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Join Date: Nov 2004
Location: Kansas City, Missouri
Posts: 197
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Moaning
My '86 Carrera sometimes makes what I would describe as a low-pitched moaning noise at low rpms. It usually occurs from just off idle to around 2000 rpm, and its pitch varies with rpm. I'm thinking (hoping) it is an accessory (alternator or A/C compressor). Anyone had a similar experience who can point me in the right direction?
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11-07-2005, 07:53 AM
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Location: Novato, CA
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No similar experience, but if you can reproduce the noise, then disconnect the belts to AC and alt and run engine for a very short period (< 30 sec) to test your theory,
ianc
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BMW 135i. Nice. Fast. But no 911... "I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79 |
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11-07-2005, 11:58 AM
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Location: Kansas City, Missouri
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Good idea. I'll give it a shot.
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11-07-2005, 12:55 PM
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Location: S.E. Pennsylvania
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Check the AAV.
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The Fox Carrera |
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11-07-2005, 01:23 PM
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Mine has made a similar low pitched howl as you've described, but only right after a cold start up. Goes away after engine is warmed up...
It's done this for 7 years, and 75k miles with no problem...
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'85 Carrera Coupe, Marble Grey #118 JP/R6 '93 Lexus SC400, '00 Ford F-150 '70 911T- 2.7 (SOLD) |
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11-07-2005, 01:32 PM
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In the morning, when you start it up and hear that moan.
Put you finger on the AAV located just above the oil filler neck and feel for vibration and hear a hum. (be careful as the car is running..watch your tie and fingers) Also: Check your fan and Compressor belt for the correct tension and...do you have all 6 shims?
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The Fox Carrera Last edited by kqw; 11-07-2005 at 03:01 PM.. |
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11-07-2005, 02:59 PM
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AAV?
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'85 Carrera Coupe, Marble Grey #118 JP/R6 '93 Lexus SC400, '00 Ford F-150 '70 911T- 2.7 (SOLD) |
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11-07-2005, 03:19 PM
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Location: S.E. Pennsylvania
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Quote:
It's the black, round diaphram located just above the oil filler neck. It has 3 hoses coming from it.
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The Fox Carrera |
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11-07-2005, 03:23 PM
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Location: New Jersey
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I had a strange sound at low rpm's on my SC. After weeks of 'what the hell is that' I replaced the toothed belt with a solid belt. Noise gone!
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Peace, Ron www.ronorlando.net 78SC Targa 3.2 SS, 964 cams, CIS, SSI's,Dansk Own a gun and you can rob a bank , own a bank and you can rob the world. |
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11-08-2005, 12:03 PM
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This sounds like what my 2.4 T does. At low revs, not all the time. Its carbed with no ancilaries like air. Be interested in what you all find.
One thing, the car does no charge and the idiot light is on always. I think this started about the same time the groaning started. Haven't looked at yet as I dirve it so little I just put a trickle charger on. |
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12-23-2005, 09:35 AM
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1984 Other 356 Convertible D Replica 911T
