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#32834 05/08/2004 6:02 PM | Joined: May 2001 Posts: 1,904 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,904 | My Rochester Monojet carb squeals loudly out its throat when idling. If I give it a little gas the squeal goes away. I first thought it was the generator bearings going out.
Is this normal? I have one of those small after-market air cleaners on it. Will a better air cleaner muffle the sound?
Thanks.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
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#32835 05/08/2004 9:24 PM | Joined: Oct 2001 Posts: 194 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2001 Posts: 194 | Most likely the squealing sound is an indication of a vacuum leak on or around the carb. | | |
#32836 05/09/2004 12:22 AM | Joined: Feb 2004 Posts: 110 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2004 Posts: 110 | Afu45 is probably on the right track. Spray some W/D40 around the carb connections and especially around the base. If you have a leak, the engine should pick-up a few rpms and the noise should stop momentarily.
Truck Tinker | | |
#32837 05/10/2004 12:34 AM | Joined: Sep 2001 Posts: 85 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2001 Posts: 85 | I had one of those carbs on a 74 Nova with a 250. I found that if I played with the mixture screw I could get it to squeal. No vacuum leak. I had that car for 10 years, and when ever I messed with the carb I could get it to squeal or whistle by playing with the mixture.
I have heard one or two other carbs do the same thing, I assume it has to do with air passing over/around/thru passages in the carb throat. | | |
#32838 05/10/2004 2:00 AM | | Anonymous Unregistered | | Anonymous Unregistered | The monojet squeals when you set the idle to low.
Boo | | |
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