LSX is ready to be dropped in tomorrow (PICS!)
09-15-2008, 01:37 AM
#681
when u get the heads off you should get them steam cleaned or thouroughly cleaned so you can see the bare metal in the combustion chambers and up into the runners a little bit... that way you can get a good view of whats goin on with the valve seats. if you have to, you can get the stock valves ground so they have a known good flat surface to seat to the valve seats in the heads. you can probably go to any high school auto shop and they should have the setup. its not hard to do at all.... takes about a day or 2 to get done. hope this helps.
but we are all rooting for ya. 
I'll take the heads off, see why they are leaking and go from there.
09-15-2008, 08:09 AM
#685
Easiest way to check to see if they are leaking once you have them off (just to confirm) is flip them over, and put a little water in the chamber with a spark plug in the head, and see where the water's going. That's gonna tell you right away where the problem is.
Hopefully it's just a valve job to fix the problem... one thing to remember though, if you do a valve job and end up using the valves you have, they're gonna be preloading the valvespring a little less, and they will probably need a little shim to get the seat pressure where it should be.
I've seen someone forget that once, that caused all kinds of valve float issues that took a while to figure out.
Hopefully it's just a valve job to fix the problem... one thing to remember though, if you do a valve job and end up using the valves you have, they're gonna be preloading the valvespring a little less, and they will probably need a little shim to get the seat pressure where it should be.
I've seen someone forget that once, that caused all kinds of valve float issues that took a while to figure out.
09-15-2008, 01:30 PM
#689
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Easiest way to check to see if they are leaking once you have them off (just to confirm) is flip them over, and put a little water in the chamber with a spark plug in the head, and see where the water's going. That's gonna tell you right away where the problem is.
Hopefully it's just a valve job to fix the problem... one thing to remember though, if you do a valve job and end up using the valves you have, they're gonna be preloading the valvespring a little less, and they will probably need a little shim to get the seat pressure where it should be.
I've seen someone forget that once, that caused all kinds of valve float issues that took a while to figure out.
Hopefully it's just a valve job to fix the problem... one thing to remember though, if you do a valve job and end up using the valves you have, they're gonna be preloading the valvespring a little less, and they will probably need a little shim to get the seat pressure where it should be.
I've seen someone forget that once, that caused all kinds of valve float issues that took a while to figure out.
09-15-2008, 02:59 PM
#691
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Also. Since your pushrods are out. That means the valves are all closed. Which in essence means you don't have to find TDC and then turn the engine 45 degrees for each cylinder after that. Just an FYI.... (means the process is easier)
09-15-2008, 03:06 PM
#692
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Would double checking your timing chain be easier than pulling heads? Or maybe check that when you get the blower off when or if you pull the heads. If your timing is off, that could possibly bend valves (if it is off by a lot). You'd probably hear the valves coming in contact with the pistons though it that was the case (clanking/clicking noise).
09-15-2008, 03:40 PM
#693
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Some of you guys are missing some facts. The timing chain is dot to dot, I clayed the pistons, no ptv problems. The bottom end is all new, never run, built by a great race engine builder. When doing the compression test with no push rods or rockers installed, rotating it by hand, I can feel it start to build compression and then hear it all hissing out the intake/exhaust valves. What reason is there to do a leak down? It seems pretty obvious that the used heads I got are ****. I just want to rip them off my car and hit the guy that sold them to me over the head with them. That's pretty shitty to sell bad parts, even more so such an important part. It's better I found it now rather than have them ******* up the engine and making no power and trouble shooting then. But that's why I just want to wait and get a good new set of 6 bolt heads. I don't want to go through this again. I still got the guys number that sold these to me, he actually works for gm. Once the heads are off I'm going to call him and see what he has to say about this. Imagine how much money I would of had to pay for all this labor if I wasn't doing my own work. It's bull ****.
09-15-2008, 08:29 PM
#695
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I tried doing a leak down but unfortunatly the compression checker I got has a check valve or something in the hose were it will only let the air flow one way. I thought I was getting compression when I hooked it up with 80 lbs of pressure and didn't hear any leaking. So I took it out of the head and then no air came out lol. I looked in the tube and there is a little thing like in a tires valve stem, if you push it then the air blows out. Anyway, it has to be leaking through the valves, where else could it be hissing out from? No matter where it's leaking, the heads have to come off so that's what I'm doing next. If I can get away with fixing them without spending much then I might still get the car finished, I'm just a little frustrated right now.
