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lmaoufle Samba Member
Joined: June 02, 2015 Posts: 64 Location: France
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Posted: Thu Sep 11, 2025 6:19 am Post subject: Weber IDF rebuild |
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Hi guys,
I am in the process of rebuilding my Weber idf 40 made in spain. I own them for the last 10 years, use them in my 1776, then move to a 2.1 with dell 36.
So the idea is a quick refresh, then tune them for the big motor.
But of course the god of vw decided the plan was too easy, too quick, and not expensive enough
When I stripped them I clearly see that the throttle body plates were not fully closed, it seems my shaft has a twist I tried to remove the plate and gently bend it without removing it.
Here is my results:
Is that good enough? or they should be really really closed?
Should I remove the shaft and try to untwist it in a vice?
Thanks for all your help! |
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Dale M. Samba Member

Joined: April 12, 2006 Posts: 20845 Location: Just a tiny bit west of Yosemite Valley
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Posted: Thu Sep 11, 2025 7:05 am Post subject: Re: Weber IDF rebuild |
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If your attempts to untwist or what ever fail.....
https://www.piercemanifolds.com/GENUINE_WEBER_40_IDF_THROTTLE_SHAFT_REPAIR_KIT_p/pm3721.htm _________________ “Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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Rob Combs Samba Member
Joined: December 30, 2020 Posts: 614 Location: South Bay LA, California
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Posted: Thu Sep 11, 2025 10:20 am Post subject: Re: Weber IDF rebuild |
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Only way you’ll really know is to get it as close as you can, install it, and hit it with a snail gauge. If you can balance the barrels with the balance screws, great. If not, see Dale’s post.
Then, before you put it all back together for real use, try to figure out how they got bent in the first place. Twisting the throttle shaft nuts against the stops? Linkage set up so the carb slams on the full throttle stop?
Once determined, address that too. |
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