Rebuilding half an engine??
06-26-03, 08:05 AM
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Rebuilding half an engine??
Maybe this is a stupid question but, If you were to blow an apex seal and you know which rotor it's on can you just remove that single rotor housing and replace the apex seal w/out rebuilding the rest of the engine...?? If this is possible how much could it cost?
06-26-03, 08:29 AM
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You probabily could do this- but your still paying for removal and reinstal- so why not just make the whole engine new instead of replacing the other half in a year or two.
06-26-03, 08:59 AM
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You're better off rebuilding the whole engine. You could buy a whole rebuild kit for both rotors for $450 and if you're going to do it yourself like you said, it wouldn't cost you much at all. Go to http://www.atkinsrotary.com because they're the ones that sell the full rotor kit for less than anyone else because they make their own kits.
06-26-03, 09:40 AM
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6K miles when it blew 
. That engine is crap so why do you want to half a$$ it and only replace one apex seal? Rebuild it the right way or source a rebuilt from someone to drop in.
Who did you get the 6K mile engine from in the first place?
. That engine is crap so why do you want to half a$$ it and only replace one apex seal? Rebuild it the right way or source a rebuilt from someone to drop in. Who did you get the 6K mile engine from in the first place?
06-26-03, 10:15 AM
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Why would i have to rebuild the entire engine if the rest of it is fine...? It was put in by a mazda dealer and it ran perfect, the only reason it blew is because i upgraded a bunch of stuff and left the stock fuel system, it ran lean and blew. Im not planning on fixing the apex myself i want to take it to a shop and have it done.
Anyway so the possibilities of fixing just the one apex seal is possible, right?
Anyway so the possibilities of fixing just the one apex seal is possible, right?
06-26-03, 10:42 AM
#7
You need to rebuild the entire motor, not just half. Now that doesn't mean you have to replace the other rotor or Apex seals but you have to take everything apart, measure it, clean it, use new seals (o-rings) and should put in new springs and apex seals. Figure that the other rotor probably ran lean to and experienced detonation, the apex seal might not look damaged but it probably look a little fatigue life out of it, using it again is just asking for failure in the future.
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06-26-03, 10:46 AM
#8
you will probably need another housing and maybe rotor also. And your turbos could be damaged as well from blowing the apex seal.
Even if that stuff is ok (doubtful) you can't just replace 1 seal you would at least have to replace all 3 on that rotor.
What psi were you running and with what mods on what ecu? If you are so sure you ran lean why did you try whatever you did in the first place?
Even if that stuff is ok (doubtful) you can't just replace 1 seal you would at least have to replace all 3 on that rotor.
What psi were you running and with what mods on what ecu? If you are so sure you ran lean why did you try whatever you did in the first place?
06-26-03, 10:48 AM
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First of all, if you blew an apex seal, it could have damaged a number of things -- rotor housing, side housing, even your turbos.
Secondly, since you got a re-man, you really don't know how well the rest of the engine was rebuilt.
Third, the cost difference between going half-assed and doing it right isn't worth the hassle and time.
Finally, I remember when you joined and asked modding questions. Why didn't you listen to us? Have you planned on how to fix the cause of why you blew the engine yet?
Secondly, since you got a re-man, you really don't know how well the rest of the engine was rebuilt.
Third, the cost difference between going half-assed and doing it right isn't worth the hassle and time.
Finally, I remember when you joined and asked modding questions. Why didn't you listen to us? Have you planned on how to fix the cause of why you blew the engine yet?
06-26-03, 11:08 AM
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Tom:
If it's a reman with 6,000 miles on it why don't you have it warrantied??? From what I've been told they're usually pretty flexible on the expiration date.
My friend had 1/2 a motor rebuilt awhile ago and it's still running strong. He has broken a lot of motors over the years. His motive for doing it was (1) they all break anyway, why bother (2) the oem motors seem to last longer than any of the rebuilds.
