broken valve spring. questions
Originally Posted by PREDATOR-Z
From my years of experience, my advice is do not just change 1 spring or 1 valve etc...
Either take the heads off and have them rebuilt.
Or Buy another set of heads. You can get a set of Patriot stage 1 with 918's for $1000, all brand new parts 243 casting (LS2/LS6). They come with gaskets and bolts.
You can then use $199 for a new set of lifters and do all the work yourself.
Either take the heads off and have them rebuilt.
Or Buy another set of heads. You can get a set of Patriot stage 1 with 918's for $1000, all brand new parts 243 casting (LS2/LS6). They come with gaskets and bolts.
You can then use $199 for a new set of lifters and do all the work yourself.
What wrong with just changing 1 valve???? What is the reason that I cant mix??? This is al all a learnin curve or me. I have allready been conviced that I should change all the springs.
right now as it stands here is were the money s going
921 springs 398.00
spring compressor tool 129.00 or slp 60.00 slp good/bad tool??
seals??? 16.00
head gasket drivers 30.00
head bolt kit 25.00
1 intake valve ?????????
air fitting for spark plug w/gauge
TOTAL app. $620.00
Originally Posted by bernieblackbird
My thought was to send the head back to Cartek to have them check everything out. I dont like te idea that i have to do away with this set of heads. I did buy them in 2001 but they only have about 5,000 miles on them. If it works out cheaper to buy a new set I may just do that as long as i a not loosing power!!!
What wrong with just changing 1 valve???? What is the reason that I cant mix??? This is al all a learnin curve or me. I have allready been conviced that I should change all the springs.
right now as it stands here is were the money s going
921 springs 398.00
spring compressor tool 129.00 or slp 60.00 slp good/bad tool??
seals??? 16.00
head gasket drivers 30.00
head bolt kit 25.00
1 intake valve ?????????
air fitting for spark plug w/gauge
TOTAL app. $620.00
What wrong with just changing 1 valve???? What is the reason that I cant mix??? This is al all a learnin curve or me. I have allready been conviced that I should change all the springs.
right now as it stands here is were the money s going
921 springs 398.00
spring compressor tool 129.00 or slp 60.00 slp good/bad tool??
seals??? 16.00
head gasket drivers 30.00
head bolt kit 25.00
1 intake valve ?????????
air fitting for spark plug w/gauge
TOTAL app. $620.00
Last edited by cantdrv65; May 13, 2006 at 01:56 AM.
Originally Posted by cantdrv65
Sure you can change just one valve.... Dont spend more money than you have to. If none of the others touched the pistons they will be absolutely fine. Perform a leakdown on each cylinder before pulling the head. If all match (and are less than say 15%-20%) except for the bad cylinder...change the springs and repair the damaged valve/guide and you are ready to rock.
I believe he siad app 130 or something like that.
still weighin all options though what ever makes more sense. I wiil do
Just have to find tools and read about
I checked out LS1 how to's thanks sounds pretty straight foward
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by bernieblackbird
My thought was to send the head back to Cartek to have them check everything out. I dont like te idea that i have to do away with this set of heads. I did buy them in 2001 but they only have about 5,000 miles on them. If it works out cheaper to buy a new set I may just do that as long as i a not loosing power!!!
In general, todays CNC heads flow better than hand ported heads.
What wrong with just changing 1 valve???? What is the reason that I cant mix??? This is al all a learnin curve or me. I have allready been conviced that I should change all the springs.
Trick is, bent valve requires spec check on guide. From my experience, it is better changing the guide in order not to chance problems.
Change of valve requires valve job (on seat and valve)
right now as it stands here is were the money s going
921 springs 398.00
spring compressor tool 129.00 or slp 60.00 slp good/bad tool??
seals??? 16.00
head gasket drivers 30.00
head bolt kit 25.00
1 intake valve ?????????
air fitting for spark plug w/gauge
TOTAL app. $620.00
921 springs 398.00
spring compressor tool 129.00 or slp 60.00 slp good/bad tool??
seals??? 16.00
head gasket drivers 30.00
head bolt kit 25.00
1 intake valve ?????????
air fitting for spark plug w/gauge
TOTAL app. $620.00
There is no need for air fitting, you can do the TDC method. It is safer and requires no special tools.
My guesstimate is you'll be over $1000 by the time you're done.
I might add I wouldnt ship the head back to Cartek. Any local competant engine machine shop should be able to fix you up. If they charge too much just order a new set of CNCd heads like Predator has suggested. Thats what I did, but I bent 10 valves.. 
I still sold my ls6 cores for 300 bucks. 
In the end we are just trying to save you money, tally it all up and make your decision.
I still sold my ls6 cores for 300 bucks. In the end we are just trying to save you money, tally it all up and make your decision.
Originally Posted by PREDATOR-Z
2001 is a long time ago, CNC programs have evolved tremendeously.
In general, todays CNC heads flow better than hand ported heads.
Nothing is wrong with changing 1 valve, I was talking about springs.
Trick is, bent valve requires spec check on guide. From my experience, it is better changing the guide in order not to chance problems.
Change of valve requires valve job (on seat and valve)
Add fluids, water pump gasket, sealant, valve cover gasket, shipping head (back and forth), valve job labor, guide job, spring seats and retainers (unless they come with springs).
There is no need for air fitting, you can do the TDC method. It is safer and requires no special tools.
My guesstimate is you'll be over $1000 by the time you're done.
In general, todays CNC heads flow better than hand ported heads.
Nothing is wrong with changing 1 valve, I was talking about springs.
Trick is, bent valve requires spec check on guide. From my experience, it is better changing the guide in order not to chance problems.
Change of valve requires valve job (on seat and valve)
Add fluids, water pump gasket, sealant, valve cover gasket, shipping head (back and forth), valve job labor, guide job, spring seats and retainers (unless they come with springs).
There is no need for air fitting, you can do the TDC method. It is safer and requires no special tools.
My guesstimate is you'll be over $1000 by the time you're done.
Originally Posted by cantdrv65
I might add I wouldnt ship the head back to Cartek. Any local competant engine machine shop should be able to fix you up. If they charge too much just order a new set of CNCd heads like Predator has suggested. Thats what I did, but I bent 10 valves.. I still sold my ls6 cores for 300 bucks. In the end we are just trying to save you money, tally it all up and make your decision.
I still sold my ls6 cores for 300 bucks. In the end we are just trying to save you money, tally it all up and make your decision.The thing that pisses me off is that a stupid spring cost me so much. That it might be just as exspensive to by a new set of heads.
Anyone bought patriot heads before?????
Just wanted to say thanks to all the help so far this forum rules
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Originally Posted by Jimmy P
How did you first know that there was a problem in the first place? Was it idling like crap, wouldn't start?
On The Tree
Joined: Oct 2005
Posts: 160
Likes: 0
From: PNW
If you have a broken single valve spring, then you should not be running the motor. And you need to pull the head off to see what kind of piston and possible cylinder was damage you may have. I hope you have forged pistons.
Also you should check the bent valve, valve guide boss for cracks too. And check that pushrod and lifter.
Also you should check the bent valve, valve guide boss for cracks too. And check that pushrod and lifter.
