Just tried to fire up my freshly rebuilt engine
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Just tried to fire up my freshly rebuilt engine
Quick little background, FD with a TD06 turbo kit. Had approx. 10,000km on it and was sold to someone that didn't know any better. Driving the car, this person decided to see what kind of performance it had not knowing that a vacuum line came off the wastegate. Long story short, lots of boost and engine go boom.
Well, I had bought the car and decided to redo the engine. Had to replace both housings and one rotor. I also had it full bridgeported. Reassembled and tried to get it running today. It started... once... and it became very hard to start after that. Now when I'm cranking it, I get this compression sound back through the intake, when I do get it running, it won't idle and sounds like complete ***. I was wondering what that sound could be??? Could that be the reason why it won't start? I'm also getting alot of black smoke from the exhaust. I'm running stock injector until after I get the engine broke in and a Power FC.
Any thoughts?
Well, I had bought the car and decided to redo the engine. Had to replace both housings and one rotor. I also had it full bridgeported. Reassembled and tried to get it running today. It started... once... and it became very hard to start after that. Now when I'm cranking it, I get this compression sound back through the intake, when I do get it running, it won't idle and sounds like complete ***. I was wondering what that sound could be??? Could that be the reason why it won't start? I'm also getting alot of black smoke from the exhaust. I'm running stock injector until after I get the engine broke in and a Power FC.
Any thoughts?
#2
Fresh motor sounds like no compresson add 1/8 cup of oil down leading plugs also if it starts dont let it idle rev it to 3000 for 1 min or so until everthing seats keep an eye on temp guage give that a whirl let me know how it goes
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sorry, i guess i said that wrong. it is stock injectors coupled with a Power FC. not a stock ECU.
yeah, i'm thinking it is a leaky or stuck APEX seal. not sure why it would be stuck, but for trying to get it to run, two sides leaking on the compression "stroke" side would make it run like A$$. i thought about it all night and that is the only thing i can come up with. at first, i thought it just a poor port job, but then it would do it all the time, and not on certain compression stages. well, i'll know soon enough, but it might be a week or two before i know for sure.
thanks for all the inputs. i'll let you know how it turns out.
yeah, i'm thinking it is a leaky or stuck APEX seal. not sure why it would be stuck, but for trying to get it to run, two sides leaking on the compression "stroke" side would make it run like A$$. i thought about it all night and that is the only thing i can come up with. at first, i thought it just a poor port job, but then it would do it all the time, and not on certain compression stages. well, i'll know soon enough, but it might be a week or two before i know for sure.
thanks for all the inputs. i'll let you know how it turns out.
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anyway, here is what i did: i had/have the problem narrowed down to the rear rotor. it takes a couple cranks before you can start hearing the noise come back through the intake. i pulled the engine out, removed the rear plate and made sure everything was in it's place and all is well. reassembled the engine and i can crank it over by hand and the noise comes back. while on the stand, i further narrowed it down to the exact seal that it is coming from. but when you rotate the rotors around, i can go through the exhaust port and see that i have plenty of spring pressure on all the seals. with my LIM off, (remember full bridgeport) i can inspect the side seals along with the corner seals and see that they have enough spring pressure. so i'm stumped.
this rotor is used and it came from someone online. now is it possible that a rotor can be "warped or twisted" in that specific area causing my problems? or how about the apex seals. i got these from Atkins rotary and i really liked the design of them. they are the two piece but the nice part is, they didn't have to be glued on the initial installation. installation was a piece of cake.
if anyone knows of or experienced this, please let me know what's up. i'm about fed up with it and ready to go and buy another used engine just to get the car running. any inputs would be very helpful.
-Steve
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#8
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Did you check the clearance on the sides of the seal and the corner seal? I had an issue where there wasn't enough clearance and the seal could not move freely. I've also seen rotors get slightly damaged where the corner gets slightly bent in. It doesn't cause the corner seal to have a problem but it can cause the apex seal to get pinched and not have free movement.
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Did you check the clearance on the sides of the seal and the corner seal? I had an issue where there wasn't enough clearance and the seal could not move freely. I've also seen rotors get slightly damaged where the corner gets slightly bent in. It doesn't cause the corner seal to have a problem but it can cause the apex seal to get pinched and not have free movement.