Just make sure you start with low pressure and then slowly raise it. If the piston is up, the pressure is going to push it down. You only need enough pressure to hear the air escaping. Listen at the exhaust outlet, and at the throttle body. If it's coming out either one you have just determined the source of the leak. If you only hear it out of the breather, dont worry about that cylinder unless you get ALOT of air passing out the breather.
I agree with alot of the other people who have chimed in saying to lap the valve. If they are not bent, this should do the trick... Worst case any debris in there could have pitted the seats... In this case, lapping the valves will not cure the problem.
Last time I bent some valves, I could see light around the seats when looking at the combustion chamber side of the valves with the heads completely assembled. The bad thing here is that if your compression numbers are that low with oil, you more than likely do have bent valves and its now time to start harrasing the person who sold you the heads.
Good luck man, DONT GIVE UP, these are issues that believe it or not are very common with a new setup. Especially when that setup involves used parts.
09-15-2008, 09:14 PM
#696
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Just one more for the: DON'T GIVE UP wagon.
I've been following your build since the begining and am flat out amazed at the fact that, with your admitted level of expertise, you embarked on such a build. That's not a chop either....that is a major PROP to you
You gotta be very proud of yourself for getting to this point and I think there are many members on here that would tell you the exact same thing. As several folks have said already, you are gonna have to put it together and take it apart many more times and that....that is what makes this a hobby.
Personally, I have had my project going for over 2 1/2 years. My motor has been under construction for 19 months (I know, I know) and it's finally ready. I have to drop it into the car, mock up the intercooler piping then, yank it all back out and take it to the dyno. Once it's tuned, load it back up, drive it back and put it all back in the car. Then....if everything is working properly, start the chassis dyno process. So I can identify with the amount of time you are and have been spending.
Basically, working on a high level build/project like this = P.I.T.A. But then, one day when it all comes together, it's gonna knock your socks off. Keep your chin up! I'd donate to your cause if I had any extra $$ myself but, like most everyone on here, I'm scraping pennies to do this stuff to. We should all have our heads examined for the amount of time and $$ we spend on our hobby. On a side note, my wife thinks it's hilarious about your girlfriend and her helping you out. She (my wife) has spent many nights watching TV or movies while I'm out in the shop creating or destroying something on the car so...hats off to your girl too.
So, with my unsolicited .02 almost complete, check this out:
PERFECTION
Perfection, for every one, it means something different, and that is its beauty.
The idea of what is perfection has been debated by the world’s most beautiful minds since Aristotle first attempted to define it.
Perfect is that which is true and complete. Perfect is that which is so good that nothing of the kind could be better. And perfect is that which has attained its purpose.
Humans, however, progress. Today’s most perfect violinist will someday be eclipsed by another. Another who will achieve musical bliss our minds simply cannot yet grasp.
At any time we may bear witness to perfection.
No individual, no leader, no organization is perfect. It is that “intent to achieve that ideal” which takes us one step closer to perfection. That is what makes it perfect. That is what makes it beautiful. That is what inspires.
We each have a dream. It’s our desire to be the best. On this day, at this time, for us, that’s perfect. And that’s the thing about life. It doesn’t matter what you’ve done before, it’s about what you do today.
Be inspired by the pursuit of perfection today. Whatever that means to you. Whether it’s to be better at your own job, to be a better friend, to be a better parent, strive for it..... and maybe others will too.
#################
Keep the faith, it will come together and your gonna have a "One of one" you can really be proud of.
Cheers Brother
Kev
I've been following your build since the begining and am flat out amazed at the fact that, with your admitted level of expertise, you embarked on such a build. That's not a chop either....that is a major PROP to you
You gotta be very proud of yourself for getting to this point and I think there are many members on here that would tell you the exact same thing. As several folks have said already, you are gonna have to put it together and take it apart many more times and that....that is what makes this a hobby.
Personally, I have had my project going for over 2 1/2 years. My motor has been under construction for 19 months (I know, I know) and it's finally ready. I have to drop it into the car, mock up the intercooler piping then, yank it all back out and take it to the dyno. Once it's tuned, load it back up, drive it back and put it all back in the car. Then....if everything is working properly, start the chassis dyno process. So I can identify with the amount of time you are and have been spending.
Basically, working on a high level build/project like this = P.I.T.A. But then, one day when it all comes together, it's gonna knock your socks off. Keep your chin up! I'd donate to your cause if I had any extra $$ myself but, like most everyone on here, I'm scraping pennies to do this stuff to. We should all have our heads examined for the amount of time and $$ we spend on our hobby. On a side note, my wife thinks it's hilarious about your girlfriend and her helping you out. She (my wife) has spent many nights watching TV or movies while I'm out in the shop creating or destroying something on the car so...hats off to your girl too.
