Indy head users...Ever see this?
#1272807
07/23/12 06:46 PM
07/23/12 06:46 PM
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Joined: Mar 2003
Posts: 2,504 PA
moparacer
OP
master
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OP
master
Joined: Mar 2003
Posts: 2,504
PA
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I broke a valve spring on my engine and when it broke, it spun around and chewed up the spring pocket that was machined into the head. I had been having trouble with metal in the oil ever since I put these -1s on the engine, and as a matter of fact, it blew up the first day out with the new heads on it...
Well, come to find out after I pulled it apart last night that the metal around the spring pockets is so thin in spots, the springs can break chunks of it off and get into the oil.
Look at this pic of the spring pocket that broke.
See where it had been breaking off prior to the spring breaking? And look at the spring right beside it. See where its been breaking off and getting into the oil? There is a piece about ready to go....
Just thought I would post this and save someone a years worth of headache and broken parts like I have had....
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: Indy head users...Ever see this?
[Re: pittsburghracer]
#1272812
07/23/12 08:04 PM
07/23/12 08:04 PM
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Joined: Feb 2005
Posts: 20,174 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,174
PA.
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Pretty sure it was hemi Fred that posted the link showing how much a valve spring rotates in the pocket at different rpm's. I couldn't find the link but it is a good one to watch.
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: Indy head users...Ever see this?
[Re: catman408]
#1272819
07/23/12 10:29 PM
07/23/12 10:29 PM
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Joined: Mar 2003
Posts: 2,504 PA
moparacer
OP
master
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OP
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Joined: Mar 2003
Posts: 2,504
PA
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The next small block will be a Chevy Felix. I could have bought 4 or 5 for what I have went through trying to be a Mopar purist. And I would bet a Brodix or a Dart head would have the spring seats cast properly to boot.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: Indy head users...Ever see this?
[Re: moparacer]
#1272820
07/23/12 10:32 PM
07/23/12 10:32 PM
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Joined: Jan 2009
Posts: 1,044 Victoria, Australia
Ian
super stock
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super stock
Joined: Jan 2009
Posts: 1,044
Victoria, Australia
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Quote:
Quote:
machine the heads for a proper spring cup and that'll end your problems.
Whats the proper spring cups? Its a 1.55 OD spring supplied by Bullet. #VS8100
As you can see they have the locators for the inner springs on them already.
your locator may be the wrong size for your spring COMP VALVE SPRING ID LOCATORS 1.550" O.D. Spring Inside Dia .715" .060" Thick
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Re: Indy head users...Ever see this?
[Re: moparacer]
#1272822
07/23/12 11:50 PM
07/23/12 11:50 PM
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Joined: Jan 2009
Posts: 1,044 Victoria, Australia
Ian
super stock
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super stock
Joined: Jan 2009
Posts: 1,044
Victoria, Australia
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Quote:
Quote:
Quote:
Quote:
machine the heads for a proper spring cup and that'll end your problems.
Whats the proper spring cups? Its a 1.55 OD spring supplied by Bullet. #VS8100
As you can see they have the locators for the inner springs on them already.
your locator may be the wrong size for your spring COMP VALVE SPRING ID LOCATORS 1.550" O.D. Spring Inside Dia .715" .060" Thick
Mine are .060 thick .730 ID and correct for the spring.
try these COMP CAMS VALVE SPRING LOCATOR SEAT CUPS 1.780" O.D. .640" I.D. .060" Thick
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