Found my valve train noise problem / bad head :(
#680341
04/25/10 09:58 PM
04/25/10 09:58 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Well, took the car out today and it seemed to be running good.... I hope this link works: http://www.facebook.com/video/video.php?v=1278280237340Then right about when I got home it started making bad noises. Pulled the valve covers, and found the #3 exhaust pushrod sitting between the intake and exhaust rockers. At first I thought I may have bent a pushrod? went to remove the rocker arms/shaft and the center hold down was really loose:
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Re: Found my valve train noise problem / bad head :(
[Re: '72CudaRacer]
#680346
04/25/10 10:16 PM
04/25/10 10:16 PM
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Posts: 5,399 Aurora, Colorado
451Mopar
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It looks like there was a flaw in the casting? the other head and all the other rocker stands look fine. The heads are new Victor MW heads, running T&D 1.6:1 rockers. I need to call Edelbrock and see if they will warranty the head, but I'm still out several hours of porting and a valve job, not to mention I don't know where the other 1/2 of the stand went! I'll probably have to pull the motor, clean it out and hope that is the only dammage I need to go through my old photos and check if there may have been evidence of a crack there when I got the heads? Maybe i should have got the procomp heads
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Re: Found my valve train noise problem / bad head :(
[Re: 440forPOWER]
#680347
04/25/10 10:19 PM
04/25/10 10:19 PM
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Joined: May 2008
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Quote:
Is that a pro comp head?
Look at second photo right hand side.. New Edelbrock heads that what is really upsetting
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Re: Found my valve train noise problem / bad head :(
[Re: lilred]
#680350
04/26/10 07:42 AM
04/26/10 07:42 AM
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Joined: May 2007
Posts: 1,443 Maryland
Dads426
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If there is enough thread engagement with the stud, I would just mill it flat and use a billet hold down like they use on the early max wedge heads. Angelucci Manufacturing Maybe they will sell you just one. You may have to shim/machine it to get the right height.
2012 422 Allstars NSS Champion 2013 422 Allstars NSS Champion 2014 422 Allstars NSS Champion
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Re: Found my valve train noise problem / bad head :(
[Re: 572B1]
#680352
04/26/10 08:13 AM
04/26/10 08:13 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Quote:
How much side clearance on the rockers.
I'll have to go measure? The is no visual evidence on the rockers or spacers of the side clearance being too tight.
Maybe I should tig weld in some gussets on all the stands after fixing this one
I'm probbably screwed on the warranty because I bought the heads in June of 2008. Besides It may be easier to fix the rocker stand then get a new head, port it, do valve job, cut spring seats, and clearance the pushrod holes.
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Re: Found my valve train noise problem / bad head :(
[Re: Dads426]
#680353
04/26/10 12:59 PM
04/26/10 12:59 PM
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Joined: Nov 2003
Posts: 2,715 closer to Canadian beer!
torkrules
I'm neurotic
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I'm neurotic
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Quote:
If there is enough thread engagement with the stud, I would just mill it flat and use a billet hold down like they use on the early max wedge heads. Angelucci Manufacturing Maybe they will sell you just one. You may have to shim/machine it to get the right height.
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Re: Found my valve train noise problem / bad head :(
[Re: 451Mopar]
#680354
04/26/10 02:26 PM
04/26/10 02:26 PM
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Anonymous
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i've seen that type of failure before. we make bolt on rocker stands but we have to have the head to do it. i would say from what i've seen in the past, it's not normally the fault of the head. in any event, it's certaily repairable.
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Re: Found my valve train noise problem / bad head :(
[Re: AndyF]
#680357
04/26/10 07:39 PM
04/26/10 07:39 PM
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I did have 0.020" rocker shaft shims, could that have caused the problem? The cam is a Comp HXL lobe profile which I think is more agressive profile than normal, but is supposed to have better harmonics that the .440 lobe profiles. The cam is not that big, only 264/264 @ 0.050", 0.714"/0.714" lift (with the 1.6:1 ratio), 112 LSA, installed at 108. Have 1.6:1 ratio T&D rockers, and 3/8" Smith Brothers pushrods, and all the pushrods/rocker gear appear to be oiling fine. The springs are PAC 1325 with Crower Ti retainers (+0.100"), machined steel 10-degree locks (standard height), 0.060" spring seat with the correct size inner locator, spring install height is 1.950", seat pressure is 275#, I think the open pressure is 715#, no problem with coil bind, or retainer to guide clearance. I also have plenty of piston to valve clearance. Originally I wanted to install the springs at 2.00" using +0.050" locks which would have reduced the seat pressure to 250#, but the retainer was too close to the bottom of the rocker arm, so I used the standard locks and 1.950" install height. Could it be the spring pressures are too high for the stands?
Last edited by 451Mopar; 04/26/10 07:49 PM.
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Re: Found my valve train noise problem / bad head :(
[Re: 451Mopar]
#680359
04/26/10 09:38 PM
04/26/10 09:38 PM
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Joined: Dec 2006
Posts: 3,667 Arizona
Chris'sBarracuda
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Quote:
Quote:
Is that a pro comp head?
Look at second photo right hand side.. New Edelbrock heads that what is really upsetting
If I am seeing it right, I see the piece you are missing.. Right below the head bolt..
Chris..
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Re: Found my valve train noise problem / bad head :(
[Re: Chris'sBarracuda]
#680360
04/26/10 11:16 PM
04/26/10 11:16 PM
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Joined: Jan 2003
Posts: 2,405 Wichita,KS
Blakcharger440
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Quote:
Quote:
Quote:
Is that a pro comp head?
Look at second photo right hand side.. New Edelbrock heads that what is really upsetting
If I am seeing it right, I see the piece you are missing.. Right below the head bolt..
Chris..
Yep, I see it too! Just below the rocker stand that is to the right of the damaged one.
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