I head swap

[bcusitsjeff]

Today I got a 173 dme and wire harness off a 90 325i at the junkyard today. I was wondering, would I be able to swap the head into my 85 eta without changing the intake manifold and stuff?
I know I'd have to modify my fuel rail a little but is that all?

[camip]

Without changing the intake you would get any gains from the head.

[jlevie]

You will need to install the I head, intake/throttle body, AFM, engine harness, CPS, injectors, FPR, and DME.

[bcusitsjeff]

damn, i guess ill just wait till friday to swap my head then.

would i need to swap the distributor also?

[jlevie]

would i need to swap the distributor also?

No, but you will need I ignition wires.

[bcusitsjeff]

damn i didnt get that when i picked up the stuff today

[MR 325]

I hope the head you're installing has been pressure tested and resurfaced as well.

[bcusitsjeff]

the guy at the machine shop said it was fine. soo hopefully everything goes smooth. thanks for your concern though...

[jlevie]

I've yet to see a used head that didn't have some warp. So I always have a light surfacing cut (~0.005") done. And I'll break down the head, have the valves ground, and install new seals. The shop I use has a cam profiler so the cam gets check for wear and buleprinted or replaced.

[bcusitsjeff]

he did do a vaccum check and that tested out fine. and he did do a light surface cut.
but other than that he told me the head looks fine. so hopefully all really is well.

if worst comes to worst and something happens to the motor ill probably just junk the motor and put in a m50 or something. lol.

[e30trooper]

Your harness is NOT plug and play. GL bro..

[MaksV]

You should also buy some rebuilt 19# injectors from me to go withthe head swap.

[bcusitsjeff]

besides connecting it to the fuse box and bridging wires for the OBC what would be different?

ive read strictlyeta's guide over and over hoping i can get this whole thing done in a day. lol.

as for injectors, i have 6 that i took from the junkyard. just gotta clean em out.

[MR 325]

The 85 Eta doesn't even HAVE the round plug that the 90 harness has. You need to make an adapter.

[e30trooper]

The 85 Eta doesn't even HAVE the round plug that the 90 harness has. You need to make an adapter.