Single Turbo Discussion Area for discussing single turbo RX-7's.

Hmmm , What Do You Guys Think.

Old 12-22-2003, 06:10 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Mar 2003
Posts: 410
Thumbs up

I already have my suspicions , but I want to know what you guys think . here's what happens , when I rev. the motor past about 6000 rpm when the car is at a standstill or moving and let off the gas , then go back on I get a fairly large amount of blue smoke from my exhaust and over time I actually loose oil from my sump. I suspected the turbo and had it checked and rebuilt (there was a "massive imbalance" on it which was causing the turbine side oil seal to wear out , so it was rebuilt) , after this the problems' still there , my oil feed oririce size is 3/32" , if it were too big I suppose it would cause a constant smoke problem .

The motor pulls strong past 9000rpm , idles well and starts quite easily if hot or cold , my plugs come out with a brown/grey deposit on them indicating "good" combustion , I am now thinking oil "cage " rings and / or the oil seal O rings but my builder assures me that those things never cause problems and this guy is the "tini Ito" and I know he knows what he's talking about. I don't want to pull my engine unless I have to ( you know how much fun that is ) .
DuMaurier 7 is offline  
Old 12-22-2003, 08:32 PM
  #2  
Junior Member
 
Join Date: Dec 2003
Location: Sydney Australia
Posts: 11
Default

sounds like a oil seal in the turbo. i have only just bought a brand new T-66 just cause the old on did this.



get it checked dude.





Ernie
Sharky is offline  
Old 12-23-2003, 12:06 AM
  #3  
Junior Member
 
Join Date: Dec 2003
Location: Sydney Australia
Posts: 11
Default

i have to add this...... be very carefully as very soon if its not looked at you will develop blowback.



trust me i have only just gone thru this and i dont want to see someone else suffer.
Sharky is offline  
Old 12-23-2003, 06:32 AM
  #4  
Member
 
Join Date: Aug 2002
Posts: 65
Default

The symptoms sound exactly like what you get with worn oil control rings/seals. I have only seen one engine that was excessivly bad. It did exactly the same thing. When I pulled it apart the the oil rings/seals were completely stuffed. However, it was an old 12A which had been sitting around for a few years and the rubber o-rings were hard and brittle.



Could possibly be the turbo. Maybe the oil pressure is just getting high enough at high revs to make it blow past. Don't know about all this 3/32" **** (stupid imperial system), but my turbo seems fine with a 2mm restrictor (although most people seem to use around 1.5mm). It's a long shot. Like you said, I'd expect that if it was too big the turbo would leak all the time.
little rotor is offline  
Old 12-23-2003, 06:19 PM
  #5  
Senior Member
Thread Starter
 
Join Date: Mar 2003
Posts: 410
Default

yeah I'm thinking the same thing lil rotor , I think I'll drag the motor out and change those seals , I got some other little things to deal with so it won't feel like I am going in unnecessarily.
DuMaurier 7 is offline  
Old 12-23-2003, 06:50 PM
  #6  
Senior Member
 
Join Date: Jul 2001
Location: Tulsa, OK
Posts: 3,346
Default

Just sounds like blow by to me. Typical if you let off the gas and then get back on it.
94touring is offline  
Old 12-23-2003, 06:54 PM
  #7  
Senior Member
Thread Starter
 
Join Date: Mar 2003
Posts: 410
Default

Nope , not the amount I'm getting .. I'ts friggin embarrasing !!!, and before all this **** started there wasn't any visible vapours / fumes coming out.
DuMaurier 7 is offline  
Old 12-23-2003, 06:59 PM
  #8  
Senior Member
 
Join Date: Jul 2001
Location: Tulsa, OK
Posts: 3,346
Default

Do you have the crankcase blocked by any chance?
94touring is offline  
Old 12-23-2003, 07:23 PM
  #9  
Senior Member
Thread Starter
 
Join Date: Mar 2003
Posts: 410
Default

Nope , I have three vents , two original one and another through the cap. when I remove the cap and do a free rev . there is absolutely no blow by and I build about 5 psi boost when I do that.

I also suspect the O rings because they aren't original Mazda , A guy was selling a Felpro kit (so he clamed) , the price was good so I bought it , now I know why the pricewas good.
DuMaurier 7 is offline  
Old 12-30-2003, 01:23 AM
  #10  
Senior Member
 
Join Date: Dec 2003
Location: Southeast
Posts: 502
Default

My, My those felpro kits!!!!!!!!!!!!!!!!!!!! You F***** up big time. Mazda OEM stuff next time. I dont even mess with em new viton stuff thar.
boost_creep is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Turbo II
Insert BS here
5
08-15-2002 05:07 PM
Fluke_SDS
Insert BS here
17
07-31-2002 10:09 PM
treceb
2nd Generation Specific
2
05-08-2002 11:19 AM
treceb
Insert BS here
8
03-19-2002 01:18 PM
treceb
TRI7
5
01-17-2002 02:17 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: Hmmm , What Do You Guys Think.


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.