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| Moderated by: Greg Fletcher |
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| Pack of Angry Mice under the Hood | Rate Topic |
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| Posted: 08-19-2010 04:05 pm |
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1st Post |
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SpeedyMitch Member 
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My 73 has what sounds like a pack of angry mice under the hood. I'm hoping somebody can help me identify the sound so I can fix it prior to driving to Grass Valley. The sound starts at just over 1k rpm until about 3k rpm. The sound does not occur when there is no load (i.e. in the driveway). I'm thinking either water pump or timing belt tensioner bearings. Any insight would be greatly appreciated. Mitch
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| Posted: 08-19-2010 04:20 pm |
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2nd Post |
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JodyKerr Member 
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My vote would go with the items that act differently under load. A bad water pump will generally make horrible noises in the driveway as well as under load. Are you sure the mice are at the front of the vehicle, and not somewhere further back in the driveline? (e.g. throw-out bearing, ujoints, etc). Commonly, those types of noises do not appear sitting in the driveway, but do when you're driving. If you're brave, and you have an assistant, what I normally do is remove the hood. Prop myself spread eagled over the motor, and then have someone else drive it really fast so I can do loaded diagnostics. (For the sake of those reading at home, that was a joke. >:) Jody
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| Posted: 08-20-2010 03:41 am |
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3rd Post |
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Jensen Healey Super Moderator 
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Nice image Jody! Hi Mitch, I think you're on the right track. Adjust the belt tension and see if it changes. Bearings are cheap compared to the consequences. Are you guys going to make the Nationals? I'll be there Saturday and Sunday due to work issues. Kurt
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| Posted: 08-20-2010 05:01 am |
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4th Post |
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SpeedyMitch Member
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> Adjust the belt tension and see if it changes Good idea. I was going to spray some light penetrating oil on the bearing but I'm not sure if spraying it on the outside of the bearing would allow it to penetrate enough to change the noise. > Are you guys going to make the Nationals? Yes. However I'm likely to drive up early on Saturday and drive back after dinner. I'm not sure the Jensen is up for the trip and my car *looks terrible* as I have had no time for working on aesthetics since I dragged it home.
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| Posted: 08-20-2010 02:06 pm |
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5th Post |
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Brett Gibson JH5 20497 Member
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Mitch, even if it is not the tensioner bearing thats your issue, it sounds like you may just want to change it anyhow if you dont know it's age, after all you have a lot riding on an inexpensive bearing. my 2 cents Brett
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| Posted: 08-20-2010 07:04 pm |
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6th Post |
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SpeedyMitch Member
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Are there any special tools needed to change the tensioner bearing?
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| Posted: 08-20-2010 07:41 pm |
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7th Post |
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Brett Gibson JH5 20497 Member
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Depends which one you have, late model bearing nothing special, early ones use a oddball wrench to adjust. Brett
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