gsc cams nightmare
Originally Posted by 2GDSM
Put it this way. if i installed the cams on your car, screwed up the timing so that the pistons and valves collided, then wanted to get away with it because my customer wouldnt know better, I'd switch the cams, install them correctly, run the car, and prove that it was likely the cams being ground wrong instead of me installing the cams correctly the first time. I can almost guarantee the cams are spot on as far as their ground, I would bet my entire lineup of cars that it was your low quality, scumbag installer.
In the second set of GSC we even took pictures and it was a cam problem, but for this one we need to make some measurements. we leave that to the experts. we will post later what happens.
Look guys, the purpose of the post was not to start a public rant, just to have a general idea of what could happen with a bad cam. I not blaming gsc per se, they do make good cams in general. One of our fastest evo's from our group is running gsc's and the car is a monster. I'm really not looking anyone to blame here, just wanted my car fixed and vent a little in the forum.
Truth is mechanical mistakes can happen, but to me it's just unlikely that a person with that kind of experience would make an elemental mistake, possible yes, but not likely. There's also little probabity that it was a bad cam, but it does happen. I really don't give a dam at this point, i just wan't my car fixed and my money back for the cams, no harm no foul. I'm positive i won't have any problems with evomoto or gsc, they are both awsome vendors and their customer service so far has been perfect.
Truth is mechanical mistakes can happen, but to me it's just unlikely that a person with that kind of experience would make an elemental mistake, possible yes, but not likely. There's also little probabity that it was a bad cam, but it does happen. I really don't give a dam at this point, i just wan't my car fixed and my money back for the cams, no harm no foul. I'm positive i won't have any problems with evomoto or gsc, they are both awsome vendors and their customer service so far has been perfect.
To me it would be more of a cam timing issue than a lift issue. If the valves are opening when they should be, there shouldn't be a piston there to collide with for the most part. I would think it would have to be a huge increase in lift and that would probably coil bind the valve spring before hittihng a piston if it is timed right. Not to mention if your installer is as good as you say he is why didn't he stop turning the motor when he felt everything bind up? That's just common sense.
I didn't look at the pics but, did it bend both intake and exhaust valves on those cylinders? If it did I would bet money it is the installer and not the cams. Like he missed time on the crank but, correctly timed the cams to one another. They make intake and exhaust cams at different times so ,the odds of getting messed up intake and exhaust cams as pair have got to be pretty slim.
If it only bent one side it could've been a bad cam or a wrong part. Compare them to your factory cams. Do the lobes look even close to being in the right positions?
I didn't look at the pics but, did it bend both intake and exhaust valves on those cylinders? If it did I would bet money it is the installer and not the cams. Like he missed time on the crank but, correctly timed the cams to one another. They make intake and exhaust cams at different times so ,the odds of getting messed up intake and exhaust cams as pair have got to be pretty slim.
If it only bent one side it could've been a bad cam or a wrong part. Compare them to your factory cams. Do the lobes look even close to being in the right positions?
At plain sight the lobes look normal, but still a minimal difference could be something that is naked to the human eye. The only valves that touched were the intake ones. There were no problems with the exhaust cam
Look, truth is that you very well might have gotten a cam that was "bad". However, chances are MUCH greater that it was not correctly indexed upon install.
I have personally installed many a Evo cam. I've had people drive in from out of state to have me install their cams based on my reputation (from the Texas border to Austin is a greater distance than across many states). Guess what? On very busy days I've not got my cam timing correct twice!!! There was no damage because I check, double check, and check it again. I turn the engine over by hand with a feather touch so many times it annoys some. I'm **** that way. My point is that I'm even admitting to making this mistake (I just happen to check my work and catch it), so how much experience your mechanic has is irrelevant. People are human, and s h i t happens.
At the same time, it would not surprise me if you find a manufacturing flaw, but to do what you say it did, the "naked eye" of your experienced mechanic should have seen something enough amiss to break out the calipers. Esp. if this mechanic has experienced parts out of spec from this same manufacturer before. I'm not busting you ***** for what you have done by throwing this out on the open forums before YOU know exactly what went wrong. I am busting your ***** if you have not taken the personal interest to mic, or have the parts mic'd in YOUR presents. With that out of the way, there is the possibility that they were not ground on the proper degree (even less likely). Then you would have better grounds for any accusations of manufacturing defects.
I have personally installed many a Evo cam. I've had people drive in from out of state to have me install their cams based on my reputation (from the Texas border to Austin is a greater distance than across many states). Guess what? On very busy days I've not got my cam timing correct twice!!! There was no damage because I check, double check, and check it again. I turn the engine over by hand with a feather touch so many times it annoys some. I'm **** that way. My point is that I'm even admitting to making this mistake (I just happen to check my work and catch it), so how much experience your mechanic has is irrelevant. People are human, and s h i t happens.
At the same time, it would not surprise me if you find a manufacturing flaw, but to do what you say it did, the "naked eye" of your experienced mechanic should have seen something enough amiss to break out the calipers. Esp. if this mechanic has experienced parts out of spec from this same manufacturer before. I'm not busting you ***** for what you have done by throwing this out on the open forums before YOU know exactly what went wrong. I am busting your ***** if you have not taken the personal interest to mic, or have the parts mic'd in YOUR presents. With that out of the way, there is the possibility that they were not ground on the proper degree (even less likely). Then you would have better grounds for any accusations of manufacturing defects.
Originally Posted by The_Predat0r
In the second set of GSC we even took pictures and it was a cam problem, but for this one we need to make some measurements. we leave that to the experts. we will post later what happens.
Wow this is a first of 250+ sets of cams that are all made one after the other on a CNC driven machine, in the same run with the same exact variables for each and ever cam, I find it next to impossible that one set of cams or even one cam was made incorrectly. This is a simple case of installer error. It sounds to me like the motor was not timed properly.
However, if you would like to send them back so we may check the duration, lift, recess of the cam we will be happy to do it for you.
Sorry about your luck on this and if we can help we will be more than willing to.
However, if you would like to send them back so we may check the duration, lift, recess of the cam we will be happy to do it for you.
Sorry about your luck on this and if we can help we will be more than willing to.
not sure if anyone said this or not but this is why anytime i do cams i always rotate the engine by hand a few revolutions to make sure nothing hits. i would say it was the installer who messed up but i guess it could have went both ways. make sure you exhaust all your options before forking over more money for the repairs. good luck and keep us updated.



