engine swap question....need help fast!

[brokenheadz2003]

i have a 95 sl2 OBD1....and i have a 99 SL2 OBD2, can i swap the 99 into the 95 without a wiring harness swap,
all i wanna do is pull the old motor and put in the 99 motor without too much headache

is it even possible

[conflict325]

as far as I know I think u wont have any problems except for the coolent temp sensors. Because the 95 head has 2 therefor the wiring harness has 2 plugs for it.

The 99 head has one coolent temp sensor so you are going to have to do some kind of rigging or tap somewhere.

I could be wrong could the pros check me on this. Thanx

[Jeremy]

It will swap fine, BUT:

Like he said, the two cts thing is something you will have to deal with. On richies car we just hooked up the pcm sensor leads to the sensor and said f it. PCM will turn on the fan.

You will need to swap your 95 fuel rail and injectors onto the 99 manifold too. Your 95 has a return system and the 99's use the returnless crap.

You will need to deal with the exhaust too. The 99 has the 9 bolt exuast pattern and the 95 had the 5 bolt, so you wont be able to use your 95 manifold/ header/ whatever you have there.

Easiest thing to do would be to get a 99-02 manifold and downpipe from the boneyard or get an obx header or something lol.

[saturnspeed_12]

but jeremy maybe he would like to keep an eye on his temp, so need to tap sensor into the head somewhere. most likely right at the outlet on the head (where upper radiator hose clamps on).

[slowion2]

but jeremy maybe he would like to keep an eye on his temp, so need to tap sensor into the head somewhere. most likely right at the outlet on the head (where upper radiator hose clamps on).

take some copper pipe, drill and tap it for the sensor that gives the temp reading for the gauge, slice the radiator hose and clamp the pipe in-line with the sensor in it.

[Jeremy]

but jeremy maybe he would like to keep an eye on his temp, so need to tap sensor into the head somewhere. most likely right at the outlet on the head (where upper radiator hose clamps on).

take some copper pipe, drill and tap it for the sensor that gives the temp reading for the gauge, slice the radiator hose and clamp the pipe in-line with the sensor in it.

yeah forget that dude.

Just make a Tee with brass fittings and put it in the aeration return line.

[slowion2]

is it long enough on the harness side to do this? I mean either would work but I figured it wouldn't be long enough to get over there.

both should work though unless you really want to get an accurate reading. the coolant coming out of the head is reading dead on the same as the other sensor, as opposed to just the overflow, but that's not a huge deal for just a gauge.

[Jeremy]

They both come from the same side of the head.

[slowion2]

nevermind I'm thinking of an ecotec maybe. I thought they were on opposite sides or whatever.

[conflict325]

Yup it's on the same side one is higher then the other I remember from Gabbys swap.

[GTI]

Just for te record, isnt swapping a 99 engine to replace a 95 engine going to be less powerful because of the smaller ports? And wouldnt you have to swap te ECU in aswell? Also, I thought that the top left engine mount was different? Or maybe im tihnking of an 00+ model.

[Jeremy]

Just for te record, isnt swapping a 99 engine to replace a 95 engine going to be less powerful because of the smaller ports? And wouldnt you have to swap te ECU in aswell? Also, I thought that the top left engine mount was different? Or maybe im tihnking of an 00+ model.

no.

[conflict325]

Frank, as far as I know all is the Same, but you are right on the power thing because the 99+ models have the smaller ports. therefor they are slower the previous years. Thats my knowledge of course

[GTI]

Frank, as far as I know all is the Same, but you are right on the power thing because the 99+ models have the smaller ports. therefor they are slower the previous years. Thats my knowledge of course

I mean, I know te 3rd gens have the smallest ports out of all of them, but I was just wondering. I would have thought something would have been different as far as transmissions went with te computer.

[conflict325]

I dont really see why you'd have to swap the computer. I'm sure he could keep the 95 seen as how his wiring harness is the 95 one