| [ Total Views: 858 | Total Replies: 19 | Thread Id: 85243 ] |
|
|
 Lams
Wolfsburg Wizard
Posts: 536
Threads: 66
Registered: September 4th, 2004
Member Is Offline
Location: Brisbane - Mt Gravatt
Theme: UltimaBB Pro Blue ( Default )
Mood: need a laugh
|
| posted on August 9th, 2010 at 08:44 AM |
|
|
engine whistling
Hi all,
My little beetle with a 1200 has developed some sort of whistle, and the pitch is proportional to the amount of throttle I give it.
The whistle is there regardless of revs or road speed. I took the air filter off and it is still there.
Seems to be coming from the carby. Any idea what it could be? Should I be concerned?
Thank you
Alex
speeding is bad!
relax - god's in charge
 |
|
|
Smiley
A.k.a.: Daniel Stephens
Veteran Volks Folk
Posts: 2125
Threads: 110
Registered: October 29th, 2008
Member Is Offline
Location: Yeppoon, Central Queensland
Theme: UltimaBB Pro Blue
Mood: Synchro'd
|
| posted on August 9th, 2010 at 09:05 AM |
|
|
It's probably the generator bearings.
Or could be the fan rubbing on the fanhousing, but that's more of a scraping noise.
Smiley 
If you said I was a Volkswagen man, you'd be right.
|
|
|
Joel
Scirocco Rare
Now containing 100% E-Wang
Posts: 9368
Threads: 211
Registered: February 14th, 2006
Member Is Offline
Location: Northern Rivers NSW
Theme: UltimaBB Pro Purple
Mood: Tact Level 0.00
|
| posted on August 9th, 2010 at 09:50 AM |
|
|
An air leak between the carby and manifold will do that too.
One of the bolts on dads weber keeps coming loose and doing the same, when it sounds like a bunch of birds in the aircleaner when he revs it we know
it's come loose again
|
|
|
68AutoBug
A.k.a.: Lee Noonan
Aircooled Master
Beetle Restorer - Experience over 138% - YIKES --
Posts: 11654
Threads: 449
Registered: August 31st, 2002
Member Is Offline
Location: SCONE in UPPER HUNTER VALLEY NSW
Theme: UltimaBB Pro Yellow
Mood: Really Mentally Ill - all of the time -
|
| posted on August 9th, 2010 at 04:29 PM |
|
|
| Quote: | Originally
posted by Lams
Hi all,
My little beetle with a 1200 has developed some sort of whistle, and the pitch is proportional to the amount of throttle I give it.
The whistle is there regardless of revs or road speed. I took the air filter off and it is still there.
Seems to be coming from the carby. Any idea what it could be? Should I be concerned?
Thank you
Alex
|
try lubricating all the linkages with a drop of oil..
[this should happen every oil change]
if the whistle stops You know you have a worn carby...
all shafts etc should be lubricated to stop wear..
or as Joel suggests
an air leak....
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
|
|
|
Sides
A.k.a.: Dave Sidery
Veteran Volks Folk
Posts: 2220
Threads: 59
Registered: May 20th, 2007
Member Is Offline
Location: Brisbane
Theme: UltimaBB Pro Blue
Mood: Need... more... shed... time...
|
| posted on August 9th, 2010 at 06:30 PM |
|
|
My money is on an air leak either at manifold to head or manifold to carb.
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI - http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners |
|
|
beetleboyjeff
A.k.a.: Jeff Walsh
Custom Title Time!
Posts: 1779
Threads: 40
Registered: February 13th, 2009
Member Is Offline
Location: Port Macquarie
Theme: UltimaBB Pro Blue ( Default )
Mood: Drive bugs hard
|
| posted on August 9th, 2010 at 08:34 PM |
|
|
I think it is just whistling because ......................... it doesn't know the words. lol lol lol
From your ole' mate Jeff
|
|
|
71-BEETLE-SEDAN
Custom Title Time!
