Re: edelbrock throttle shaft's
[Re: pjc360]
#1395565
03/01/13 06:13 PM
03/01/13 06:13 PM
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Joined: Apr 2008
Posts: 117 Aus
hysteric
member
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member
Joined: Apr 2008
Posts: 117
Aus
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Quote:
Also is there anybody in the buissness of fixing worn throttle shafts on the edelbrock carburetors? All of my edelbrock carburetor books say that once the throttle shaft is leaking the carburetor is ruined and its time to get a new one....
I have had Holley base plates bushed with teflon and would imagine someone who repairs carbs would be able to do your Edelbrock carb.
Hysteric
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Re: edelbrock throttle shaft's
[Re: pjc360]
#1395567
03/01/13 09:57 PM
03/01/13 09:57 PM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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check with member Scott Smith/HARMS AUTO = scott HARMS smith he restores carbs and maybe he can do it, he does the stock mopar afb ect. do a search here on the board for him and look at some of the rare carbs he has restored. looks like art work when done. IMHO. maybe lube them every so often so the alum does not dry out and wear from a dry shaft. I spray my shaft/linkage once a month with spary silicone lube, my carb was new in 01' still work great and it keeps the carb body from getting the white flaking corrosion build up from the open hood scoop. are you sure you got a new one and not a reamufactured one from edelbroke?
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Re: edelbrock throttle shaft's
[Re: scratchnfotraction]
#1395568
03/01/13 10:54 PM
03/01/13 10:54 PM
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Joined: Jan 2003
Posts: 42,714 Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
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Hi, Thanks for the kind words guys. I'm probably not the right guy for that job, my main business is restoring older/original carbs. While I can certainly fix this Edelbrock, my price might be cost prohibitive for an aftermarket carb rebuild. All that aside, I would highly doubt that the throttle shaft is worn out, that is unless in the rare case it has some sort of casting flaw or you've been using WAY too much return spring pressure. All throttle shafts have some slack in them, they are designed that way, they are not designed to be a tight vacuum/fuel leak sealed area. That said they shouldn't be exessively sloppy or noticabley leak fuel either. Common reasons for your problem is either improperly adjusted floats or a bad needle and seat, todays gasoline has a lot of ethanol in it which can quickly damage the viton rubber which can ruin the needle/seat seal. If you think you have a vacuum leak I'd look elsewhere like port accessory hoses, intake to carb gaskets. intake manifold gaskets, etc.
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Re: edelbrock throttle shaft's
[Re: Y3 70 BEE]
#1395573
03/04/13 10:23 AM
03/04/13 10:23 AM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
Throttle shafts leak fuel because of flooding, not because of slop in shaft. Your seeping fuel out somewhere in the carb and it is coming out at the shaft.
I do agree also a heavy return spring can wear away at the cast alum body but should only become a vac leak.
if it is flooding or has a crack in the main body somewere is the only time gas should be seen at the outside at the shaft.
i would maybe see if edelbrock would warranty it as a defect in materails??
maybe they can refurbish it by replacing the main body only for you.
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Re: edelbrock throttle shaft's
[Re: pjc360]
#1395574
03/04/13 01:58 PM
03/04/13 01:58 PM
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Joined: Nov 2008
Posts: 660 San Diego
formula S
mopar
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mopar
Joined: Nov 2008
Posts: 660
San Diego
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Quote:
I reas that running the throttle return spring in front of the carburetor helps the life of the throttle shafts, on my 600 performer i had my throttle return spring opulling the same direction as my throttle cable and my transmission cable, i bought a bracket yesterday to make the throttle return spring be in front of the carburetor, so hopefully that will help with the life of the throttle shaft on my new 650, i will buy some white lithium grease and spray the throttle shaft with it once a month as well. Anything else anyone can think of to help it last longer?
The problem is that the transmission kickdown cable is using the throttle shaft as a pivot point and creating a load on the shaft, and the factory set up did not. The stock set up used a pin on top with kickdown linkage and a spring that pulled forward and didnt use the throttle shaft to change directions causing the load, To sum it up go to a stock configuration and your throttle shaft issues will disappear
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Re: edelbrock throttle shaft's
[Re: scratchnfotraction]
#1395575
03/05/13 03:14 PM
03/05/13 03:14 PM
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Joined: Jan 2003
Posts: 14,610 Not2farfromNashville, TN
Rug_Trucker
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
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With the engine idling and a vac gauge in your face wiggle the shaft up and down, back and forth.
There is bronze bushings you can get. Anyone with a drill press can do the fix. I had a thread which I thought I had save the email to titled "Bush My Shaft." Search here doesn't go back that far.
"The only thing to do for triumph of evil is for good men to do nothing"
"NUNQUAM NON PARATUS!"
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Re: edelbrock throttle shaft's
[Re: scratchnfotraction]
#1395576
03/05/13 04:45 PM
03/05/13 04:45 PM
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Joined: Jan 2003
Posts: 1,255 Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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Quote:
I do agree also a heavy return spring can wear away at the cast alum body but should only become a vac leak.
if it is flooding or has a crack in the main body somewere is the only time gas should be seen at the outside at the shaft.
i would maybe see if edelbrock would warranty it as a defect in materails??
maybe they can refurbish it by replacing the main body only for you.
If the shaft is extra sloppy you could also be seeing a fuel "leak" from working the throttle without the car running. Working the accelerator pump back and forth with no engine vacuum would be spraying fuel down onto the throttle plates and shaft and could flow to the outside of the throttle shaft bore. Otherwise, it would have to be a crack or defect in the casting for fuel to leak from the bowl down into the throttle shaft bores.
A too heavy return spring on either side will contribute to wear. I've only seen a few throttle shafts themselves with wear, usually in cast iron base plates. More often it is the bores, and some carbs especially aftermarket have a very small area that the shaft rides in. I've seen some where this area could be measured in millimeters, no wonder they wear out. The fix is to remove the throttle plates from the shaft, pull it out, and drill out the base plate for a brass bushing with an ID the same as the OD of the shaft long enough for as much of the shaft to contact as possible, and them epoxy it in. Then reinstall the shaft, and out the throttle plate screws in with red loctite to keep them from falling out and down into the intake. It has to be drilled an epoxied just right or it will bind. I've done many a carb this way.
"The happiness of your life depends upon the quality of your thoughts" ~ Roman Emperor Marcus Aurelius
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Re: edelbrock throttle shaft's
[Re: Rug_Trucker]
#1395579
03/05/13 06:06 PM
03/05/13 06:06 PM
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Joined: Jul 2006
Posts: 4,179 California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
"Bush My Shaft."
now THAT post could have a variety of meanings depending on the forum it's posted in!
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Re: edelbrock throttle shaft's
[Re: mickm]
#1395580
03/06/13 10:43 AM
03/06/13 10:43 AM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
Quote:
"Bush My Shaft."
now THAT post could have a variety of meanings depending on the forum it's posted in!
funny how word can have 2 meanings.
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