 engine knock or rattle, search continues... FOUND IT! |
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| malcolm2 |
 May 26 2015, 10:45 AM
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Advanced Member  Group: Members Posts: 2,749 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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Let me ask......
Has anyone had an Alternator that knocks? I have been searching for a random knocking or rattle noise. I thought for sure it was internal, maybe a rod or piston. The sound is random tho. I figured an internal noise would be timed with rotation. Also thought it was from the passenger side. I spent lots of time under the car with a stethoscope this weekend and I would bet a nickel it is not internal. Seems to be the fan, fan housing, or alternator; 'cause with the scope on the fan housing or alt. I can really hear the random knock. On the block, anywhere, all I hear is a faint consistent click of valves thru the case. The fan is torqued and aligned, the belt has proper tension and the alternator was rebuilt 7,000 miles ago prior to my first start. Not sure what all the rebuild included, but I will try to find out. Thinking bearings, maybe? I have had one suggestion.... remove the fan belt and start the car and listen. Can't think of any problems with that. Are there any? Any thoughts or comments very much welcomed. Clark |
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| Mblizzard |
Jun 5 2015, 02:49 PM
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
The air should flow from the impeller housing rubber tube at the back of the alt out the front of the alt.
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Posts in this topic
malcolm2 engine knock or rattle May 26 2015, 10:45 AM
pilothyer It would be perfectly safe to remove the belt from... May 26 2015, 11:17 AM Dave_Darling I've had one or two things fall into the fan o... May 26 2015, 11:35 AM rhodyguy i chased a loosening belt issue and a weird rattle... May 26 2015, 12:56 PM saigon71 Have you done anything with the heat flapper boxes... May 26 2015, 01:16 PM
malcolm2
Have you done anything with the heat flapper boxe... May 26 2015, 07:00 PM rgalla9146 Check the belt itself.
I had a mysterious noise... May 27 2015, 06:23 AM larryM
I have been searching for a random knocking or r... May 30 2015, 10:26 PM malcolm2 I guess I'll take what comes. This post got mo... May 31 2015, 08:42 PM yeahmag Man... If that CHT is accurate on the "hot... Jun 1 2015, 06:13 PM era vulgaris
Man... If that CHT is accurate on the "hot... Jun 1 2015, 06:30 PM malcolm2
Man... If that CHT is accurate on the "hot... Jun 2 2015, 07:37 AM somd914 I have a little piston slap on my 2056 when it... Jun 1 2015, 07:16 PM The Cabinetmaker Sounds like crankshaft walk to me. Jun 2 2015, 04:42 AM somd914
Sounds like crankshaft walk to me.
This is a ne... Jun 2 2015, 05:22 AM malcolm2 I don't discount the suggestions, but wouldn... Jun 2 2015, 07:27 AM McMark Not uncommon for the lower alternator pivot bolt t... Jun 2 2015, 12:46 PM euro911 I watched your videos. My wife's 1.7 had a sim... Jun 2 2015, 02:06 PM malcolm2
I watched your videos. My wife's 1.7 had a si... Jun 2 2015, 08:47 PM worn
I watched your videos. My wife's 1.7 had a s... Jun 3 2015, 12:52 PM euro911 Check with Mark (McMark) ... maybe the high-output... Jun 2 2015, 10:38 PM Mblizzard I have seen this on several rebuilt alternators fo... Jun 3 2015, 04:40 AM malcolm2
Bad news it sucks to fix.
I am getting that ... Jun 3 2015, 07:23 AM euro911 Hmmm ... I have some spare alternators laying arou... Jun 3 2015, 07:25 AM r_towle I would bring it back the same rebuilder.
An alter... Jun 3 2015, 06:46 PM malcolm2 Copy and paste for now:
http://youtu.be/OGZvXqZzK... Jun 4 2015, 06:22 PM Mblizzard Clark I have a couple on the shelf if you need to ... Jun 4 2015, 07:11 PM malcolm2
Clark I have a couple on the shelf if you need to... Jun 5 2015, 09:21 AM somd914 Thanks for posting your findings. Certainly bette... Jun 5 2015, 09:27 AM 914_teener Do you think you can post a picture of the failure... Jun 5 2015, 10:36 AM malcolm2
Do you think you can post a picture of the failur... Jun 5 2015, 02:46 PM malcolm2
The air should flow from the impeller housing rub... Jun 5 2015, 02:52 PM malcolm2 Final video on this subject.... For now!
Tha... Jun 8 2015, 08:45 AM euro911 I try to get someone to help top-side while I... Jun 8 2015, 12:35 PM |
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