

TRY MEHH

iTrader: (1)

i am not sure how to see the reluctor block is aluminum im not sure if wires are ran behind water pump but i will look soon but can they run wires differently so u dont need to go behind the water pump

Paul Bell

iTrader: (9)

It could be a lot of different blocks, even an LS1 with the knock sensors re-located.

You'll need to find the block casting numbers and post them up.

TRY MEHH

iTrader: (1)

it would be easy if the block wasntt located way back in the engine bay....

did ls1 motors come factory with knock sensor on side

Paul Bell

iTrader: (9)

NO. They were under the intake valley cover.

Several unused threaded bosses on the side of the block can be drilled & tapped to have them on the side. Also, this is the way to get LS1 knock sensors to work on non-LS1/6 blocks.

chrisfrost

iTrader: (8)

All the gen4's have the cam sensor in the timing cover so that would'nt tell him anything unless it's a known 2005 or 2006 year engine . Pull the crank sensor right behind the starter and look in there with a flashlight or something and turn the crank and count .

09camaro383

iTrader: (2)

if it's an aluminum block it could be an ls2 like from a gto 6.0 or maybe and ls3 the only way to know is if you look behind your block

Steve01SS

iTrader: (43)

It "could" be an LS3 with Ls2 heads and an LS1 intake... if they were trying to throw it together cheap.

I would guess a Gen IV motor, with the knock sensors on the side. I don't know why someone would go through the trouble to relocate the knock sensors on a Gen III.

Hard to say without more info.. Is the block made of aluminum or iron?

Paul Bell

iTrader: (9)

In your other thread, you state that the seller told you the car has the "LPE conversion".

https://ls1tech.com/forums/14770561-post12.html

This "could be":

Their 58x to 24x converter box OR

They changed the block sensors to work with a LS1 PCM.

This deepens the mystery. Could this be a 58x motor?

http://www.lingenfelter.com/mm5/merc...w=&range_high=

I do think you should've asked a few more questions before you bought the car. This is not saying you got ripped off but it'd be nice to know what's custom or "non-original" on this car-so you could service it.

Is the block aluminum? Can't tell? See if a magnet sticks to it. How many knock sensors do you see on this block? Is it possible that the plug in your picture is an engine block heater?

TRY MEHH

iTrader: (1)

aluminum block

my brother has a ls1 t/a and we was matching motors there is minior things strange about my motor but it has been pulled im sure of that maybe things wasnt hooked up the same? but come to see there is a stamping on front of my block saying B1 i have no clue what it means but my brothers ls1 did not have that stamping it was right above water pump

TRY MEHH

iTrader: (1)

ive only found 1 its very hard to see other side of block i have kooks headers and takes alot of space
i had a shop look at it its a knock sensor for sure