280ZX (S130) Forums Dedicated to 79-83 ZCars

ACK HELP! Timing chain? Whirring metal on metal grindy sound.

Thread Tools
 
Search this Thread
 
Old 04-01-2011 | 02:45 PM
  #1  
GTH's Avatar
GTH
Thread Starter
Registered User
 
Joined: Oct 2009
Posts: 112
ACK HELP! Timing chain? Whirring metal on metal grindy sound.

OK, so this issue is not 100% consistent, sometimes if i stop quickly or accel quickly it seems to change/alleviate the issue.

It sounds as if something is rubbing against something else, its coming from the front of the motor under the valve cover. I guess i could pull it, i need a valve adjustment anyhow. but im not sure im mechanically inclined enough to do this on my own. this is more then a few coolant leaks or vacuum hoses.
Old 04-01-2011 | 06:27 PM
  #2  
NismoPick's Avatar
The Good Twin
 
Joined: Aug 2005
Posts: 20,639
From: Wild Wild West, UTAH!
Dunno what to tell you other than start w/ pulling the valve cover and inspect... Detailed info in the FSM / Haynes manual.
Old 05-06-2011 | 07:03 PM
  #3  
GTH's Avatar
GTH
Thread Starter
Registered User
 
Joined: Oct 2009
Posts: 112
Turns out it was a tensioning pully for the belt that also powers the power steering pump, or that just failed at the same time. anyhow, the belt is slipping, the pully is locked up, i need to replace it. Its the pully on the top front of the motor. dont know what its called.
Old 05-06-2011 | 07:32 PM
  #4  
GTH's Avatar
GTH
Thread Starter
Registered User
 
Joined: Oct 2009
Posts: 112
Heh, this isnt good

Name:  204313_1914878272284_1251766945_31694117_3827654_o.jpg
Views: 98
Size:  62.8 KB

now where to find a replacement

Edit: OH Sweet, they are like 8-12 bucks.
Old 05-07-2011 | 08:40 AM
  #5  
WanganDevilZ's Avatar
The Emblem Thief y0!
 
Joined: Aug 2009
Posts: 947
From: Tulsa, Ok
Originally Posted by GTH
Uhh, yeah, that's not good =P

Good thing you caught that.
Old 05-07-2011 | 02:58 PM
  #6  
FricFrac's Avatar
Mr Z++ Wiki
 
Joined: Sep 2009
Posts: 2,195
From: Victoria, BC
Just put a new bearing in it. I just replaced one
Old 05-08-2011 | 03:57 PM
  #7  
GTH's Avatar
GTH
Thread Starter
Registered User
 
Joined: Oct 2009
Posts: 112
So the inside "spacer" Does that need to come out from the old bearing? or does that come with the new one? Im lost here. that and no one carries this thing :\

Name:  050811155940.jpg
Views: 115
Size:  75.1 KB
Name:  050811155925.jpg
Views: 84
Size:  79.0 KB
Name:  050811155817.jpg
Views: 88
Size:  65.7 KB

Last edited by GTH; 05-08-2011 at 04:08 PM.
Old 05-08-2011 | 07:49 PM
  #8  
FricFrac's Avatar
Mr Z++ Wiki
 
Joined: Sep 2009
Posts: 2,195
From: Victoria, BC
Yup. Just press it out and put it in the new bearing....
Old 05-08-2011 | 09:03 PM
  #9  
GTH's Avatar
GTH
Thread Starter
Registered User
 
Joined: Oct 2009
Posts: 112
Now ive read that the tolerences are very very tight on these. So much so that i can damage the bearing by not only pushing the spacer in but also but simply pressing it into the pulley as well.....Any tips?
Old 05-09-2011 | 08:29 PM
  #10  
FricFrac's Avatar
Mr Z++ Wiki
 
Joined: Sep 2009
Posts: 2,195
From: Victoria, BC
If it's clean and you have the right bearing it should be all good. Mine worked out perfectly and I've got zero mechanical background....
Old 05-12-2011 | 04:23 PM
  #11  
Switchtr3's Avatar
Registered User
 
Joined: Jul 2009
Posts: 172
From: NH, formerly CT
Exact same thing happened to mine, twice. Made the most horrible noise the first time it went I thought something much more serious was up and pulled over all quick. Second time it happened I took the pulley off and went with out a power steering belt for a while. Now I never even bothered to put the PS pump back on after my engine swap and I'm planning on converting to a manual steering rack from a 79 when I get the time.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
alex90292
300ZX (Z31) Forums
4
03-28-2014 06:33 AM
Black_Zephyr
280ZX (S130) Forums
8
04-24-2012 07:47 PM
thxone
280ZX (S130) Forums
13
06-06-2006 07:44 AM
SteveGee
280ZX Appearance Exterior, Interior
1
09-03-2003 09:55 PM
ZorroZ
240Z, 260Z, 280Z (S30) Forums
5
04-18-2003 05:12 AM



Quick Reply: ACK HELP! Timing chain? Whirring metal on metal grindy sound.



All times are GMT -7. The time now is 11:18 AM.