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Noise - pls help

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bluebug74 Seriously Crusin Dubber

113 posts · joined Jan 2009 ·

#803229
Hi guys,

I've got a 74 beetle with 1600 motor. The problem is i can hear a howling sound whenever i accelerate (in gear & neutral). The 'woooo' sound seems like it coming frm the left side of the engine & comes in only when i accelerate. I've checked the fan, there's nothing stuck in there & also changed faulty alternator bearings. Have brought the engine down twice now but it's still there.

Pls help as it's very annoying. Any clues??

Thanks.

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#803241
Very difficult to faultfind a problem like this, from your description...fan, but you've been there. I suggest a quick bit of video at the engine with a rev so we all can get a better idea of the noise. You'll get a stack more replies with more info or vid.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

bajachris88 The international telephone dialing code for Antarctica is 6

6,661 posts · joined Apr 2005 ·

#803261
so if u run momentarily without the generator/fan belt, you don't get that noise? or you still do?
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 👍
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta!

bluebug74 Seriously Crusin Dubber

113 posts · joined Jan 2009 ·

#803307
Hi,

Noise is still there with or without the belts. It's louder from inside the bug. Started after i repaired a leak in the external oil cooler hose (oil cooler is mounted inside the rear guard). There's also a small 10" fan for cooling mounted above the oil cooler. And i also did some adjustments on the rear brakes.

The noise becomes louder as i accelerate harder. Will try to check again this evening.

Rgds.

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#803344
Pulley tin rubbing on pulley ???
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

bluebug74 Seriously Crusin Dubber

113 posts · joined Jan 2009 ·

#803357
Thx Matt, just got back frm the w/shop. Syncro the twin baby Weber's (just fitted last week) but couldn't get it right as the timing is very erratic (not consistent). The guy says that it's got something to do with the electronic distributor, faulty & the accelerator cable getting stuck somewhere. Well this is another story.

Going in again this coming Saturday morning to check the noise (even he's not sure what it is) & reply some parts.

Rgds.

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 ·

#803387
YIKES

that is a hard one...

sounds like it makes the noise when the car is moving or not moving

must be the engine???

or fan under the guard hitting something????

LEE
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

lownsneaky Casual Dubber

32 posts · joined Sep 2010 ·

#803835
howls are mainly belt or even some times a leak i had a not so much a howl but a strange noise turned out to be a pin hole in the exhaust