caidek

Any help would be appreciated. I have a 87 TII and I bought a s5 TII jdm motor from myturbo88 here on rx7club. I asked for a 30day warranty on it and he obliged. After several delays in shipping it to me. It finally arrived at the end of September 09. He said it would not include the greddy throttle tube or the the fuel injectors.

Well....It was missing alot more than that. Turbo, exhaust manifold both gone, turbo lines all gone, fuel rails/pd's aswell. Some other misc stuff. One sensor was epoxied in! And no intercooler either.

He did give me a free power window switch, and said he'd leave the dual alternator pulley on....

Weeks later he sent me the intercooler, it arrived protruding out of the box and all bent out of shape (not just the fins!) and a s4 exhaust manifold.

After several rounds of ordering all the little stuff to piece together the missing stuff so I could atleast put my s4 manifolds on to make it work it had been about 2 months....


I finally got it running the first day of snowfall in MN. Now the real (@#$, it doesn't circulate coolant....

After bleeding the air out, it just keeps filling the overflow tank up, never draws any out of it.

The pressure builds up and it starts leaking out of the upper rad hose (new btw). New coolant sensor there and new one in the bottom of rad aswell. Never draws coolant out of the resevoir (new hose on the resevoir to top of radiator aswell. Radiator has been steam cleaned at a radiator shop (started pulling it when it was 20 degrees, then had to put it back in when it dropped to -5 so I could get it off the street for snow emergency plows.

You can all imagine how 'happy' I am about now. Sometimes I imagine how nice it would be to send this car over a cliff or into the mississippi. The old S4 TII motor only ran on 1 rotor, but atleast it cycled coolant correctly. Does anyone have any ideas on what could be wrong with this thing? When cold it won't idle, its hard to start. Takes a couple of minutes of cranking +breaks to cool the starter. I think my throttle cable is part of the surging while cold issue, I had a pipe bent for where the intercooler is placed so I could set the idle/ get it to run below 1100 so I could set the timing. Once its warm it'll run steady at 750-800 or so.

I do have a small tear in the turbo intake duct but its patched. I know that can contribute but it passes a smoke test on a uv smoke machine, hooked it up several different places. Can't find any vacuum leaks.

When revving to 2-3k and letting off it sounds kind of like its 'breathing', leaking from somewhere.

The two things I haven't tried is changing the water pump (doesn't seem to leak out of the housing at all) and the thermostat that came with the s5 motor. I got tired of contiually ordering parts at this point and it seems no mazda dealers in my area even stock a thermostat for rotary's. The thermostat must be opening, as once its warm it'll want to pour out the upper rad hose by the clamps. The warmer it gets the more it'll stream out around that area.

What could cause it to dump coolant in, but not pull it out of the resevoir?

caidek

I do feel bad about posting this publicly, but I just got done with another session of froze footin it outside in the 6 degree cold trying to figure this out. I've run two tanks of premix premium gas through this thing and I've driven it less than 110miles since putting the motor in. So much time bleeding coolant, running it, watching it carefully so it doesn't take a crap on me unexpectedly. My friend at a shop where we put it in is stumped, as are the other guys that work there.

myturbo88 seemed like a decent guy on the phone but after all this trouble and a couple grand down the toilet. I'm starting to think its all been for nothing and the coolant seals were toast from the start...

jjcobm

iTrader: (18)

myturbo88 is the worst seller on this forum, he sold me a transmission reverse switch, I trusted him and a few weeks later, I take it out of the box when I am ready to install it and it's broken (doesn't work at all)! I ordered on rear caliper from him and that was a rusted piece of SH*T. I gave him the benefit of the doubt, and he is always trying to push me to buy things everytime I post on the classifieds, I ignore him, I had left positive feedback for the items when I recieved them since I never installed them right away, I always waited a few weeks or month afterwards when I got time. When I got around to install them, they didn't work.... I PM'ed him and he seemed not to care... As a matter of fact, I will post up negative feedback now that you reminded me of him.

I really feel bad for you that you bought off of him....

Anyway, sorry to vent here but I saw that name and remembered how I felt when I found out how I got ripped off. Where in MN are you located? I might be close to you... Are you sure the coolant seals are in good shape? I'm sure those will cause pressure to go into the coolant system if they are bad, kind of like a bad head gasket.... Users with more engine building experience will chime in...

What is the compression like?

If you need a thermostat, get a STANT (the expensive one, not the cheap one) at advance auto parts.

caidek

I'm in the twin cities.

He sent me a pm with his phone # again, I lost it over the winter (thus the forum post).
I just got off the phone with him and he offered up a few ideas and asked me to take some pics of the engine bay/setup. I'm going to try a couple of things and get back to him.

He seems reasonable about this. I told him I don't care about the missing parts at this point, I just want a running motor that circulates coolant and doesn't pour on me. And like I said I do feel poorly to post this out on the forum for all to see. But flushing several grand down the toilet is worse....

I'll give advance a call tomorrow and try to pickup one, aswell as a new radiator cap. I'll borrow a pressure tester and test the rad also.

I may have gotten the filler cap and press cap mixed up putting things back together.

I no longer have a upper filler cap as I'm using a s5 front cover/thermostat housing with an s4 radiator.

I bleed the air out using a lisle yellow coolant funnel so the coolant is the highest point of the system and wait for the bubbles to leave that way. The coolant sensor that was in the thermostat neck is now in a piece of exhaust pipe thats been tapped/threaded for it. The new hose was cut in two and pipe clamped between.

The compression is good. All even sounding. He advertised 118psi across all 6. Just by turning it by hand you can hear it sounds very good. It's been painted black, probably in japan. I'm guessing it was apart for a rebuild at some point in the past.

I'm going to replace the bad fanclutch with a efan eventually. I've got a couple laying around somewhere, one from an old fb. In the mean time I found someone with another mechanical fan for cheap.

This is a pita, I even put Nokian snows on it in december...sucks not being able to drive it.

jjcobm

iTrader: (18)

Sounds good, at least he is working with you....

You will also need the o-ring seal for the thermostat, advance should have it, if not you can try autozone for that or any other local stores, but make sure you get the "superstat" stant, not the cheaper one. I wouldn't recommend getting any other brand besides O.E. mazda and the stant thermostat. I have had overheating issues with the others, so have other users.

I'm located south of you, so that rings out giving you a hand : )