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Holley carb disintegrating...ever seen this? #2381658
10/04/17 10:56 AM
10/04/17 10:56 AM
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
an8sec70cuda Offline OP
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an8sec70cuda  Offline OP
I Live Here

Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
My dad's '69 road runner, 440 w/ a 6 pack setup on it. Complete six pack setup bought brand new as a kit through Mopar back in 2006 or 2007 I think. Came w/ the air cleaner, 3 carbs, Edelbrock manifold, etc. This is a street car, 440 w/ 509 cam, worked over 906s, hemi 4 speed, 3.54 dana, etc. Even has air conditioning.

Ran great for a while, then started having a minor (we thought) issue after a few years. After the car sat for a day or two, it would run VERY rough and ragged the next time you drove it like it had 4 fouled plugs. After mile or two down the road, it would clear right up and run great.
Finally got tired of it when it started getting worse. The center carb was draining all its fuel out when it sat. I tore into it the other day and found the outboard carbs are fine, but the center carb's metering block is disintegrating. Looks like the dern thing is made of clay that got wet, then dried and cracked.
I can't believe it didn't turn into a water sprinkler and set the car on fire. You can see where the metering block is swollen, cracked, and was actually leaking a little through the casting itself.

Called Holley and they want the carb back. Said they'll either send it back w/ a new block on it or send me a whole new carb.
I've had a bunch of Holleys and rebuilt a lot of old ones...never seen anything like this before.

carb 1.jpegcarb 2.jpeg

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381660
10/04/17 10:57 AM
10/04/17 10:57 AM
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
an8sec70cuda Offline OP
I Live Here
an8sec70cuda  Offline OP
I Live Here

Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
More.

carb 3.jpegcarb 4.jpegcarb 6.jpeg

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381661
10/04/17 10:57 AM
10/04/17 10:57 AM
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
an8sec70cuda Offline OP
I Live Here
an8sec70cuda  Offline OP
I Live Here

Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
List and date code.

carb 5.jpeg

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381674
10/04/17 11:24 AM
10/04/17 11:24 AM
Joined: Sep 2003
Posts: 19,641
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,641
north of coder
i have had many carbs of different brands apart over my many years, but never have i seen anything like this !eek it will be interesting what holley says about what may have caused this. please follow through with their response.
beer

Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381675
10/04/17 11:24 AM
10/04/17 11:24 AM
Joined: Feb 2005
Posts: 20,203
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

Joined: Feb 2005
Posts: 20,203
PA.
Wholly crap. Never in my life did I see one that bad, or even close. I would be careful what you post especially if they are going to work with you. Some companies like to do damage control, some don't.


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




Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381679
10/04/17 11:33 AM
10/04/17 11:33 AM
Joined: Jan 2003
Posts: 1,255
Columbus, GA
Michael Ecks Offline
pro stock
Michael Ecks  Offline
pro stock

Joined: Jan 2003
Posts: 1,255
Columbus, GA
Restored hundreds of carbs. Never seen that kind of deterioration even on carbs much much older.


"The happiness of your life depends upon the quality of
your thoughts" ~ Roman Emperor Marcus Aurelius
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381685
10/04/17 11:42 AM
10/04/17 11:42 AM
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
an8sec70cuda Offline OP
I Live Here
an8sec70cuda  Offline OP
I Live Here

Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
Didn't mean to sound like I was bad mouthing Holley, not what I intended at all. The guy I talked to was great to deal with and I'm not mad at all about it. We've had the thing for 10+ years anyway. Just curious if anyone else has seen this.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381694
10/04/17 11:56 AM
10/04/17 11:56 AM
Joined: Jan 2003
Posts: 1,237
North Central, Indiana
Roughbird72 Offline
pro stock
Roughbird72  Offline
pro stock

Joined: Jan 2003
Posts: 1,237
North Central, Indiana
I have many Holley carbs and extra parts over the years, but never seen anything that bad shruggy


72 Plymouth Roadrunner 11.08@123.25
Re: Holley carb disintegrating...ever seen this? [Re: Roughbird72] #2381704
10/04/17 12:12 PM
10/04/17 12:12 PM
Joined: Feb 2005
Posts: 20,203
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

Joined: Feb 2005
Posts: 20,203
PA.
Probably not the case with that one BUT years from now I see big issues coming because of alcohol content. I know from running alcohol extra maintenance is needed and luckily I can do it. My Sons fuel regulator needs the top taken off of it every time the car sits for over 3 weeks. I got caught with bad floats on my 3 year old carb early this year and from now on will be changed out every other year. 10% alcohol in pump gas and some places have 10% and on up to 85% so extra care will be needed by all.


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




Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381708
10/04/17 12:19 PM
10/04/17 12:19 PM
Joined: Dec 2007
Posts: 12,592
Great Neck,LI,new york
hemi-itis Offline
I Live Here
hemi-itis  Offline
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Joined: Dec 2007
Posts: 12,592
Great Neck,LI,new york
Never seen or heard of such deterioration!


