Home 
Home Search search Menu menu Not logged in - Login | Register
> Jensen Healey & Jensen GT Tech > Engine & Transmission > Pack of Angry Mice under the Hood

 Moderated by: Greg Fletcher
New Topic Reply Printer Friendly
Pack of Angry Mice under the Hood  Rate Topic 
AuthorPost
 Posted: 08-19-2010 03:05 pm
  PM Quote Reply
1st Post
SpeedyMitch
Member


Joined: 12-17-2009
Location: Hailey, Idaho USA
Posts: 83
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 08-19-2010 03:20 pm
  PM Quote Reply
2nd Post
JodyKerr
Member


Joined: 05-15-2006
Location: Tempe, Arizona USA
Posts: 217
Status: 
Offline
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

Back To Top PM Quote Reply

 Posted: 08-20-2010 02:41 am
  PM Quote Reply
3rd Post
Jensen Healey
Super Moderator


Joined: 03-11-2005
Location: San Anselmo, California USA
Posts: 976
Status: 
Offline
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

 

 

Back To Top PM Quote Reply  

 Posted: 08-20-2010 04:01 am
  PM Quote Reply
4th Post
SpeedyMitch
Member


Joined: 12-17-2009
Location: Hailey, Idaho USA
Posts: 83
Status: 
Offline
> 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.

Back To Top PM Quote Reply

 Posted: 08-20-2010 01:06 pm
  PM Quote Reply
5th Post
Brett Gibson JH5 20497
Member
 

Joined: 03-17-2005
Location: Hilton, New York USA
Posts: 712
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 08-20-2010 06:04 pm
  PM Quote Reply
6th Post
SpeedyMitch
Member


Joined: 12-17-2009
Location: Hailey, Idaho USA
Posts: 83
Status: 
Offline
Are there any special tools needed to change the tensioner bearing?

Back To Top PM Quote Reply

 Posted: 08-20-2010 06:41 pm
  PM Quote Reply
7th Post
Brett Gibson JH5 20497
Member
 

Joined: 03-17-2005
Location: Hilton, New York USA
Posts: 712
Status: 
Offline
Depends which one you have, late model  bearing nothing special, early ones use a oddball wrench to adjust.

Brett

Back To Top PM Quote Reply  

Current time is 08:22 pm  
> Jensen Healey & Jensen GT Tech > Engine & Transmission > Pack of Angry Mice under the Hood Top




UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems