Hurt the 13B, but what is the diagnosis?

[jackaleks]

there\'s a half-bridge short block in the for sale section, would be the easiest solution: http://www.mazdarotaryclub.com/forums/showthread.php?t=64391
 
swap it in, take the old block out and strip it to see exactly what went wrong, sell all the good bits off. you could make a fair chunk of the outlay for the new block back if you can sell some good plates/housings/rotors.

[StavFC]

Jack- Good call and well spotted, thanks

[ad4m1]

Just so you know that is an Fd block. Fc block mounts differently and possibly has different lower intake

[StavFC]

Didnt know FD blocks mounted different to FCs? Anyone got any links/details on this?
 
Know the inlets different, but thats no big deal.

[ad4m1]

Fc mounts off side of centreplate. Fd off bottom of rear plate. Also I think fc housings have 2 water ways in the side into inlet? Or something like that

[Prof]

Fc mounts off side of centreplate. Fd off bottom of rear plate. Also I think fc housings have 2 water ways in the side into inlet? Or something like that

The water routing in the manifold is different - but Stav had an aftermarket turbo on his anyway - not sure if it\'s water cooled.
 
The rotor housings have the same water outlets - it\'s just where they end up from the manifold routing.
 
The engine mounts are going to be the problem though - FD\'s mount up on the rear iron, FC\'s on the centre iron.  Having said that, I\'m not sure if you could fit the manifolds and engine mounts, and sump from an FC (the drivers side mount bolts into part of the sump).  Then you\'ve got the problem with the pulleys and all the rest of it at the front being different.

[StavFC]

Ok, so maybe that engine isnt a brilliant idea, cheers for the info.
 
Ive just spoke to a mate who can build rotarys, he\'s pretty much convinced me to do it myself, with his guidance of course.
I can build piston engines well enough, but never touched the insides of a rotary.
I\'d like to learn how, and deffo prefer having nobody to blame but myself for things going wrong (i mean, im NOT AT ALL ....ed that my engines blown, as what went wrong I did, but if someone else had done these increased power mods and blew it up id be livid), so may end up going this route.
 
And im sure you\'d all be happier than if I put a V8 or a Cossie YB in it, lol.

[Prof]

Did wonder if you might go down that route with it (the boinger route), but the DIY rebuild is a good learner.  Gives you a real appreciation for how the things put together.  It need not be overly expensive - but from my own recent experience :
 

• Get the rebuild DVD\'s and watch them - they are a bit slow paced - but give a lot of visual and measurement info.
• Get a copy of the FC Field Service Manuals on PDF
• Ask loads of questions
• Lock yourself away for the final engine assembly time so you don\'t get interrupted.

You\'ll find the prep work labour intensive, and checking everything is in tolerance is a pain - but worth doing if you want a running engine at the end of it.  I can see why the engine builders charge the monies they do.
 
Good luck with it - which ever route you take.

[Nik da Greek]

Heard the other day that you\'d blown it up. I\'d reiterate what Blitz said really, whatever has gone before I\'m sorry to hear of any rotary runner blowing their engine. Worth bearing in mind in your rebuild plans that if it\'s broken an apex seal (which sounds inevitable really given the symptoms) in addition to housing and rotor damage it may well have wnakered the turbo hotwheel and housing too, depending on how big a lump of tip it spat out.

Hope you can get it sorted and resurrected for sensible cash, that car deserves to live again really

[Rex_FTW]

Yup it deserves to live again... And with a rotary

good on you for rebuilding it

[StavFC]

Heard the other day that you\'d blown it up.

Never ceases to amaze me how people ive never met and have no idea how they know me but have some bizzare irrational internet hatred for me hear about my life.
Can imagine all the whoops of joy as the rumour spreads around the internet haters, lol.
 
It will live again, most likely with a rotary as it looks the best current option.
TBH its not the rotary that makes it quick as it is (the lightness did that, its a basic low power engine), or handle like it does, or look like it does, or any of the attributes I like, so I wouldnt lose any sleep if it wasnt one anymore, in fact in a lot of respects id like it not to be.
But as said, it currently looks to be the best VFM option so it probably will be the spinning wheels of unreliability once again, lol.

[Nik da Greek]

Never ceases to amaze me how people ive never met and have no idea how they know me but have some bizzare irrational internet hatred for me hear about my life.
Can imagine all the whoops of joy as the rumour spreads around the internet haters, lol.

Well, I think you maybe overestimate your relevance and importance to most people\'s everyday lives here tbh :rolleyes:. If this was the case I\'d have expected to see a few more "Stav\'s blown his FC up hahaha isn\'t it funny" threads appear three days ago, but since the silence was fairly deafening, I think you can conclude most people don\'t give a fduk

It will live again, most likely with a rotary as it looks the best current option.
TBH its not the rotary that makes it quick as it is (the lightness did that, its a basic low power engine), or handle like it does, or look like it does, or any of the attributes I like, so I wouldnt lose any sleep if it wasnt one anymore, in fact in a lot of respects id like it not to be.
But as said, it currently looks to be the best VFM option so it probably will be the spinning wheels of unreliability once again, lol.

Glad to hear it\'ll still be rotary, and well done for phrasing it in such sympathetic terms on what is after all a rotary forum.

[iaint]

Probably blown/chipped a tip - the higher the rpms, the more centrifugal force the seals have the better they seal.

If it sounds like a tractor on idle, you have probably blow the rear rotor, get a proper compression test done by mazda.

As you have kept driving the car it would have trashed the rotor, housing and probably both plates now....

This is it basically.

Did the same on the runway at Bruntingthorpe - didn\'t even realise until I pulled into the pit area and it idled like a tractor.

Chipped a tip in my case.

[StavFC]

If all goes well I\'ll have a spare FC 13B soon that may have some useful bits, and can get on with the rebuild, and learning how too. Granted I can do piston engines, but despite having less parts, a rotary ive never touched so far less confident. But im quite looking forward to learning!
Be interested to see the port sizes and shapes actually, as I dont know what it is barring its ported.
 
Power wise I need at least the same if not more to keep me happy (ideally far more TBH), but not totally sure what im going to do there, as I like the response at the moment (not fusssed about low down power, it lives on the rev limiter but the throttle response once in the boost threshhold I mean) so dont want to lose that as its main use is drift/sprint/track rather than straight line stuff.
 
We will see how things go.
 
Appreciate the advice though, glad everyone agrees the way its likely to be dead, gives me something to work from :Thumbsup!
 

I think you maybe overestimate your relevance

You the one who said \'I heard you\'d blown it up\' like someone had told you, despite not knowing me or anything about me, so...
I dont have people coming up to me and telling me about the car issues of people I dont know and have no interest about, lol...
Either way, good stuff crapping up another thread of mine with your internet hero skillz :god

[Nik da Greek]

You\'re welcome :WaveBye