ham

Car: USDM 96 Civic HX D16Y5

First question: Can I put my d16y5 head / intake manifold combo onto another d series shortblock and throw it back in? i want to repair my lower end by just swapping it out with another and keep the HX setup. I dont want to go through the hassle of rebuilding or finding another specific d16y5. I heard the casting on the d16y5 and d16y8 heads are the same, but I want to make sure ill be ok with compression / valve locations on different pistons.

Second question: What is involved in swapping a different motor into an HX? It has the EGR and 2 o2s (one of them being 5 wire). How can I change under the hood wiring to accept maybe a JDM d15b or possibly a b series and not have any codes? (i would get the correct ECU for the motor i got)

The search is limited because I cant search for HX swap or any 2 letter word. TIA!

ham

bump

Syndacate

Please think about when you're bumping things.

You posted at 11p when most people are getting ready to go to bed and then bump at 7a where most people are either asleep or going to work.

- Give it some time - it'll get answered.

As far as your questions go...

I can't really think right now so I can't hit up your first Q

As for your second, there's wiring diagrams around for getting the 5 wires down to the 2 wires that a lot of the other engines use.

You won't need the cat O2 sensor since the JDM D15B is OBD-I the ECU won't look for a second O2 sensor. Same applies for B-series. If you go OBD-I it won't look for the secondary and you'll have to wire up the 5 to work as a 2 or replace it with a two, whatever, it's not really a complex procedure, and wiring diagrams are all over the place. If you buy an OBD-II B motor though I don't know anything about the secondary O2 sensor in regards to the VTEC-E of the HX so I'm not sure if that's a normal O2 sensor or not - so I can't help ya there.

Not much help, but it's a start.

ham

11pm eastern is 8pm pacific. i was thinking

thanks though. i noticed the post cat o2 is the standard 4 wire o2. maybe i just leave the pre cat and EGR unplugged and I can use a obd2 d series with the correct ECU?

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ham &raquo;</TD></TR><TR><TD CLASS="quote">11pm eastern is 8pm pacific. i was thinking

thanks though. i noticed the post cat o2 is the standard 4 wire o2. maybe i just leave the pre cat and EGR unplugged and I can use a obd2 d series with the correct ECU?</TD></TR></TABLE>

Oh?

You were thinking eh? So if you want to go time stamping that you were aiming to hit the Cali people up, 11pm being 8p pacific, so you bumped it at 4a pacific? Lots of pple on H-T then.



Anyway, it really depends on what OBD you get in terms of the secondary O2 sensor. Either way the wiring process from 5 wire to 2 isn't difficult from what I hear - although I've never done it personally. Lots of diagrams if you search for them.

EDIT:
If you use an OBD-II D series you're going to have to connect the secondary O2 sensor.

I'm not sure what's involved in that b/c I don't know if the secondary is a special O2 sensor (5 wire or something to that effect) a normal secondary O2 sensor that's on the rest of the OBD-II d-series.

ham

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Syndacate &raquo;</TD></TR><TR><TD CLASS="quote">
Lots of pple on H-T then.
</TD></TR></TABLE>

you are

So I think I want to keep the HX setup, I like the good gas mileage. I'm not trying to go for performance so I would like to get a new shortblock and put it back together like oem. so does anybody know what shortblocks are compatible with the d16y5? I think I can use pretty much any d series shortblock besdies the z1, but I would like to verify. Thanks.

suspendedHatch

Yeah any block except CX, VX because of their pistons.

The Y5 is a higher performance head than a Y8. You said you don't care about performance, but if you were to get an EX/Si tranny and keep your Y5 head, your HX would be faster than EX/Si's.

ham

nice! the d16y5 is rated at 115hp, but im assuming thats because of the restricted intake and tiny exhaust?

i could be faster while still getting 40mpg with my 12valve, sweet.

Bense

you can put the y5 head on any 96-00 block and it will bolt directly up.

you can put the y5 head on any 88-95 block but the d15s are gonna be tricky with the timing. If you use a d16a6 or d16z6 block, remove the oil jet on the d16a6, use your y5 crank pulley.

I believe you'll have problems with not having a knock sensor on the 88-95 blocks.

don't worry about piston to valve contact, at most you're going to see is like 11:1 with a d16a6 block, and even then that's not high enough compression to really worry about.

I would look for a d16y7 or d16y8 block. Use the k20 oil filters for increased oil pressure pwnage.

there aren't but two sensors on the block IIRC, so if you stay with the 96-00 you'll be good 2 go werd rad awesome neat superb okay see ya laterrrr

ham

thanks man... if i get a shortblock it will definitely be a 96-2000 block. my upper end is all still in good shape so i can reuse all of that.

even though im keeping the HX setup including the ECU for now, i would still like to know how to convert the engine harness for one 4-wire o2 sensor... i may do an obd1 b series swap later on.