Broken ear (flange) on Holley carb - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-02-2005, 11:37 PM
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Broken ear (flange) on Holley carb

I've got a Holley carb that the back passenger side ear (flange, where it bolts to the intake) has broken. I don't know if I had it in a bind or what. A buddy suggests JB Weld? The break is clean and is even with the carb body. The surface area where the gasket goes between the carb and the intake does not appear to be affected. It also appears that the base of the carb can be removed and if so can a new base be purchased. Carbs are not my strongest area. The carb was a gimme, and I have not located an actual model number. There is a number on the base of 4777 if this has any relevance. Just need a low price fix right now, budget can't stretch for a new carb.


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Carb - model #4150- part #4777 (650cfm) Double Pumper

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Last edited by ford302; 01-03-2005 at 12:10 AM.
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Old 01-03-2005, 06:10 AM
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JB Weld will NOT work, it has to be welded or replaced.
Its caused from a warped surface or over torquing.
Watch eBay for used carb parts to get one if you cannot get it welded.
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Old 01-03-2005, 06:19 AM
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definitely needs to be welded while bolted on a very flat backing piece for alignment.

? $20, local welding shop, doesn't need to be pretty just strong and straight.

10ft/lbs is usually all you need to mount a carb , re-torque to 10 again after a week ? of heat cycling the motor for gasket compression.
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Old 01-03-2005, 06:49 AM
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I had the same thing happen to me, and when we checked the base plate for straightness, it was warped something terrible. Called Holley on this, and since I was second owner of the carb, I was out of luck. As around, some people keep the older base plates laying around, got mine for $20.
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Old 01-03-2005, 02:26 PM
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FYI,
Most get warped from the plastic type of spacers, not the metallic ones.
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Old 01-03-2005, 02:34 PM
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Well I would use an aluminum rod and a propane torch and reattach it. I have done this on other aluminum pieces and it works good. The worse that can happen is you break it. Well its broke now so whats the loss. They advertise aluma-weld on the tv around here and I tried to find some locally. I had no luck but did find a similar rod at the local hardware store. Thats what I have been using. I braised a 1/2 inch x 4 inch hole in a timing cover on a nissan. My son drove it for 3 years before he got rid of it. I guess I am cheap. The nissan dealer wanted $380 for the new cover and for $5 I fixed it.
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Old 01-03-2005, 04:38 PM
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Maybe you will get lucky and find a base plate that comes with the blades attached and the crossshaft is in decent shape.If not,a used carb can be found for relatively cheap on e-bay,or your local TraderI tried a long time ago to remove the blades from the shaft and found out they were staked on after I broke a head off.I would lnow the correct way to do it now,I just do not have the desire to do it. Kind of like rebuilding a starter.I can do it but with the cost of a rebuilt,just do not see the point.I am not mixing apples with oranges here on the carb,just making a point.
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Old 01-03-2005, 05:32 PM
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broken base plate

Been there. Scrap it and get another base plate, transfer all the parts over if you can get a bare one.

The carb model number is stamped on the choke horn.

The # 4777 comes back to a 4150 series 650 CFM.
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Old 01-03-2005, 05:40 PM
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Appreciate all the responses, I guess I will start trying to locate a baseplate.

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Old 01-03-2005, 05:48 PM
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Broken base plate

I had one break an ear on me one time, the break was close to the hole, so I was able to take a couple large washers and they extended out over the break and clamped down on the other side of the break. That was a temp fix til I located another base plate and got it installed.

PS: I put the broken ear on the stud and aligned the two pieces together at the break before dropping on the washers.
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Old 01-04-2005, 03:50 AM
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suggestion,

If you do replace the base, it's a good time to have the carb rebuilt if it has some years on it.

When you re-install it, coat both sides of the gasket with Permatex "form a gasket"

Double up on the gaskets if your new base is warped, just retorque the studs 2-3 times over a month

Max Keith's washer plan is good even if the studs aren't broken. Use a fender washer and grind the outside only enough to align the hole with the stud.
It flexes and distributes the nut torque over more area.

If my carb was workin great and new(?), I would put a weld on the 2 vertical sides and use the info above. Never found and bought a "good" used carb part. (If you knew it was good, why would you sell it....)
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Old 01-04-2005, 03:55 AM
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Proform is making Holley parts and they are really nice made and perform better so they say?
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Old 01-04-2005, 03:09 PM
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This place has them.
http://www.blp.com/
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