So, with my unsolicited .02 almost complete, check this out:
PERFECTION
Perfection, for every one, it means something different, and that is its beauty.
The idea of what is perfection has been debated by the world’s most beautiful minds since Aristotle first attempted to define it.
Perfect is that which is true and complete. Perfect is that which is so good that nothing of the kind could be better. And perfect is that which has attained its purpose.
Humans, however, progress. Today’s most perfect violinist will someday be eclipsed by another. Another who will achieve musical bliss our minds simply cannot yet grasp.
At any time we may bear witness to perfection.
No individual, no leader, no organization is perfect. It is that “intent to achieve that ideal” which takes us one step closer to perfection. That is what makes it perfect. That is what makes it beautiful. That is what inspires.
We each have a dream. It’s our desire to be the best. On this day, at this time, for us, that’s perfect. And that’s the thing about life. It doesn’t matter what you’ve done before, it’s about what you do today.
Be inspired by the pursuit of perfection today. Whatever that means to you. Whether it’s to be better at your own job, to be a better friend, to be a better parent, strive for it..... and maybe others will too.
#################
Keep the faith, it will come together and your gonna have a "One of one" you can really be proud of.
Cheers Brother
Kev
Last edited by K9Kev; 09-15-2008 at 09:28 PM.
09-15-2008, 10:33 PM
#697
FormerVendor
Do a leakdown test. The leaking air noise you hear is likely going past the rings. They don't seal well on a cold engine that hasn't been ran in. Air goes by the rings, into the crankcase and out through the heads.
If you want to borrow our leakdown tester feel free to come by and grab it, but as others have said you could just remove the valve from your air line and put compressed air directly into the cylinder.
Also, you need to scan the car while you are cranking it so you can be sure everything is working correctly.
If you want to borrow our leakdown tester feel free to come by and grab it, but as others have said you could just remove the valve from your air line and put compressed air directly into the cylinder.
Also, you need to scan the car while you are cranking it so you can be sure everything is working correctly.
09-16-2008, 08:06 AM
#699
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Do a leakdown test. The leaking air noise you hear is likely going past the rings. They don't seal well on a cold engine that hasn't been ran in. Air goes by the rings, into the crankcase and out through the heads.
If you want to borrow our leakdown tester feel free to come by and grab it, but as others have said you could just remove the valve from your air line and put compressed air directly into the cylinder.
Also, you need to scan the car while you are cranking it so you can be sure everything is working correctly.
If you want to borrow our leakdown tester feel free to come by and grab it, but as others have said you could just remove the valve from your air line and put compressed air directly into the cylinder.
Also, you need to scan the car while you are cranking it so you can be sure everything is working correctly.
I can use my compressor to do the leak down but what exactly am I looking for once I have pressure going into thcylinder? Are you saying it might not be reading enough compression just because it's a new engine? Because if that's the case I would really like to not have to remove the heads. I can put in shorter pushrods and see if it starts. When I did the compression test with the 7.4 pushrods I got 0 compression, without the pushrods in it went up to 45 lbs. Maybe the pushrods were too long and hanging the valves open like originally thought. I just got into a big panic when I only got 30-45 lbs of pressure in the cylinders with the valves closed completely but if that's normal for a new engine, maybe I just need the shorter pushrods and need to let it run for a little to seal the rings?
Also, I did scan it, not while I was tryng to start it though, just with the ignition on and the only code it's throwing is p0107, Map sensor low signal, I think I need a new map sensor. I was getting spark and fuel while trying to start it but 0 compression.
09-16-2008, 08:26 AM
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Thanks for the inspiring words. I'm really trying to keep a positive attitude, it's hard when things don't go as planned. I'm not giving up, just trying to regain my composure lol. I'll get back in there and get it running, just not sure when and it's a little overwhelming when I have all you guys anxious for start up.
Of course my impatience is the worst part
Of course my impatience is the worst partJust one more for the: DON'T GIVE UP wagon.
I've been following your build since the begining and am flat out amazed at the fact that, with your admitted level of expertise, you embarked on such a build. That's not a chop either....that is a major PROP to you
You gotta be very proud of yourself for getting to this point and I think there are many members on here that would tell you the exact same thing. As several folks have said already, you are gonna have to put it together and take it apart many more times and that....that is what makes this a hobby.
