 First stop on the diagnosis train: asking the forum., 1911 sounds like marbles in a tin can. |
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| Optimusglen |
 May 15 2019, 11:56 PM
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Senior Member  Group: Members Posts: 908 Joined: 26-February 16 From: Minneapolis Member No.: 19,709 Region Association: Upper MidWest 
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A recent occurrence, I'm getting a pretty loud rattle that sounds like marbles swirling around the bottom of a tin can. Everything else seems fine, power etc. Hear it while in neutral and idling and also while driving in gear. It's drown out by wind noise the faster you go.
Engine is a 1.7 punched up to 1911 on dual Weber 40's. Heat exchangers stripped to bare headers, new muffler. Oil pressure and cylinder head temp both normal. |
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| Optimusglen |
May 25 2019, 09:50 PM
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#2
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Senior Member Group: Members Posts: 908 Joined: 26-February 16 From: Minneapolis Member No.: 19,709 Region Association: Upper MidWest
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Fun stuff. And not fun stuff.
Ordered a new alternator, just the regular 55w one. Spent the afternoon swapping it in. In the process of pulling the old one out an ACORN fell out of it. Screwy. But, the pulley was loose even though the bolt was tightened down, the key was a bit mangled and the slot in the old alternator shaft was even more mangled so it was good I had a new one. Got everything buttoned up, went to connect the battery and suddenly there's billowing smoke. :[ Pull the battery cable and push it out into the driveway. Later climbed under and the alt harness is melty goo. Guessing a short to the alt back plate? New harness from 914Rubber on order. Anyone know if that type of thing would fry other components? Oh, and I installed a new alt cooling snorkle. The spring clip unsprung into the fan housing. Anyone with a good method of removing it? |
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| mcswiggs |
May 26 2019, 01:10 AM
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#3
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Newbie Group: Members Posts: 22 Joined: 31-January 18 From: London, UK Member No.: 21,845 Region Association: England |
Take the back plate off and check the length of the terminal studs and how close they are to that back plate when assembled. I know this is a problem on new alternators sold in the UK to bus owners. Good luck. QUOTE(Optimusglen @ May 25 2019, 09:50 PM)  Fun stuff. And not fun stuff. Ordered a new alternator, just the regular 55w one. Spent the afternoon swapping it in. In the process of pulling the old one out an ACORN fell out of it. Screwy. But, the pulley was loose even though the bolt was tightened down, the key was a bit mangled and the slot in the old alternator shaft was even more mangled so it was good I had a new one. Got everything buttoned up, went to connect the battery and suddenly there's billowing smoke. :[ Pull the battery cable and push it out into the driveway. Later climbed under and the alt harness is melty goo. Guessing a short to the alt back plate? New harness from 914Rubber on order. Anyone know if that type of thing would fry other components? Oh, and I installed a new alt cooling snorkle. The spring clip unsprung into the fan housing. Anyone with a good method of removing it? (IMG:style_emoticons/default/dry.gif) |
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Posts in this topic
Optimusglen First stop on the diagnosis train: asking the forum. May 15 2019, 11:56 PM
falcor75 Throwout bearing? Does it go away when you depress... May 16 2019, 12:30 AM jasons Did something like a loose nut find it's way i... May 16 2019, 06:09 AM ejm Could be the alternator bearings. Pull the belt an... May 16 2019, 07:40 AM rhodyguy :agree: May 16 2019, 08:08 AM Optimusglen I'm leaning alternator bearings... I took this... May 16 2019, 08:59 AM injunmort sounds like fan came loose from hub. try tightenin... May 16 2019, 11:02 AM
VaccaRabite
sounds like fan came loose from hub. try tighteni... May 16 2019, 11:10 AM Optimusglen Fan is solid on the hub, that was the first think ... May 16 2019, 11:32 AM tejon007 Sounds like the alternator needs some attention...... May 16 2019, 01:56 PM Dave_Darling Pull the alternator belt and see if the noise stop... May 16 2019, 04:57 PM michael7810 Almost sounds like a bad exhaust leak...but my hea... May 16 2019, 04:57 PM Optimusglen Parked it until I can dive into it more. The pulle... May 17 2019, 07:56 AM Mark Henry Did you put 911 valve adjusters on it? Some are re... May 26 2019, 05:31 PM Optimusglen No 911 valve adjusters.
Back onto the alternator ... May 28 2019, 08:18 AM Optimusglen Update, swapped on alternator #3 on with a new har... May 30 2019, 03:57 PM |
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