rebuilt engine wont start...help
 

i reused all irons and housings along with rotors and e-shaft
all new internals and bearings

i rebuilt and installed engine this weekend

had no luck starting it

did the compression test and didnt get any compression

rotor housings had some where on them as well as irons but nothing major - got pic...there is nothing grinding inside the engine so i don't think anything fell out of place

is it normal for rebuilt engine not to make compression

does it need break in period to make compression

here is the video of the engine pulsing without spark plugs

http://youtu.be/qJtqkvoVjO8

zero compression?

no it's not normal to not making any compression

you did something wrong with the rebuild.

Wait, u said u reuse all irons and housings along with rotors and e-shaft, what was the reason u rebuild ur engine again ? just for coolant seals ?

did u put oil or assembly lube around the housing? I assume u cleaned everything before rebuild ?

did u reuse all apex/side seals ? assume u did, did u mark the apex seal number to the rotor/slots and put them back to the same slot after rebuild ?

All seals are brand new apex and side seals solid corner seals ...

Only thing i re used are rotors and e shaft stationary gear in perfect condition new barind got presed in by atkins

I reused the housings and irons from two difrent engines just picked the best ones

I will post pic of the housings i used tonight

didn't i asked u in your other thread that, why would u want to use solid 1 piece corner seal for street use engines? Mazda used 2 piece for this reason alone.

no offense here but do you have any idea what were you doing? did u measure all used parts u had before u even use it? now u have a Frankenstein engine here and there making zero compression. u might need as simple as just a bit of oil to build compression, or u build a garbage engine with garbage parts in the first place.

list out all parts u have and use in the engine.

dump 2-cycle oil in the service ports (it probably wont suck it up if there isnt compression).....do this with ess disconnected...reconnect and crank.....if doesnt start push start it......if no SOL

good luck

he can just squeeze some oil into the spark plug hole , hand turn the engine, repeat to the other rotor.

if still no compression, he did something seriously wrong and he has to take it back out and re-do it (new housing I bet)

I was listening to ur video and I really can't hear the 3 pulse from a healthy engine. My engine when I turn it with my hand I can hear "PSSSH PSSSH PSSH" 3 times every time and it's fairly loud. yours not quite.

no that wasn't me

My question is did you even turn the engine over b4 you put it all back in??

My question is did you even turn the engine over as a short block b/4 you put it all back in??
Are you sure your getting fuel pressure? When i swapped my motor I had a little bit to much pre-mix and the engine would not start bc the fuel pump was clogged make sure your fuel pump is working properly. I would try pulling one of the fuel lines off and turn the key to the on posision but dont start it gas should come out of the line. i Cant remember what color the clip is their are 2 a blue and red but pull the one thats closest to the intake box . Also make sure you dont break or loose the clips because i do not think you can buy them without buying the fuel lines. At least thats what Mazda tells me.

i don't think i assembled the engine wrong....i did use a very small amount of oil on the housings
as there was some premix in the gas tank all ready will add some more oil and see if it starts...premix 200/1 from last year ,,was sitting in tank for about 6 months....

when i turned the engine by hand there was pulse on all 3 sides front and back and it was spiting oil out of spark plug holes... i even put my hand in front of it and good amount of air was blowing out...

maybe i spun it to much and pushed all oil out

yea i cleaned everything and when over the housing with some 1000 sandpaper


its just something to abuse at auto x and didn't wanna go all out on brand new housings or irons here are the pic of what i used


rear iron

center iron side A

ccenter iron side B

front iron


rotor housing a

rotor housing b

Its really important that you took measurement's of all the parts. Pix are not gonna cut it. I'm not sure that the rx-8 housing's can be sanded like you did you should have sent them out to have them lapsed.
"However with paper that fine I dont thank it would effect it but idk"
if you need any engine parts I have a complete engine tore down that im parting out for cheap and I know a guy that has a few engines forsale.

Mate, you are really asking for trouble using different used irons from different engines, even with new side seals, so you get brand new side seals running on different used irons, not good at all.

