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

Engine carbon locked and won't free up. Now what?

Thread Tools
 
Search this Thread
 
Old 09-08-07, 11:49 PM
  #1  
Full Member
Thread Starter
 
feerocknok's Avatar
 
Join Date: Feb 2007
Location: Bend, OR
Posts: 77
Likes: 0
Received 0 Likes on 0 Posts
Engine carbon locked and won't free up. Now what?

I can't get this summabee' to un-carbon lock!
Motor's been sitting for years, can't remember how many now but over 5 years.
The car was in a head-on collision, so the motor was good when the car got totalled.

I've put 5W20, 10W30, PB Blaster, and MMO through the spark plug holes, intake ports, and I tried/failed at putting it in the exhaust ports. The different lubricants were put in at different times over this past month and the motor hasn't been able to rotate at all.

Is this motor wasted? Is there anyway to pull it apart without spending mucho dinero and rescue it? The motor isn't in the car persay. It's sitting in my Toyota truck with the front clip removed.
Old 09-09-07, 12:28 AM
  #2  
Full Member
Thread Starter
 
feerocknok's Avatar
 
Join Date: Feb 2007
Location: Bend, OR
Posts: 77
Likes: 0
Received 0 Likes on 0 Posts
In case it matters, it's a 12A from an '81.
Old 09-09-07, 12:39 AM
  #3  
Lives on the Forum

iTrader: (13)
 
Rx-7Doctor's Avatar
 
Join Date: Jul 2004
Location: Oregon
Posts: 10,584
Likes: 0
Received 11 Likes on 10 Posts
https://www.rx7club.com/1st-gen-archive-71/other-decarbonizing-rotary-featured-article-281207/
Old 09-09-07, 12:43 AM
  #4  
Lives on the Forum

iTrader: (13)
 
Rx-7Doctor's Avatar
 
Join Date: Jul 2004
Location: Oregon
Posts: 10,584
Likes: 0
Received 11 Likes on 10 Posts
Changed the title of the thread to see if the computer would reference similar threads.
Scroll down to end of this page to view other threads that may help also besides the main one that I posted the link for.
Old 09-09-07, 12:52 AM
  #5  
Full Member
Thread Starter
 
feerocknok's Avatar
 
Join Date: Feb 2007
Location: Bend, OR
Posts: 77
Likes: 0
Received 0 Likes on 0 Posts
Yup, been through the carbon locked procedure, but it won't budge at all, even with the breaker bar.
I appreciate the retitle to help me find more threads though!

Would it be any help to myself to tear the motor open?
Old 09-09-07, 01:04 AM
  #6  
Full Member
Thread Starter
 
feerocknok's Avatar
 
Join Date: Feb 2007
Location: Bend, OR
Posts: 77
Likes: 0
Received 0 Likes on 0 Posts
Ugh... Missed this:
At this point if nothing of the above has worked, you already have the engine out so you can either pick up a rebuild kit, take the engine in to a rotary shop, or get another engine.
So it has to be rebuilt. Son-of-a.
Old 09-09-07, 01:16 AM
  #7  
Too old to act my age

 
Rogue_Wulff's Avatar
 
Join Date: Feb 2005
Location: Tulsa, Ok.
Posts: 3,164
Likes: 0
Received 0 Likes on 0 Posts
If it has been sitting for several years, it may have rusted up inside. They can do this when they are not turned over every so often. Humidity in the air can condense into water inside the engine. Not a good sight.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
Kyo
2nd Generation Specific (1986-1992)
6
04-13-19 09:24 AM
alphawolff
1st Generation Specific (1979-1985)
17
11-17-15 05:57 PM
thecody59
1st Generation Specific (1979-1985)
40
08-23-15 06:41 PM



Quick Reply: Engine carbon locked and won't free up. Now what?



All times are GMT -5. The time now is 12:52 AM.