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...

Good read is better than Facebook

Hook it up behind another car and tow start it .


If that wont get it started nothing will !!!!! Either the engine rebuild or the install is fubar.

You may find compression improves dramatically once you have had it running a few hours .

did my text on an internet forum offended you?

what I said was true, everything he did and said was wrong.

no one ask u to reply. Thx you for your concern.

he sandpaper his iron ...

he said rx8 is slow and use it for autox ... when I saw EvoX with over 400rwhp got beaten by a slow RX-8 in AutoX ...

he build a fubar engine, since the engine is so fubar it will underperform ... and he wants to use it for autox ... what an idiot.

While his method of rebuild may not have been what I would have done either, I'm not calling him an idiot and hoping his engine is fubar or blows up. You don't know:

1) If his irons are actually within the flatness and surface finish spec
2) If the housings are actually ok or not
3) Compression numbers

What if he's got great compression numbers? :)

It's easy to post insults and hope for more problems for others anonymously across the internet forums, isn't it?

You guys wield English the same way he rebuilds an engine ...

all i am saying there is no need to get worked up about it...this was my first rebuild and didn't wanna go all out on all new parts...more of a practice then anything

also i don't know why you are stuck on sanding the iron is wrong - what do you think happens to irons when you send them out to get resurfaced they take about off .001 from the iron surface by blanch grinding

i just broke the glaze on the irons to hold oil better i didn't even come close to taking any surface material of

engine did start building more compression in the rear rotor after i added some more oil 30psi
front still don't make compression

its probably do to rotor housing more then the irons

i took a gamble on reusing rotor housings when i know that they had ware on them along Apex Seal Tip travelling area fixable but didn't fell like sending them out and have them resurfaced..i think the tip is just not conforming to the housings or the glue i used didn't brake at this point

but that said i am just happy i assembled it right and everything is moving the way it should and there was no seal falling out or anything breaking...

i will take it apart and practices putting it back together few more times before i go on to build brand new engine ...i all ready have another Mazda re manufactured engine for the rx8 so its all good

and as far as understanding what rx8 is believe me ik i was just throwing a spark in some fuel
i respect s2000 for the same reason

but face it they are just slow....as good as them chassis are and the balance they are slow under powered cars

Mines not slow :dunno:

slow is defined by what environment you are driving in friend. Many of my friends have underestimated the RX* on a road course.

what happened OD, he calls the 8 slow and you loose the greatest signature on the forum :(

Civic Si must be the fastest shit on earth then ... VtEC y0 !

s2000 is better car then rx8 hands down...there is no if or but...there is no point in arguing that... unless you are small minded person and whatever you drive is the best thing out there...slower in the straight line s2000 is better cornering machine


and if you say rx8 is better,,, you are just ignorant

that said rx8 is not the best at anything but eating oil and braking down new engine dos not live up to older generation.. so its a peace of shit car

here is the pic off my rx7 engine bay ...so you can see few things your rx8 is lacking

http://rx7club.com/picture.php?album...ictureid=43760

My RX-8 has all of that. S2000's are nice, hardly faster than an RX-8, but still nice.

you did not just call the s2000 nice :(...9k

heh

Yes, I can dig it :)

http://posturesittingright.files.wor...20_gold_01.jpg

^it looks like its broken :lol:...it looks as bad as the old Z3

You just hatin' dog!

How about this one?

http://www.forgestar.com/blog/pics/ws20001.jpg

that one is "ok" (best one yet) I am just not into it...never have been

so ... last I know s2k is a 2 seater that has a shorter wheel base and lighter, but it can barely outrun a rx8 which is slow in ur book.

better cornering machine? reviews speak otherwise.even when rx8 is heavier and it does not have rear double wishbone like the fd.

do u actually know that means?


hah, i guess a lot of people are ignorant then, except an idiot like u of course.

u post a pic of fd and u said rx8 eating oil and breaking down????

and name one fd has gone thru 200k without a rebuild. i know rx8 did it, often.

PEACE of shit car and u drive it ... ur logic fails more than ur sandpaper bullshit ... thx to morons like u who can't rebuild for shit and fuck things up, when u finally fuck it up bad enough u sell it to the next guy, yeah, now i know why rotary has such bad name. deep shit

S2000's are great cars, Rx7's are great cars. But, when is it fair to compare a 2 seater with a 4 seater and yes the RX8 can carry four people with some comfort?
Just think of the 8 for what it is and do the same for the others.
The 8 is NOT a POS car. Some people may not known how to appreciate and develope it, but some do. Funny I dont see the S2000 chassis being raced in Grand Am? I dont see many rotary powered 3nd gen Rx7's being raced. yes a fair amount of them are there for track days but not actually racing. I see a number of RX8's out there and they are winning or placing in their class.
I tell you what, bring you little Rx7 to georgia and we will get on Road Atlanta together. We will get the cars to an equal power to weight ratio and lets see what will happen.

u are right genius, rx8 does not have a Turbo! how about this, take ur Turbo out and see what happens?

wrong.

they have something called vtec, when it kicks in, it smokes every frickin` thing on the planet. it does not matter if rx8 track time is faster on some course or whatever, s2k is just faster and rx8 is such a PEACE of shit. get it?

Was the S2000 still available new in 2008 and 2009?...yes it was.

Funny how it did not make either of these Motor Trend's....TOP 3....or top 10.

America's BEST HANDLING car...RX-8 came in 3rd..
http://www.motortrend.com/features/p..._8_bmw_m3.html

Or America's Best Drivers car...MX-5/Miata came in 3rd.
http://www.motortrend.com/features/p...x_5_miata.html

So, shut up or I will delete you...;)

I love this forum!