Personally, I have had my project going for over 2 1/2 years. My motor has been under construction for 19 months (I know, I know) and it's finally ready. I have to drop it into the car, mock up the intercooler piping then, yank it all back out and take it to the dyno. Once it's tuned, load it back up, drive it back and put it all back in the car. Then....if everything is working properly, start the chassis dyno process. So I can identify with the amount of time you are and have been spending.
Basically, working on a high level build/project like this = P.I.T.A. But then, one day when it all comes together, it's gonna knock your socks off. Keep your chin up! I'd donate to your cause if I had any extra $$ myself but, like most everyone on here, I'm scraping pennies to do this stuff to. We should all have our heads examined for the amount of time and $$ we spend on our hobby. On a side note, my wife thinks it's hilarious about your girlfriend and her helping you out. She (my wife) has spent many nights watching TV or movies while I'm out in the shop creating or destroying something on the car so...hats off to your girl too.
So, with my unsolicited .02 almost complete, check this out:
PERFECTION
Perfection, for every one, it means something different, and that is its beauty.
The idea of what is perfection has been debated by the world’s most beautiful minds since Aristotle first attempted to define it.
Perfect is that which is true and complete. Perfect is that which is so good that nothing of the kind could be better. And perfect is that which has attained its purpose.
Humans, however, progress. Today’s most perfect violinist will someday be eclipsed by another. Another who will achieve musical bliss our minds simply cannot yet grasp.
At any time we may bear witness to perfection.
No individual, no leader, no organization is perfect. It is that “intent to achieve that ideal” which takes us one step closer to perfection. That is what makes it perfect. That is what makes it beautiful. That is what inspires.
We each have a dream. It’s our desire to be the best. On this day, at this time, for us, that’s perfect. And that’s the thing about life. It doesn’t matter what you’ve done before, it’s about what you do today.
Be inspired by the pursuit of perfection today. Whatever that means to you. Whether it’s to be better at your own job, to be a better friend, to be a better parent, strive for it..... and maybe others will too.
#################
Keep the faith, it will come together and your gonna have a "One of one" you can really be proud of.
Cheers Brother
Kev
I've been following your build since the begining and am flat out amazed at the fact that, with your admitted level of expertise, you embarked on such a build. That's not a chop either....that is a major PROP to you
You gotta be very proud of yourself for getting to this point and I think there are many members on here that would tell you the exact same thing. As several folks have said already, you are gonna have to put it together and take it apart many more times and that....that is what makes this a hobby.
Personally, I have had my project going for over 2 1/2 years. My motor has been under construction for 19 months (I know, I know) and it's finally ready. I have to drop it into the car, mock up the intercooler piping then, yank it all back out and take it to the dyno. Once it's tuned, load it back up, drive it back and put it all back in the car. Then....if everything is working properly, start the chassis dyno process. So I can identify with the amount of time you are and have been spending.
Basically, working on a high level build/project like this = P.I.T.A. But then, one day when it all comes together, it's gonna knock your socks off. Keep your chin up! I'd donate to your cause if I had any extra $$ myself but, like most everyone on here, I'm scraping pennies to do this stuff to. We should all have our heads examined for the amount of time and $$ we spend on our hobby. On a side note, my wife thinks it's hilarious about your girlfriend and her helping you out. She (my wife) has spent many nights watching TV or movies while I'm out in the shop creating or destroying something on the car so...hats off to your girl too.
So, with my unsolicited .02 almost complete, check this out:
PERFECTION
Perfection, for every one, it means something different, and that is its beauty.
The idea of what is perfection has been debated by the world’s most beautiful minds since Aristotle first attempted to define it.
Perfect is that which is true and complete. Perfect is that which is so good that nothing of the kind could be better. And perfect is that which has attained its purpose.
Humans, however, progress. Today’s most perfect violinist will someday be eclipsed by another. Another who will achieve musical bliss our minds simply cannot yet grasp.
At any time we may bear witness to perfection.
No individual, no leader, no organization is perfect. It is that “intent to achieve that ideal” which takes us one step closer to perfection. That is what makes it perfect. That is what makes it beautiful. That is what inspires.
We each have a dream. It’s our desire to be the best. On this day, at this time, for us, that’s perfect. And that’s the thing about life. It doesn’t matter what you’ve done before, it’s about what you do today.
Be inspired by the pursuit of perfection today. Whatever that means to you. Whether it’s to be better at your own job, to be a better friend, to be a better parent, strive for it..... and maybe others will too.
#################
Keep the faith, it will come together and your gonna have a "One of one" you can really be proud of.
Cheers Brother
Kev