 Squeaky 914, Funny Engine noise |
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| needa914 |
 Aug 13 2023, 07:37 AM
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#1
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Newbie  Group: Members Posts: 10 Joined: 4-January 20 From: New York Member No.: 23,799 Region Association: None  |
Any suggestions on the source of this squeak? https://youtube.com/shorts/druxKUMSjIw?feature=share
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| Superhawk996 |
Aug 13 2023, 10:25 AM
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#2
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914 Guru Group: Members Posts: 7,025 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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Sure sounds like it’s off the one carb and affected by how hard you push on the snail. That side also not pulling as much vacuum.
Suspect leak at a gasket that is whistling, squeaking, or whatever you want to call it. Sort of like blowing air over a blade of grass trapped between your thumbs as a kid. Alternately is it the air filter housing loose on top of carb and squeaking and changes pitch when you press the snail harder into the velocity stack loading the air filter housing differently? Those are my best guesses based on the video. |
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| Jack Standz |
Aug 13 2023, 10:31 AM
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#3
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Member Group: Members Posts: 490 Joined: 15-November 19 From: Happy Place (& surrounding area) Member No.: 23,644 Region Association: None
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Wild guess. Is the fan hitting or scraping the aluminum case?
Could be an alternator bearing? Maybe take a long screwdriver or solid length of dowel and go around the engine placing it on the motor while against your ear. Or better use an automotive stethoscope. |
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| needa914 |
Aug 13 2023, 12:28 PM
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#4
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Newbie Group: Members Posts: 10 Joined: 4-January 20 From: New York Member No.: 23,799 Region Association: None |
QUOTE(Superhawk996 @ Aug 13 2023, 10:25 AM)  Sure sounds like it’s off the one carb and affected by how hard you push on the snail. That side also not pulling as much vacuum. Suspect leak at a gasket that is whistling, squeaking, or whatever you want to call it. Sort of like blowing air over a blade of grass trapped between your thumbs as a kid. Alternately is it the air filter housing loose on top of carb and squeaking and changes pitch when you press the snail harder into the velocity stack loading the air filter housing differently? Those are my best guesses based on the video. Thanks!. I did just rebuild the carbs. I'll check and see if tightened everything down. |
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| type2man |
Aug 13 2023, 09:10 PM
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#5
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Member Group: Members Posts: 355 Joined: 3-March 09 From: Miami, Fl Member No.: 10,127 Region Association: South East States |
Intake leak...
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| rfinegan |
Aug 14 2023, 05:17 AM
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#6
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Senior Member Group: Members Posts: 1,073 Joined: 8-February 13 From: NC Member No.: 15,499 Region Association: MidAtlantic Region
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sounds like you have the the air bleeds open on that carb.
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| Front yard mechanic |
Aug 14 2023, 05:41 AM
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#7
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Senior Member Group: Members Posts: 1,321 Joined: 23-July 15 From: New Mexico Member No.: 18,984 Region Association: None
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Squirrel
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| ClayPerrine |
Aug 14 2023, 06:54 AM
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#8
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Life's been good to me so far..... Group: Admin Posts: 16,312 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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Weber 40 IDF carbs are notorious about squeaking if you put the carb directly on the manifold. There is supposed to be an insulator between the carb and the manifold.
Ebay - 40 IDF manifold insulator. Years ago, I had the same noise on my 2.0L 4 cylinder with carbs. I put in the insulators and the noise went away. Hope that helps. Clay |
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| rfinegan |
Aug 14 2023, 07:24 AM
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#9
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Senior Member Group: Members Posts: 1,073 Joined: 8-February 13 From: NC Member No.: 15,499 Region Association: MidAtlantic Region
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GREAT TIP...I’ll give this a try. I was going to get the insulators anyhow as it’s HOT here in NC.
Best -Robert QUOTE(ClayPerrine @ Aug 14 2023, 08:54 AM) Weber 40 IDF carbs are notorious about squeaking if you put the carb directly on the manifold. There is supposed to be an insulator between the carb and the manifold. Ebay - 40 IDF manifold insulator. Years ago, I had the same noise on my 2.0L 4 cylinder with carbs. I put in the insulators and the noise went away. Hope that helps. Clay |
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| r_towle |
Aug 14 2023, 05:51 PM
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#10
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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With the right paint job, I might leave the noise….maybe hang a chipmunk off the rear bumper
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