twentyhurtz

ok i did a obd1 jdm d15b swap into my brother's 96 civic ex (d16y8 orig motor) i have everything completed and i'm trying to crank the motor, and its turning over, getting spark but sounds like its not getting compression, i put my comp tester on it and in this cylinder order (4,3,2,1) i read 15,30,140,25. So first i'm kinda confused how i got compression on just one cylinder. before i put motor in i changed timing belt and tensioner. When i ordered belt i ordered it for d15z1 (sohc vtec 1.5 liter out of civic vx) like i'm supposed to, i even counted the t-belt teeth to make sure they were the same, i marked and replaced belt. ok so i went to check timing again this weekend on it, and timing was off about 4 teeth, so i adjusted it and still did not crank.
after turning it over a few times i hear poof from the intake! My friend who was helping me on it adjusted the valves on it to make sure they were not being held open. He suggests that maybe my timing is out 180 degrees.. i'm not really sure how this would be possible seeing as how my timing marks are dead on now. Also this could be an issue and maybe someone has insight on this- when i bought the d15b it did not have the plastic timing belt cover's, so we used the covers from the d16y8- maybe this was a mistake, does anyone know if they have the same pointers on them for the crank shaft pulley?
Any help is greatly appreciated!

System Lord

iTrader: (1)

Those compression readings do not look good, hopefully when you timed everything when you had the cam out, because cranking that crank pulley without the timing belt may have bent those valves. Try setting TDC on the CP. without the cam installed then reinstall the cam and hope for the best GL.

twentyhurtz

Yes i know compression isn't good, timed it with cam out? no.. all i did was removed old belt and replaced it, i had no reason to remove the cam??? and i didn't try to crank it without a belt because that would be dumb. I know how to do a timing belt job, my whole problem is that i'm not sure if the y8 plastics are working for the d15b engine as far as the pointer is concerned..

shogee

doesnt matter about the cover when you slap on a new belt crank pulley suppose to be at tdc with cam pulley at tdc, the problem is timing was off by 4 teeth and you cranked it and a poof was heard so im guessing you bent the intake or exaust valves because 1 and 4 are partner cylinders and both are low on compression, so to find out what is leaking do a cylinder leak test on 1 and 4 and listen for air leaks.

Jimster480

There should be a mark on the head that says up. Just make sure that that is UP and that the lines on the cam gear are both flat down like the head. Then put the bottom in TDC also. if you hear a poof from the intake it could be that the timing is completely off or that your spark plug wires are in the wrong order. Both of these things happened to me when my first swap was done.

twentyhurtz

i did do the belt change with cly 1 at tdc.. i was super careful when doing this process and i am this way about everything.. i put the plug wires on according to the same order as the d16y8 distributor order. plug wires are according to oem spec, timing is dead on according to markings on engine/head/cam gears/crank pulley, etc..

System Lord

iTrader: (1)

first off the above is correct and just curious how did you readjust the timing if it was four teeth off? if you rotated the CP. or cam gears clockwise without the timing belt on you bent the valves, if you counter clockwised it which would be the correct rotation without the belt on you may have bent those valves the proof is in the compression readings, sorry man not trying to sound like a dick. just source another head they're cheap for the d series in my area

Jimster480

what D15B did you put in the car? the OBD2 3 Stage VTEC one? Or a OBD1 D16Z6 like D15b? because if you put in a OBD1 one, then your plug wires are in the wrong order.

twentyhurtz

well this is not necessarily a head that is cheap and easy to find, this is a jdm d15b head, its like the type r of d series, when i first put the belt on i rotated the engine several times and it never lost time, the belt is pretty tight, however it lost time, jumped time, etc, not sure but it did. It's not necessarily the problem with fixing it, its that i just paid 700 for it from a guy and i'm trying to decide if it was messed up already or not, cause this is not my motor.. its not my car.. i'm just the one putting it in.. i don't wanna go fixing all kinds of stuff that was already messed up on a motor that was guaranteed to be good. but thanks for you advice.

Jimster480

I know what a D15B is thanks. D15B heads are the same as Z6 heads (OBD1), or cast like Y8 heads (OBD2) but with 3 stage VTEC (double VTEC solenoids on the mount).

twentyhurtz

ok enlighten me on the firing order, i know not to just trust anyone and i hear alot of things on this site that are misleading from misinformed people. and i "hear" that all d series firing order is the same.. why do you think its different, do you have a link or a site that says otherwise, or is it just that obd1 are diff firing than obd2? I don't have anyways to get a manual exclusive to the d15b, my closest comparison is the d15z1

Jimster480

The Firing order on a OBD1 will be the same as it is on a Z6. I dont remember it off the top of my head, but I know it is different, because I built a D16 and replaced my original Y8, and I put a Z6 head on the new built block, when I put the spark plug wires in the same order as they were on my Y8 I had the same problem as you. I thought they were all the same also, then my friend came over and was like "this is OBD1 its supposed to be like this", he changed a couple wires around and bam, started right up.
If you want ill go outside and get my order for you.

twentyhurtz

don't go out of your way, but heck if your just doing nothing and don't mind go for it, i don't have a eg manual, just the ek/dc2/crv manual.. thanks!

HondaPartsHero

All dseries have the same firing order

Evan125

the intake on my car popped once but it was only because my stupid brother tried pumping the throttle on a fuel injected car.

twentyhurtz

dang i didn't even think to ask my brother if he was playing with the throttle or not, i hate working on other peoples cars... mechanic's is not my calling, just a hobby...

Jimster480

mine is different than that.

Sr420Det

did u hold open the throttle when u where doing the compression test

twentyhurtz

hmmm... damn maybe not, it had been a while since i did a compression test and i don't remember if i told him to hold it open or not, i do remember pulling the fuse for ecu.. but i may have forgotten to tell him to hold throttle open.. i feel like an ***.. ha

Jimster480

even if you dont hold the throttle open it wont change the numbers that much. We just did a compression test about 2 weeks ago and we tested with the thottle open and closed, and the numbers barely varied at all.

System Lord

iTrader: (1)

true that, does not make a whole lot of difference btw make sure that dizzy is not 180 out either, but like i said those numbers on those cylinders do not look good for those valves.

twentyhurtz

yea someone told me make sure the dizzy is not 180 out, the dizzy on it came on the motor and i have never taken it off so i guess i will pull it, i just don't see how someone could put a dizzy one 180 out, because that slot or key on the shaft is slightly off centered, you would almost have to force it on, but hey i have seen people get it on backwards but not quite seated to the head before.. i will check it out..

twentyhurtz

and i did the compression test with the plugs out.. they tend to yield a higher compression ratio because of the drop in resistance and load on the starter.. i did my integra 2 months ago when i broke my timing belt and i read 240,250,250,240 across the board.. i'm expecting somewhere between 150-200 across the bored on my brothers engine..

Sr420Det

oh it will make a big difference, up to one hundred psi. but there still all over the place. Redo the compression test properly and let us know

Jimster480

idk man, it made no difference on the KA24 that we did it on.