RT4WD Z6 swap done blowed up.

So I got the motor out, w/o removing the trans. I dropped it and moved it a bit but got it out. During this process I realized that the trans indeed would have to come out to get the other motor back in. I doubt that I'll be able to align splines while trying to scrape the crank pulley down the side of the engine bay. I started to remove the trans and disconnected the pass. side axle and the 4, 10mm bolts that hold the drive shaft to the transfer case...success. Then came the shift linkage/cable weirdness. They don't seem solid, and I'm kind of afraid of pulling them off. Can I just remove the cotter pins and pop them off? I already have the fat part of the cable loosened and removed from the rear mount, just not sure how to approach the cables as they are mounted to the trans.

Any help is greatly appreciated.

-Jacob

Comments

  • rti intracrti intrac Senior Wagonist
    Just pop the split pins off and lift the cables off the gearbox. There are some bit nuts you will need to undo in order to free the cable from the trans
  • Thanks omw out to the garage now.
  • Ok. That part was pretty easy. New issue. When I turn it over it turns once or twice then thunks. Then every turn over is just a kachunk. I turned the crank pulley by hand with no problems. Smooth and no noise. I tried the a6 starter first, then the z6 starter. Both looked identical but had different :numbers. Same result with both. 91 rt4wd, 89-91 exedy clutch kit and light flywheel.

    Any ideas?
  • rti intracrti intrac Senior Wagonist
    Flat/tired battery? Do your lights go dimmer than usual when it thunks?
  • Not that I noticed. This sounds like something physical. Like the starter and flywheel aren't liking each other. Exedy lists the same part number for every d series flywheel though.
  • My car is at my Dad's garage so he is going to verify all the part numbers off the Exedy boxes to make sure I got the right clutch, pressure plate, and flywheel. The clutch is obviously correct because the transmission shaft went into the splines. I would assume that if the flywheel was wrong I wouldn't be able to spin everything smoothly by turning the crank via the crank pulley bolt, and if the pressure plate was wrong it probably wouldn't fit the flywheel.

    I've seen two starter types:

    664.jpg

    And this one, which is the one I have:

    665.jpg

    The Z6 and A6 starters (or at least the one that was in my car with the A6, and the one on the Z6 when I picked it up) look exactly the same, but do have different model numbers. I've tried both. Do I need the stubby one perhaps?
  • rti intracrti intrac Senior Wagonist
    maybe the amount of teeth on the starters are different? If it were incorrect it could be binding up?
  • Well, I figured it out.

    It had nothing to do with the battery or starter. It seems that there was a bit of water that got into the #1 cylinder. I didn't realize this because I had the plugs in the whole time. After taking out the plugs and cranking it manually I shot out some water and after that it was misting with each compression cycle. I found the culprit to be a loose intake manifold nut that allowed some of the coolant to (im assuming) enter the head and travel through the valves into the #1 chamber. This is all assumption.

    2-3-4 are all dry as a bone.

    Letting it dry out until Sat, then doing a bunch of oil changes. :(
  • Hopefully there wasn't enough to bend a rod.. dont know if it'd even be able to unless it was running when the water got into the cylinder. Not trying to worry you just stating a possiblity. Will be watching to see how it goes
  • I got her running! I dried it all out, the found out I had a bad ECU. Started her up and then drained the oil...nice and milky. Ran two quarts through the motor w/o it running to try and flush some out then put in a fresh 4qts. I went around the block and at low rpm's got an oil light so I parked her for the rest of the weekend. I'm going to look into how to flush your motor (there seem to be a variety of suggestions) and then get the code 1/14/41 sorted out.
  • how was your ecu bad? I'm planning to do a D16z6 swap in my wagon soonish. And did you have to account for wiring for Vtec?
  • Dont know if you already looked these up or not but,
    1 and 41 are for your oxygen sensor, either faulty or unplugged. 14 is IAC Valve (Idle Air Control) defective circuit or unplugged / defective sensor
  • I got the cheaper conversion Rywire harness (190ish) which included O2 sensor, Dizzy, Ecu, Vtec conversion harnesses and a set to hook to a switch to check codes. All plugged in great and I had no issues. I would suggest buying a basic tune, chipped ecu, or stock ecu from one of the vendors on h-t or ebay who deal solely with ecus. I got mine via a verified, 100%, 1550+ ebay vendor, but not strictly an ecu guy. He's covering 50% though when I ship it back to him which is cool.

    The 14/41 were fixed but I still had a #1.

    Those are all irrelevant though because the motor locked up due to oil starvation on it's test drive last night. It hasn't fully locked up but the oil light came on during a freeway run (was out prior to that after a full flush), and before I made it to the off ramp it had that dreaded metal on metal squealing sound. So I'm assuming the motor is shot, with perhaps some salvageable parts. There is a local z6 which has 16k since rebuild (with receipts) and I have seen it in the car and running. Picking that up and starting the whole swap over again. Should go quicker this time though...learned a lot on that swap.
  • Oh...the ECU had a blown cap. or it blew a cap when power was applied.

    IMG_20100903_193433.jpg

    IMG_20100904_125117.jpg
  • Those caps blowing is becoming a pretty common occurance. Hondata provides a new cap for that location with their S100/S300 kits now. If you're lucky, the circuit board survived with minimal damage. If you want, I can fix it for you for pretty cheap.
  • Yea, the C14 resistor blowing is a decently common thing. I chip ECU's and just got one from a friend that it was blown. Tried to fix it by putting in a new/better one with no success, it had melted the board and took a piece with it when removed. When I chip I put in this replacement capacitor in C14 every time to ensure this doesn't happen. The one from my buddy was done a while back my someone eles.
  • I've been hearing this is pretty common. I've got a couple microsoldering courses under my belt from my time in the military so I'm sure I could have a go at it, but the bottom of the board looked like it was in pretty bad shape and the Ebay guy said he would refund me 50% of the $130 I payed for it, and since I got a board local for cheap I just took that deal.
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