3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.
Sponsored by:

Why did this engine die?

Thread Tools
 
Search this Thread
 
Old 05-05-15 | 11:01 PM
  #1  
idonaldson's Avatar
Thread Starter
Full Member
iTrader: (2)
 
Joined: Apr 2012
Posts: 103
Likes: 2
From: Austin, TX
Question Why did this engine die?

I finally (three years later!) got time to tear into the engine that came in my car when I bought it three years ago. According to the car lot sales man it had a broken connecting rod.... Well I compression checked it at the lot, and there was 0 compression in either housing. Figured it was blown apex seals, and proceeded to buy a 1000 mile rebuild from Rapid Rotors in Kent Washington. All is going well with the heart transplant, still ordering parts here and there and hopefully it will roll under it's own power soon!

Here are the pictures of the rotors, their seals, the housings, and the irons. Other than a TON of carbon buildup on the rotors, I don't see anything out of the ordinary, do any of you? Or if you'd like better pictures, I'll gladly take some with the wife's DSLR and get them uploaded as well.

13B-REW - Album on Imgur

What's the best way to clean all this up? I called a local machine shop to see if they'd be willing to hot tank the irons and rotors and cold tank the housings and it'll probably run me $80 to have it all cleaned by them. Or would I be better off buying a case of brake cleaner and going at them myself?
Old 05-05-15 | 11:07 PM
  #2  
IRPerformance's Avatar
Sponsor
iTrader: (41)
 
Joined: Apr 2003
Posts: 11,347
Likes: 317
From: NJ
Pics aren't the greatest but it looks like either it detonated and broke a seal, or a chunk of carbon broke off causing the scoring and damage you see.
Old 05-05-15 | 11:12 PM
  #3  
idonaldson's Avatar
Thread Starter
Full Member
iTrader: (2)
 
Joined: Apr 2012
Posts: 103
Likes: 2
From: Austin, TX
What seal would be broken? It looked to me that all the apex seals were in tact and all the side seals were as well. Now when I push the side seals in, they are very, very slow to bounce back. Any ideas on cleaning all the parts up?
Old 05-06-15 | 05:04 AM
  #4  
TheSquiid's Avatar
Junior Member
 
Joined: Nov 2014
Posts: 15
Likes: 0
From: New Zealand
If your wife is ok with it, chuck them in the dish washer
Old 05-06-15 | 07:24 AM
  #5  
Banzai-Racing's Avatar
Rotary Specialists
RX7Club Vendor
iTrader: (11)
 
Joined: Jan 2008
Posts: 4,834
Likes: 318
From: Indiana
Look for a missing tip

Old 05-06-15 | 09:15 AM
  #6  
idonaldson's Avatar
Thread Starter
Full Member
iTrader: (2)
 
Joined: Apr 2012
Posts: 103
Likes: 2
From: Austin, TX
No dishwasher. I'll probably try and get them hot tanked and see how that goes.

Banzai, I'll get the rotors tore down tonight and try and get some higher quality pictures uploaded.
Old 05-06-15 | 10:45 AM
  #7  
t-von's Avatar
Rotor Head Extreme
iTrader: (8)
 
Joined: Apr 2002
Posts: 6,719
Likes: 26
From: Midland Texas
Looks like a missing apex seal.

Last edited by t-von; 05-06-15 at 10:50 AM.
Old 05-06-15 | 11:44 PM
  #8  
idonaldson's Avatar
Thread Starter
Full Member
iTrader: (2)
 
Joined: Apr 2012
Posts: 103
Likes: 2
From: Austin, TX
Thumbs down

And the culprit is....broken apex seals! So this engine is supposed to have 3 piece apex seals.

Rotor #1 seems to be missing the entire top portion of the apex seal. There's no sign of it anywhere
other than the 1/8" piece I pulled out of the turbos when I first got the car.




Rotor #2 has all the pieces for apex seals, but something seems to have went through the spin cycle and hammered one of the seals. It's busted into three pieces and stuck in the rotor.
Why did this engine die?-xeny0m1.jpg
Why did this engine die?-fpsmzmf.jpg


Are these rotors rebuildable or glorified door stops now?
Old 05-07-15 | 12:22 PM
  #9  
IRPerformance's Avatar
Sponsor
iTrader: (41)
 
Joined: Apr 2003
Posts: 11,347
Likes: 317
From: NJ
Most likely that rotor is done. You MIGHT be able to re-clearance it but I don't recommend it.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
stickmantijuana
Microtech
30
04-23-16 07:37 PM
alphawolff
1st Generation Specific (1979-1985)
17
11-17-15 06:57 PM
LunchboxSA22
2nd Generation Specific (1986-1992)
37
10-26-15 11:53 AM
rotor_veux
2nd Generation Specific (1986-1992)
10
08-23-15 10:06 PM
86glxNA
New Member RX-7 Technical
7
08-22-15 09:54 PM




All times are GMT -5. The time now is 02:24 PM.