AKA Josh
Posts: 1058
Threads: 108
Registered: March 25th, 2009
Member Is Offline
Location: Mittagong NSW
Theme: UltimaBB Pro White
|
| posted on August 9th, 2010 at 08:42 PM |
|
|
it could be the fan on the housing, im preety certain mine does the same, it sounds good and i like it.
|
|
|
Lams
Wolfsburg Wizard
Posts: 536
Threads: 66
Registered: September 4th, 2004
Member Is Offline
Location: Brisbane - Mt Gravatt
Theme: UltimaBB Pro Blue ( Default )
Mood: need a laugh
|
| posted on August 10th, 2010 at 09:22 AM |
|
|
thanks for your responses
would you expect carby -> manifold to increase in pitch with revs?
The pitch of the whistle is only changed by the amount of (part) throttle I give.
I will have a look this weekend
speeding is bad!
relax - god's in charge
|
|
|
Sides
A.k.a.: Dave Sidery
Veteran Volks Folk
Posts: 2220
Threads: 59
Registered: May 20th, 2007
Member Is Offline
Location: Brisbane
Theme: UltimaBB Pro Blue
Mood: Need... more... shed... time...
|
| posted on August 10th, 2010 at 10:22 AM |
|
|
If it varies noticable between part throttle and full throttle, then yup - air leak between the carb and the manifold.
One good way to prove it is to get a can of carb cleaner or similar, and while the engine is running spray around where the gasket is... if the engine
revs change (pick up) then you've found your leak.
Good luck !!!
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI - http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners |
|
|
 matberry
Super Moderator
Go hard or go home
Posts: 8114
Threads: 134
Registered: March 7th, 2006
Member Is Offline
Location: Cooroy Qld
Theme: UltimaBB Pro Blue
Mood: enjoying waving at all my Kombi buddies from my T3
|
| posted on August 10th, 2010 at 10:47 AM |
|
|
Air leak at carb is usually dependant on vacuum. I'm thinking maybe fan?? They can whistle when some junk gets caught in the blades. Just stick your
hand in the fan and check every blade is clear......with the engine off of course  .
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
 |
|
|
ancientbugger
Custom Title Time!
Posts: 1986
Threads: 191
Registered: March 24th, 2004
Member Is Offline
Location: sunshine coast
Theme: UltimaBB Pro Yellow
|
| posted on August 10th, 2010 at 10:04 PM |
|
|
Good advice Matt
|
|
|
66brm
Seriously Crusin Dubber
Posts: 140
Threads: 4
Registered: November 13th, 2009
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on August 12th, 2010 at 11:56 AM |
|
|
I had the same problem with a car I was working on, it ended up being the gasket between the carb and manifold, the air flowing past made the gasket
vibrate which made the noise. The manifold had been gouged by the po and that created the gap between carb and manifold. Also created tuning issues
with it running lean etc
|
|
|
jsheppard64
Officially Full-On Dubber
Posts: 323
Threads: 19
Registered: March 23rd, 2008
Member Is Offline
Location: Shibukawa, Gunma
Theme: UltimaBB Psyche Red
Mood: Akiba-Spec
|
| posted on August 13th, 2010 at 05:01 AM |
|
|
stick a 17mm socket on a drill
take the belts off put it in and slowly rev the drill it make sure u got the right rotation
once full throttle remove the drill and listen
if u don't have some sort of drive converter find a say 2" long m12 with 17mm hex head
and lock it in with the nut so that u have the thread side pointing out the back of socket
|
|
|
donn
Wolfsburg Elder
Posts: 3515
Threads: 428
Registered: November 30th, 2005
Member Is Offline
Location: NEWCASTLE NSW
Theme: UltimaBB Pro Blue
Mood: LAID BACK AND CONFUSED
|
| posted on August 13th, 2010 at 08:51 AM |
|
|
| Quote: | Originally
posted by jsheppard64
if u don't have some sort of drive converter find a say 2" long m12 with 17mm hex head
and lock it in with the nut so that u have the thread side pointing out the back of socket
|
Please explain
I dream of a day when a chicken can cross a road without being asked for it's motive!
