Broken Valve - Need Advice!! - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Clarkstar · 03-01-2020, 11:47 AM

Quote:

Originally Posted by AV95z

Update. I'm getting the car towed home today. I'm going to start pulling the motor apart myself. This isn't going be to a quick repair, I'll keep you all posted and I'm sure I'll be asking for more advice along the way.

Good choice!!!

AV95z · 03-08-2020, 08:17 PM

Think I found the problem...

InFiD3ViL · 03-08-2020, 10:32 PM

Damn, how the hell do your yellow valve springs look brand new? They stopped making the yellow beehives some time ago and those look brand new.

Anyhow, I think you got super lucky here. Retainer and locks stayed put and did their job. Play the lotto my man.

mcbuff52 · 03-09-2020, 06:01 AM

This engine is not hard to pull. You can pull it, and rebuild it with a cam you choose. If the cyl. is damaged it can be sleeved. You can purchase one head new. This is probably the cheapest route if you have mechanical skills, and the time to do it. I'm from Mass. too! Somerset. Good luck.

Moto-Mojo · 03-09-2020, 09:37 AM

First post OP said it had a banged up piston. I suppose it could still run that way, right? Also, did the piston damage occur because the broken spring let the valve slip too low?? Trying to educate my self here...

Greenhornet2 · 03-09-2020, 10:16 AM

Quote:

Originally Posted by Moto-Mojo

First post OP said it had a banged up piston. I suppose it could still run that way, right? Also, did the piston damage occur because the broken spring let the valve slip too low?? Trying to educate my self here...

Yes a broken spring will leave the valve hanging open. Piston comes up and smacks the valve. Are you asking if it will run if you just replace the valve spring? It will run, likely misfire on that cylinder because the valve will likely be bent and not seal. Also the piston and valve are compromised since they hit each other.

Aqua Blue RS/SS · 03-09-2020, 12:11 PM

Quote:

Originally Posted by AV95z

Think I found the problem...

Yep that will do it. Time for a bad ass set of heads! Might be able to get off with just replacing the one piston... but then again where’s the fun in that. At least you didn’t break the head off the valve.

Moto-Mojo · 03-09-2020, 12:15 PM

Who here considers replacing stock-for-stock valve springs as a matter of preventative maintenance? (assuming no other performance mods were done)

AV95z · 03-09-2020, 01:18 PM

Quote:

Originally Posted by InFiD3ViL

They stopped making the yellow beehives some time ago and those look brand new.

Was there a reason they stopped making them?

silversleeper · 03-09-2020, 01:56 PM

I'd just try to repair it and not go wild on a build since that wasn't your priority for it in the past.
I'd pull that head and see if the valve guide could be replaced if the chamber and seat aren't beat.
Then a new oem type valve, PAC springs all around, and a mild inexpensive LS9 cam
https://www.summitracing.com/parts/n...8427?rrec=true

And an OEM piston weighed to the same as the one you took out so no crank balancing.
I don't see a need for you to do a big rebuild or forged supercharged NOS etc unless it's a goal you haven't shared.

And a new lifter and consider trunion bushing upgrade while you're in there.

AV95z · 03-15-2020, 10:37 AM

Got the head off yesterday. What do you guys think about the piston? Damage seems very minimal, would it be okay to use as is?

Pushrod obviously took a good whack. Thoughts on the lifter and cam?

gunchamp · 03-15-2020, 10:58 AM

Quote:

Originally Posted by AV95z

Update. I'm getting the car towed home today. I'm going to start pulling the motor apart myself. This isn't going be to a quick repair, I'll keep you all posted and I'm sure I'll be asking for more advice along the way.

Best thing you can do. Such satisfaction doing this yourself. If you have some mechanical ability, its not hard. I actually find it quite enjoyable. Plus you know what you got when finsihed

CamaroBarb · 03-15-2020, 11:04 AM

You're fine, that little mark mean's absolutely nothing. I'd replace all the springs with GM performance stuff and enjoy your car. You dodged a bullet for sure!

