displaying posts 1 to 4 of 4

Author Subject: Alternator goosed?
clen666

Seasoned Pro

Location: Co. Durham

Registered: 12 Feb 2009

Posts: 2,401

Status: Offline

Post #1
I'm getting a squeal from my alternator, I'm guessing it's the bearings.

I've measured the voltage across the battery when running and it's a steady 14v, but when I increase the electrical load when idling the revs drop quite a bit and nearly stalls, but voltage returns to 14v no problem.

Is it knackered bearings putting added strain on the engine causing the revs to drop so much, or another issue?

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Posted 27th Feb 2013 at 22:24
bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

Status: Offline

Post #2
14.7 normaly when car is running dude ?

Posted 27th Feb 2013 at 23:05
daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

Status: Offline

Post #3
Sure it's not a knackered or loose belt that's slipping?

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 28th Feb 2013 at 08:04
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #4
Remove the aux belt and manually spin the alternator by hand. It should be smooth and free as you like to turn. If it's difficult to turn, feels rough or makes abnormal noises then it's probably knackered. If not then, it could be a damaged belt or another bearing on that belt circuit which is causing the noise and seizing up placing excess load on the system so when you place more electrical load on the alternator, the whole system struggles to turn.

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 28th Feb 2013 at 08:44

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