Pagoda SL Group

W113 Pagoda SL Group => General Discussion => Topic started by: erickmarciano on August 14, 2005, 22:07:03

Title: got a loud whistling noise from the air valve
Post by: erickmarciano on August 14, 2005, 22:07:03

just replaced the chain so I has to reajust the timming and idle and fuel mixture . the car runs great but I have a loud whistling noise from the air valve , the idle is great so is the co% . how can I minimize this noise?
thnaks
Erick

1971 280sl
1962 VW
1954 Allstate vespa
1958 gs150 vespa
1962 gs160 vespa

Title: Re: got a loud whistling noise from the air valve
Post by: hands_aus on August 15, 2005, 04:10:17

Is the noise when the engine is hot or when it is cold (warming up)?

Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL, auto

Title: Re: got a loud whistling noise from the air valve
Post by: erickmarciano on August 15, 2005, 07:35:43

when hot . it is the air adjusting screw near the ventury.

1971 280sl
1962 VW
1954 Allstate vespa
1958 gs150 vespa
1962 gs160 vespa

Title: Re: got a loud whistling noise from the air valve
Post by: enochbell on August 15, 2005, 09:54:08

Are you sure you do not have an air leak somewhere else?  Sounds like the idle air inlet is trying too hard to pull air from in front of the venturi.  And if everything else (idle speed, timing, emissions) checks out OK, your engine may be getting the air it needs from somewhere else.  Check to be certain there is no leak past the butterfly at idle, also check

http://www.mercedesshop.com/shopforum/showthread.php3?t=125019

For diagnostics on air leak issues

Otherwise teach it to whistle something you like, and just enjoy it...

Best,

Greg

'64 230sl, fully sorted out...ooops, spoke too soon