I'm putting an '87 924S engine into my '87 944. The engine harness needs to be swapped but is there anything else that needs to be done?

I'm also curious about the swap itself. I see that taking the engine out from the bottom is the better way. Does the whole drivetrain need to be dropped or can the tranny stay in place with the clutch/TT supported? Is there enough room to move the engine away from the clutch and lower it?

This Spring I swapped in a different tranny and did the clutch. No problems anticipated there.

 

I wouldn't even swap the harness.
Just plug in the new engine underneath the original wiring from the body.

 

The 924S engine harness is different, and there's a plug where it connects to the rest of the car's body wiring. On the early harness (924S) it's a different connector so yeah, just use the 944 harness. The main difference is the water temp sender for the cabin gauge but you can just connect the right wires and get it to work. Use the late 944 ISV.

 

I guess that's what I meant: use the 944 harness. The 924S engine has the harness still attached. You do point to leaving the harness on the car. Is that easier than pulling it with the engine?

 

Thanks... I'll look into the temp sender. And the ISV.

 

The location of the DMEs are different between the 924S and late 944s... so the harness actually also has a longer "tail", a different rubber firewall boot, and a different plug for the instrument cluster (by the DME plug). (As mentioned by Odonnell, the plug by the brake booster is also different.)

You can take the engine out the bottom without removing the tranny and moving the torque tube back, but you have to remove the fans and radiator to make enough room.

 

Totally, disconnect it and lay it to the side. Boom, ready to go. You'll have to fish out the oil level sender wire, but thats about the worst one. Pull the temp sensors from your 944 engine and use them in the 924S motor.

 

Thanks for the tips, gentlemen. I'm getting into it now.

Something odd is that the 924S engine has a 968 (?) water pump with the extra port for connecting to the overflow bucket. Any ideas on why that might have been done and if it's an improvement? I'm planning to get the elbow but would it be better to block the pump port or run the hose to the pump and block the port on the radiator?

 

Regarding the water pump. Porsche used a plastic adapter that has the block off already installed inside it. Porsche must have ran out of all the other water pumps and just used the updated turbo style water pump on the non turbos with the block off plastic part. The part looks just like the turbos but I found them to usually be white and have no passage thru it. The turbo ones that allow water to flow thru are black from what I have seen. So the port gets blocked off at the pump is what I'm saying if your not using a turbo set up. That housing is suppose to hold the small turbocharger thermostat on the 951/952. If you were to have a turbo then a hose would connect that to the front water crossmember pipe found only on the turbos and then take the coolant to the turbochargers y pipe bolted to the top of the turbo with the temp sensor on it. But you don't have a 951/952. So just cap it if it has a thru hole at the water pump. I had to do the same to my 944.

 

This sounds good. The engine doesn't have any adapter at all. I'll check the PET for P/N.

Thanks.

 

Thats the turbo pump, the s2/968 (3.0L) motors used a larger pump.

 

Here's the item. Mounted to the 924S engine.

 

That's just a turbo pump someone put on there. I bet the plastic block-off adapter was broken off when they pulled the engine.

 

Good. I've got the white block-off adapter on order: 944 106 313 00

 

Did you get the o-ring, too?