1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

rear rotor heating up really fast

Thread Tools
 
Search this Thread
 
Old 04-12-04, 07:28 PM
  #1  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
rear rotor heating up really fast

well, the title says it, my rear rotor header get cherry red hot before it even heats up to normal operating temp. i just filled the radiator with cooland, and reinsalled the oil pan which is leaking fron the plug i think. if that makes any difference. ithas also started running pretty rich.
Old 04-12-04, 08:04 PM
  #2  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
anyone?
Old 04-12-04, 08:18 PM
  #3  
Senior Member

 
Lotus00's Avatar
 
Join Date: Jun 2002
Location: Minnesota
Posts: 558
Likes: 0
Received 0 Likes on 0 Posts
well if its running really rich, then thats why your header is getting so hot. a LOT of unburned fuel is being burnt right in your header, causing it to heat up.
Old 04-12-04, 08:20 PM
  #4  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
could it only be running rich in the rear rotor?
Old 04-12-04, 08:22 PM
  #5  
Senior Member

 
Lotus00's Avatar
 
Join Date: Jun 2002
Location: Minnesota
Posts: 558
Likes: 0
Received 0 Likes on 0 Posts
If something is wrong with your carb I guess it could. I cant think of any other reason your header would be getting that hot.
Old 04-12-04, 08:26 PM
  #6  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
hmmm, thanks. ill have the guy who tuned it take a look
Old 04-12-04, 09:24 PM
  #7  
love the braaaap

 
85rotarypower's Avatar
 
Join Date: Jul 2003
Location: Bognor, Ontario
Posts: 3,771
Likes: 0
Received 4 Likes on 4 Posts
Definately running rich on the rear rotor. It is possible to run rich on just one rotor. That would mean that your carb is totally screwed. The orfice in the primary jet on the rear primary barrel could have opened up some how (can't seem how but its the best I can think of), causing more fuel to be sucked in and causing the rear rotor to run rich. This is really the only thing I can think of. I know this is possible though because it happened to me. My carb looked ok when i rebuilt it, but I ran it for the first time the other day and the front rotor is getting WAY too much fuel. If you look down the carb on my car you can actually see fuel dripping from the venturi. There is just so much there that it doesn't mix with the air and drops raw fuel into the engine. Needless to say its flooding itself out, and I am getting a different carb because as it is the carb is enough of a frankenstein from when I rebuilt it. So, new used carb is coming in my very near future (probably get one this weekend).
Old 04-12-04, 09:42 PM
  #8  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
its a not so old dellorto
Old 04-12-04, 09:44 PM
  #9  
love the braaaap

 
85rotarypower's Avatar
 
Join Date: Jul 2003
Location: Bognor, Ontario
Posts: 3,771
Likes: 0
Received 4 Likes on 4 Posts
Forget what i said then. I didn't know you had a dellorto. In that case, you could just have the wrong jet size in the rear barrel.
Old 04-12-04, 09:47 PM
  #10  
I can has a Hemi? Yes...

iTrader: (2)
 
Directfreak's Avatar
 
Join Date: Dec 2001
Location: 3OH5
Posts: 9,371
Likes: 0
Received 4 Likes on 3 Posts
Check the spark plugs - See if the rear rotor is running richer than the front, by the color.
Old 04-12-04, 09:51 PM
  #11  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
the car was running perfect after the rejet...now its...
Old 04-12-04, 09:55 PM
  #12  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
also, is it safe to drive it in this condition? the air fuel ration is like this


-red rich
-red rich -its running here
-yellow rich
-yellow rich
-green rich
-green lean
-yellow lean
-yellow lean
-red lean
-red lean
Old 04-12-04, 10:01 PM
  #13  
love the braaaap

 
85rotarypower's Avatar
 
Join Date: Jul 2003
Location: Bognor, Ontario
Posts: 3,771
Likes: 0
Received 4 Likes on 4 Posts
I wouldn't drive it too much. With that header getting so hot, you could warp the mounting flange and make an exhaust leak.
Old 04-12-04, 10:07 PM
  #14  
You can choose this?

Thread Starter
 
lemonade's Avatar
 
Join Date: Oct 2003
Location: hoosier state
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
drive it to my mechanic?
Old 04-12-04, 10:14 PM
  #15  
love the braaaap

 
85rotarypower's Avatar
 
Join Date: Jul 2003
Location: Bognor, Ontario
Posts: 3,771
Likes: 0
Received 4 Likes on 4 Posts
Thats what I would do if I couldn't fix it. It sounds too complicated to me. Something is just not right with your carb.
Old 04-12-04, 11:30 PM
  #16  
Newb

 
Swolbynos's Avatar
 
Join Date: Jun 2003
Location: Yukon, OK
Posts: 928
Received 0 Likes on 0 Posts
retarded timing on the rear rotor? as in bent distributer rotor.

just a guess, but get the carb checked out first.
Old 04-12-04, 11:49 PM
  #17  
Registered pimp

 
rxseven07's Avatar
 
Join Date: Jan 2004
Location: nashville
Posts: 1,286
Likes: 0
Received 0 Likes on 0 Posts
hmm, maybe your cooling passages could be clogged up or ur not getting oil into your rear rotor. just a guess though.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
josef 91 vert
2nd Generation Specific (1986-1992)
23
09-03-15 11:20 AM
Marty RE
New Member RX-7 Technical
0
08-13-15 11:19 AM



Quick Reply: rear rotor heating up really fast



All times are GMT -5. The time now is 04:09 PM.