I know others will come in here and say, I used used irons and new side seals and it worked OK for me, well YOU were lucky, you should always get the irons machined, always, they will take it once, then the next rebuild brand new irons (side housings).

Edit..So you hand sanded the irons (face)...OMG...no..no...no.

Why did you not use RX-8 corner seals?

To me listening to your video, it runs on just that little too much at the end.

Yep, try squirting some light oil in the Spark Plug holes, you "might" be lucky and get 'a' temporary boost in compressions, and maybe even enough to fire it up.

Have you got Fuel Pressure?

Have you reset E Sensor and ECU?

i didn't know there was a problem with solid corner seals...they where more simple...less things to fall out during the assembly


as far as housing goes i sent pic to one of the shops as i did wanna resurface the housing,,,thing is it would have costed me more after shipping housing for resurfacing ...then just getting brand new ones...there is no rotary shops that are capable of doing this i my area

i was told by one of the shops rx8 housing are really thin and i should just go over them with some 60 sand paper just to brake surface glaze so i just took bit more time with 1000 then 600 and they looked nice... i didn't take pic of the build...they also told me they have seen a lot worse used




but could it be just something simple as solid corner seals....i would have expected Atkins to say something like they might give you trouble starting the car go OEM


so i will go reset everything and add some more oil...

holy shit, sandpaper? something to beat at autox and u are doing this shit?

didn't know? u think Mazda is stupid for using a 2 piece corner design?

you have absoluelty no idea wtf u are doing. and this is what you are getting.


i think im done here. there is no point to discuss this any further

sorry to say but your stupity amazes me

hey, it may be the key to longevity....lets all sand the chrome off our housings and follow up next year and see who is still driving

- first of all i didn't sand of chrome off the god damn rotor housings ....i sanded irons only

just like you would do it with clover compound

you need to chill out a bit man...

no reason for you get all menstrual...

might get hart attack there...

if i cared about the rx8 i would have spent the money for new housings...i just don't ... car is slow....it was more of a practice then anything else...for when i build all brand new engine for my FD....to find out what works and what dos not work...that's why i rebuild my rx8 engine instead of working om my FD...i know engine is assembled right everything is in place... all internals are moving the way they should.... now if i got to take it out and redo it with better housing...that's ok it will gives me more practice...

everyone need to start somewhere...

now i did add some oil and reset everything this morning car wants to start it started burning fuel and there was some smoke coming out the back... but i think its just flooded after that and there is way to much fuel on spark plugs right now and if feels like it needs more spark...will check coils might need some new spark plugs

yall give the fellow a break guys---come on he is just asking for help. He didnt build the engine for longetivity--he just built it to play with.
Everyone has their reasons......
Dude--maybe it is compression related. IDK for sure but it doesnt hurt to just inject some ATF into the spark plug holes ( for each rotor face) and then see if it will help crank it up.
Is it trying to crank at all?
You can take a regular engine compression gauge--hook it up and see if all compression pulses are equal--dont worry about the numbers as a regular compression tester really doesnt work well with our engine. Just see if the compression is equal on all faces.
The ATF may help tempriaily seal the rotors hopefully giving it enough to start.
If not then pull it off--gently.
You know to do all the usual stuff--checking spark/fuel etc. Make sure the coils are grounded, double check that the fuel injectors are plugged up right--its easy to get them mixed up.
Make double sure the omp is hooked up right and all vacuum lines are right. Maf is ok etc.
One piece seals will not seal as well--but it should still crank and run ok. Couple of guys have placed one piece ceramic seals in their builds.

oops beat me to the post. After reading that--yea you need new plugs with a fresh build--you can pull it off and that also helps, spins it a little faster.
There is a flood procedure--you probaly are aware of it already.

rx8 is slow?

on a track with long straight sure, that's not what it meant to be, but on autox it ate a lot of Porsche's and other fast cars out there.

well i guess I'm wasting my breathe,hope ur engine self destruct asap

Dude, did he do something to your sister? Chill.

Thanks ....

And i did get bits of useful info...

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