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Well, i think i found it
i just tore down my engine for a third time and here is what i found:
the rear rotor i used was the one that i bought online from some dude. upon today's inspection, i noticed a fairly good sized gap next to the apex seal. i am guessing that this rotor was originally used in the #1 position and spun the other direction cause the area where the apex seal goes was shaped like a "V". not all the way across, just where all the seals meet up. a feeler gauge inspection went up to .008 inch between the apex seal and the rotor, so i figure that is probably where my issue is. i guess that teaches me to double check used parts.... hehe...
so, needless to say, i'll be searching for a "servicable" FD C-weight rotor.
the rear rotor i used was the one that i bought online from some dude. upon today's inspection, i noticed a fairly good sized gap next to the apex seal. i am guessing that this rotor was originally used in the #1 position and spun the other direction cause the area where the apex seal goes was shaped like a "V". not all the way across, just where all the seals meet up. a feeler gauge inspection went up to .008 inch between the apex seal and the rotor, so i figure that is probably where my issue is. i guess that teaches me to double check used parts.... hehe...
so, needless to say, i'll be searching for a "servicable" FD C-weight rotor.
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yeah, but this is diffinately a compression noise coming from the rear. not all the time, so i figured it wasn't the port job. when cranking the engine, it would sound similar to a piston engine with a valve not seating.
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i just tore down my engine for a third time and here is what i found:
A feeler gauge inspection went up to .008 inch between the apex seal and the rotor, so i figure that is probably where my issue is. i guess that teaches me to double check used parts.... hehe...
so, needless to say, i'll be searching for a "servicable" FD C-weight rotor.
A feeler gauge inspection went up to .008 inch between the apex seal and the rotor, so i figure that is probably where my issue is. i guess that teaches me to double check used parts.... hehe...
so, needless to say, i'll be searching for a "servicable" FD C-weight rotor.
Always inspect your parts while assembling. Cant always trust others from other states. This is why i prefer waiting till local deals come around. Saves a lot of headaches.
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Hey bro,
Just got your message on facebook (I know I dont check it enough lol), and read your thread. Ill be rebuilding my engine soon, If I have a space "C" weight or suitable weighted rotor, Ill sell it to you. Let me know if you have found a solution by then. Also he is not running stock injectors as well, hard to tell since Japanese tune these things alot more differently than we do, but definately not stock.
Just got your message on facebook (I know I dont check it enough lol), and read your thread. Ill be rebuilding my engine soon, If I have a space "C" weight or suitable weighted rotor, Ill sell it to you. Let me know if you have found a solution by then. Also he is not running stock injectors as well, hard to tell since Japanese tune these things alot more differently than we do, but definately not stock.
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Hey bro,
Just got your message on facebook (I know I dont check it enough lol), and read your thread. Ill be rebuilding my engine soon, If I have a space "C" weight or suitable weighted rotor, Ill sell it to you. Let me know if you have found a solution by then. Also he is not running stock injectors as well, hard to tell since Japanese tune these things alot more differently than we do, but definately not stock.
Just got your message on facebook (I know I dont check it enough lol), and read your thread. Ill be rebuilding my engine soon, If I have a space "C" weight or suitable weighted rotor, Ill sell it to you. Let me know if you have found a solution by then. Also he is not running stock injectors as well, hard to tell since Japanese tune these things alot more differently than we do, but definately not stock.
right now, i'm just too lazy to even mess with it. it's cold and it has got me disgusted. oh well... i'll figure something out.
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Well, some good news. I finally ripped it completely down, inspected, double, triple and multiple checked everything. I went ahead and installed some Mazda apex and 2 piece corner seals. Reassembled the engine and it is now running.
http://www.youtube.com/watch?v=LHQEZap8flM
Now here is what I'm having. I have reset the PFC, entered in my injector sizes (850/1300) and let it run to try and learn. At first, it ran extremely rich, so i cut down the duty cycle to the point where it runs without killing itself and me in the process. It seems to be doing ok to the point where the idle is very irratic. (not the brap brap) monitoring the injector duty cycle, it will go from 5 or more ms (idle up) to 0.0 (idle down), constantly. i've read around and see that people have different settings for their setup, but right now, i just want it to run without the worries of detonating it. i will be driving it for 1000km and switching over to a bigger turbo and getting it tuned.
i guess what i need to know is, what is a good safe setting for injectors and timing so that i can safely drive it. if anyone has an idea or good information for me, please let me know. thanks and i appreciate the help.
-Steve
http://www.youtube.com/watch?v=LHQEZap8flM
Now here is what I'm having. I have reset the PFC, entered in my injector sizes (850/1300) and let it run to try and learn. At first, it ran extremely rich, so i cut down the duty cycle to the point where it runs without killing itself and me in the process. It seems to be doing ok to the point where the idle is very irratic. (not the brap brap) monitoring the injector duty cycle, it will go from 5 or more ms (idle up) to 0.0 (idle down), constantly. i've read around and see that people have different settings for their setup, but right now, i just want it to run without the worries of detonating it. i will be driving it for 1000km and switching over to a bigger turbo and getting it tuned.
i guess what i need to know is, what is a good safe setting for injectors and timing so that i can safely drive it. if anyone has an idea or good information for me, please let me know. thanks and i appreciate the help.
-Steve