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381717
10/04/17 12:32 PM
10/04/17 12:32 PM
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
S
StealthWedge67 Offline
master
StealthWedge67  Offline
master
S

Joined: Jul 2006
Posts: 4,319
Puyallup, WA
Was it only one of the carbs, or all 3 that showed this sort of decay? I sure hope Holley steps up and takes care of you. Looks like they had some bad RM's go through their foundry.


LemonWedge - Street heavy / Strip ready - 11.07 @ 120
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381718
10/04/17 12:33 PM
10/04/17 12:33 PM
Joined: Oct 2007
Posts: 4,213
New York
polyspheric Offline
master
polyspheric  Offline
master

Joined: Oct 2007
Posts: 4,213
New York
Alcohol


Boffin Emeritus
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381722
10/04/17 12:36 PM
10/04/17 12:36 PM
Joined: Jul 2004
Posts: 19,318
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,318
State of confusion
Originally Posted By an8sec70cuda
My dad's '69 road runner, 440 w/ a 6 pack setup on it. Complete six pack setup bought brand new as a kit through Mopar back in 2006 or 2007 I think. Came w/ the air cleaner, 3 carbs, Edelbrock manifold, etc. This is a street car, 440 w/ 509 cam, worked over 906s, hemi 4 speed, 3.54 dana, etc. Even has air conditioning.

Ran great for a while, then started having a minor (we thought) issue after a few years. After the car sat for a day or two, it would run VERY rough and ragged the next time you drove it like it had 4 fouled plugs. After mile or two down the road, it would clear right up and run great.
Finally got tired of it when it started getting worse. The center carb was draining all its fuel out when it sat. I tore into it the other day and found the outboard carbs are fine, but the center carb's metering block is disintegrating. Looks like the dern thing is made of clay that got wet, then dried and cracked.
I can't believe it didn't turn into a water sprinkler and set the car on fire. You can see where the metering block is swollen, cracked, and was actually leaking a little through the casting itself.

Called Holley and they want the carb back. Said they'll either send it back w/ a new block on it or send me a whole new carb.
I've had a bunch of Holleys and rebuilt a lot of old ones...never seen anything like this before.


Have seen that just a couple times lately and the plating is separating/flaking off of the carb parts and why I steer away from the old junk and only build alum/billet when possible......... thumbs And these were gasoline not alcohol..........

Last edited by Thumperdart; 10/04/17 12:38 PM.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381726
10/04/17 12:40 PM
10/04/17 12:40 PM
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
an8sec70cuda Offline OP
I Live Here
an8sec70cuda  Offline OP
I Live Here

Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
The other carbs both look fine, but the outboards don't have metering blocks. The main body and bowls on all 3 look fine. It's just the metering block. Has to be a metallurgy issue.
It's not just the coating, the entire block is coming apart.

The dominator on my hemi is just as old and has also had pump gas run through it. No issues w/ that one.
This car does a good bit of sitting up though...probably what did it in.

93 octane pump premium, nothing else has been in it.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381728
10/04/17 12:45 PM
10/04/17 12:45 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1 Offline
Too Many Posts
Challenger 1  Offline
Too Many Posts

Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
93 premium has lots of ethanol in it. More than 87 and 89, ethanol is how they get the octane to 93.

Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381731
10/04/17 12:47 PM
10/04/17 12:47 PM
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
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Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
For a car that sits like that, I'd be looking at using something like "carb defender" in it.

Although I doubt it would have helped prevent what you have going on there..... But it might have.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381735
10/04/17 12:49 PM
10/04/17 12:49 PM
Joined: Jul 2004
Posts: 19,318
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,318
State of confusion
Originally Posted By an8sec70cuda
The other carbs both look fine, but the outboards don't have metering blocks. The main body and bowls on all 3 look fine. It's just the metering block. Has to be a metallurgy issue.
It's not just the coating, the entire block is coming apart.

The dominator on my hemi is just as old and has also had pump gas run through it. No issues w/ that one.
This car does a good bit of sitting up though...probably what did it in.

93 octane pump premium, nothing else has been in it.


I also noticed what looked like a crack by the mixture screw..........the ones I had were flaking and separating that's the best way to describe it and have pics I posted of FB............


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381740
10/04/17 12:56 PM
10/04/17 12:56 PM
Joined: Oct 2003
Posts: 11,686
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
I Live Here

Joined: Oct 2003
Posts: 11,686
W. Kentucky
I've been around these since the mid 70's and never seen anything like that. It looks like it could just crumble and fall apart. Hopefully Holley will step up.

Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381752
10/04/17 01:13 PM
10/04/17 01:13 PM
Joined: Jan 2003
Posts: 4,101
Shelby Twp. Mi
HardcoreB Offline
master
HardcoreB  Offline
master

Joined: Jan 2003
Posts: 4,101
Shelby Twp. Mi
That WON'T buff-out...I think you are overtightening it not knowing your own strength? CRUSHING the weak little girly blocks? Time for some MANLY Thumper blocks!

Re: Holley carb disintegrating...ever seen this? [Re: an8sec70cuda] #2381756
10/04/17 01:17 PM
10/04/17 01:17 PM
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
O
Old School Offline
super stock
Old School  Offline
super stock
O

Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
Are you sure you didn't find that carb on the bottom of Lake Marion? 😁😁😁


68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
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