LevonH · 03-15-2020, 11:18 AM

Check the lifters and cam very carefully. If the push rod is bent as shown, the cam and lifter could be damaged as well. Better to know now than find out later.

03-08-2020, 08:17 PM	#30
AV95z Drives: 2010 Camaro 2SS/RS, 1995 Z28 Join Date: Mar 2012 Location: Massachusetts Posts: 52	Think I found the problem... Attached Images

03-08-2020, 10:32 PM	#31
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,574	Damn, how the hell do your yellow valve springs look brand new? They stopped making the yellow beehives some time ago and those look brand new. Anyhow, I think you got super lucky here. Retainer and locks stayed put and did their job. Play the lotto my man. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

03-09-2020, 09:37 AM	#33
Moto-Mojo Fast Cars and Old Guitars Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012 Location: N. CA Posts: 3,973	First post OP said it had a banged up piston. I suppose it could still run that way, right? Also, did the piston damage occur because the broken spring let the valve slip too low?? Trying to educate my self here... __________________ “I don’t want to belong to any club that would have me as a member.” - Groucho Marx

03-09-2020, 12:15 PM	#36
Moto-Mojo Fast Cars and Old Guitars Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012 Location: N. CA Posts: 3,973	Who here considers replacing stock-for-stock valve springs as a matter of preventative maintenance? (assuming no other performance mods were done) __________________ “I don’t want to belong to any club that would have me as a member.” - Groucho Marx

03-09-2020, 01:56 PM	#38
silversleeper Big Crow Drives: '13 ZL1 Join Date: Mar 2017 Location: California Posts: 1,486	I'd just try to repair it and not go wild on a build since that wasn't your priority for it in the past. I'd pull that head and see if the valve guide could be replaced if the chamber and seat aren't beat. Then a new oem type valve, PAC springs all around, and a mild inexpensive LS9 cam https://www.summitracing.com/parts/n...8427?rrec=true And an OEM piston weighed to the same as the one you took out so no crank balancing. I don't see a need for you to do a big rebuild or forged supercharged NOS etc unless it's a goal you haven't shared. And a new lifter and consider trunion bushing upgrade while you're in there. Last edited by silversleeper; 03-09-2020 at 02:06 PM.

03-09-2020, 06:01 AM	#32
mcbuff52 Drives: 2010 Camaro 2SS/RS A6 Join Date: Nov 2018 Location: Bourg, La. Posts: 74 View My Garage	This engine is not hard to pull. You can pull it, and rebuild it with a cam you choose. If the cyl. is damaged it can be sleeved. You can purchase one head new. This is probably the cheapest route if you have mechanical skills, and the time to do it. I'm from Mass. too! Somerset. Good luck.

03-15-2020, 10:37 AM	#39
AV95z Drives: 2010 Camaro 2SS/RS, 1995 Z28 Join Date: Mar 2012 Location: Massachusetts Posts: 52	Got the head off yesterday. What do you guys think about the piston? Damage seems very minimal, would it be okay to use as is? Pushrod obviously took a good whack. Thoughts on the lifter and cam? Attached Images

03-15-2020, 11:04 AM	#41
CamaroBarb Banned Drives: cheby Camaro Join Date: Aug 2019 Location: usa Posts: 575	You're fine, that little mark mean's absolutely nothing. I'd replace all the springs with GM performance stuff and enjoy your car. You dodged a bullet for sure!

03-15-2020, 11:18 AM	#42
LevonH Chevy Enthusiast. Drives: 2015 Camaro ZL1 Summit White Join Date: Jan 2019 Location: Calgary Area, Alberta Posts: 221	Check the lifters and cam very carefully. If the push rod is bent as shown, the cam and lifter could be damaged as well. Better to know now than find out later. __________________ Levon H. Bone Stock