Comp Cams 918 spring broke
Thread Starter
Launching!
Joined: May 2004
Posts: 210
Likes: 1
From: Merritt Island, Florida
Comp Cams 918 spring broke 2000 SS. A Broken 26918 Comp Cams spring after only 100 miles on mild MTI C1 cam. Very nice on the phone and promptly sent me a full new set with seals. 
Well, that's a start....
I have not asked them yet to reimburse me for my mechanic's time, the one bent valve, resurfacing the valve seats or the tow truck.
HELP! The bent valve punched #3 piston pretty good. The single ding looks almost like you had the piston flycut. But not so deep, I'll measure it tomorrow..
"LS1 doctors" with all respect....WHAT ARE MY CHANCES? Can these LS1 pistons take a hit like that and keep on ticking? Is it likely or not likely there is more damage to the cam, bearings, etc?
I need your experience and your replies.
I know Comp Cams had a problem a while back and promised the LS1 community that was behind them.
Maybe some old stock found it's way to me. Let's hope so.
LOTS OF Thanks
Ram
2000 SS M6 black vert. MTI C1 cam, Jet hot LT's and Y Xcats, 4:10's, NOS, and stuff like that.....
Well, that's a start....
I have not asked them yet to reimburse me for my mechanic's time, the one bent valve, resurfacing the valve seats or the tow truck.
HELP! The bent valve punched #3 piston pretty good. The single ding looks almost like you had the piston flycut. But not so deep, I'll measure it tomorrow..
"LS1 doctors" with all respect....WHAT ARE MY CHANCES? Can these LS1 pistons take a hit like that and keep on ticking? Is it likely or not likely there is more damage to the cam, bearings, etc?
I need your experience and your replies.I know Comp Cams had a problem a while back and promised the LS1 community that was behind them.
Maybe some old stock found it's way to me. Let's hope so. LOTS OF Thanks
Ram
2000 SS M6 black vert. MTI C1 cam, Jet hot LT's and Y Xcats, 4:10's, NOS, and stuff like that.....
Last edited by rambo benson; Aug 21, 2004 at 12:59 AM. Reason: looks silly with all the cartoons
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
The stripe on the springs has changed color on the new ones.(BLUE)
Piston will have to be changed. Could have cracked something below visual line. motor has to come appart.
Piston will have to be changed. Could have cracked something below visual line. motor has to come appart.
Last edited by PREDATOR-Z; Aug 21, 2004 at 03:44 AM.
Thread Starter
Launching!
Joined: May 2004
Posts: 210
Likes: 1
From: Merritt Island, Florida
Originally Posted by rambo benson
Completely Out of time and money man...I respect your opinion but hope to gather more stories where someone got by with a dinged piston....?
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Verdad Gallardo Thread Starter
Launching!
Joined: May 2004
Posts: 210
Likes: 1
From: Merritt Island, Florida
Important News! My springs did not have blue stripes. Must be Old inventory! MAKE SURE YOUR COMP CAM SPRINGS ARE PAINTED WITH OBVIOUS BLUE STRIPES.
I expect Comp Cams will help me with my reasonable expenses. I will keep LS1tech commmunity posted as to the outcome. My mechanic charges half normal rates and I only expect to be reimbursed for what I paid.
The ding in the piston is only about 3mm deep max. I will post pix asap. Mechanics in the area who saw it say they would smooth it off and should be alright, sans N20. (there's another sacrifice)
Will keep you informed...
Ram
I expect Comp Cams will help me with my reasonable expenses. I will keep LS1tech commmunity posted as to the outcome. My mechanic charges half normal rates and I only expect to be reimbursed for what I paid.
The ding in the piston is only about 3mm deep max. I will post pix asap. Mechanics in the area who saw it say they would smooth it off and should be alright, sans N20. (there's another sacrifice)
Will keep you informed...
Ram
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
I'll tell you what to do. Get a G5X3 on a 112, this way you'll have to flycut pistons and that way all your cylinders will be done the same and will be balanced. (Kinda joking)
I would not run the motor without taking it appart once there is PV contact. Under stress, side skirt or pin area in piston, could be cracked, and will completely destroy your motor upon failure. You could just take the opportunity to check your rings and replace rod bolts.
I would not run the motor without taking it appart once there is PV contact. Under stress, side skirt or pin area in piston, could be cracked, and will completely destroy your motor upon failure. You could just take the opportunity to check your rings and replace rod bolts.
TECH Addict
Joined: Dec 2001
Posts: 2,298
Likes: 2
From: new england
Originally Posted by 99'Formula
Man I just ordered my 918's and now some people are having some problems. I hope thats just a cowincidence or else I am going to be disapointed.
Thread Starter
Launching!
Joined: May 2004
Posts: 210
Likes: 1
From: Merritt Island, Florida
Thanks you guys.
Predator, I know you are right...I just have no choice right now, outta time and funds....If she blows, I'll have to get a used LS1.
We've got a couple of mechanics saying they've seen a kiss like this and they have held up. (I'll get pix to show you the ding, maybe by Tuesday)
Anyone have an X Ray machine? kidding.
Predator, I know you are right...I just have no choice right now, outta time and funds....If she blows, I'll have to get a used LS1.
We've got a couple of mechanics saying they've seen a kiss like this and they have held up. (I'll get pix to show you the ding, maybe by Tuesday)
Anyone have an X Ray machine? kidding.
Teching In
Joined: Nov 2001
Posts: 15
Likes: 0
From: Florissant Mo.
Pretty much it looked like a fly cut for a big lift cam, only on the exhaust side. I sanded down the sharp edges to prevent hot spots and it didn't look too bad once it was dressed up. I got the head back on and the valve train back together today We will get the intake etc. on and start 'er up tommorow.
Did you buy them from a shop? I can't believe anyone would still be selling the "old" 918's. If you have an old set of non blue stripe 918's Comp will exchange them for you for free. So it makes no sense that any shop would sell them. Not to mention the blue stripes have been out almost 2 years.
Thread Starter
Launching!
Joined: May 2004
Posts: 210
Likes: 1
From: Merritt Island, Florida
Exactly...collecting dust on a shelf at MTI.
MTI sold them to me on 6-21-2004 along with the C1 cam, and other stuff.
Unless you already have '01 918's in your engine,
ONLY USE 918's WITH BLUE STRIPES!!!
Jason will help me post pix probly tomorrow. Tom's gett'n it done. Thanks guys
MTI sold them to me on 6-21-2004 along with the C1 cam, and other stuff.
Unless you already have '01 918's in your engine,
ONLY USE 918's WITH BLUE STRIPES!!!
Jason will help me post pix probly tomorrow. Tom's gett'n it done. Thanks guys
