bp dohc bolt up?

[quickshift]

i got a crate engine on my hands, and its obviously mazda, but the valve cover says ford. markings on it have "bp dohc" so im assuming its a 1.8 that was in an escort or something.
so i was wondering, would this bolt into my gf's 1.6 sohc chassis. mainly, are the motor mounts and transmissions compatible?

[OsoSlo z28]

since you have the sohc, everything bolts up fine.

[quickshift]

what about wiring harness and ecu. will they connect to the bp dohc as well? did the bp's use a vaf as well to measure air intake?
this is just for a daily driver with fuel economy in mind, so performance and what not isnt a bit concern.

how much more power can be expected out of this motor? any issues bolting it up to an atx 1.6 tranny

[quickshift]

oh, and will the accessories and their brackets bolt onto the block with no issues?

i.e. alternator, power steering, etc...

<small>[ October 15, 2004, 01:51 PM: Message edited by: QuiCKSHiFT ]</small>

[LongJohn]

Good question. I just looked at my drive pullies. On the SOIC (currently in the car) both the inner and outer belts are ribbed. On the BP (getting rebuilt), the inner is a V. The inner one drives the water pump (also a V on the BP) and the alternator. This means we will either need a new alternator or be able to swap pullies on the alternator. I doubt that a junk yard will sell you just the pully from an alternator.

I doubt that the drive pully from the SOIC would bolt onto the timing gear on the BP. Oh well, time to shop for an alternator.

[quickshift]

ugh... so if the bp i have sitting in a crate doesnt have any of the accessories already on it, i will have to go and purchase new brackets and accessories as well?

i was hoping it would be similar to the swap in my car.
i have a first generation ford probe gt (i.e. mx6)
i got a jdm motor called the "fe3", and it was bare of accessories. but because the motors were similar, the brackets for the alternator, power steering, a/c, were the same on both the stock f2t, and the new fe3.
so perhaps someone could check if the same applies to the sohc brackets, fitting onto the bp block, and therefore you could reuse the accessories from your stock sohc.

edit
futhermore... isnt the waterpump independant of all the accessories? the waterpump is inside the timing cover, and driven by the timing belt, is it not?
then right outside, is the crank pulley, on which the inner belt drives the alternator
and the outer drives the powersteering and a/c

<small>[ October 17, 2004, 10:11 AM: Message edited by: QuiCKSHiFT ]</small>

[atlantamx3]

All of your accessory brackets will bolt up to the BP block.

Check the other post in this section which answers all these questions as well.

(Its pretty much the same topic too)

<small>[ October 17, 2004, 10:18 AM: Message edited by: atlantamx3 ]</small>

[LongJohn]

I think Atlantamx3 (from the other thread) is correct. You just need to get a new alternator. Brackets and things are the same.

The water pump has it's own pully and it shares a belt with the alternator. The water pump pully is the one immediately above the drive pully.

[quickshift]

ok, so if the brackets bolt up, then so do all the accesories. only thing that will be different is the crank pulley. so in that case, why do you need a new alternator and belt? just re use everything from the sohc, as long as the crank pulley is more or less alike

if not, i will just swap pulley's on the alt. i have a lot of different motors here to go go through, im sure i can find a matching pulley... anyone have a picture or tell me what the difference between the two is?

[atlantamx3]

The crank pulley also is the harmonic balancer for the crank.. so I would not try messing with it or switching it.

The water pump on the BP uses a V-belt, as does the Alternator. You COULD switch the pulley on the alternator I guess...but why chance it? A new alternator is not very expensive, and you will have the right one with the right pulley and everything.

The crank pulley on the BP is a v-belt/ribbed belt combo (V-belt runs the water pump & alternator, the ribbed belt runs the power-steering/AC if you keep that.). The SOHC is a ribbed belt/ribbed belt combo.

[quickshift]

yea, i have no intention of switching the crank pullies
im gonna inspect the bp in the crate a bit more thoroughly, and if i end up doing this swap, i will see whats the easiest and simplest thing to do

just nice replacing that old sohc with a fresh 0km bp in her car.

[quickshift]

ok, well i checked out the bp dohc sitting in my crate today. it has all the accessories already bolted up, and belts are all there, its ready to go. if go through with this swap, it will sure be nice driving around with a new motor

only two things remain in my mind:
1) this is gonna be bolted up to an ATX tranny, but i dont see any issues, does any one else?
2) going to be using stock wiring harness and ecu, but would like to take advantage of vics. whats the easiest way to wire it up so it goes of as needed

[Typhoonk]

For wiring. If you want to use the MX-3 SOHC wiring harness, that is fine, just have to run some extra wires.

1. Have to redo the injector harness. Injectors are farther apart, as well has the temp sensor is on the side of the BP instead of on top of the intake plenum, as with the SOHC. And you will have to wire the V.I.C.S. If you want that to work(don't need it to run).

2. Need a TPS from an automatic BP engine. I beleive it is four pin connector. You will have to run one wire for that to the ECU.

3. Make sure all the grounds are reattached (I beleive all the little wires that are black with an orange stripe are ground). As well as the engine ground straps.

4. Need a BP ECU for an Automatic. The plugs are the same as the MX-3 SOHC automatic.

5. May need a four pin plug for the distributor, then have to run one wire to the ecu(just compare the two distributors - if they are the same then no problems )

STRONGLY SUGGEST U GET AN AUTOMATIC BP ENGINE HARNESS THEN IT WILL BE PLUG AND PLAY!!!!!


Check out the mx-3 4cycl fac for more info on the swap.

<small>[ October 18, 2004, 04:01 PM: Message edited by: Typhoonk ]</small>

[atlantamx3]

The SOHC auto tranny is made of spun sugar... good luck getting it to last very long. (Turst me, I just got rid of mine) I dont really see any problems with it bolting up to the block, But I seriously question its longevity.

If you do keep it-- I would HIGHLY suggest that you get an aftermarket Transmission Oil Cooler.

I would also suggest that you jit up a junkyard and pull the Engine wiring harness and ECU from an Auto Protege LX-- you will thank me later.

You will need a BP ECU either way though.

For wiring up the VICS if you keep your stock harness-- click HERE


Good Luck!

[quickshift]

meh, if i have to invest in a new harness, and if the auto tranny doesnt sound very promising with this setup, then i think ill pass. i thought it would be straight plug and play with this engine

whatever, the stock sohc suits my gf fine, and atx is the only option for her, because stop and go traffic is a common thing on her route to work and school