 Throttle body butterfly EDIT |
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| kroelofsen |
  Sep 30 2019, 08:52 AM
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#1
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Member  Group: Members Posts: 101 Joined: 27-June 19 From: The Netherlands Member No.: 23,255 Region Association: Europe 
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Hello,
I'm working on the engine of my 914 1.8 from 12/73 (L-jetronic). The butterfly of the trottle body is very sticky and I want to replace it. I searched the internet and was not able to find such VW part... Any ideas were to source this part in Europe...? Many thanks. Butterfly partno.: 022.133.141A   Thanks for the replies and shared info... I already took the TB apart and cleaned is. The bearings and seals seem not bad. See below pic what I believe causes the sticking, a ridge has formed over the years. The butterfly sticks on this ridge (IMHO).  So some kind of honing of the bore and a new butterfly...? |
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| brant |
Sep 30 2019, 10:03 AM
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#2
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914 Wizard Group: Members Posts: 12,022 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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how does the machine shop rebuild it?
I have a 2.0 that is sticky... runs fine, but after sitting a couple of days I too have to break it free with my throttle foot after every idle or stop light... then after a little use of 10-20 miles... its good until it sits again in the garage for a week. I could pull it and even pull the butterfly to clean myself. but when they rebuild these I assumed they did shaft bushings/bearings etc. ? |
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| Bartlett 914 |
Sep 30 2019, 12:39 PM
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#3
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Advanced Member Group: Members Posts: 2,218 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
QUOTE(brant @ Sep 30 2019, 11:03 AM)  how does the machine shop rebuild it? I have a 2.0 that is sticky... runs fine, but after sitting a couple of days I too have to break it free with my throttle foot after every idle or stop light... then after a little use of 10-20 miles... its good until it sits again in the garage for a week. I could pull it and even pull the butterfly to clean myself. but when they rebuild these I assumed they did shaft bushings/bearings etc. ? That depends on the amount of wear. The shaft is a steel on aluminum surface without lubrication. For this reason, the shaft bore in the TB wears in an oval condition. This causes the plate to lock in place. After awhile the bore for the plate wears a groove and makes the condition worse. In this case, the large opening needs to be machined and a net plate made to match. I bore the shaft hole and insert a bushing. It is tricky because it needs to be precision and aligned correctly. Not a DIY project. |
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Posts in this topic
kroelofsen Throttle body butterfly EDIT Sep 30 2019, 08:52 AM
bdstone914
Hello,
I'm working on the engine of my 914 1.... Sep 30 2019, 09:04 AM mepstein :agree: I would rebuild the unit. Find someone wit... Sep 30 2019, 09:08 AM dr914@autoatlanta.com typical, the 1.8 only is the only throttle body of... Sep 30 2019, 09:37 AM Bartlett 914 I have had luck rebuilding these Sep 30 2019, 10:01 AM sholman5 Check the vendors section. Whip618 does rebuilds. Sep 30 2019, 10:22 AM
brant
Check the vendors section. Whip618 does rebuilds.... Sep 30 2019, 10:41 AM jim_hoyland Interesting: my original TB never stuck, when I re... Sep 30 2019, 11:45 AM sholman5 Stronger return spring. Sep 30 2019, 12:03 PM rjames A couple of threads containing mention of someone ... Sep 30 2019, 01:14 PM |
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