|
|
|
matberry
Super Moderator
Go hard or go home
Posts: 8114
Threads: 134
Registered: March 7th, 2006
Member Is Offline
Location: Cooroy Qld
Theme: UltimaBB Pro Blue
Mood: enjoying waving at all my Kombi buddies from my T3
|
| posted on August 13th, 2010 at 09:15 AM |
|
|
Please explain....what are you trying to do Mr Sheppard, drive the engine with a drill to hear the noise? Doesn't make sense to me, the engine would
need all the plugs out to achieve that, then there's no vacuum to make the inlet noise.....
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
|
|
|
Sides
A.k.a.: Dave Sidery
Veteran Volks Folk
Posts: 2220
Threads: 59
Registered: May 20th, 2007
Member Is Offline
Location: Brisbane
Theme: UltimaBB Pro Blue
Mood: Need... more... shed... time...
|
| posted on August 13th, 2010 at 09:19 AM |
|
|
Does he mean using the drill to drive the fan while getting the engine up to speed, then take the drill out so the fan stops and all you hear is
engine ???
The engine doesn't need to be running long to rule out the fan/gen/alt... maybe 30 seconds all up... and I doubt an engine would cook itself in just
that short time...
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI - http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners |
|
|
Sides
A.k.a.: Dave Sidery
Veteran Volks Folk
Posts: 2220
Threads: 59
Registered: May 20th, 2007
Member Is Offline
Location: Brisbane
Theme: UltimaBB Pro Blue
Mood: Need... more... shed... time...
|
| posted on August 13th, 2010 at 09:22 AM |
|
|
| Quote: | Originally
posted by Lams
The pitch of the whistle is only changed by the amount of (part) throttle I give.
|
btw - agree with you totally Matt about vacuum... just this sentence of Alex's made me think it was vacuum rather than rpm related...
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI - http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners |
|
|
jsheppard64
Officially Full-On Dubber
Posts: 323
Threads: 19
Registered: March 23rd, 2008
Member Is Offline
Location: Shibukawa, Gunma
Theme: UltimaBB Psyche Red
Mood: Akiba-Spec
|
| posted on August 13th, 2010 at 11:38 PM |
|
|
not driving the engine by the drill
but take the belt off and just drive generator (and fan) with a drill to see if it was the fan making noise
with engine off
dw... it's a stupid idea anyway
|
|
|
VDU.88A
Officially Full-On Dubber
Posts: 306
Threads: 81
Registered: June 28th, 2003
Member Is Offline
Location: Newcastle
Theme: UltimaBB Pro Blue ( Default )
|
| posted on August 14th, 2010 at 07:58 PM |
|
|
I would be looking for a air leak in the manifold some where maybe under carby maybe at ends of manifold. Take belt off run the engine for a short
time to eliminate the belt.
I had an annoying whistle noise in my engine too at valla turned out the inlet manifold on the left hand carby had cracked in it( broken on the
mounting lug) some aluminium welding fixed it up. As suggested grab some carby cleaner and spray it near the carby gasket and throttle shaft.
Good luck with it
|
|
|
Newt
Wolfsburg Wizard
Posts: 478
Threads: 82
Registered: March 1st, 2008
Member Is Offline
Location: Perth
Theme: UltimaBB Pro Grey
Mood: Born 10 minutes late & never caught up.
|
| posted on August 15th, 2010 at 11:51 PM |
|
|
I once had negative presssure in the case when i over vented the case to the intake system and it whistled lots as it sucked air into the case through
a leak in the oil cap (could have been a be a poor seal anywhere though)
Newt
It is as it is - If you didnt enjoy today, you've missed the opportunity.
|
|
|
