Re: Damaged cylinder head repair
[Re: CSK]
#3082851
10/03/22 02:09 PM
10/03/22 02:09 PM
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Joined: Jan 2003
Posts: 19,384 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,384
Las Vegas
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As said EASY fix and by all means replace ALL the valves.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Damaged cylinder head repair
[Re: Al_Alguire]
#3082860
10/03/22 02:26 PM
10/03/22 02:26 PM
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Joined: Aug 2011
Posts: 2,872 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,872
Pattison Texas
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As said EASY fix and by all means replace ALL the valves. Yes, after further thought , ALL of the valves not just the intake
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Damaged cylinder head repair
[Re: CSK]
#3082863
10/03/22 02:33 PM
10/03/22 02:33 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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I Live Here
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Posts: 14,514
So. Burlington, Vt.
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Well, I see what’s 99% likely the cause of the failure. Yep, & replace ALL the intake valves, new springs & double check PV clearance My guess is, it’s the #1 reason for broken intake valves. On the plus side........ I’m liking the complete lack of carbon build up in that intake bowl.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Damaged cylinder head repair
[Re: fast68plymouth]
#3082895
10/03/22 02:59 PM
10/03/22 02:59 PM
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Joined: Feb 2005
Posts: 20,200 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,200
PA.
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Remember some broken pieces could have gone into other cylinders Even on the other side. My son had a 1/4 inch chunk of an Edelbrock intake valve in number three cylinder end up stuck in number 4 or 6 and pinch a ring.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Damaged cylinder head repair
[Re: fast68plymouth]
#3083030
10/03/22 08:49 PM
10/03/22 08:49 PM
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Joined: Jun 2014
Posts: 3,253 Md.
carnut68
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Well, I see what’s 99% likely the cause of the failure. Ok. Give me the good or bad news. The spring looks like new in that it was not moving around same for the keepers and retainer. No metal scuffing at all. I'm thinking the valve gave up. Or # 5 rod bearing went but it still had 60# oil pressure.
America First!
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Re: Damaged cylinder head repair
[Re: carnut68]
#3083053
10/03/22 10:08 PM
10/03/22 10:08 PM
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Joined: Dec 2021
Posts: 1,182 Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,182
Loudoun County, VA
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Don't know what the top of the piston w/ the broken valve looks like, but I'd be looking very closely at all of the piston tops for any indications of other valves possibly coming into contact, too.
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Damaged cylinder head repair
[Re: Brad_Haak]
#3083060
10/03/22 10:28 PM
10/03/22 10:28 PM
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Joined: Jun 2014
Posts: 3,253 Md.
carnut68
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Md.
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Don't know what the top of the piston w/ the broken valve looks like, but I'd be looking very closely at all of the piston tops for any indications of other valves possibly coming into contact, too. It's bashed up and has a hole were the valve stem went thru it. The cylinder wall looks fine. #7 did,but when? Probably after #5 broke.
America First!
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Re: Damaged cylinder head repair
[Re: krautrock]
#3083177
10/04/22 10:24 AM
10/04/22 10:24 AM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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I have some BBC heads here now that have a few valves showing the same thing.
There’s really only one way to get that shiny ring.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Damaged cylinder head repair
[Re: fast68plymouth]
#3083179
10/04/22 10:35 AM
10/04/22 10:35 AM
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Joined: May 2019
Posts: 714 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 714
Lake Villa Il
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There’s really only one way to get that shiny ring.
A very intimate relationship resulting in a shiny ring. Then everything crumbles after too much hitting and abuse. Sounds like a lifetime movie
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Damaged cylinder head repair
[Re: INTMD8]
#3083183
10/04/22 10:46 AM
10/04/22 10:46 AM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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The thing is, the fact that it’s showing contact for the full diameter means the valve is rotating, since nothing would touch all the way around otherwise.
So, the rotation means there is some degree of the stem flexing in different directions as the valve rotates around. Like bending a coat hanger back and forth......... it can only flex so many times before the material is fatigued and breaks.
In my mind, the question as to why the valve broke has been answered.
Also, the contact is not the result of valvetrain control problems. That’s not to say there couldn’t be some of that as well, but that won’t result in contact with an intake valve. When you float an intake valve, even if it’s lagging way behind the cam....... at IVC, the piston is nowhere near TDC. So, the only way to get the shiny ring on an intake valve is....... inadequate clearance during the IVO period.
It’s not all that uncommon for me to see this condition when I’m reconditioning heads.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Damaged cylinder head repair
[Re: carnut68]
#3083686
10/05/22 10:27 PM
10/05/22 10:27 PM
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Joined: Jun 2014
Posts: 3,253 Md.
carnut68
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Md.
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Any suggestions who to send the head to get it fixed?
America First!
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Re: Damaged cylinder head repair
[Re: carnut68]
#3083741
10/06/22 09:09 AM
10/06/22 09:09 AM
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Joined: May 2003
Posts: 13,202 aZLiViN
J_BODY
I Live Here
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I Live Here
Joined: May 2003
Posts: 13,202
aZLiViN
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Any suggestions who to send the head to get it fixed? Hopefully it’s a quality casting. I sent my leaky W5 head to a guy in Iowa that had brought sprint car heads back from the dead. My head basically crumbled as he tried to weld it.
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Re: Damaged cylinder head repair
[Re: carnut68]
#3083757
10/06/22 10:00 AM
10/06/22 10:00 AM
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Joined: Dec 2021
Posts: 1,182 Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,182
Loudoun County, VA
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Any suggestions who to send the head to get it fixed? Indy would be my first call, considering they did lots of cylinder head repair work in the past. Whether the new owners do any of that, you'll only know by asking.
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Damaged cylinder head repair
[Re: carnut68]
#3083901
10/06/22 07:49 PM
10/06/22 07:49 PM
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Joined: Jun 2014
Posts: 3,253 Md.
carnut68
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OP
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It's an Indy head. So that's good to hear. Thanks.
America First!
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Re: Damaged cylinder head repair
[Re: pittsburghracer]
#3083926
10/06/22 09:25 PM
10/06/22 09:25 PM
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Joined: Feb 2005
Posts: 20,200 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,200
PA.
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You won’t know till it’s taken apart and stripped but I’m betting it’s fixable. Jump on it and get it to a shop before everyone else. Winters coming. Indy may even fix it.
Wow I suggested Indy 10-1-22. Lol 😂
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Damaged cylinder head repair
[Re: pittsburghracer]
#3083950
10/06/22 11:13 PM
10/06/22 11:13 PM
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Joined: May 2003
Posts: 13,202 aZLiViN
J_BODY
I Live Here
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I Live Here
Joined: May 2003
Posts: 13,202
aZLiViN
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You won’t know till it’s taken apart and stripped but I’m betting it’s fixable. Jump on it and get it to a shop before everyone else. Winters coming. Indy may even fix it.
Wow I suggested Indy 10-1-22. Lol 😂 We don’t listen to old guys! …..all kidding aside it’s a great time we live in when you can actually recommend Indy for something.
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Re: Damaged cylinder head repair
[Re: carnut68]
#3084164
10/07/22 10:33 PM
10/07/22 10:33 PM
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Joined: Jun 2014
Posts: 3,253 Md.
carnut68
OP
master
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OP
master
Joined: Jun 2014
Posts: 3,253
Md.
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What about Brett Miller? He's within reasonable driving distance.
America First!
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