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Author Topic: sucking sound  (Read 4028 times)

Offline willie

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sucking sound
« on: April 19, 2011, 01:46:43 PM »
I just rebuilt a rochester 4bbl no17057253 below  that 1677ap and installed it last week. I used your book and did the minimum make the carb better such as drilling out the idle tubes and the adjustment ports sounds like a large vacum leak.It will not idle it does not have any idle bypass air ports.Idont know where to look propane shows no air leaks.I installed a cadilac carb from a junkyard it has no sucking sound and idles ok but it is one nasty looking carb.I want to put my shiney carb back on I dont know where to begin,,other than dissasemble and look for errors.please help guide me or bless a carb rock and mail it to me. ???
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Offline garybohannon

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Re: sucking sound
« Reply #1 on: April 20, 2011, 06:40:04 AM »
 I did a recipe job on my  Buick carb and got a sucking sound and no idle.
After a lot of fruitles effort, I finally decided to remove the plywood open spacer and add a hard phenaulic 4 hole spacer.
 My guess was that the carb was seeping air internally and the 4 hole spacer would support the bottom of the carb and sandwitch the gaskets with some squeeze from the bottom up. The carb had been unwarped, but there was possibily some  sag  in it somewhere until the 4 hole spacer gave it a solid foundation.
 












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Offline willie

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Re: sucking sound
« Reply #2 on: April 20, 2011, 08:57:08 AM »
Thanks gary, I will try to put it back on tomorrow with a different gasket.I will post results soon. :)
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Offline Schurkey

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Re: sucking sound
« Reply #3 on: April 20, 2011, 11:07:17 AM »
Missing hot idle compensator???
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Offline Cliff Ruggles

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Re: sucking sound
« Reply #4 on: April 21, 2011, 03:19:18 AM »
Did you get one of our HP kits?  They come with the stock gasket, and the .250" thick 4 hole gasket.  The thick gasket will seal up that carb on any intake designed for a spread bore carburetor.....Cliff
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Offline willie

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Re: sucking sound
« Reply #5 on: April 21, 2011, 03:30:43 AM »
no cliff I used an aftermarket cheap kit,I got your book and was  experementing with the basic procedures.I will get a hp kit and the jet well sealing stuff after I get over my back problems. :)
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Offline Cliff Ruggles

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Re: sucking sound
« Reply #6 on: April 24, 2011, 07:02:15 AM »
You will find all the parts superior to over the counter stuff.  We also include a thicker gasket if/as needed to go between the main casting and airhorn, in addition to the stock carb to base gasket, and the thick 1/4" gasket as well.....Cliff
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Offline willie

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Re: sucking sound
« Reply #7 on: April 24, 2011, 07:52:59 PM »
thank you cliff. :)
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