Personally I'd rebuild the whole thing, because I don't think there is anyway for sure to determine what condition the seals are in.
If it's a reman with 6,000 miles on it why don't you have it warrantied??? From what I've been told they're usually pretty flexible on the expiration date.
My friend had 1/2 a motor rebuilt awhile ago and it's still running strong. He has broken a lot of motors over the years. His motive for doing it was (1) they all break anyway, why bother (2) the oem motors seem to last longer than any of the rebuilds.
Personally I'd rebuild the whole thing, because I don't think there is anyway for sure to determine what condition the seals are in.
06-26-03, 11:46 AM
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Heres what happened, its on another thread: https://www.rx7club.com/forum/showth...hreadid=196247
As far as planning for fixing my problem, yes i was going to install a fuel pump and 1300cc's but i ran out of money. And for the turbos I am sending them off to BNR for a parralel and stage 2 conversion.
As far as planning for fixing my problem, yes i was going to install a fuel pump and 1300cc's but i ran out of money. And for the turbos I am sending them off to BNR for a parralel and stage 2 conversion.
06-26-03, 04:54 PM
#13
tomaszjc7,
Ok, you knew better than to run the car the way it was before yet you did and blew a seal. Now you have everyone telling you that you should disassemble everything and you are ignoring them?
I'm not trying to put you down, but if you aren't going to do things the right way, why bother doing them at all?
Listen to turbojeff. Just because you disassemble the entire engine doesn't mean you have to replace everything. However, everything needs to be inspected to make sure no other damaged occurred.
Ok, you knew better than to run the car the way it was before yet you did and blew a seal. Now you have everyone telling you that you should disassemble everything and you are ignoring them?
I'm not trying to put you down, but if you aren't going to do things the right way, why bother doing them at all?
Listen to turbojeff. Just because you disassemble the entire engine doesn't mean you have to replace everything. However, everything needs to be inspected to make sure no other damaged occurred.
06-26-03, 05:18 PM
#14
Originally posted by Mahjik
tomaszjc7,
Ok, you knew better than to run the car the way it was before yet you did and blew a seal. Now you have everyone telling you that you should disassemble everything and you are ignoring them?
I'm not trying to put you down, but if you aren't going to do things the right way, why bother doing them at all?
tomaszjc7,
Ok, you knew better than to run the car the way it was before yet you did and blew a seal. Now you have everyone telling you that you should disassemble everything and you are ignoring them?
I'm not trying to put you down, but if you aren't going to do things the right way, why bother doing them at all?
Ask yourself if you have the $$ to re-rebuild your rebuilt motor again.
Bump it up all you want, your question should have been answered by all the good replies.
06-26-03, 07:19 PM
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Originally posted by turbojeff
You need to rebuild the entire motor, not just half. Now that doesn't mean you have to replace the other rotor or Apex seals but you have to take everything apart, measure it, clean it, use new seals (o-rings) and should put in new springs and apex seals. Figure that the other rotor probably ran lean to and experienced detonation, the apex seal might not look damaged but it probably look a little fatigue life out of it, using it again is just asking for failure in the future.
You need to rebuild the entire motor, not just half. Now that doesn't mean you have to replace the other rotor or Apex seals but you have to take everything apart, measure it, clean it, use new seals (o-rings) and should put in new springs and apex seals. Figure that the other rotor probably ran lean to and experienced detonation, the apex seal might not look damaged but it probably look a little fatigue life out of it, using it again is just asking for failure in the future.
Originally posted by turbojeff
Exactly. If you aren't going to do it right you'll probably do it over. Lesson learned on running lean right?
Ask yourself if you have the $$ to re-rebuild your rebuilt motor again.
Bump it up all you want, your question should have been answered by all the good replies.
Exactly. If you aren't going to do it right you'll probably do it over. Lesson learned on running lean right?
Ask yourself if you have the $$ to re-rebuild your rebuilt motor again.
Bump it up all you want, your question should have been answered by all the good replies.
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