Valvespring ? with Pics
Thread Starter
TECH Apprentice
Joined: Mar 2007
Posts: 313
Likes: 5
From: Eastern PA
I was saying check them so you know if the cam is eating up the valvetrain or if it was just a bad spring. The lift isn't that high so it doesn't seem like you have overly aggressive lobes.
Thread Starter
TECH Apprentice
Joined: Mar 2007
Posts: 313
Likes: 5
From: Eastern PA
Thanks, we're going to carefully check each spring when we replace them for any abnormal wear.
Run a leakdown test on the cylinder with the broken spring when you get the new ones on it. Leave the rockers off and peck each valve stem with a hammer a couple of times so the valve with seat normally without actually having to run the engine and then do the test. I'd do that before I spent the time to change the rest of the springs with the head on the car. Not suggesting 100% that its going to be damaged, but you need to check before you waste a bunch of time doing springs the hard way.
Probably going to want to replace the valve seal on the one with the busted spring because it most likely leaned over and contacted the seal a bit. Look for polishing on the metal part of the seal.
Probably going to want to replace the valve seal on the one with the busted spring because it most likely leaned over and contacted the seal a bit. Look for polishing on the metal part of the seal.
Two people with custom cams with broken springs makes a trend even though its documented that several spring companys (mainly comp) have admitted to defective springs that have even broken on stock cammed cars. I think I know the "trend" cap is referring to, as usual. 
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
even with 1.6 RR coil bind should not be a issue......assumeing springs are installed at 1.800"
OP
what installed height are your springs?
hard to tell in the pics but are you running spring locators also?
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Verdad Gallardo Dont you know. Two people with custom cams with broken springs makes a trend even though its documented that several spring companys (mainly comp) have admitted to defective springs that have even broken on stock cammed cars. I think I know the "trend" cap is referring to, as usual.
Two people with custom cams with broken springs makes a trend even though its documented that several spring companys (mainly comp) have admitted to defective springs that have even broken on stock cammed cars. I think I know the "trend" cap is referring to, as usual.I just got done breaking 2 manley nextec valve springs...there just like the beehives...I also bent a valve, and I would put money on it that you did also. I would throw all those springs away and get patriot gold extremes. I did and car hasn't had a problem..btw I also have le2s
Well there is a 4th person in this thread who had troubles with a completely different and high quality spring.
I count 4.
wrd1972
speed_demon24
94Aquaformula
spudnick3119
That is just this thread.
I bought good parts the FIST time which on my first setup included the 918s put somewhere between 15-20K on them before swapping setups. I have never had a spring break.
Well there is a 4th person in this thread who had troubles with a completely different and high quality spring.
I count 4.
wrd1972
speed_demon24
94Aquaformula
spudnick3119
That is just this thread.
I bought good parts the FIST time which on my first setup included the 918s put somewhere between 15-20K on them before swapping setups. I have never had a spring break.
I count 4.
wrd1972
speed_demon24
94Aquaformula
spudnick3119
That is just this thread.
I bought good parts the FIST time which on my first setup included the 918s put somewhere between 15-20K on them before swapping setups. I have never had a spring break.
Comp 918's broke
Comp cam 918's broke
Comp revises the 918
How many breaks of 918's do we have on here
Comp 918 cost LS1 its life
From admin. My thoughts on the bad batches of 918's
Chalk up another 918 break
918 valve springs prone to breaking
Be prepared to lose sleep over 918 beehives
Bad Comp 918 springs. Official company policy
I can only hope that one day, I will be as infallible as you one day and get the holy parts the first time around. And you always fail to mention that even with my first cam, I never busted a single PAC 1218 spring. I broke two sets of 918's and some Manleys which both manufactures blamed on defective mexican made wire stock. I think the cam MAY have played a roll but I know a guy who still has that cam and the Patriot springs have held for years.
Last edited by wrd1972; Oct 10, 2010 at 08:25 PM.
Well there is a 4th person in this thread who had troubles with a completely different and high quality spring.
I count 4.
wrd1972
speed_demon24
94Aquaformula
spudnick3119
That is just this thread.
I bought good parts the FIST time which on my first setup included the 918s put somewhere between 15-20K on them before swapping setups. I have never had a spring break.
I count 4.
wrd1972
speed_demon24
94Aquaformula
spudnick3119
That is just this thread.
I bought good parts the FIST time which on my first setup included the 918s put somewhere between 15-20K on them before swapping setups. I have never had a spring break.
Bauer was irresponsibly specing cams besides the one above. That was probably the worst though.
Yes there was a bad batch of 918s, but once that happened every broken 918 was blindly blamed on the bad batch.
Oh and the link posted above about bad 918s is no good.
Yes there was a bad batch of 918s, but once that happened every broken 918 was blindly blamed on the bad batch.
Oh and the link posted above about bad 918s is no good.
I keep my broken 918 on my desk as a souvenir. Reminds me how lucky i was.
i put them on my heads when i had a stock cam. Then stepped it up to a 223/230 when i rebuilt my bottom end. after seeing afew high revving runs. that happened.
i put them on my heads when i had a stock cam. Then stepped it up to a 223/230 when i rebuilt my bottom end. after seeing afew high revving runs. that happened.
I cannot believe people are still running the Comp 918's after all the **** thats happened !!! I was one of the lucky unlucky people . I got a batch of the **** Mexican wire Comp 918's and had one break on me but didnt totally collapse . Thank god I didnt lose my motor due to the sheer ******* stupidity of Comp Cams . Go with PAC 1218's or 1518's . The chance of you having trouble with a PAC spring is almost non existent . Its not the cam or anything else than inferior quality of the spring causing them to break . FYI Comp Cams used to go through PAC to make their Beehives but Comp wanted a higher profit for lesser quality . So they outsourced their spring manufacturing to a company in mexico and kept their Valve Spring prices the same . The unsuspecting customer would then buy the junk now considered 1218 Beehives and BOOM they just lost their motor due to ******* GREED from Comp Cams !!! By PAC or Patriot and never look back again . Dont give Comp Cams a third chance by buying their inferior quality springs . Yes I said THIRD . This valve spring **** has happened two different times already from them trying to screw the customer with crap . /rant
I cannot believe people are still running the Comp 918's after all the **** thats happened !!! I was one of the lucky unlucky people . I got a batch of the **** Mexican wire Comp 918's and had one break on me but didnt totally collapse . Thank god I didnt lose my motor due to the sheer ******* stupidity of Comp Cams . Go with PAC 1218's or 1518's . The chance of you having trouble with a PAC spring is almost non existent . Its not the cam or anything else than inferior quality of the spring causing them to break . FYI Comp Cams used to go through PAC to make their Beehives but Comp wanted a higher profit for lesser quality . So they outsourced their spring manufacturing to a company in mexico and kept their Valve Spring prices the same . The unsuspecting customer would then buy the junk now considered 1218 Beehives and BOOM they just lost their motor due to ******* GREED from Comp Cams !!! By PAC or Patriot and never look back again . Dont give Comp Cams a third chance by buying their inferior quality springs . Yes I said THIRD . This valve spring **** has happened two different times already from them trying to screw the customer with crap . /rant
Devil's advocate:
How hard do you have to beat a spring of "clearly sufficient/adequate quality" when it's COLD to break it? Assuming lobes with a healthy ramp rate, lift exceeding .545", 1.8" installed height... Comp, PAC, Patriot, whatever springs.
How hard do you have to beat a spring of "clearly sufficient/adequate quality" when it's COLD to break it? Assuming lobes with a healthy ramp rate, lift exceeding .545", 1.8" installed height... Comp, PAC, Patriot, whatever springs.