LG guys need clarification here ???
Thread Starter
Instructor
Joined: Oct 2008
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LG guys need clarification here ???
i bought G6X3 from you a month ago, i had the whole kit before cuz i used to have G6XE cam. what happened is that the engine jammed and when we opened the head we found out that the valve is broken and the piston has cracked. from the mechanical analysis is that the cam lifitng was so high that the clearance btw the P and V wasn't enough. i asked you guys if i need any modification while installing this cam and you replied with no, do you have any clarification on that?? is it possible that you have sent me a wrong cam?
cuz there is no other possibility to make this problem occures in the engine, i really like to deal with you guys and you are pro in your field but i need explination in this thing cuz this problem is costing me so much $$$$ ??
Thanks
cuz there is no other possibility to make this problem occures in the engine, i really like to deal with you guys and you are pro in your field but i need explination in this thing cuz this problem is costing me so much $$$$ ??
Thanks
Last edited by LS3_08; Dec 7, 2009 at 06:26 AM.
Safety Car
Joined: Sep 2007
Posts: 3,502
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Didn't you have a problem with the car being down on power after the cam install before the outright failure occured? I could think of one reason off the top of my head for the two events being related...missing the timing mark alignment during the install process could get you there. That is one possible explanation.
Safety Car
Joined: Aug 2004
Posts: 4,067
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From: Houston Texas
That is terrible! A lot of guys on this forum are running that exact cam and I have never heard of such and issue, did you mill the heads or smaller HG? I would like to know for myself too because I plan to go the same route.
Are they sure that one of the valves did not simply break?
You can have the cam measured to get the exact measurements to determine if that was or wasn't the problem. Keep us informed and good luck.
Are they sure that one of the valves did not simply break?
You can have the cam measured to get the exact measurements to determine if that was or wasn't the problem. Keep us informed and good luck.
Former Vendor
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From: Lewisville TX
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Call or email us directly and we can be of more assistance.
With that being said the G6X3 will work WITHOUT having to worry about piston to valve as long as the heads are stock, the gaskets are stock, and stock rocker arm ratio's are being used. This goes without saying that the cam needs to be aligned correctly.
You should have no probably going from an XE to and X3. All other items are going to be the same in the kit from springs, to pushrods, to the timing chain.
All of our cams should have the markings cut into the back of the cam as to what it is.
With that being said the G6X3 will work WITHOUT having to worry about piston to valve as long as the heads are stock, the gaskets are stock, and stock rocker arm ratio's are being used. This goes without saying that the cam needs to be aligned correctly.
You should have no probably going from an XE to and X3. All other items are going to be the same in the kit from springs, to pushrods, to the timing chain.
All of our cams should have the markings cut into the back of the cam as to what it is.
Former Vendor
Joined: Oct 2007
Posts: 2,032
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From: longview tx
all cams have markings telling you what they are, im Sure they can tell you by that. as for the PTV clearance. you ALWAYS have to check this no matter what. but if they have used the cam, and many others have without issues than you should have been fine. Are you not stock? stock heads? gaskets? are you 100% sure the dots are lined up properly? The Teeth being one off will do this on a bigger cam for sure! there is alot of things that go into making sure everything is right. But with that said if they said there cam would clear, then you should have been fine, so there has to be another factor..
Last edited by East Tx Muscle Cars; Dec 7, 2009 at 03:36 PM.
Thread Starter
Instructor
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before i do anything, i always inform the supplier with my setup. about the other questions, i the gasket stock, head stock. the car was dynod with no issue or knocking drove for an hr after dyno on 60 KM and suddenly the engine jammed ( i think if the cam installation was wrong it would cause the problem in earlier time).
Tom the mechanical is opening the engine for block checking. i will check the cam but can you guys in lg tell me what do i have to check to be sure that the cam i have now is the G6X3 ? i would take pic's for forum members so everything would be clear
Tom the mechanical is opening the engine for block checking. i will check the cam but can you guys in lg tell me what do i have to check to be sure that the cam i have now is the G6X3 ? i would take pic's for forum members so everything would be clear
Last edited by LS3_08; Dec 7, 2009 at 04:29 PM.
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Former Vendor
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From: Dallas Texas
Former Vendor
Joined: Oct 2007
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From: longview tx
before i do anything, i always inform the supplier with my setup. about the other questions, i the gasket stock, head stock. the car was dynod with no issue or knocking drove for an hr after dyno on 60 KM and suddenly the engine jammed ( i think if the cam installation was wrong it would cause the problem in earlier time).
Tom the mechanical is opening the engine for block checking. i will check the cam but can you guys in lg tell me what do i have to check to be sure that the cam i have now is the G6X3 ? i would take pic's for forum members so everything would be clear
Tom the mechanical is opening the engine for block checking. i will check the cam but can you guys in lg tell me what do i have to check to be sure that the cam i have now is the G6X3 ? i would take pic's for forum members so everything would be clear
Thread Starter
Instructor
Joined: Oct 2008
Posts: 221
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Thread Starter
Instructor
Joined: Oct 2008
Posts: 221
Likes: 0
nope it is not cuz that one is so far of me that it is hard for me to take it back to them
Safety Car
Joined: Sep 2007
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Assuming that LG uses the same marking scheme on all of their cams you should expect the specific model "G6X3" to be scribed on the rear of the cam. Shoot photos as your mechanic disassembles the motor. Specifically would like to see what the condition of the timing chain is, the condition and position of the cam sprocket bolts, the alignment of the two sprocket timing marks (crank and cam) and although it sounds like the head is already off on the damaged side it would be good to see the condition of the damaged valve both from the combustion chamber side and the valve cover side to include the rocker, retainer and keeper locks for the damaged valve.
I'm going out on a limb with this diagnosis but the fact that your previous mechanic swapped the G6XE for the G6X3 leads me to believe he probably did not pull the oil pump off during the swap making the crank side timing mark very hard to see and very easy to be off by one tooth.
Sorry to hear about your misfortune...it sounds expensive!
I'm going out on a limb with this diagnosis but the fact that your previous mechanic swapped the G6XE for the G6X3 leads me to believe he probably did not pull the oil pump off during the swap making the crank side timing mark very hard to see and very easy to be off by one tooth.
Sorry to hear about your misfortune...it sounds expensive!
Burning Brakes
Joined: Oct 2008
Posts: 767
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From: Ottawa Ontario
Sorry to hear this happened! Just look on the bright side you now have no excuse to take it to the next level, I see a stroker in your future. Here is what my G6X3 looked like, I hope it helps:
Safety Car
Joined: Aug 2004
Posts: 4,067
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From: Houston Texas
What about the PVC, is it something that will happen as soon as you start the engine or will it only happen during high rpm runs?
How do you find out for sure that there are no PVC issues specially when you are doing milling and different HG size?
How do you find out for sure that there are no PVC issues specially when you are doing milling and different HG size?
Melting Slicks
Joined: Oct 2000
Posts: 3,368
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From: dfw Texas
IMO a P2V clearence issue would crop up right away.. That being said i know 4-5 people personaly running the g6x3 on untouched heads that rev to 7000 routinely with out any P2v clearence issues.. i wonder if its possible to install it wrong?
